FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003


PROVISIONAL SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION A cost effective mounting method for parking brake cable
APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Mr. Ashesh A Shah, Mr. Sundar Kumar Palani & Mr.Umesh L Abhyankar
all Indian nationals of TATA MOTORS LIMITED,
an Indian company having its registered office at
Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention.


FIELD OF INVENTION
This invention relates to brake system used in vehicles and more particularly this is related to the parking brake cable mounting (routing) of parking brake system of an automobile.
BACKGROUND OF INVENTION
Parking brakes are generally provided in vehicle to hold in gradients and to provide an
emergency braking if required. It is also one of the regulatory requirements of a vehicle.
First end of parking brake cable is assembled with hand brake lever and second end
goes towards brake rear brake assembly.
Particularly parking brake cables are used to transmit the mechanical force from hand
brake lever to Rear brake assembly.
Routing of these parking brake cables is done through its outer sleeve by holding
clamps or fixed type of clamps on suspension member or chassis member of the
vehicle.
Function of these clamps is to hold the parking brake cable for the life time in specific
routing as per requirement.
In conventional parking brake system, the parking brake cable clamps are fixed or loose
type (for e.g. crimped clamps), which needs to be bolted on chassis member or
suspension member & it needs additional weld nut on chassis member or suspension
member (also extra bolting operation is involved during assembly of cable). Some times
instead of bolting, welded clamps are used on either chassis member or suspension
member of the vehicle.
One more disadvantage of it is additional crimping operation is required during parking
brake cable manufacturing due to presence of crimping clamp.
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Function of end connector is to assemble Parking brake cable outer sleeve with anchor
plate of brake assembly at second end.
Also in case of conventional parking brake system, brake cable end connector at second
end is assembled with anchor plate by U clip. For this groove on the parking brake
cable outer sleeve at end & an additional tube extended from anchor plate is required, to
accommodate cable inside it and slot on its periphery is also needed to locate U clip.
Because of this type of assembly, extra component such as U clip is required during
assembly and additional tube is present on the anchor plate. This leads to handling of
more number of components during assembly, hence more time.
One more disadvantage of this kind of end connection is that extra grooving operation
on the cable second end is required.
OBJECTS OF INVENTION
> The main object of this invention is flexibly secure the parking brake cable outer sleeve which assists the natural route of cable by guiding and no rigid fixing is involved.
> Yet another object is to secure the parking brake cable outer sleeve under the lateral load acting due to its bends a per routing.
> Yet another object of this invention to avoid crimping clamp on the periphery of parking brake cable outer sleeve.
> Yet another object is snap fit end connection for anchor plate of rear brake assembly and second end of parking brake cable for ease in fitment.
> Yet another object of this invention is to meet the requirement of production i.e. simple in construction, less time consuming, less weight, ease for fitment there fore easy for mass production and cost effective.
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BRIEF DESCRIPTION OF THE INVENTION
Parking brake cable outer sleeve mounting method for a vehicle in accordance with this invention basically comprises of a plastic rivet fixing clamp which is fitted on the hole of suspension member of the vehicle and through this clamp cable is routed towards the rear brake assembly. The cable is flexibly secured by guiding through this clamp. The clamp comprises of the locking member. Clamp mounting surface is flat which sits on the flat surface of suspension member through a locking arrangement. Then parking brake cable outer sleeve is mounted and guided inside the clamp. Another object of this invention is that the clamp fitment is also possible in case of the burr coming inside the hole to a certain defined depth and deburring operation for suspension member can be avoided, if burr is with in acceptable limit. The second end of the parking cable is locked with the anchor plate of brake assembly, by plastic snap fit end connection consists of male connector element, and female connector element. Male connector element is fixed on outer sleeve of parking brake cable. The male connector element is snap fitted to the female connector element to hold the parking brake cable with rear anchor plate assembly. The Snap fit end connection enables the use of hole in the anchor plate with out any additional part.
STATEMENT OF INVENTION
> A parking brake cable mounting system comprises;
a parking brake cable outer sleeve having a first and a second end; said first end connected to a mounting bracket located near parking brake lever; said second end connected to rear brake assembly; wherein said connection between second end and said brake assembly is a snap fit arrangement; and said parking brake cable
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outer sleeve flexibly secured to a chassis or suspension member of the vehicle proximal to said second end.
> System as above wherein said parking brake cable outer sleeve flexibly secured a bracket assembly.
> System as above wherein said bracket configured to withstand lateral loading on said outer sleeve;
> System as above wherein said bracket assembly having provision for locating said cable flexibly inside.
> System as above wherein said outer sleeve having a male snap fit connection element at said second end;
> System as above wherein said female snap fit connection element is locked to male connection element fixed at second end parking brake cable outer sleeve.
> System as above wherein said female connection element is snap fitted to said anchor plate.
> System as above wherein said male and female connection elements are made
from plastic.
> A parking brake cable routing system comprises;
a parking brake cable outer sleeve having a first and a second end; said first end connected to a mounting bracket located near parking brake lever; said second end connected to rear brake assembly; wherein said connection between second end and said brake assembly is a snap fit arrangement.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 shows a bottom view layout of the parking brake cable routing in the vehicle Figure 2 shows the detailed view of flexible secured parking brake cable outer sleeve through plastic clamp.
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Figure 3 shows the snap fit end connection between rear anchor plate and second end of parking brake cable, also flexibly secure parking brake cable clamp. Figure 4 a &b shows the detailed view of snap fit end connection for assembly of parking brake cable outer sleeve and anchor plate
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings where in the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
Referring to the drawing FIG. 1 and 2, the Parking brake cable is routed through chassis member(2) and suspension member (5) outside the vehicle body. The flexible securement scheme'(3) of parking brake cable outer sleeve(l) is provided by flexible securing clamp(6) in the vehicle routing, mounted on the suspension member(5). Clamp can be preferably made of plastic. First end of parking brake cable outer sleeve (1') is towards the hand brake lever end, where as the second end of parking brake cable outer sleeve(l") is towards the rear brake assembly(12). The parking brake cable second end is connected to rear brake assembly through snap fit end connection
(4).
As illustrated in FIGS. 2 Clamp (6) secure parking brake cable outer sleeve (1) and keeps it free inside the clamp (6) i.e flexibly secured (3). For mounting of the clamp (6) on the suspension member (5), hole is present on the suspension member (5), through the hole, clamp (6) is held by locking arrangement (7). The flexible securing clamp (6) has sufficient flat surface (8) resting on the suspension member, to hold the lateral load of parking brake cable sleeve (1), acting due its routing. The clamp fitment is also possible in case of the burr coming inside the hole to a certain defined depth and deburring operation for suspension member can be avoided, if burr is with in acceptable limit.
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As illustrated in FIGS. 3 the parking brake cable second end is connected to rear anchor plate(9), i.e part of rear brake assembly (12)through snap fit end connection (4). The snap fit end connection (4) consists of male connector (10), which is fixed at parking brake cable outer sleeve (1), on the periphery of male connector(10)sliding female connector (11) present. Female connector(l 1) is snap fitted in the anchor plate hole(13) to hold the parking brake cable outer sleeve(l) in desired position. FIG. 4a & 4b illustrates the detailed view of snap fit end connection (4) of parking brake cable outer sleeve (1) and anchor plate(9) of rear brake assembly(12). FIG. 4a shows the position of male connector( 10) and female connector (11) of the snap fit end connection(4) before assembly with anchor plate(9).The male connection having two locking rings(14,15)for locking to the female connector. Initially the male connector(lO), is locked with the female connector (11) about the first locking ring(14). The female end jaws (16) is located inside the hole (13) provided on anchor plate (9). On pushing the male connector (10) further, the female connector (11) is locked about the second locking ring (15) and it will open the female connector jaws(16) to snap fit with anchor plate hole(13), as shown in FIG.4b. The snap fit arrangement can be a simple male/female snap element directly fitted to the anchor plate brake assembly. The male and female elements are made of plastic or any other suitable material.
Dated this 17th day of March 2009
TATA MOTORS LIMITED By their Agent & Attorney

Karuna Goleria of DePENNING & DePENNING
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