FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See Section 10; rule 13)
TITLE OF THE INVENTION A Multipurpose Universal Seating Buck or Vehicle Interior Model
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
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention and the manner in which it
is performed.

FIELD OF INVENTION
This invention relates to the method of manufacturing a multipurpose universal seating buck which can accommodate all type of passenger cars and commercial vehicles.
PRIOR ART
Seating buck is a very initial process of making vehicle interiors of a new model based on the initial stages of design & styling. Seating bucks are used to give an idea about the interior space, ergonomics, seating arrangements, ingress and egress of the vehicle, the vehicle height, seat locations & 'H' point of the seats, leg space, head room, luggage space etc.
The conventional method of making a seating buck is;
The floor panel of the vehicle is made with suitable material. All around the
periphery of the floor panel, steel tubes of the desired diameter are bent as per the
sections provided in the design. There are several tubes bent as per the drawing. All
these steel tubes are placed along the length of the new model and welded to the
floor to make interior sheet metal body. As per the drawing, a structure of steel
tubes is made for the front & the rear portion of the vehicle.
Various aggregates as listed below, required for the buck are then fitted at the
desired locations.
1. The seats are mounted at the locations created on the floor.
2. The controls; accelerator, break and clutch are fitted on the front tubular structure at the desired location.
3. The steering column is fitted on the front tubular structure.
4. Hand break and gear shift lever fitted at desired location.
5. The roof is mounted which gets a fixed head room.
The complete structure welded to the floor makes it rigid and cannot be adjusted for
different sizes. The above aggregates are bolted or welded to the structure due to
which they cannot be made movable.
Disadvantages in conventional methods:
1. The seating buck can be used only for a specific model.

2. Time consuming process, as the same process has to be repeated for every new model.
3. Costly process for making different bucks for different models.
4. Wastage of resources for making different seating bucks.
5. The feel of the actual vehicle interior is not achieved.
6. Not possible to view the design intent seating buck.
7. Fine adjustments of different aggregates not possible.
8. Difficult to finalize the design due to rigid body & aggregates.
SUMMARY OF THE INVENTION
Objective of present method:-
To develop a multipurpose universal seating buck which can accommodate all type
of passenger cars and commercial vehicles which,
a) Can be used for all types of models,
b) Save manufacturing process time of the buck,
c) Reduce manufacturing cost as the buck is common for different variants.
d) Common major aggregates of the vehicle hence can be used for all type of models.
e) Easy to assemble.
f) Create a good appearance of the assembly
g) To give the actual feel of the vehicle interiors.
h) Provision for fine adjustments is made for all aggregates due to which the concept & design can be easily finalized.
The above objective is achieved by manufacturing a multipurpose universal seating buck. This buck consists of major aggregates as listed below which shall be common for all types of models in passenger cars and commercial vehicles:
1. Adjustable common base
2. Adjustable roof
3. Adjustable 'B' pillar
4. Adjustable Steering column mechanism
5. Adjustable Controls (accelerator, brake, clutch) mechanism
6. Adjustable Gear shift unit

7. Adjustable parking brake unit
8. Adjustable seat mechanism.
9. Adjustable door pull mechanism on the door panel.
10. Adjustable grab handles
STATEMENT OF INVENTION
Accordingly the present invention provides a multipurpose universal seating buck
comprising
adjustable controlling units such as steering, pedals, parking brake and gear shift
unit to move and position the units in desired directions and locations;
adjustable vehicle body components such as roof and B pillar for locating said
components at different positions;
adjustable vehicle base for varying the width of the seating buck;
mechanisms for adjusting seating positions and
an adjustable grab handle.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 (a) & 1 (b) shows the complete assembly of the universal seating buck
with different adjustable aggregates assembled.
Figure 2, 2(a) & 2(b) shows the details of the common base with adjustable
mechanism.
Figure 3 shows the details of the Adjustable Steering column mechanism
Figure 4 shows the details of the Adjustable Controls (accelerator, brake, clutch)
mechanism
Figure 5 shows the details of the adjustable parking brake unit
Figure 6 shows the details of the adjustable Gear shift unit
Figure 7 shows the details of the adjustable 'B' pillar
Figure 8 (a) & 8 (b) shows the details of the adjustable front row seat mechanism.
Figure 9 (a) & 9 (b) shows the details of the adjustable roof
Figure 10 shows the details of the adjustable door pull mechanism on the door
panel.
Figure 11 shows the details of the adjustable grab handle mechanism.

DETAILED DESCRIPTION OF THE 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
The following steps are followed to manufacture a multipurpose universal seating
buck;
Figure 1 (a) & (b) shows the complete assembly of the seating buck.
Different adjustable mechanisms like adjustable base (2), adjustable steering
column mechanism (3), adjustable control unit (4), adjustable parking brake unit
(5), adjustable gear shift unit (6), adjustable B pillar unit (7), adjustable front row
seat (8), adjustable roof (9), adjustable door pull mechanism (10) & adjustable grab
handle unit (11) are fitted at the desired location. The detailed construction of the
adjustable mechanisms of each unit is explained with figures below.
Figure 2 shows the detailed mechanism of the adjustable base. As shown in Figure 2 the main base frame (12) is rectangular having members spanning in X and Y direction to support the entire assembly. Two sliding frames (13) supported on a sliding unit having male (15) and female (14) part where the male part (15) is mounted on the base frame (12) and female part (14) connected to the sliding frames (13). The two sliding frames (13) can freely slid over the base frame (12) with help of sliding unit so that the frames can be extended beyond the width of the base frame (12) thereby the width of total base structure can be adjusted. The male part (15) of the sliding unit is fitted at suitable location on base frame (12) at the front and rear side. Two sliding frames (13) are with female part (14) of the sliding unit mounted on to it. These two frames (13) are assembled on the main base frame (12) by engaging the female and the male part which enables the two frames (13) to slide in the 'Y' direction to adjust the width of the specific model. A jack mechanism (18) is provided below the base frame (12) to adjust it in vertical direction. The jack is remotely operated using a gear box (19) and a rod connected (21) to it. The rod (21) is accessible from out side and rotatable about its axis. The rotary motion of rod (21) transfer to the gear box (19) which in turn rotate jack (18)

to rise or lower in vertical direction. In the preferred embodiment as shown in figure 2 four jacks are connected to the base frame through brackets (16). A gear box (19) is connected to the base frame and a rod (17) is connected between gear box and jack to transfer the rotation. A rotatable rod (21) is connected to the gear box and other end (22) of the rod is located front side of the base frame. The rod 21 is rotated manually. The rotary motion of rod 21 is transmitted through the gear box 19 to the rods 17 which in turn rotates the jack 18. This rotary movement of the jack is converted into vertical movement which enables the complete base unit to move vertically in Z direction. The same arrangement is done at the rear side of the base. Two wheels (23) are fixed to the sleeves (24') as shown in Figure 2. The sleeves are assembled to a round bar (24) which is fixed to the main frame (12). The same arrangement is also done at the rear side of the frame. The sleeves along with the wheels can be rotated in 90 degrees so that the complete seating buck can be made mobile when required. If it is to be kept stationary the wheels are locked at 90 degree position and the complete buck stands on the four jacks (18). A scale is provided on the tubular structure with a pointer to adjust the floor height for any type of model. Also fine adjustments can be done to adjust the floor height for that specific model.
Figure 3 shows the details of adjustable steering column mechanism. The steering column unit can be adjusted in 5 different directions which are X, Y, Z positioning of steering column and angular and axial adjustment of steering column. Steering column is connect to the firewall column through a "L" shaped adjustable plate assembly. The plate assembly having one horizontal base plate (25) connected to the fire wall frame (27) and a vertical base plate (26) connected to the above horizontal plate. The steering column (39) is connected to a vertical plate (29) which in turn slidably mounted on above vertical base plate (26) in adjustable plate assembly. The horizontal plate (25) is connected to the fire wall through a sliding unit by which entire plate assembly along with steering column can be moved in X & Y direction. Two angular plates (28) are welded to the vertical plate (29). Slots (30) are provided on both the angular plates for angular adjustment of the steering column. Two male parts of the sliding unit (31) are fixed to the vertical base plate

(26). The female parts (32) of the sliding unit are fixed on the back side of the vertical plate (29). The female part (32) on the vertical plate (29) is engaged with the male part (31) for vertical movement of the steering column for adjustment in Z direction. Two plates (33, 33') are welded on the fire wall (27) and the steering column respectively. The female part of the sliding unit (34) is fixed to the plate (36). The male part of the sliding unit (35) is fixed to the plates (33, 33') and engaged with the female part (34) to make the unit adjustable in the Y direction. Another male part (37) of the sliding unit is mounted on a plate (25). The female part of the slider (38) is mounted at the bottom of plate (36) & engaged with the male part to make the unit adjustable in the X direction. Scales are provided on all the sliders for fine adjustment of the steering column. Angular scale is fixed on the angular plate for fine adjustments of the angle of steering column. In between the two angular plates a splined sleeve (39) of a suitable length is mounted on the vertical plate. A splined shaft (40) is engaged in the sleeve. At the end of the splined shaft an adaptor (41) is provided for mounting any type of steering wheel on this steering column. This arrangement enables the column to move in axial direction. Suitable locking arrangements are provided on all the five adjustable mechanisms to fix the steering column unit at the desired location. This adjustable steering column mechanism is communized for all type of models. Only the desired design positions and the steering wheel are required to change as per the requirement for a specific model.
Figure 4 shows the details of the adjustable control unit mechanism. This unit can be made adjustable in three directions i.e. X, Y & Z. The mechanism is also provided for adjusting the movement of Accelerator, Brake & Clutch pedal individually in the Y direction. The details of the mechanism are as follows;
The accelerator (58), brake (53) and clutch (54) pedal are moveably attached to a vertical plate (48). The brake pedal is connected to a splined sleeve (51) through a bracket (52) which in turn located on a splined shaft (50). The clutch pedal (54) is also connected to the splined shaft (50) as described above. The accelerator pedal is connected to a splined sleeve (57) which is sliding on a splined shaft (56)

connected to an extension portion (55) of the vertical plate (48). The splined shaft is attached to the extention portion of the vertical plate (48). This arrangement makes the possibility of moving individual pedal in Y - direction. The vertical plate (48) is connected to splined sleeve which in turn connected to another splined shaft (47) mounted on a vertical base plate (45). By this arrangement the whole pedal assembly can be movable in Z-direction. Further the vertical base plate (45) is connected to a splined sleeve (44) movable on a splined shaft (43) attached to a base plate (42). The base plate (42) is in turn fixed on the slidable base frame (13). This makes the entire arrangement adjustable in X - direction. By this arrangement the three pedal units can be moved in X & Z -direction as a unit and individually in Y - direction also.
Figure 5 shows the details of the Parking brake lever mechanism. This unit can be made adjustable in two directions i.e. X & Y directions. The details of the mechanism are as follows;
A Plate (60) with two brackets (61.61') is fixed to the sliding frame (13). Two brackets (61,61') with holes are welded to the plate (60). A splined shaft (63) with splined sleeve (62) on it fixed to the brackets (61.61'). The splined sleeve can move on the splined shaft and this enables the unit to move in the X direction. A mounting bracket (64) having upward extending arms (67) for mounting a parking brake lever is attached to the splined sleeve. The extending arms (67) having slots (66) for adjusting parking brake lever in Y -direction. Parking brake lever (65) of any existing model is mounted on the bracket (64). The parking brake lever (65) with the bracket (64) mounted on the splined sleeve (62) can be adjusted in the X direction. Any type of parking brake unit can be fitted by mounting a suitable bracket on the splined sleeve (62). Suitable locking mechanism is provided on the movable parts so as to achieve the desired position of the parking brake lever.
Figure 6 shows the details of the Gear shift lever mechanism. This unit can be made adjustable in two directions i.e. X & Z directions. The details of the mechanism are as follows;

A Plate (70) with two brackets (71,71') is fixed to the sliding frame (13). Two brackets (71,7 1') with holes are welded to the plate (70). A splined shaft (73) with splined sleeve (72) on it fixed to the brackets (71,71'). The splined sleeve can move on the splined shaft and this enables the unit to move in the X direction. A vertical splined sleeve (74) is rigidly connected to splined sleeve (72). A gear shift lever (76) fixed to a splined shaft (75) is engaged with vertical splined sleeve (74). The splined shaft (75) can move vertically in the splined sleeve (74) and this enables gear shift lever to move in Z - direction. Any type of gear shift unit can be fitted to splined shaft 75. Suitable locking mechanism is provided on the movable parts so as to achieve the desired position of the gear shift lever.
Figure 7 shows the details of the Adjustable B pillar. This unit can be made adjustable in X direction. The details of the mechanism are as follows; The front (80) and rear (80') door apertures are made of suitable material is cut to the required shape as per design. The door apertures (80,80') are connected to vertical members (81 & 81') respectively. The vertical members are fixed to the slidable base frame (13). A gap is provided between the front and rear door apertures to accommodate a adjustable B pillar (82). The B pillar master (82) is fixed to a vertical member (81"). The vertical member (81") is connected to a slidable unit having a male (85) and female part (86). As shown in the figure the door aperture is cut at the front side (83) & the rear side (84) at a suitable location to create gap to allow the B pillar master (82) to be adjustable. The male part of the slider (85) is fixed to the slidable base frame (13). The female part of the slider (86) is fixed to the vertical structure (81") at the bottom side. The complete assembly of the B pillar (82), vertical structure (81") and the female slider (86) are sliding over the male slider (85). This enables the complete B pillar assembly to move in X direction. This mechanism is done on both the sides Left hand & Right hand. Scales are provided for fine adjustments of the B pillar. This mechanism enables the optimum designing of the ingress & egress.
Figure 8 a & b shows the details of the Adjustable seat mounting mechanism. This unit can be made adjustable in three directions, i.e. X, Y & Z. The rake angle of the seat can also be changed. The details of the mechanism are as follows;

Plate (90) is cut to the required shape as shown in Figure 8. This plate has a hole (91) of suitable diameter at the center & four tapped holes (92). A screw (93) is inserted in the sleeve (94). The screw has a keyway (95) which is locked by a pin in the sleeve (94). This pin restricts the rotary movement of the screw and converts it into axial movement of screw along with the plate (90). A nut (96) is assembled with the screw (93) having thread engaging with the thread of nut. The rotation of nut (96) will move the screw vertically and same time screw is sliding on the pin through the keyway (95) so that the screw is locked with sleeve to avoid rotary motion of screw with respect to sleeve. A wedge (97) with hole at its centre is placed below the plate (90) such way that the central hole concentrically located with hole of the plate (90)and clamped to the plate through tapped holes.(92)
The wedge (97) defines the rake angle of the seat. To adjust the movement in the Z direction the nut (96) is rotated, which allows the screw (93) to move axially in the upward direction. The sleeve (94) is fixed on the plate (98) which in turn slidably mounted on bottom plate (99). The plate (98) has slots on both the sides. Plate (98) is mounted on plate (99) which also has slots matching with the slots of plate (98). The plate (98) and (99) has matching slots and this enables to move in Y -direction and fix it at suitable location. At the bottom of the plate (99) a female part (100) of the sliding unit is fixed by suitable means. The male part (101 )_of the slider is fixed to the sliding base frame (13). The female part (100) is engaged with the male part (101) to enable the unit to move in X direction. This arrangement is done for both driver and co-driver seats. Any type of seat can be used to mount it on the plate (90). With the help of the arrangement the seat position, its H point, rake angle, back rest angle, travel of the seat can be decided.
Figure 9 a & b shows the details of the Adjustable roof. Vertical members (81,81') are connected to the base sliding frame (13) and top of vertical members are connected using horizontal members (110) to form a space frame. Slotted horizontal members (111) are spanning across width and movably resting on top of the horizontal members (110). These slotted members (111) are free to move in X -direction and restricted in Y - direction by end plate members attached to the slotted members. A vertical positioning member (114) with sleeve (115) is placed

in the slotted member. Suitable locking arranged is provided on the sleeve to fix the vertical positioning member at particular height with respect to slotted horizontal member. The roof model (116) is attached to the bottom of the vertical positioning member (114). The roof height can be adjusted by repositioning the vertical member (114). The complete assembly consisting of the roof model (116), vertical positioning member (114) & sleeve (115) can be moved in the Y direction on the slotted members (111). Scales are provided on the structure of the roof for fine adjustments to achieve the optimum head room for a specific model.
Figure 10 shows the details of the Adjustable door pull on all the door panels. The door pull (121) is mounted on the plate (120) bearing two vertical slots (122). The plate (120) is attached to the door panel (123) using fasteners (124) through the vertical slots (122) provided. The fasteners can move freely in the slot so that the plate can moved vertically and tightened to door panel at desired position. This enables the door pull to move vertically in the Z direction. The door pull (121) can also be adjusted in the angular position by increasing the width of the slots (122). The mechanism is mounted on all the four door panels. Scales are provided for fine adjustments of the door pull. Figure 11 shows the details of the Adjustable grab handles.
A handle (130) is slidably fixed to a slot (131) of a member (132) which is attached to the roof model (116) (refer figure 9). This enables the grab handle to move in the X direction. Grab handles of any existing model can be used for this purpose. This mechanism is done at all the three locations, i.e. Rear roof LH and RH and the front roof LH. Scales are provided for fine adjustment of the grab handle.
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 in, so far as they come within the scope of the invention as claimed or the equivalents thereof.

We Claim:
1. A multipurpose universal seating buck comprising
adjustable controlling units such as steering, pedals, parking brake and gear shift unit to move and position the units in desired directions and locations;
adjustable vehicle body components such as roof and B pillar for locating said components at different positions;
adjustable vehicle base for varying the width of the seating buck;
mechanisms for adjusting seating positions and
an adjustable grab handle.
2. The universal seat buck as claimed in claim 1, wherein said seating buck having an adjustable door pull mechanism.
3. The universal seat buck as claimed in claim 1, wherein said adjustable steering adapted to be adjusted in 5 different directions which are X, Y, Z positioning of steering column and angular and axial adjustment of steering column.
4. The universal seat buck as claimed in claim 3, wherein mechanism for said adjustable steering column comprising
a pair of "L" shaped adjustable plate assembly constituting one horizontal base plate connected to the fire wall frame through a sliding unit adapted for mobility of said plate assembly along with steering column in X & Y direction and one vertical base plate connected to said horizontal plate;
a vertical plate slidably mounted on said vertical base plate of said adjustable plate assembly and said steering column is connected to said vertical plate;
at least two angular plates bearing slots for angular adjustment of the steering column are welded to said vertical plate;
at least two male parts of the sliding unit are mounted on said vertical base plate and corresponding female parts of the sliding unit are mounted on the back side of said vertical plate for vertical movement of the steering column for adjustment in Z direction;
scales provided on all the sliders for fine adjustment of the steering column;

at least one angular scale is adapted on said angular plate for fine adjustments of the angle of steering column;
at least one splined sleeve of a suitable length is mounted on the vertical plate and between said two angular plates adapted for engaging splined shaft (in said sleeve;
at least one adaptor is provided at the end of the splined shaft for mounting any type of steering wheel on said steering column adapted for axial movement of said column and;
locking arrangements provided on all the five adjustable mechanisms to fix the steering column unit at the desired location.
5. The universal seat buck as claimed in claim 1, wherein said adjustable parking
brake unit comprising
at least one plate with two brackets provided with holes is fixed to the sliding frame;
at least one splined shaft with splined sleeve on it fixed to said brackets such that splined sleeve can move on the splined shaft enabling the unit to move in the X direction;
at least one mounting bracket provided with upward extending arms having slots for adjusting parking brake lever in Y - direction are adapted for mounting a parking brake lever attached to said splined sleeve;
locking arrangements provided on all the movable parts so as to achieve the desired position of the parking brake lever.
6. The universal seat buck as claimed in claim 1, wherein said adjustable pedal
control unit comprising
an accelerator, brake and clutch pedal moveably attached to a vertical plate provided with splined sleeve for sliding on splined shaft provided on vertical base plate for the movement of said vertical plate in Z-direction;
at least one first splined shaft on which at least two first splined sleeves with a brackets are slidably mounted to connect said brake pedal and clutch pedal to splined shaft to form sliding assembly;
at least one second splined shaft configured to be connected between the extended portion of said vertical plate adapted for slidably mounting second

splined sleeve on which accelerator pedal is mounted for moving individual accelerator pedal in Y - direction;
said vertical base plate connected to a third splined sleeve movable on a third splined shaft attached to a base plate fixed on the slidable base frame configured for the movement of said arrangement adjustable in X - direction.
7. The universal seat buck as claimed in claim 1, wherein said adjustable gear shift
unit comprising
a plate with two brackets with holes fixed to the sliding frame;
a splined shaft with splined sleeve is fixed to said brackets to enable the said adjustable gear shift unit to move in the X direction;
a vertical splined sleeve with a splined shaft engaged in it is rigidly connected to said splined sleeve;
a gear shift lever fixed to said vertical splined shaft which can move vertically in the vertical splined sleeve enabling the gear shift lever to move in Z - direction;
locking mechanism provided on the movable parts to achieve the desired position of the gear shift lever.
8. The universal seat buck as claimed in claim 1, wherein said adjustable base
comprising
the main base frame having cross and long members to support the entire assembly;
atleast two sliding frames supported on a sliding unit having male and female sliding joint wherein the male part is mounted on said main base frame and female part connected to said sliding frames to freely slide over said main base frame such that the sliding frames can be extended beyond the width of said main base frame adapted to adjust the width of total base structure as per specific model of the vehicle:
at least one jack mechanism near each corner of said main base frame connected to it through brackets to adjust vertical displacement or height of said main base frame by operating a rod rotatable about its axis connected to a gear box and the jack;

at least two wheels adapted to be fixed to the sleeves are assembled to a round bar fixed to said main base frame to rotate in 90 degrees for mobility of complete seating whenever required or are locked at 90 degree position to keep the wheels stationary and to customize said seat buck to stand on said four jacks;
at least one scale is provided on said sliding joints to measure the distance and tubular structure of said jacks with a pointer to adjust the floor height for any type of model.
9. The universal seat buck as claimed in claim 1, wherein said adjustable roof
mechanism comprising
at least two vertical members connected to the base sliding frame and top of vertical members are connected using horizontal members to form a space frame;
plurality of slotted horizontal members spanning across width and movably resting on top of the said horizontal members are free to move in X -direction and are restricted in Y - direction by end plate members attached to said slotted horizontal members;
at least one vertical positioning member with sleeve and with suitable locking arranged is provided, on the sleeve to fix the vertical positioning member at particular height is adapted to be placed in said horizontal slotted member;
roof model configured to be attached to the bottom of said vertical positioning member;
said vertical positioning member can be repositioned for adjusting the roof height;
slotted horizontal members adapted for moving the complete assembly consisting of the roof model, vertical positioning member & sleeve in the Y direction;
scales provided on the structure of the roof for fine adjustments to achieve the optimum head room for a specific model.
10. The universal seat buck as claimed in claim 1, wherein said adjustable B pillar
unit comprising

the front and rear door apertures cut to the required shape as per design are connected to respective front and rear vertical members fixed to the slidable base frame;
a gap provided between the front and rear door apertures for accommodating adjustable B pillar;
B pillar master is fixed to another vertical member connected to a slidable unit having a male part of the slider fixed to the slidable base frame and female part of the slider fixed to said another vertical member at the bottom side;
the complete B pillar assembly of said B pillar, said another vertical and the female slider are adapted to slide over the male slider and to move in X direction;
said adjustable B pillar unit mechanism is provided on both the sides Left hand & Right hand;
scales provided for fine adjustments of the B pillar. 11. The universal seat buck as claimed in claim 1, wherein said adjustable seat mounting mechanism for both driver and co-driver seats comprising
plate cut out of required shape provided with a central hole and four tapped holes;
at least one screw inserted in the sleeve is provided with a keyway configured to be locked by a pin in said sleeve adapted to restricts the rotary movement of the screw with respect to sleeve and converts it into axial movement along with said plate cut out;
at least one nut assembled with said screw adapted to move said screw vertically by sliding on the pin through the keyway with the rotation of said nut to provide the movement in the Z direction;
at least one wedge provided with the rake angle of the seat with central hole is adapted to be clamped to said plate cut out through said tapped holes to match their respective central holes concentrically;
at least one sliding plate having slots on both the sides on which said sleeve is fixed is adapted for slidably mounting on bottom plate having matching slots to that of said sliding plate to move said seat mounting mechanism in Y -direction and also to fix it at suitable location;

said bottom plate with suitable sliding unit is mounted on said sliding base frame to enable the unit to move in X direction;
said arrangement is adapted for fixing the seat position, its H point, rake angle, back rest angle, travel of the seat.
12. The universal seat buck as claimed in claim 1, wherein said adjustable grab
handle unit comprising
a handle adapted to slidably fixed to a slot of a member attached to the roof model enabling the grab handle to move in the X direction;
said mechanism is provided at all the three locations i.e. Rear roof LH and RH and the front roof LH; and
scales are provided for fine adjustment of the grab handle.
13. The multipurpose universal seating buck substantially as herein described in
description as illustrated with reference to accompanying drawings