Title of Invention	AN AUTOMATIC BRAKE ADJUSTER FOR ADJUSTING THE SLACK BETWEEN THE BRAKE LINING AND BRAKE DRUM OF A VEHICULAR BRAKING SYSTEM
Abstract	An Automatic Brake Adjuster for adjusting the slack between brake lining and brake drum of a vehlcu\ar braking system as per the invention comprises mainly of a body (1) conrJectable to a br~ke actuator. A clutch mechanism wherein a clutch worm wheel (6) forms a clutch with rotatable worm shaft (4) by mutually engageable serrations, the said worm shaft(4) meshing with a worm wheel(3) but perpendicular to its axis, the said clutch worm wheel(6) retained against a heavy compression spring (9), which is preset to a desired load. A control arm assembly including a rotatable control arm(13) with a fixing portion(13) secured to a vehicle chassis to provide a reference point and a control gear wheel(12) with circumferential teeth also Located in the bore of the worm wheel(J) but integral with control arm(13). A p1nton assembly comprising a ratchet(16) and pin type pawl(26) mechanism between a plnton and ratchet(16) and pawl housing(28) acts as a one-way lock, wherein the stepped faces of pawl housing(28) is engageable with, stepped faces of control worm screw(19), wherein the gap(G) between stepped faces ensure radial clearance and desired slack i.e clearance stroke.

Title of Invention

AN AUTOMATIC BRAKE ADJUSTER FOR ADJUSTING THE SLACK BETWEEN THE BRAKE LINING AND BRAKE DRUM OF A VEHICULAR BRAKING SYSTEM

Abstract

An Automatic Brake Adjuster for adjusting the slack between brake lining and brake drum of a vehlcu\ar braking system as per the invention comprises mainly of a body (1) conrJectable to a br~ke actuator. A clutch mechanism wherein a clutch worm wheel (6) forms a clutch with rotatable worm shaft (4) by mutually engageable serrations, the said worm shaft(4) meshing with a worm wheel(3) but perpendicular to its axis, the said clutch worm wheel(6) retained against a heavy compression spring (9), which is preset to a desired load. A control arm assembly including a rotatable control arm(13) with a fixing portion(13) secured to a vehicle chassis to provide a reference point and a control gear wheel(12) with circumferential teeth also Located in the bore of the worm wheel(J) but integral with control arm(13). A p1nton assembly comprising a ratchet(16) and pin type pawl(26) mechanism between a plnton and ratchet(16) and pawl housing(28) acts as a one-way lock, wherein the stepped faces of pawl housing(28) is engageable with, stepped faces of control worm screw(19), wherein the gap(G) between stepped faces ensure radial clearance and desired slack i.e clearance stroke.

Full Text	Field of Invention: This invention relates to an automatic Brake Adjuster wherein one- way lock mechanism with spring loaded pin type pawl and ratchet arrangement in the prior assembly with control worm screw is utilized for adjusting the slack between the brak lining brake drum of a vehicular breaking system. According to the clearance principle which is claimed as an advanced system, the adjustment mechanism is able to sense various factors such as It is another object of the invention to provide a highly reliable automatic brake which is a safely device to be capable of working under extremely bad environmental conditions and also mender severe load AND VINRATION CONDITIONS OVERCOMING THE LIMITATION ON SPACE AVAILABILITY Description of invention as per preferred embodiments:- during the brake application stroke to reduce the wear and thereby increase the life of the parts. An Automatic Brake Adjuster for adjusting the slot between brake LINIGN AND BRAKE DRUM OF A VEHICULAR BRAKING SYSTEM AS PER THE INVENTION comprised mainly of following: When the brake is released, the pinion and ratchet(16) is rotated in clockwise direction by the control gear wheel (12), opposite to the direction located in the bore of or wheel(3) and integral with the control arm(13), between brake shoe and brake drum known a clearance stroke of Automatic brake adjuster, also assumed to be covered in the specification of the invention and in the claims made in the invention. WE CLAIM:- 1. An Automatic Brake Adjuster for adjusting the slack between brake lining and brake drum of a vehicular braking system comprising: 2. An Automatic Brake Adjuster for adjusting the slack between brake lining and brake drum of vehicuular braking system comprising: wherein the heavy compression spring (9) exerts load onto the worm shaft(4) so as to ensure the engagement of the clutch, wherein pinion assembly includes ratchet and spring loaded pin type pawl mechanism between and ratchet and pawl housing engage able with control worm screw.

Full Text

Field of Invention:
This invention relates to an automatic Brake Adjuster wherein one-
way lock mechanism with spring loaded pin type pawl and ratchet
arrangement in the prior assembly with control worm screw is utilized for adjusting the slack between the brak
lining brake drum of a vehicular
breaking system.

According to the clearance principle which is claimed as an advanced
system, the adjustment mechanism is able to sense various factors such as

It is another object of the invention to provide a highly reliable
automatic brake which is a safely device to be capable of working

under extremely bad environmental conditions and also mender severe load
AND VINRATION CONDITIONS OVERCOMING THE LIMITATION ON SPACE AVAILABILITY

Description of invention as per preferred embodiments:-
during the brake application stroke to reduce the wear and thereby increase
the life of the parts.

An Automatic Brake Adjuster for adjusting the slot between brake
LINIGN AND BRAKE DRUM OF A VEHICULAR BRAKING SYSTEM AS PER THE INVENTION
comprised mainly of following:

When the brake is released, the pinion and ratchet(16) is rotated in
clockwise direction by the control gear wheel (12), opposite to the direction

located in the bore of or wheel(3) and integral with the
control arm(13),

between brake shoe and brake drum known a clearance stroke
of Automatic brake adjuster,

also assumed to be covered in the specification of the invention and in the
claims made in the invention.

WE CLAIM:-
1. An Automatic Brake Adjuster for adjusting the slack between brake
lining and brake drum of a vehicular braking system comprising:

2. An Automatic Brake Adjuster for adjusting the slack between brake
lining and brake drum of vehicuular braking system comprising:

wherein the heavy compression spring (9) exerts load onto the
worm shaft(4) so as to ensure the engagement of the clutch,

wherein pinion assembly includes ratchet and spring loaded pin type
pawl
mechanism between and ratchet and pawl housing engage able with
control worm screw.

Documents:

131-che-2004-abstract.pdf

131-che-2004-claims dublicate.pdf

131-che-2004-claims original.pdf

131-che-2004-correspondnece-others.pdf

131-che-2004-correspondnece-po.pdf

131-che-2004-description(complete) dublicate.pdf

131-che-2004-description(complete) original.pdf

131-che-2004-drawings.pdf

131-che-2004-form 1.pdf

131-che-2004-form 19.pdf

131-che-2004-form 26.pdf

131-che-2004-form 3.pdf

131-che-2004-form 5.pdf

131-che-2004-pct.pdf

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Patent Number

204321

Indian Patent Application Number

131/CHE/2004

PG Journal Number

26/2007

Publication Date

29-Jun-2007

Grant Date

13-Feb-2007

Date of Filing

19-Feb-2004

Name of Patentee

M/S. MADRAS ENGINEERING INDUSTRIES PRIVATE LIMITED

Applicant Address

NO.14, SATHYANARAYANA AVENUE, CHENNAI 600 028.

Inventors:

#	Inventor's Name	Inventor's Address
1	SEENIAPPAN MANIPANDIAN	C-6, INDUSTRIAL ESTATE, AMBATTUR, CHENNAI-600058

PCT International Classification Number

F16D 65/60

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA