Title of Invention

JUICE EXTRACTOR

Abstract The present invention relates to a juice extractor capable of extracting juice from vegetables, fuits or soymilk from beans is disclosed. The extractor includes a housing having a draff outlet port and a juice outlet port, a screw having an upper rotary shaft inserted in a rotary shaft hole of the housing and a lower rotary shaft with a plurality of screw spirals formed on an outer periphery thereof, and a mesh drum for extracting the juice toward the juice outlet port, and rotary brush mounted between the housing and the mesh drum and having a brush holder. Various nutrients and intrinsic flavor contained in the vegetables or fruits are maintained to the fullest extent by employing a very low speed screw of a squeezing mode. Also, since the housing accommodating the screw is vertically fixed to an upper portion of a drice unit, the material is automatically moved downward without pressing the material down, and the draff is discharged while squeezing and grindinc the materials put in an inlet port. Figs. 1 & 2 of the drawings illustrate the invention.
Full Text Technical Field
The present invention relates to a juice extractor
capable of extracting juice from vegetables, fruits, or
soymilk from beans, and more particularly to a juice
extractor which performs an excellent juice-extracting
function irrespective of kinds of vegetables or fruits, and
maintains the freshness of juice by employing a very low
speed rotating method, so that the size of the juice
extractor and noise are greatly reduced, and the assembling,
disassembling, and clearing of the juice extractor can be
simply performed.
Background Art
For a healthy livelihood, directly making and taking
juice including green juice at home is on the increase. For
this, many apparatuses that can simply extracting juice from
vegetables or fruits at home have been provided.
The existing juicers crushes materials put into an
inlet port at high speed and produces juice in a centrifugal
separation method. However, the existing juicers have the
drawbacks in that during such a high-speed crushing process,
intrinsic flavor and nutrients contained in fruits may be
destroyed, and it is difficult to extract green juice from
vegetables having branches or leaves. It is also difficult to


extract juice from fruits having a high viscosity such as
kiwi or strawberry, and it is impossible at all to extract
soymilk from beans. In addition, for continuous extraction of
juice from vegetables or fruits, it is required to frequently
disassemble and clean the juicer to remove draff (i.e.,
residue) caught in meshes of a strain net.
Korean Utility Mode . Registration No. 190676, which has
been granted to the applicant, discloses a grinder combined
with a juice extractor. FIG. 1 is a sectional view
illustrating the structure of a conventional juice extractor.
As shown in FIG. 1, the conventional juice extractor 10 is
provided with a long screw 20 horizontally assembled in a
drum together with a juice-extracting net and a drum cap and
engaged with a side surface of a drive unit. Thus, the juice
extractor is horizontally lengthened, and performs the juice
extraction as materials put into an inlet port 30 are
horizontally transferred a low speed.
Accordingly, wide space is required in using or keeping
the juice extractor 10 in custody. Also, since the juice
extraction is performed as the materials are horizontally
moved, the juice-extracting speed becomes low, and thick
juice cannot flow downward well, but remains in the drum.
Also, since no rotary shall is provided on one side of the
screw 20, the screw 20 having no rotary shaft is shaken when
it is rotated, and collides with wall blades formed on an
inner wall of the juice-extracting net to cause noise and
abrasion of the screw to occur.


In addition, since the juice outlet port 40 is in a low
position, only a low juice cup can be used, and it is
impossible to use a long mice cup.
Disclosure
Technical Problem
The present invention has been made in view of the
foregoing problems, and it is an object of the present
invention to provide a juice extractor which can prevent
beans or vegetables from becoming stale and make extracted
juice well flow downward irrespective of the kinds of
vegetables or fruits, i.e., even if the extracted juice is a
thick fruit juice or soymilk.
Another object of the present invention is to provide a
juice extractor which can heighten the speed of juice
extraction and make the extracted juice well flow downward
without remaining in a housing.
Still another object of the present invention is to
provide a juice extractor which can prevent shaking or
striking of a juice-extracting screw upon operation of the
screw and thus reduce noise occurrence with the abrasion of
the screw prevented.
Still another object of the present invention is to
provide a juice extractor which can make materials
automatically move downward without pressing the materials,
and can be continuously used without the necessity of
frequently disassembling and cleaning the juice extractor.


Technical Solution
In order to achieve the above objects, in one aspect of
the present invention, there is provided a juice extractor,
which includes a cover having an inlet port formed on one
side of an upper part thereof and a rotary shaft hole formed
in the center of an inner part thereof; a housing installed
on a lower part of the ccver, and having a guide jaw formed
on a bottom of the housing, a draff outlet port and a juice
outlet port formed apart from each other on a lower end part
of the housing, a waterproof cylinder having a through hole
and formed in the center of the lower end part of the
housing, and a pressure discharge passage formed around a
lower part of the waterproof cylinder; a screw having an
upper rotary shaft formed on an upper part of the screw to be
rotatably inserted into the rotary shaft hole, a plurality of
screw spirals formed on an outer surface of the screw, an
inner ring formed at a lower end of the screw to project
downward and having a plurality of screw gears rotatably
inserted into the pressure discharge passage, a lower space
formed inside the inner ring to receive the waterproof
cylinder therein, and a lower rotary shaft formed in the
center of a lower part of the screw and a polygonal shaft
hole formed thereon; a mash drum having a mesh structure
formed on an outer wall of the mesh drum to discharge juice
to the juice outlet port and a plurality of wall blades
longitudinally formed on an inner surface of the mesh drum to


be inserted into the guide jaw; a rotary brush installed
between the housing and the mesh drum to be rotated, and
having a brush holder in which a brush for continuously
sweeping the mesh drum and the housing is installed; and a
drive unit having a polygonal shaft that is inserted into the
polygonal shaft hole through the through hole of the
waterproof cylinder, and rotating the screw at a low speed;
wherein the housing accomnodating the screw is longitudinally
fixed to an upper side of the drive unit so as to press,
grind and extract juice from materials put into the inlet
port and to discharge the draff.
The pressure discharge passage of the housing may be
connected to the juice outlet port.
The draff discharge means may include a discharge jaw
formed at an end of a lower part of the spirals of the screw
by internally cutting a lower border of the screw; a bottom
ring formed at an end of a lower part of the mesh drum, and
having an inner ring insertion hole formed thereon to
accommodate the inner ring; a discharge slant surface formed
on an upper surface of the bottom ring, the discharge slant
surface being in the form of a circular arc of which the
depth is increased in a lotating direction of the screw; a
mesh drum discharge hole connected to an end of the discharge
slant surface to discharge the draff out of the mesh drum;
and a housing discharge hole formed on one side of the bottom
of the housing and connected to the mesh drum discharge hole
and the draff outlet port; wherein the discharge jaw


discharges the draff to the draff outlet port through the
housing discharge hole by rushing the draff to the mesh drum
discharge hole as the discharge jaw is rotated along the
discharge slant surface.
A circular projection may be formed at an edge of an
inner side of the bottom ring, a circular groove may be
formed on an outer side of the circular projection, an outer
ring may be formed on an outer periphery of the inner ring to
project downward, and a carcular projection insertion hole
may be formed between the inner ring and the outer ring; and
wherein the outer ring is ratatably inserted into the
circular groove to extend a contact area with the draff being
guided by the discharge jaw, and the circular projection is
inserted into the circular projection insertion hole to
minimize an inflow of the draff to the pressure discharge
passage.
A strain net and a pressing net having a plurality of
meshes formed thereon may be formed on an upper part and a
lower part of an outer wall of the mesh drum, and a sealing
structure in which a plurarity of grinding blades 390 are
longitudinally formed may be formed between the strain net
and the pressing net; wherein the juice is discharged to the
juice output port through 1 he strain net and the pressing
net.
A plurality of engagement jaws may be formed on a
border of a lower end part of the cover, a plurality of
engagement projections may be formed on an outer periphery of


an upper end of the housing, engagement hooks may be formed
on the drive unit, wherein the housing that is engaged with
the cover by the engagement of the engagement jaws with the
engagement projections is detachably secured to the drive
unit by the engagement hooks.
The brush may be composed of a net brush attached to an
inner surface of the brush holder to continuously sweep the
outer wall of the mesh dram, and a housing brush attached to
an outer surface of the brush holder to continuously sweep
the inner wall of the housing.
A brush gear may be mounted on a lower part of the
brush holder, and an in dermediate gear may be rotatably
mounted on the lower surface of the housing to be engaged
with the brush gear; wherein the intermediate gear, which is
engaged with the screw gear, rotates the brush gear.
A slant surface may be formed on a lower end surface of
the inlet port of the cover in the rotating direction of the
screw.
The draff discharge means may further include an
elastic packing mounted on one side of the bottom surface of
the housing discharge hole one side of the packing being
inserted into an insertio 1 groove formed on the bottom
surface of the housing to achieve sealing, and the other side
thereof being in close contact with an outlet of the housing
discharge hole.
The cover may further include a securing projection
formed on an outer periphery of the cover, the securing


projection being positioned in the rear under the assumption
that the juice outlet port and the draff outlet port of the
housing are positioned in the front.
The drive unit may include a base frame in which a
motor and a control device are installed, a housing
engagement surface formed on an upper surface of the base
frame, a polygonal shaft of the motor formed to project in
the center of the engagement surface, a plurality of
engagement hooks formed on an outer periphery of the
engagement surface to secure the housing, a support frame
having a mounting surfa be formed on one side of the housing
engagement surface of the base frame to correspond to a side
surface of the housing tnd extending from the base frame to
support the housing, a securing groove which is formed on an
upper surface of the support frame and to which the securing
projection of the cover is secured, and a handle unit
extending from an upper and of a rear surface of the housing
mounting surface of the support frame to a lower end of the
base frame.
Advantageous Effect:
According to the juice extractor as constructed above
according to the present invention, various nutrients and
intrinsic flavor contained in juice, soymilk, and so forth,
are maintained to the fullest extent, by adopting a screw
squeezing at a very low speed instead of crushing using a
high-speed rotating blade, and the extensive juice extraction


is possible irrespective of the kinds of vegetables and
fruits.
The housing of the juice extractor is longitudinally
assembled to the upper side of the drive unit, and thus the
materials are naturally moved downward by the gravity and the
rotation of the screw, and the juice-extracting speed is
heightened. Accordingly, the extracted juice well flows
downward without remaining in the housing, and thus any kind
of vegetables and fruits can be juiced promptly.
Further, since the screw is bidirectionally fixed, and
thus the vibration of the screw is prevented, shaking or
striking of the screw against the inner wall of the mesh drum
is prevented during the operation of the screw to reduce the
noise occurrence and to prevent abrasion of the screw.
Furthermore, since the slant surface is formed on one
side of the lower surface of the juice extractor cover, the
materials are automatical by put in the inlet port without
pressing the materials downward.
Brief Description of the Drawings
The foregoing anc other objects, features and
advantages of the present invention will become more apparent
from the following detailed description when taken in
conjunction with the accompanying drawings in which:
FIG. 1 is a sectional view of a conventional juice
extractor;
FIG. 2 is an exploded perspective view of a juice


extractor according to an embodiment of the present
invention;
FIG. 3A is a sectional view of a draff outlet port of a
juice extractor according to an embodiment of the present
invention;
FIG. 3B is a sectional view of a juice outlet port of a
juice extractor according to an embodiment of the present
invention;
FIG. 4 is a plan viev of a housing of a juice extractor
according to an embodiment of the present invention;
FIG. 5 is a perspective view of a juice extractor
according to another embodiment of the present invention;
FIG. 6 is a perspective view of a covered housing
secured to a drive unit a according to another embodiment of
the present invention; and
FIG. 7 is a perspective view of a drive unit of a juice
extractor according to another embodiment of the present
invention.
Bast Mode
Hereinafter, preferred embodiments of the present
invention will be described in detail with reference to the
accompanying drawings. The matters defined in the
description are nothing bit specific details provided to
assist those of ordinary skill in the art in a comprehensive
understanding of the invention, and the present invention is
only defined within the scope of the appended claims.


FIG. 2 is an exploded perspective view of a juice
extractor according to an embodiment of the present
invention. FIG. 3A is a sectional view of a draff outlet port
of a juice extractor according to an embodiment of the
present invention, and FIG. 3B is a sectional view of a juice
outlet port of a juice extractor according to an embodiment
of the present invention. FIG. 4 is a plan view of a housing
of a juice extractor taken along the line A-A' in FIG. 3B.
FIG. 5 is a perspective view of a juice extractor according
to another embodiment of the present invention. FIG. 6 is a
perspective view of a covered housing secured to a drive unit
according to another embodiment of the present invention, and
FIG. 7 is a perspective view of a drive unit of a juice
extractor according to another embodiment of the present
invention.
Referring to FIGS. 2 to 4, a juice extractor according
to an embodiment of the present invention will be described.
The juice extractor according to an embodiment of the present
invention includes a cover 100, a screw 200, a mesh drum 300,
a rotary brush 400, a housing 500, and a drive unit 600.
A cover 100 has a wide lower part, and an inlet port
100 is formed through an upper surface of the cover 100. In
the center of a lower surface of the cover, a rotary shaft
hole 120, into which a lotary shaft of the screw 200 is
inserted, is formed. It i 3 preferable that the rotary shaft
hole 120 is formed in the center of the cover 100, and the
inlet port 110 is eccentically formed from the center in


which the rotary shaft hole 120 is positioned so that the
rotation of the screw 200 and the input of materials can be
smoothly performed.
In addition, a plurality of engagement jaws 130 are
formed to project from the border of a lower end part of the
cover 100, and a slant surface 140 is formed on a lower end
surface of the inlet port L10 in a rotating direction of the
screw 200.
An upper rotary slaft 210, which is formed in the
center of an upper part of the screw 200, is inserted into
the rotary shaft hole 12C of the cover 100 to be rotated. A
plurality of screw spirals, which are in contact with an
inner part of the mesh drum 300, are formed on an outer
surface of the screw 200.
At the lower end of the screw 230, an inner ring 250
having a plurality of screw gears 280 formed thereon is
formed to project downward, and between the lower rotary
shaft 240 and the inner ring 250, a lower space 270 is
formed. In the center of a lower part of the screw 200 that
is inside the inner rirg 250, there is provided a lower
rotary shaft 240 having a polygonal shaft hole 230 formed
thereon.
It is preferable that the screw gear is in the form of
a wing.
In the end part of a lower part of the spirals of the
screw 200, a discharge jaw 225 is formed by internally
cutting the lower border of the screw 200, and serves to


discharge draff, which has been transferred to the bottom
surface of the mesh drum 500, out of the mesh drum 300.
Preferably, on the outer periphery of the inner ring
250, an outer ring 260 is formed to project downward. This
outer ring 260 is provided to extend the contact area with
the draff that is pushed by the discharge jaw 225 of the
screw and is discharged out of the mesh drum 300. In
addition, a circular projection insertion hole 290 is formed
between the inner ring 250 and the outer ring 260.
On inner wall of the mesh drum 300, wall blades 310,
which include long blades and short blades, are
longitudinally projectec at predetermined intervals. It is
preferable that the height of projected wall blades is
decreased toward the lower part of the wall blades so that
the wall blades 310 crush the materials fine as the materials
are moved downward by the screw 200.
The outer wall of the mesh drum 300 has a mesh
structure so that the juice extracted from the grinded
material passes through the mesh structure. It is preferable
that the size of the mesh is gradually decreased toward the
lower part of the mesh structure since the size of the
material particles is decreased toward the lower part of the
mesh drum 300. In addition, since the material is finely
grinded at an intermediate height of the mesh drum 300, the
intermediate part of the mesh drum 300 has a sealing
structure rather than a mesh structure so as to prevent the
draff from being caught in the mesh structure or from


slipping through the mesh structure and being mixed with the
juice.
On the inner surface of the intermediate part of the
mesh drum 300 that has the sealing structure, a plurality of
grinding blades 390 are formed to project in addition to the
wall blades 310. A strain net 320 is formed at an upper part
of the mesh structure formed on the outer wall of the mesh
drum 300, and a pressing ret 330 of fine meshes is formed at
a lower part of the mesh structure.
A bottom ring 340 hiving an inner ring insertion hole
380 formed thereon is formed at a lower end of the mesh drum
300 to form the bottom surface of the mesh drum 300 that
covers the inner ring 250 of the screw 200, and a discharge
slant surface 350 in the form of a circular arc of which the
depth is increased in a rotating direction of the screw 200
is formed on the upper surface of the bottom ring 340. Also,
a mesh drum discharge hole 360 for discharging the draff out
of the mesh drum 300 is formed at the end of the discharge
slant surface 350.
Accordingly, the material transferred to the
intermediate part along the wall blades 310 of the mesh drum
300 is further grinded at the intermediate part where plural
grinding blades 390 exist. In the case of soymilk, a portion
of the soymilk is discharged out of the mesh drum 300 through
the strain net 320, and the remaining portion of the soymilk
is further grinded to be discharged out of the mesh drum 300
through the pressing net 330. The draff is discharged to the


mesh drum discharge hole 360 along the discharge slant
surface 350.
Preferably, a ring-shaped circular projection 370 is
further formed at the lover edge of the mesh drum, and a
circular groove 375 is further formed around the circular
projection 370. In the circular groove 375, the outer ring
260 is rotatably inserted to extend the contact area with the
draff being discharged to the outside. The circular
projection 370 is inserted into the circular projection
insertion hole 290, and serves to prevent the draff from
moving toward a pressure discharge passage 580 by a high
pressure.
The housing 500 accommodates the screw 200 and the mesh
drum 300. A plurality of engagement projections 510 are
formed on an upper peripnery of the housing 500, and a
waterproof cylinder 530 having a through hole 520 formed
thereon is formed on a center lower end part of the housing
500, and is inserted into the lower space 270 of the screw
200. On one side of the bottom surface, a housing discharge
hole 540 secured to the nesh drum discharge hole 360 is
formed. On the lower side of the outer surface of the
housing, a juice outlet port 560 and a draff outlet port 570
are provided, and on the bottom surface around the waterproof
cylinder 530 of the lower end part, a pressure discharge
passage 580 is formed so the t the screw gear 280 of the screw
is inserted into the passage 580 to be rotated.


On the lower surface of the housing 500, a fixing
groove 515 is formed, and around the pressure discharge
passage 580, a circular guide jaw 550 is formed around the
pressure discharge passage 580 so that the bottom ring 340 of
the mesh drum 300 is inserted into and fixed to the guide jaw
550 to fix the mesh drum 100. On the lower end of the housing
discharge hole 540, a packing 575 made of rubber and so on is
mounted. One side of the packing 575 is inserted into an
insertion groove 576 formed on the bottom surface of the
housing, and the other sice thereof is in close contact with
the outlet of the housing discharge hole 540.
Preferably, the pressure discharge passage 580 is
connected to the juice outlet port 560.
The rotary brush 400 is mounted between the housing 500
and the mesh drum 300 to be rotated, and is provided with a
brush holder 430 in which a brush for continuously sweeping
the mesh drum 300 and the housing 500 is installed.
The brush is composed of a net brush 410 attached to
the inner surface of the brush holder 430 to continuously
sweep the outer wall of the mesh drum 300, and a housing
brush 420 attached to the outer surface of the brush holder
430 to continuously sweep the inner wall of the housing 500.
The net brush 410 is composed of a pressing net brush
460 for scraping the strain net 320 of the mesh drum 300, and
a pressing net brush 460 for sweeping the pressing net 330 of
the mesh drum 300, which are attached to the brush holder 430
in consideration of the intermediate surface having a sealing


structure as the boundary between them. The net brush 410 and
the housing brush 420 may be formed in a body.
In order for the cotary brush 400 to sweep the mesh
drum 300, the brush holder 430 is constructed to be rotated.
Preferably, a brusn gear 440 is mounted on the lower
part of the brush holder 430, and an intermediate gear is
rotatably mounted on the lower surface of the housing 500 to
be engaged with the brush gear 440. The intermediate gear
590, which is engaged with the screw gear 280, rotates the
brush gear 440.
The intermediate gear 590 is inserted in an
intermediate gear rotary shaft 595 that is formed on the
lower surface of the housing so that the screw gear 280 is
engaged with the intermediate gear 590 at the pressure
discharge passage 580.
The drive unit 600 is provided with a polygonal shaft
610, which projects upwat a to be inserted into the polygonal
shaft hole 230 of the screw 200 through the through hole 520
and rotates the screw at low speed, and a plurality of fixing
projections 630 that are inserted into the fixing groove 515
of the housing 500 to fix the housing 500.
The polygonal shaft 610 is connected to a motor and a
speed reducer (not illustrated) to be rotated.
A plurality of engagement jaws 130 are projected on the
border of the lower erd part of the cover 100, and a
plurality of engagement projections 510 are formed on the
outer periphery of an upper end of the housing 500. As the


engagement projections 510 are engaged with the engagement
jaws 130, the cover 100 is detachably secured to the housing
500.
On the upper surface of the drive unit 600, a pair of
engagement hooks 620, which are fixed to the housing 500
secured to the cover 100, are further provided on the upper
surface of the drive unit 600 to prevent vibration of the
juice extractor.
The speed reducer used in the present invention serves
to reduce the rotating speed of the motor, and makes the
screw rotate at a very low speed in comparison to the screw
of the conventional juice extractor.
The operation of the juice extractor as constructed
above according to embodments of the present invention will
be described.
When materials are put into the inlet port 110 of the
cover 100, they are move inside the mesh drum 300 along the
slant surface 140 formed on the lower surface of the cover
100. The materials moved into the mesh drum 300 are finely
grinded and pressed as they are compulsorily conveyed
downward by the rotation of the screw 200 and the wall blades
310. Juice produced in this process flows out of the mesh
drum through meshes formed on the outer wall of the mesh drum
300, and then are discharged through the juice outlet port
560.
The draff that reaches the bottom ring 340 of the mesh
drum 300 by the rotation of the screw 200 is pushed by the


discharge jaw 225 at the lower end of the screw 200, and is
guided to the mesh drum discharge hole 360 along the
discharge slant surface 380. In this case, if the packing 575
that blocks up the outlet of the housing discharge hole 540
is pressed with a specified pressure, a gap is produced
between the outlet of the discharge hole 540 and the packing,
and through this gap, the draff is discharged. The discharged
draff is then discharged out of the draff outlet port 570 of
the juice extractor.
The grinded materials are finally pressed at the bottom
ring 340 of the mesh drum 300. In this process, the most part
of juice flows to the outside through the meshes formed on
the outer wall of the mesh drum 300 and then is discharged
through the juice outlet port 560, and only a part of juice
is pushed into the gap between the inner ring 250 of the
screw 200 and the inner ring insertion hole 380 of the mesh
drum 300 to flow to the pressure discharge passage 580.
However, since the pressure discharge passage 580 is
connected to the juice outlet port 560, the part of juice is
finally discharged to the outside through the juice outlet
port 560.
If the pressure discharge passage 580 is not connected
to the juice outlet port 560, the juice pushed with pressure
to the gap between the inner ring 250 of the screw 200 and
the inner ring insertion hole 380 flows over the waterproof
cylinder 530 and is discharge out of the housing through the
gap between the through hole 520 and the polygonal shaft 610.


This may cause the pollution of the motor or speed reducer of
the drive unit 600 and the leakage through the outer surface
of the juice extractor.
Even if the juice is thick and thus cannot flow
naturally, it is compulserily guided to the juice outlet port
560 by the screw gear 280 of the inner ring 250.
The reason why the screw gear 280 is in the form of a
wing is to compulsorily discharge the thick juice having a
high viscosity to the juice outlet port 560 more efficiently.
The screw gear 280 serves to rotate the rotary brush
400 by transferring the bower of the drive unit 600 to the
rotary brush 600. In other words, since the screw gear 280 is
engaged with the brush gear 440 by the intermediate gear 590,
the brush holder 430 is lotated as the screw 200 is rotated
by the drive unit 600. Accordingly, the mesh brush 410
mounted on the brush holier 430 and the housing brush 420
continuously sweep the outer wall of the mesh drum 300 and
the inner wall of the housing 500, respectively, and thus can
make the thick juice or so milk flow effectively. Also, since
the outer wall of the mesh cirum 300 is continuously swept, it
is not required for a user to frequently disassemble and
clean the mesh drum 300.
The inner surface of the intermediate part of the mesh
drum 300 has a sealing stricture, and a plurality of grinding
blades 390 are projected therefrom in addition to the wall
blades 310. The strain net 320 is formed at the upper part of


the mesh drum 300, and the pressing net 330 of fine meshes is
formed at a lower part of the mesh drum 300.
Accordingly, the ju.ce produced while the materials are
compulsorily transferred along the wall blades 310 of the
mesh drum 300 flows to tne outside through the strain net
320, and the juice produced while the materials are finely
grinded at the inner surface of the intermediate part having
the sealing structure in which a plurality of grinding blades
390 exist is discharged to the juice outlet port 560 through
the pressing net 330.
The draff is discharged to the mesh drum discharge hole
360 along the discharge slant surface 350 of the bottom.
At this time, the outer ring 260 serves to smoothly
move and discharge the draff by extending the contact area
with the draff that is pushed to move along the discharge
slant surface 350 by the discharge jaw 225 of the screw 200
and is guided to the mesh drum discharge hole 360.
The circular projection 370 is inserted into the
circular projection insertion hole 290 of the lower part of
the screw without any gap therebetween, and suppresses at
maximum the inflow of the draff into the pressure discharge
passage 580 even if a pressure is applied to the draff at the
bottom ring 340.
In addition, since the screw 200 and the mesh drum 300
are longitudinally assembled in the housing 500, the speed at
which the materials are moved downward is heightened and the
juice inside the housing 500 easily flows downward without


remaining in the housing 500, in comparison to the
conventional juice extractor in which the screw and the mesh
drum are horizontally assembled.
A juice extractor according to another embodiment of
the present invention will be described with reference to
FIGS. 5 to 7.
The juice extractor according to another embodiment of
the present invention includes a cover 100, a screw 200, a
mesh drum 300, a rotary brush 400, a housing 500, and a drive
unit 600. Since the screw 200, the mesh drum 300, the rotary
brush 400, and the housing 500 are the same as those of the
juice extractor according to one embodiment of the present
invention, detailed explanation thereof will be omitted.
Also, the operations thereof are the same as those in one
embodiment of the present invention, detailed explanation
thereof will be omitted.
In another embodiment of the present invention, a
securing projection 150 is formed on the outer periphery 135
of the cover 100, and a projection part is formed in the
center of the securing projection 150. The securing
projection 150 is positioned in the rear under the assumption
that the juice outlet port 560 and the draff outlet port 570
of the housing 500 are positioned in the front. The cover 100
is secured to the housing SCO in which the screw 200, the
mesh drum 300, and the rotary brush 400 are installed, and
then the housing 500 is mounted on the drive unit 600.


The drive unit 600 includes a base frame 640 in which a
motor and a control device (not illustrated) are installed, a
housing engagement surface 650 formed on an upper surface of
the base frame 640, a polygonal shaft 610 of the motor formed
to project in the center of the engagement surface 650, a
plurality of engagement hooks 620a formed on an outer
periphery of the engagement surface 650 to secure the housing
500, a support frame 66C having a mounting surface formed on
one side of the housing engagement surface 650 of the base
frame 640 to correspond to a side surface of the housing 500,
and extending from the base frame to support the housing 500,
a securing groove 665 which is formed on an upper surface of
the support frame 660 and to which the securing projection
150 of the cover 100 is secured, and a handle unit 670
extending from an upper end of a rear surface of the housing
mounting surface of the support frame 660 to a lower end of
the base frame 64 0.
The engagement hooks 620a, which are formed on the
housing engagement surface 650, are inserted into the
engagement groove (not illustrated) formed on a bottom
surface of the housing, and then the housing 500 is fixed to
the engagement surface 550 by slightly rotating the housing
500.
At the center part of the securing groove 665, a micro
switch 666 is installed. When the securing projection 150
formed on an outer periphery 135 of the cover 100 is secured
to the securing groove 665, the projection part of the


securing projection presses the micro switch 666 to operate
an operation switch 675, while when the securing projection
150 is not secured to the securing groove 665, the micro
switch 66 is not turned on, so that the operation switch 675
cannot operate the juice extractor.
Industrial Applicability
As can be seen from the foregoing, the juice extractor
according to the present invention has the following effects.
First, by adopting a screw squeezing at a very low
speed instead of crushing using a high-speed rotating blade,
various nutrients and intrinsic flavor contained in juice,
soymilk, and so forth, are maintained to the fullest extent,
and the extensive juice extraction is possible irrespective
of the kinds of vegetables and fruits.
Second, since the housing of the juice extractor is
longitudinally assembled to the upper side of the drive unit,
the materials are natural by moved downward by the gravity and
the rotation of the screw, and the juice-extracting speed is
heightened. Accordingly, the extracted juice well flows
downward without remaining in the housing, and thus any kind
of vegetables and fruits can be juiced promptly.
Third, since the screw is bidirectionally fixed, the
vibration of the screw is prevented, and thus shaking or
striking of the screw against the inner wall of the mesh drum
is prevented during the operation of the screw to reduce the
noise occurrence and to prevent abrasion of the screw.


Fourth, a screw gear in the form of a wing is mounted
on the lower surface of the inner ring of the screw, and thus
an excellent juice-extraction performance can be achieved
when making a thick fruit juice or soymilk.
Fifth, by connecting the pressure discharge passage,
which is provided in the housing, to the juice outlet port,
the inflow of the juice to the drive unit can be prevented.
Sixth, by additionally forming the outer ring on the
screw, the draff is discharged more smoothly, and by forming
the circular projections on the mesh drum, the inflow of the
draff to the pressure discharge passage is minimized.
Seventh, by forming the slat surface on one side of the
lower surface of the juice extractor cover, the materials are
automatically put in the inlet port without pressing the
materials downward.
Eighth, by installing the rotary brush that can
continuously clean the meshes between the mesh drum and the
housing, it is not required for a user to frequently
disassemble and clean the juice extractor.
Ninth, by installing the brush gear at the lower part
of the rotary brush and rotating the brush via the
intermediate gear connected to the screw gear that is rotated
by the drive unit, no power is separately required.
Tenth, since the packing is inserted into the outlet of
the housing discharge hole and a gap is produced between the
packing and the outlet only when a specified pressure is


applied to the packing, the juice discharged to the draff
outlet port can be reduce i at maximum.
Eleventh, since the micro switch mounted on the drive
unit is operated only when the housing assembled with all the
components is mounted on the drive unit, the safety of the
juice extractor is increased and unnecessary power
consumption is reduced to save the energy.
While this invention has been described in connection
with what is presently considered to be the most practical
and preferred embodiment it is to be understood that the
invention is not limited to the disclosed embodiment and the
drawings. On the contrary, it is intended to cover various
modifications and variations within the spirit and scope of
the appended claims.


I claim :
1. A juice extractor comprising:
a cover having an inlet port formed on one side of an
upper part thereof and a rotary shaft hole formed in the
center of an inner part thereof;
a housing installed on a lower part of the cover, and
having a guide jaw formed on a bottom of the housing, a draff
outlet port and a juice outlet port formed apart from each
other on a lower end part of the housing, a waterproof
cylinder having a through hole and formed in the center of
the lower end part of the housing, and a pressure discharge
passage formed around a lower part of the waterproof
cylinder;
a screw having an upper rotary shaft formed on an upper
part of the screw to be rotatably inserted into the rotary
shaft hole, a plurality of screw spirals formed on an outer
surface of the screw, an inner ring formed at a lower end of
the screw to project downward and having a plurality of screw
gears rotatably inserted into the pressure discharge passage,
a lower space formed insi de the inner ring to receive the
waterproof cylinder therein, and a lower rotary shaft formed
in the center of a lower part of the screw and a polygonal
shaft hole formed thereon;
a mesh drum having a mesh structure formed on an outer
wall of the mesh drum to discharge juice to the juice outlet
port, and a plurality of will blades longitudinally formed on


an inner surface of the mesh drum to be inserted into the
guide jaw;
a rotary brush installed between the housing and the
mesh drum to be rotated, and having a brush holder in which a
brush for continuously sweeping the mesh drum and the housing
is installed; and
a drive unit having a polygonal shaft that is inserted
into the polygonal shaft hole through the through hole of the
waterproof cylinder, and rotating the screw at a low speed;
wherein the housing accommodating the screw is
longitudinally fixed to an upper side of the drive unit so as
to press, grind and extract juice from materials put into the
inlet port and to discharge the draff.
2. The juice extractor of claim 1, wherein the
pressure discharge passage of the housing is connected to the
juice outlet port.
3. The juice extractor of claim 1, further comprising:
a discharge jaw formed at an end of a lower part of the
spirals of the screw by internally cutting a lower border of
the screw;
a bottom ring formed at an end of a lower part of the
mesh drum, and having an inner ring insertion hole formed
thereon to accommodate the inner ring;
a discharge slant surface formed on an upper surface of
the bottom ring, the discharge slant surface being in the


form of a circular arc of which the depth is increased in a
rotating direction of the screw;
a mesh drum discharge hole connected to an end of the
discharge slant surface to discharge the draff out of the
mesh drum; and
a housing discharge hole formed on one side of the
bottom of the housing and connected to the mesh drum
discharge hole and the draff outlet port;
wherein the discharge jaw discharges the draff to the
draff outlet port through the housing discharge hole by
pushing the draff to the mesh drum discharge hole as the
discharge jaw is rotated along the discharge slant surface.
4. The juice extractor of claim 3, wherein a circular
projection is formed at an edge of an inner side of the
bottom ring, a circular groove is formed on an outer side of
the circular projection, an outer ring is formed on an outer
periphery of the inner ring to project downward, and a
circular projection insertion hole is formed between the
inner ring and the outer ring;
wherein the outer ring is ratatably inserted into the
circular groove to extend a contact area with the draff being
guided by the discharge jaw, and the circular projection is
inserted into the circular projection insertion hole to
minimize an inflow of the draff to the pressure discharge
passage.


5. The juice extractor of claim 1, wherein a strain
net and a pressing net having a plurality of meshes formed
thereon are formed on an upper part and a lower part of an
outer wall of the mesh drum, and a sealing structure in which
a plurality of grinding brades 390 are longitudinally formed
is formed between the strain net and the pressing net;
wherein the juice iS discharged to the juice output
port through the strain net and the pressing net.
6. The juice extractor of claim 1, wherein a plurality
of engagement jaws are formed on a border of a lower end part
of the cover, a pluralit y of engagement projections are
formed on an outer periphery of an upper end of the housing,
and engagement hooks are formed on the drive unit;
wherein the housing that is secured to the cover by the
engagement of the engagement jaws with the engagement
projections is detachably 3ecured to the drive unit by the
engagement hooks.
7. The juice extractor of claim 1, wherein the brush
is composed of a net brush attached to an inner surface of
the brush holder to continuously sweep the outer wall of the
mesh drum, and a housing brush attached to an outer surface
of the brush holder to continuously sweep the inner wall of
the housing.


8. The juice extractor of claim 1, wherein a brush
gear is mounted on a lower part of the brush holder, and an
intermediate gear is rotatably mounted on the lower surface
or the housing to be engaged with the brush gear;
wherein the intermediate gear, which is engaged with
the screw gear, rotates the brush gear.
9. The juice extractor of claim 1, wherein a slant
surface is formed on a lower end surface of the inlet port of
the cover in the rotating direction of the screw.
10. The juice extractor of claim 3, further comprising
an elastic packing mounted on one side of the bottom surface
of the housing discharge hole, one side of the packing being
inserted into an insertion groove formed on the bottom
surface of the housing to achieve sealing, and the other side
thereof being in close ccntact with an outlet of the housing
discharge hole.
11. The juice extractor of claim 1 or 10, whrein the
cover further comprises a securing projection formed on an
outer periphery of the cover, the securing projection being
positioned in the rear under the assumption that the juice
outlet port and the draff outlet port of the housing are
positioned in the front.


12. The juice extractor of claim 11, wherein the drive
unit comprises:
a base frame in which a motor and a control device are
installed;
a housing engagement surface formed on an upper surface
of the base frame;
a polygonal shaft of the motor formed to project in the
center of the engagement surface;
a plurality of engagement hooks formed on an outer
periphery of the engagement surface to secure the housing;
a support frame having a mounting surface formed on one
side of the housing engagement surface of the base frame to
correspond to a side surface of the housing and extending
from the base frame to support the housing;
a securing groove which is formed on an upper surface
of the support frame and to which the securing projection of
the cover is secured; and
a handle unit exterding from an upper - end of a rear
surface of the housing mounting surface of the support frame
to a lower end of the base frame.
13. A juice extractor capable of extracting juice from vegetables,
fruits, or soymilk from beans, substantially as hereinbefore described
with particular reference to the accompanying drawings.

The present invention relates to a juice extractor
capable of extracting juice from vegetables, fuits or soymilk
from beans is disclosed. The extractor includes a housing having
a draff outlet port and a juice outlet port, a screw having an
upper rotary shaft inserted in a rotary shaft hole of the housing
and a lower rotary shaft with a plurality of screw spirals formed
on an outer periphery thereof, and a mesh drum for extracting the
juice toward the juice outlet port, and rotary brush mounted
between the housing and the mesh drum and having a brush holder.
Various nutrients and intrinsic flavor contained in the vegetables
or fruits are maintained to the fullest extent by employing a
very low speed screw of a squeezing mode. Also, since the housing
accommodating the screw is vertically fixed to an upper portion
of a drice unit, the material is automatically moved downward
without pressing the material down, and the draff is discharged
while squeezing and grindinc the materials put in an inlet port.
Figs. 1 & 2 of the drawings illustrate the invention.


Documents:

5077-KOLNP-2008-(08-11-2011)-CORRESPONDENCE.pdf

5077-KOLNP-2008-(15-12-2011)-CORRESPONDENCE.pdf

5077-KOLNP-2008-(15-12-2011)-FORM-3.pdf

5077-KOLNP-2008-(18-12-2012)-ABSTRACT.pdf

5077-KOLNP-2008-(18-12-2012)-CLAIMS.pdf

5077-KOLNP-2008-(18-12-2012)-CORRESPONDENCE.pdf

5077-KOLNP-2008-(18-12-2012)-DESCRIPTION (COMPLETE).pdf

5077-KOLNP-2008-(18-12-2012)-DRAWINGS.pdf

5077-KOLNP-2008-(18-12-2012)-FORM-1.pdf

5077-KOLNP-2008-(18-12-2012)-FORM-2.pdf

5077-KOLNP-2008-(18-12-2012)-OTHERS.pdf

5077-KOLNP-2008-(18-12-2012)-PETITION UNDER RULE 137.pdf

5077-kolnp-2008-abstract.pdf

5077-KOLNP-2008-CANCELLED PAGES.pdf

5077-kolnp-2008-claims.pdf

5077-KOLNP-2008-CORRESPONDENCE 1.2.pdf

5077-KOLNP-2008-CORRESPONDENCE 1.3.pdf

5077-KOLNP-2008-CORRESPONDENCE-1.1.pdf

5077-KOLNP-2008-CORRESPONDENCE. 1.4.pdf

5077-kolnp-2008-correspondence.pdf

5077-kolnp-2008-description (complete).pdf

5077-kolnp-2008-drawings.pdf

5077-KOLNP-2008-EXAMINATION REPORT.pdf

5077-kolnp-2008-form 1.pdf

5077-KOLNP-2008-FORM 18 1.1.pdf

5077-kolnp-2008-form 18.pdf

5077-kolnp-2008-form 2.pdf

5077-kolnp-2008-form 3.pdf

5077-kolnp-2008-form 5.pdf

5077-KOLNP-2008-GRANTED-ABSTRACT.pdf

5077-KOLNP-2008-GRANTED-CLAIMS.pdf

5077-KOLNP-2008-GRANTED-DESCRIPTION (COMPLETE).pdf

5077-KOLNP-2008-GRANTED-DRAWINGS.pdf

5077-KOLNP-2008-GRANTED-FORM 1.pdf

5077-KOLNP-2008-GRANTED-FORM 2.pdf

5077-KOLNP-2008-GRANTED-FORM 3.pdf

5077-KOLNP-2008-GRANTED-FORM 5.pdf

5077-KOLNP-2008-GRANTED-SPECIFICATION-COMPLETE.pdf

5077-kolnp-2008-international publication.pdf

5077-KOLNP-2008-INTERNATIONAL SEARCH REPORT & OTHERS.pdf

5077-kolnp-2008-international search report.pdf

5077-KOLNP-2008-PA 1.1.pdf

5077-kolnp-2008-pa.pdf

5077-kolnp-2008-pct priority document notification.pdf

5077-kolnp-2008-pct request form.pdf

5077-KOLNP-2008-PETITION UNDER RULE 137.pdf

5077-KOLNP-2008-PRIORITY DOCUMENT.pdf

5077-KOLNP-2008-REPLY TO EXAMINATION REPORT.pdf

5077-kolnp-2008-specification.pdf

5077-KOLNP-2008-TRANSLATED COPY OF PRIORITY DOCUMENT.pdf

abstract-5077-kolnp-2008.jpg


Patent Number 255687
Indian Patent Application Number 5077/KOLNP/2008
PG Journal Number 12/2013
Publication Date 22-Mar-2013
Grant Date 15-Mar-2013
Date of Filing 15-Dec-2008
Name of Patentee KIM, YOUNG-KI
Applicant Address 427-7, PUNGNYU-DONG, GIMHAE-SI, GYEONGSANGNAM-DO
Inventors:
# Inventor's Name Inventor's Address
1 KIM, YOUNG-KI 427-7, PUNGNYU-DONG, GIMHAE-SI, GYEONGSANGNAM-DO, 621-130
PCT International Classification Number A47J 19/06
PCT International Application Number PCT/KR2007/002087
PCT International Filing date 2007-04-27
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10-2006-0055656 2006-06-21 Republic of Korea