FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See Section 10; rule 13)
TITLE OF THE INVENTION Collapsible Gear Shift Lever Mechanism
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. Pavan Sudhakar Sindgikar,
Mr. Narayan Dattatraya. Jadhav,
And Mr. K. Gopalakrishna
All are 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 particularly describes the invention and the manner in which it is to be performed.


FIELD OF INVENTION
This invention relates to cabin floor mounted gear shifting lever and more particularly it relates to collapsible gear shift lever mechanism.
BACKGROUND OF INVENTION
Conventional gear shift lever mechanism consists of rigid lever i.e. straight solid rod welded to the yoke and fastened to the cabin floor mounted bracket. The said conventional arrangement just suffices the basic purpose of gear shifting. Moreover, the said mechanism restricts the free space in the cabin by acting as an obstacle.
OBJECTS OF INVENTION
> The main object of this invention is to provide collapsible gear shift lever mechanism.
> Another object of this invention is to provide collapsible gear shift lever mechanism which increases the cabin free space by providing compact collapsible gear shift lever mechanism.
> Yet another object of this invention is to provide collapsible gear shifting lever mechanism which is simple in construction and cost effective.
STATEMENT OF INVENTION
Collapsible gear shift lever mechanism comprises gear shift yoke , gear shift lever mounting bracket, sleeve member slidably mounted on said gear shift yoke, gear shift lever connected to said gear shift yoke, pivot pin for connecting said
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gear shift lever to said gear shift yoke and resilient means disposed concentrically inside the said sliding sleeve, wherein said resilient means housed inside sleeve member keeps said sliding sleeve in downward position by resilient force in downward direction such that upward movement of sleeve member releases the pivot point enabling said gear shift lever to collapse horizontally in either forward or backward direction to create the free space inside the cabin of vehicle.
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said gear shift yoke, gear shift lever and sliding sleeve are disposed concentrically.
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said resilient means is compression spring.
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said sliding sleeve is cylindrical sleeve
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said cylindrical sleeve is hollow sleeve.
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said gear shift yoke is connected to gear shift mounting bracket preferably by welding.
Collapsible gear shift lever mechanism, in accordance with this invention, wherein said sliding sleeve comprises resting means circumferentially on inner surface for facilitating the resting surface for resilient means and stopper for sliding sleeves which enables to rests said sliding sleeve when pressed downwardly by spring force on the top portion of said gear shift yoke.
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Collapsible gear shift lever mechanism, in accordance with this invention, wherein upper portion of said gear shift yoke comprises slot and hole arrangement for connecting the lower portion of said gear shift lever with the help of pivot pin at pivot point for facilitating the degree of movement to the said gear shift lever horizontally either in forward or backward direction.
A vehicle comprising a collapsible gear shift lever mechanism, in accordance with this invention.
BRIEF DESCRIPTION OF DRAWINGS
Figure-01: shows sectional front view of the collapsible gear shift lever
mechanism in accordance with this invention. Figure-02: shows gear shift lever mounting bracket part drawing. Figure-03: shows gear shift lever part drawing.
Figure-04: shows sleeve member, pivot pin and gear shift yoke part drawing Figure-05: show top view of gear shifter assembly
BRIEF DESCRIPTION OF INVENTION
In accordance with this invention collapsible gear shift lever mechanism comprises gear shift yoke (1), gear shift lever mounting bracket(2),sliding sleeve(3), gear shift lever(4), pivot pin (5) and resilient means(6) such as compression spring.
Lower portion of said Gear shift yoke (1) is connected to gear shift lever mounting bracket (2) preferably by welding wherein said bracket (2) is fastened to the cabin floor mounted gear shifting lever assembly supporting bracket. Upper portion of said gear shift yoke (1) comprises slot and hole arrangement for connecting the lower portion of said gear shift lever (4) for facilitating the degree of movement to the said gear shift lever.
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Upper portion of said Gear shift yoke(l) is connected to the gear shift lever (4) at slot provided therein with the help of pivot pin (5) which acts as pivot point for collapsing the said shift lever (4).
Normally, the gear shift lever is erected in vertical upward direction. To keep the said gear shift lever (4) in vertical position as well as enable it to perform it's desired function of gate and gear selection, a locking arrangement is provided on said gear shift lever (4) which comprises of sliding sleeve(3) loaded with resilient means (6) disposed concentrically inside said sliding sleeve (3). Said resilient means (6) always keeps the said sliding sleeve (3) in downward position by maintaining the constant resilient force on the said sleeve in downward direction.
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein 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 figure-01 to 04 , In accordance with this invention collapsible gear shift lever mechanism comprises gear shift yoke (1), gear shift lever mounting bracket(2),sliding sleeve(3), gear shift lever(4), pivot pin (5) and resilient means(6).
Lower portion of said Gear shift yoke (1) is connected to gear shift lever mounting bracket (2) preferably by welding wherein said bracket (2) is fastened to the cabin floor mounted gear shifting lever assembly supporting bracket.
Said collapsible gear shift lever mechanism comprises gear shift yoke (1), gear shift lever mounting bracket(2), sleeve member (3) slidably mounted on said gear shift yoke(l) , gear shift lever (4) connected to said gear shift yoke (1), pivot pin (5) for connecting said gear shift lever (4) to said gear shift yoke (1) and resilient means (6) disposed concentrically inside the said sliding sleeve (3), wherein said
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resilient means (6) housed inside sleeve member (3) keeps said sliding sleeve in downward position by resilient force in downward direction such that upward movement of sleeve member (3) releases the pivot point enabling said gear shift lever (4) to collapse horizontally in either forward or backward direction to create the free space inside the cabin of vehicle.
Wherein said gear shift yoke (1), gear shift lever (4) and sliding sleeve(3) are disposed concentrically. The said resilient means is compression spring (6). The said sliding sleeve (3) is hollow cylindrical sleeve.
Upper portion of said gear shift yoke (1) comprises slot and hole arrangement for connecting the lower portion of said gear shift lever (4) with the help of pivot pin (5) at pivot point for facilitating the degree of movement to the said gear shift lever (4) horizontally either in forward or backward direction.
Upper portion of said Gear shift yoke(l) is connected to the gear shift lever (4) at slot provided therein with the help of pivot pin (5) which acts as pivot point for collapsing the said gear shift lever (4).
Normally, the gear shift lever (4) is erected in vertical upward direction. To keep the said gear shift lever (4) in vertical position as well as enable it to perform it's desired function of gate and gear selection, a locking arrangement is provided on said gear shift lever (4) which comprises of sliding sleeve(3) loaded with resilient means (6) disposed concentrically inside said sliding sleeve (3). Said resilient means (6) always keeps the said sliding sleeve (3) in downward position by maintaining the constant spring force on the said sliding sleeve (3) in downward direction.
Said sliding sleeve (3) comprises resting means circumferentially on inner surface which facilitates the resting surface for resilient means (6) as well as the stopper means for sliding sleeves which enables to rests said sliding sleeve when pressed downwardly by spring force on the top portion of said gear shift yoke (1).
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During the assembly of gear shift lever (4) and gear shift yoke(l), said sliding sleeve (3) is moved along the center axis of gear shift lever(4) against the resilient means(6) force in vertically upward direction till pivot pin point of said gear shift lever (4) comes out of the sliding sleeve(3). Centre axis of gear shift lever (4) is aligned with pivot point of gear shift yoke (1) and the pivot pin (5) is inserted to allow two degree of freedom to collapse the said gear shift lever (4) horizontally either in forward or backward direction.
In normal working, gear shift lever (4) is erected vertically in upward directions by keeping sliding sleeve (3) in downward direction by applying compression force through resilient means(6) which ultimately restricts the movement of gear shift lever(4) horizontally either in forward or backward direction.
Whenever it is requires to collapse the gear shift lever (4) horizontally either in forward or backward direction, the resilient means (6) loaded sliding sleeve (3) is moved along the neutral axis of said gear shift lever (4) in vertically upward direction against the spring force of resilient means(6) till said sliding sleeve releases the said pivot point of said gear shift lever (4) enabling the free fall of said gear shift lever (4) horizontally either in forward or backward direction. Once the sliding sleeve (3) comes out of pin pivot point (5) thereby allowing degree of freedom to collapse the gear shift lever (4) horizontally either in forward or backward direction such that it overcomes the restriction of free space in the cabin of a vehicle which in turns does one more value addition in the gear shift lever (4) apart from it's main function.
For again using the gear shift lever for function of gear gate and gear selection, or to normalize the collapsed gear shift lever (4) in vertically upward direction, gear shift lever is pulled in upward direction by which resilient means (6) releases the spring energy by pushing the sliding sleeve (3) slides in the downward direction thereby covering the pin pivot point (5) of gear shift lever (4) which will restrict the degree of freedom to collapse the gear shift lever in forward or backward
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direction and enables to perform its desired function of gear gate and gear selection of the vehicle gear box smoothly.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

WE CLAIM
1. A collapsible gearshift mechanism comprising:
a gear shift yoke;
a gear shift lever mounting bracket, said gear shift lever being pivotably
connected to said gear shift yoke;
a sleeve member slidably mounted on said gear shift lever; and
resilient means disposed inside said sliding sleeve concentric to said gear
shift lever to retain said sliding sleeve in a downward position such that upward
movement of said sleeve member enables said gear shift lever to collapse
horizontally forward or backward.
2. The collapsible gearshift mechanism as claimed in claim 1, wherein said gear shift yoke, gear shift lever and sliding sleeve are disposed concentric to each other.
3. The collapsible gearshift mechanism as claimed in claim 1, wherein said sliding sleeve is a hollow cylindrical sleeve.
4. The collapsible gearshift mechanism as claimed in claim 1, wherein said sliding sleeve comprises resting means provided circumferentially on inner surface of said sliding sleeve; and a stopper for resting said sliding sleeve when pressed downwardly by resilient force on top portion of said gear shift yoke.
5. The collapsible gearshift mechanism as claimed in claim 1, wherein upper portion of said gear shift yoke comprises a slot and hole arrangement for pivotably connecting the lower portion of said gear shift lever to enable movement of said gear shift lever horizontally forward or backward.
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6. A vehicle comprising a collapsible gearshift mechanism as claimed in the preceding claims.
7. A collapsible gearshift mechanism as hereinabove described with reference to the accompanying drawings.
Dated this 13th day of February 2009
TATA Motors Limited By their Agent & Attorney

(Karuna Goleria) of De PENNING & De PENNING
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