Title of Invention

FLOOR SPRING

Abstract The invention relates to a floor spring having a housing for accommodating a closing mechanism, the housing being covered by a cover component in the region of a closing shaft (10), which supports a door or the like With the intention to create a cover component for a floor spring, which is universally usable, irrespective of the 10 circumstance whether the floor spang has a spindle or a rigid shaft, whether the cover plate (12) is fastened to the cement case (14) or to the housing of the floor spring, which does not require pre-mounting by the manufacturer and which aflows for retrofitting with an already installed 15 door, it is intended according to the invention that the cover component be formed in two parts, and consists of an essentially U-shaped base unit (1) and an insert {2} intertable into the base unrt (1)
Full Text 2003039 PC Eng
Title: Floor Spring
Description
The invention relates to a floor spring having a housing for
accommodating a closing mechanism, the housing being
5 covered by a cover component in the region of a closing
shaft, which supports a door or the like
Such floor springs are well known They present a housing
which is surrounded by a cement case, the latter being
insertable into an opening, which is recessed In the floor
10The whole cement case,including the floor spring located
therein, is covered at the top side by a cover plate, such
that just this cover plate is visible from outside As the
cover plate can not be mounted until after the door or the
like has been mounted to the floor spring and until after, for
15 example, the closing speed has been set at the floor
spring, the cover plate on the front side must present an
oblong hole extending in the longitudinal direction to allow
for mounting the cover plate to the housing of the floor
spring, past the closing shaft
20The cover plate can be fastened either to the cement case
or to the housing of the floor spring As a requirement, the
housing of the floor spring has to be adjustable within the
cement case in all four directions in-plane and in
conjunction wrth the above mentioned different fastening
25 possibilities for the cover plate at the cement case or at the

2003039 PC Eng
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housing, the cover plate ends up having oblong holes of
various sizes,
If the cover plate is fastened to the housing of the floor
spring, the plate together with the housing may perform a
5possible adjusting movement of the housing within the
cement case As a consequence, the oblong hole is
required to be large enough to allow the cover plate to be
mounted past the closing shaft
If on the other hand, the cover plate is mounted to the
10cement case, in the event of an adjusting movement, the
housing will perform a relative movement in relation to the
cover plate, as the fatter is secured to the cement case In
order to be able to guarantee the complete adjustment of
the housing in this case, the oblong hols has to be
15 increased by this additional adjusting path, as otherwise
the closing shaft could hit the cover plate
Furthermore, it is required that the oblong hole be covered
by one or more suitable cover components, to protect the
floor spring and especially a sealing, surrounding the
20 closing shaft from impurities
In practice one and the same floor spring will continue to
be used with both, a spindle and a rigid shaft, such that for
one and the same floor spring depending on the shaft
execution and fastening of the cover plate at the housing
25 or at the cement case, different cover plates will be

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required resulting in increased expenses incurred in
production and stock-keeping
In addition these components have to be partially pre-
mounted in the factory as mounting by the customer on-
site has proven to fail for many different reasons
Therefore, it is an object of the invention to create a cover
component being universally usable, regardless whether
the floor spring has a spindle or a rigid shaft, and
regardless whether the cover plate is fastened to the
10 cement case or to the housing of the floor spring, a cover
component that does not require any pre-mounting by the
manufacturer and allows for retrofitting even if the door is
already installed
This problem is solved for a floor spring of the type
15 discussed in the opening paragraphs, in that the cover
component is formed in two parts and essentially consists
of a U-shaped base unit and of an insert which is
insertable into the base unit
A universally usable cover component is provided through
20the inventive embodiment, which can be used
irrespectively of the floor spring construction, which does
not require any pre-mounting by the manufacturer and
which allows for installation even if the door is already
installed.

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The dependent claims represent further embodiments of
the inventive subject matter
According to an advantageous embodiment, it is intended
that the base unit and the insert, in the assembled
5 condition thereof, essentially have a rectangular peripheral
contour This allows for a simple and cost effective
production of both components and likewise guarantees
simplified stock-keeping
As, advantageously, the base unit essentially is evenly
10 surfaced and insertable into the insert, a cover component
is created which requires very fittie space in the mounted
condition
if, according to one advantageous embodiment, the insert
is insertable into the base unit such as to leave a circular
15 opening for the passage of the closing shaft, a spindle or a
rigid shaft can be used, depending on the requirements
Preferably, the U-shaped base unit with the open side
thereof can the slid onto the insert such as to be able to
easily and simply install the cover component around the
20 closing shaft
If, according to one advantageous embodiment, the base
unit, at the inside edges thereof which are engageable with
the insert, iS provided with concave shaped, semicircular
recesses extending in the longitudinal direction, a simple

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15
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and yet good fixing possibility for the insert at the base unit
is created
Moreover, the fixing can be improved if, according to one
advantageous further development, the insert, at the
5outside edges thereof, presents lateral wings extending to
the outside, which engage in the recesses at the inside
edges of the base unit
Advantageously, the base unit and the insert, at regions
thereof oriented towards the dosing shaft, are provided
10 with a semicircular contour, the profile thereof being
formed as a sealing lip which engages into a groove at the
closing shaft An excellent protection from penetration of
impurities is guaranteed on account of this embodiment
The sealing lip can be formed like a rotary shaft seal type
I5 In particular, according to another advantageous further
development, if the sealing lip is inclined upwards, a
pocket is created at the end of the sealing lip where
impurities can accumulate Thus, infiltration of impurities
into the floor spring can be prevented effectively
20ln order to guarantee a reliable fixing of the base unit and
the insert, according to one advantageous embodiment, it
is intended that the insert, at the rear region of the outside
edges thereof, JS provided with one opening respectively,
which is latchable with one respective latching projection
25provided at the inside edges of the base unit
Advantageously, inserting chamfers are provided at the

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base unit, to allow for easy introduction of the base unit
and the insert
According to one preferred further development, the insert:
and the base unit, at the ends turned away from the
5 closing shaft, are provided with predetermined breaking
points Thus the possibility is provided to simply adapt the
length of the base unit und insert to local conditions
Advantageously, the insert has a smaller thickness than
the base unit On account of this simple design, it is
10 possible to clamp the base unit and insert with a single
screw, as, due to the thinner insert, the latter will clamp the
base unit when tightening the screw
Preferably the inventive cover component will be
manufactured as injection-moulded part from plastic
15 material, such as POM This guarantees a simple and
cost effective production even with large quantities
Further characteristics and advantages of the inventive
cover component will result from the following description
of one preferred exemplary embodiment, in which
20 Figure 1 shows a top view on the inventive base unit,
Figure 2 shows a lateral view of the inventive base
unit.
Figure 3 shows a section through the inventive base
unit along line A-A of Figure 1,

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Figure 4 shows a rear view of the inventive base unit,
Figure 5 shows the detail Z of Figure 3,
Figure 6 shows the detail W of Figure 4,
Figure 7 shows a view from below of the inventive
5 base unit,
Figure 8 shows the detail Y of Figure 7,
Figure 9 shows a top view on the inventive insert;
Figure 10 shows a view frorn below of the inventive
insert,
10 Figure 11 shows a front view of the inventive insert,
Figure 12 shows a cross-section through the inventive
insert along line B-B of Figure 9,
Figure 13, shows the detail X of Figure 11,
Figure 14 shows a top view on the base unit, from
15 above, with the insert being inserted
Figure 15 shows a rear view of the base unit with the
insert being inserted.
Figure 16 shows a top view on a floor spring, the base
unit, the insert and the cover plate being
20 installed;

2003039 PC Eng
8
Figure 17-20 show different states during mounting of the
base unit, insert and cover plate
The inventive cover component consists of a base unit 1
and an insert Z The base unit 1 is illustrated in a variety
5 of views in Figures 1 to 6, whereas the insert 1 is shown in
a variety of views in Figures 9 to 13
In the following, the base unit 1 will be described first The
base unit 1 is produced for example by injection moulding
from plastic material, eg. POM It is formed as an
10 essential planar plate having an oblong opening on one
side, which results in an essentially U-shaped form, when
seen in a top view At the inside edges of the opening, the
base unit 1 is respectively provided with concave shaped,
semicircular recesses 3 extending in longitudinal direction
I5 of the opening, The front side of the opening terminates in
a semicircular contour 4, when seen in a top view The
contour 4 is provided with a sealing lip 5 oriented to the
inside and inclined upwards (compare Figure 5) The
sealing lip 5, which in profile can be formed like a rotary
20 shaft seal, engages into a non-illustrated groove of a
closing shaft 10 of the floor spring and thus prevents
impurities from infiltrating In the rear region on each side,
at the inside edges of the opening in the base unit 1,
respectively one latching projection 8 is provided
25 Moreover, inserting chamfers 11, facilitating the assembly
of the base unit 1 and the insert 2, are disposed at the
inside edges of the opening. For adapting the length of

2003039 PC Eng
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base unit 1 to the respective conditions, the base unit 1, at
the free end thereof, is provided with predetermined
breaking points 16 whtch allow for an easy shortening of
the legs of the base unit 1
5 The insert 2, inserteble into the base unit 1, is illustrated in
Figure 9 to 13 Like the base unit 1, it consists of an
injection-moulded part, for example made from POM, and
essentially presents a rectangular shape with s
semicircular contour 4a at one narrow side The insert 2,
10 at the outside edges thereof, is provided with wings 6
extending to the outside, which are engageable with
recesses 3 at the inside edges of the base unit 1 The
wings' 6 contour is such that they fit into the recesses 3
Through the cooperation between the recesses 3 at the
15 base unit 1 and the wings 6 at the insert 2, a reliable fixing
of the both components can be achieved The semicircular
contour 4a at the narrow side of the insert 2 forms a
sealing lip 5a , and the form thereof matches the contour 4
of the sealing lip 5 at the base unit 1 An opening 7 is
20 provided in the region of the wings 6 in an end portion of
the insert 2, which opening, for latching between the base
unit 1 and the insert 2, can engage with the latching
projections 8 at the base unit 1, and thus prevents mutual
displacement of the two components Moreover,
25 predetermined breaking points 16a are provided at the
insert 2 allowing for adapting the length to the local
conditions as with the base unit 1

2003039 PC Eng
35
-10-
The cover component consisting of base unit 1 and insert 2
is shown in the assembled state in Figures 14 and 15 The
recesses 3 at the base unit 1 are engaged with the wings 6
at the insert 2 and the semicircular contours 4 and 4a
5 leave an open space for the passage of the closing shaft
10 As can be also seen in Figure 15, the insert 2 has a
smaller height than the base unit 1 resulting in a height
difference h, the purpose thereof being explained later in
conjunction with the Figures 17 to 20
10 Figure 16 shows a top view on the completely mounted
floor spring, the door has been omitted, for clarity's sake
The not visible floor spring is covered by a cover plate 12
and extends with the closing shaft 10 thereof through the
cover component, consisting of base unit 1 and insert 2.
15 The insert 2 of the cover component is fastened to the
housing of the floor spring by means of a screw 9 and,
through the height difference h, already mentioned,
between the base unit 1 and the insert 2, clamps the whole
cover component
20 Now the installation of the cover component will be
explained in conjunction with Figures 17 to 20 When
installing the cover component, a closer housing 15 of the
floor spring is fixed at the bottom of a cement case 14 and
aligned therewith
25 First the insert 2, as shown in Figure 17, for example
inclined from the top right side, is slid close to the closing

2003039 PC Eng
40 -11-
shaft 10 and pivoted to the left in a circular arc-like
movement, as indicated by the arrow in Figure 17, until the
insert 2 is aligned parallel to the closer housing 15 Then,
the insert 2 is preliminary fixed to the closer housing 15
swith the screw 9 At this time the screw 9 will not be
tightened, ie the insert 2 can still be moved and displaced
in height Subsequently, the base unit 1 will be slid onto
the insert 2, whereby the recesses 3 will engage with the
wings 6 At the end of the inserting movement, the
10atching projections a at the base unit 1 snap into openings
7 at the insert 2 and thus fix base unit 1 and insert 2
together to form one unit After the base unit 1 has
snapped into the insert 2, the screw 9 iS tightened and
therefore the base unit 1 is clamped above the insert 2, A
15 defined clamping of the cover component is achieved
through the height difference h between the base unit 1
and the insert 2, As the insert 2 rs less high than the base
unit 1, the insert 2 fs pushed downwards and thus
simultaneously clamps the base unit 1, when tightening the
20 screw 9 After tightening of the screw 9, the cover plate 12
will be slid under the cover component and fastened to the
cement case 14, respectively to the closer housing 15 with
attachment screws 13
As established in the above description, smooth mounting
25will be possible even with an already installed door
Likewise, a universal application of the inventive cover
component with both spindles and rigid shafts is made

2003039 PC Eng
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available, as well as fastening the cover plate 12 at the
cement case 14 or at the closer housing 15
References
1 base unit
2 insert
3 recesses
4,4a semicircular contour
5, 5a sealing lip
6 wings
107 opening
8 latching projection
9 screw
10 closing shaft
11 inserting chamfer
15 12 cover plate
13 attachment screw
14 cement case
15 closer housing
16r 16a predetermined breaking points
20h height difference
Patent claims
1 A floor spring having a housing for
accommodating a closing mechanism, the
housing being covered by a cover component in
25 the region of a closing shaft, which supports a
door or the like, characterized in that the cover

2003039 PC Eng
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component is formed in two parts and consists of
an essentially U-shaped base unit (1), as well as
of an insert (2) insertable into the base unit (1)
2 A floor spring according to claim 1. characterized
5 in that the base unit (1) and the insert (2), in the
assembled condition, essentially present a
rectangular peripheral contour
3 A floor spring according to the preceding claims,
characterized in that the base unit (1) essentially
10 is evenly surfaced and intertable into the insert
4 A floor spring according to the preceding claims,
characterized in that the insert (2) is insertable
into the base unit (1) such that a circular opening
15 is left for the passage of the closing shaft (10)
5 A floor spring according to the preceding claims,
characterized rn that the U-shaped base unit (1)
with the open side thereof can be slid onto the
insert (2)
206 A floor spring according to the preceding claims,
charactenzed in that the base unit (1), at the
inside edges thereof engageable with the insert
(2), is provided with concave shaped, semicircular
recesses (3) extending in the longitudinal
25 direction

2003039 PC Eng
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7 A floor spring according to the preceding claims,
characterized in that the insert (2), at the outside
edges thereof, presents wjngs (6) laterally
extending to the outside, which engage into the
5 recesses (3) at the inside edges of the base unit
(1)
8. A floor spring according to the preceding claims,
characterized to that the base unit (1) and the
insert (2), at the portions thereof oriented towards
10 the closing shaft (10) are provided with a
semicircular contour (4, 4a), the profile thereof
being formed as a sealing up (5, 5a) engaging
into a groove at the closing shaft (10)
9 A floor spring according to the preceding claims,
15 characterized in that the sealing lip (5, 5a) is
inclined upwards.
10 A floor spring according to the preceding claims,
characterized in that the insert (2), at the rear
portion of the outside edges thereof, has one
20 opening (7) respectively, which is latchable with
respectively one latching projection (8) provided
at the inside edges of the base unit (1)
11 A floor spring according to the preceding claims,
characterized in that the base unit (1) is provided
25 with inserting chamfers (11)

2003039 PC Eng
55
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12 A floor spring according to one or more of the
preceding claims, characterized in that the insert
(2) and the base unit (1), at the ends thereof
turned away from the closing shaft (10), are
5 provided with predetermined breaking points (16,
16a)
13 A floor spring according to one or more of the
preceding claims, characterized in that the insert
(2) has a smaller thickness than the base unit (1)
10 14 A floor spring according to one or more of the
preceding claims, characterized in that the base
unit (1) and the insert (2) are made from plastic
material, e g. POM

The invention relates to a floor spring having a housing for
accommodating a closing mechanism, the housing being
covered by a cover component in the region of a closing
shaft (10), which supports a door or the like With the
intention to create a cover component for a floor spring,
which is universally usable, irrespective of the
10 circumstance whether the floor spang has a spindle or a
rigid shaft, whether the cover plate (12) is fastened to the
cement case (14) or to the housing of the floor spring,
which does not require pre-mounting by the manufacturer
and which aflows for retrofitting with an already installed
15 door, it is intended according to the invention that the cover
component be formed in two parts, and consists of an
essentially U-shaped base unit (1) and an insert {2}
intertable into the base unrt (1)

Documents:

00342-kolnp-2006-abstract.pdf

00342-kolnp-2006-claims.pdf

00342-kolnp-2006-description complete.pdf

00342-kolnp-2006-drawings.pdf

00342-kolnp-2006-form-1.pdf

00342-kolnp-2006-form-3.pdf

00342-kolnp-2006-form-5.pdf

00342-kolnp-2006-international publication.pdf

342-KOLNP-2006-ABSTRACT.pdf

342-KOLNP-2006-AMANDED CLAIMS.pdf

342-KOLNP-2006-ASSIGNMENT.1.3.pdf

342-kolnp-2006-assignment.pdf

342-KOLNP-2006-CORRESPONDENCE-1.1.pdf

342-KOLNP-2006-CORRESPONDENCE.1.3.pdf

342-kolnp-2006-correspondence.pdf

342-KOLNP-2006-DESCRIPTION (COMPLETE).pdf

342-KOLNP-2006-DRAWINGS.pdf

342-KOLNP-2006-ENGLISH TRANSLATION.pdf

342-KOLNP-2006-EXAMINATION REPORT REPLY RECIEVED.pdf

342-KOLNP-2006-EXAMINATION REPORT.1.3.pdf

342-KOLNP-2006-FORM 1.1.3.pdf

342-KOLNP-2006-FORM 1.pdf

342-KOLNP-2006-FORM 13-1.1.pdf

342-KOLNP-2006-FORM 13-1.2.pdf

342-KOLNP-2006-FORM 13-1.3.pdf

342-KOLNP-2006-FORM 13.1.3.pdf

342-kolnp-2006-form 13.pdf

342-KOLNP-2006-FORM 18.1.3.pdf

342-kolnp-2006-form 18.pdf

342-KOLNP-2006-FORM 2.pdf

342-KOLNP-2006-FORM 26.1.3.pdf

342-kolnp-2006-form 26.pdf

342-KOLNP-2006-FORM 3.1.3.pdf

342-KOLNP-2006-FORM 3.pdf

342-KOLNP-2006-FORM 5.1.3.pdf

342-KOLNP-2006-FORM 5.pdf

342-KOLNP-2006-FORM-27.pdf

342-KOLNP-2006-GPA.1.3.pdf

342-kolnp-2006-gpa.pdf

342-KOLNP-2006-GRANTED-ABSTRACT.pdf

342-KOLNP-2006-GRANTED-CLAIMS.pdf

342-KOLNP-2006-GRANTED-DESCRIPTION (COMPLETE).pdf

342-KOLNP-2006-GRANTED-DRAWINGS.pdf

342-KOLNP-2006-GRANTED-FORM 1.pdf

342-KOLNP-2006-GRANTED-FORM 2.pdf

342-KOLNP-2006-GRANTED-LETTER PATENT.pdf

342-KOLNP-2006-GRANTED-SPECIFICATION.pdf

342-kolnp-2006-intenational publication.pdf

342-kolnp-2006-international search report.pdf

342-KOLNP-2006-OTHERS-1.1.pdf

342-KOLNP-2006-OTHERS.1.3.pdf

342-KOLNP-2006-OTHERS.pdf

342-KOLNP-2006-PA.pdf

342-kolnp-2006-pct priority document notification.pdf

342-kolnp-2006-pct request form.pdf

342-KOLNP-2006-PETITION UNDER RULE 137.pdf

342-KOLNP-2006-REPLY TO EXAMINATION REPORT.1.3.pdf

abstract-00342-kolnp-2006.jpg


Patent Number 248787
Indian Patent Application Number 342/KOLNP/2006
PG Journal Number 34/2011
Publication Date 26-Aug-2011
Grant Date 24-Aug-2011
Date of Filing 16-Feb-2006
Name of Patentee DORMA GMBH + CO. KG
Applicant Address BRECKERFELDER STRASSE 42-48, 58256 ENNEPETAL, GERMANY
Inventors:
# Inventor's Name Inventor's Address
1 GOSCH STEPHAN MEIEREISTRASSE 11, 23738 KOSELAU, GARMANY
2 BIENEK VOLKER RUTLISTRASSE 22, 44143 DORTMUND, GERMANY
PCT International Classification Number E05F 3/00
PCT International Application Number PCT/EP2004/008928
PCT International Filing date 2004-08-10
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 103 39 333.1 2003-08-25 Germany