FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Body-chassis flexible connection for seat belt anchorage
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. Sanjay Apte
Mr. Musaib Momin
Mr. D S Venu
Indian National
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 performed

FIELD OF INVENTION
This invention relates to Body-chassis floating connection for seat belt anchorage more particularly to the restriction of vehicle floor deformation due to the movement of seat occurring when impact load acts on a vehicle seats so as to avoid probable injury to the vehicle occupant,
BACKGROUND OF INVENTION
During impact and accidents it was observed that deformation of the vehicle floor takes place due to inertia effect of the seat and the passenger causing injury to the passenger. In a motor vehicle, the seats which have three occupants or more seating capacity, and those occupants who do not sit near the BIW side pillar 22-a are referred to as middle occupant. In many motor vehicles the middle occupant has been provided with three point (PI, P2 & P3) seat belts 19(see FIG-6). Normally the seat belt retraction PI for middle occupant is packaged either on the backrest of the middle seat 17 or on the roof or on the cushion of the seat. In the present invention the seat belt retraction PI is packaged on the seat backrest of the middle seat 17. This gives very high forces on the seat backrest 17 during impact and accidents. In order to take these forces the backrests of both the outboard occupant seat LH side 16-a and outboard occupant seat R.H side (not shown) is normally provided with a latch 20 & striker 21 is anchored on the BIW side pillar 22-a (see FIG-7).But this arrangement restricts the entry dimensions "X" (see FIG-8) to the subsequent seat row just behind the seat under discussion.
OBJECTS OF THE INVENTION
The main object of the invention is to obviate the above mentioned drawbacks.
Another object of the invention is to develop a Body-chassis floating connection for seat belt anchorage.

Yet another object of the invention is to provide the restriction of vehicle floor deformation due to the movement of seat occurring when impact load acts on a vehicle seats so as to avoid probable injury to the vehicle occupant.
SUMMARY OF THE INVENTION
The various embodiments of the present invention provide a body-chassis connection system for seat belt anchorage in vehicles. The connection system comprises a flat plate coupled below a vehicle floor. A pair of bracket is coupled below said flat plate. A bolt is coupled between lower ends of said pair of brackets. A reinforcement cover is coupled on a tubular cross member for chassis support. A forged bracket is coupled to reinforcement cover of said tubular cross member towards one end and other end of said forged bracket lies above said bolt in-between said pair of bracket. The connection system is provided for coupling said vehicle body with chassis frame to restrict movement of vehicle floor during accidents. According to present invention, one end of the forged bracket is solid portion which is welded to said reinforcement cover and the other end having a hook shaped portion lies above said bolt in-between said pair of brackets. During accidents said vehicle floor is pulled in upward direction after certain free movement said hook shaped portion in said forget bracket locks with said bolt to restrict the movement to avoid deformation of vehicle floor and hence anchorages said seat belt.
According to embodiment of the present invention a body-chassis connection system for seat belt anchorage in vehicles is provided. The connection system comprises a flat plate coupled below a vehicle floor. A rod coupled below said flat plate. A wire rope with one end coupled to said rod and other end of said wire rope is coupled to a cross member of the a chassis frame. One end of said wire rope is coupled to the said rod by using 'U' bolt, retainer and a nut and another end of the wire rope is coupled to the cross member of the chassis by using 'U' bolt, retainer and nut.

According to embodiment of the present invention a body-chassis connection system for seat belt anchorage in vehicles is provided. The connection system a flat plate coupled below a vehicle floor. A rod is coupled below said flat plate. A belt with one end coupled to said rod and another end of said belt is coupled to a cross member of the chassis frame. The belt is coupled between said rod and a chassis cross member to form a loop of required size.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG-1 is a perspective view of the floating connection between the chassis frame and
the vehicle body, according to first embodiment of the present invention.
FIG-2 is a perspective view showing all related parts of a present invention.
FIG-3 is an isometric view of FIG. 2.
FIG-4 is an isometric view similar to FIG. 3 showing the flange nut of the present
invention.
FIG-5 is a plan view of FIG. 2 without forged bracket.
FIG-6 is an isometric view of the present invention showing three point seat belt
anchorage systems for middle seat occupant
FIG-7 is a front view of the conventional seat anchorage system showing latch and
striker anchored on the BIW side pillar.
FlG-8 is an isometric view of the conventional seat anchorage system showing entry
dimension "X" for the subsequent row.
FIG-9 is an isometric view of the present invention showing entry dimension "X" for
the subsequent row.
FIG10 is an isometric view of the second embodiment of the present invention
showing floating connection between vehicle body & chassis using rope.
FIG-11 is a side view of the second embodiment of the present invention.
FIG 12 is an isometric view of the third embodiment of the present invention showing
floating connection between vehicle body & chassis using belt.

FIG-13 is a side view of the third embodiment of the present invention.
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 various embodiments of the present invention provide a body-chassis connection system for seat belt anchorage in vehicles. The connection system comprises a flat plate coupled below a vehicle floor. A pair of bracket is coupled below said flat plate. A bolt is coupled between lower ends of said pair of brackets. A reinforcement cover is coupled on a tubular cross member for chassis support. A forged bracket is coupled to reinforcement cover of said tubular cross member towards one end and other end of said forged bracket lies above said bolt in-between said pair of bracket. The connection system is provided for coupling said vehicle body with chassis frame to restrict movement of vehicle floor during accidents. According to present invention, one end of the forged bracket is solid portion which is welded to said reinforcement cover and the other end having a hook shaped portion lies above said bolt in-between said pair of brackets. During accidents said vehicle floor is pulled in upward direction after certain free movement said hook shaped portion in said forget bracket locks with said bolt to restrict the movement to avoid deformation of vehicle floor and hence anchorages said seat belt.
According to embodiment of the present invention a body-chassis connection system for seat belt anchorage in vehicles is provided. The connection system comprises a flat plate coupled below a vehicle floor. A rod coupled below said flat plate. A wire rope with one end coupled to said rod and other end of said wire rope is coupled to a cross member of the a chassis frame. One end of said wire rope is coupled to the said

rod by using 'U' bolt, retainer and a nut and another end of the wire rope is coupled to the cross member of the chassis by using 'U' bolt, retainer and nut.
According to embodiment of the present invention a body-chassis connection system for seat belt anchorage in vehicles is provided. The connection system a flat plate coupled below a vehicle floor. A rod is coupled below said flat plate. A belt with one end coupled to said rod and another end of said belt is coupled to a cross member of the chassis frame. The belt is coupled between said rod and a chassis cross member to form a loop of required size.
Referring to FIG. 1 to FIG. 13, during accidents, impact or similar tests it was observed that deformation of the vehicle floor takes place due to inertia effect of the seat and the dummy. Hence to overcome the floor deformation a rigid connection is required. In this instant application the rigid support is taken from the chassis. And to avoid the drawbacks of prior art, in the instant application no such latch 20 on the backrests of both outboard occupant seat LH side 16 and outboard occupant seat RH side 18 is given. And no striker 21 is given on BIW side pillar 22 so that the dimension "X" can be maximized (see FIG-9), this helps in ease of entry to the subsequent seat row. To take care of the high forces during ECE R14 Regulatory test and any similar crash tests the present floating connection is given.
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 the F1G-1 which covers all the related parts of the First embodiment of the present invention. Seat comprises seat cushion 14 & seat back rest 15, the seat cushion 14 is connected to the seat latch 13 which in turn is latched on striker rod 12.

The striker rod 12 is welded on the reinforcement plate 11.The reinforcement platell is welded to the vehicle floor 10. The vehicle floor 10 is welded to the flat plate 2 which inturn welded to the 'L' shaped brackets 1 & 3. All these parts are constructed from high strength metal. Now this whole combination of parts summarized above is referred as a vehicle body.
Now referring to F1G-2, Chassis frame comprises tubular cross member 6 on which reinforcement cover 5 is welded and then forged bracket 4 is welded on the reinforcement cover 5. The geometry of the forged bracket 4 is made in such a way that it has to take maximum impact load and its construction made out of high strength metal. This arrangement is referred as chassis.
When the vehicle body is assembled on the chassis frame such that the forged bracket 4 lies between the two 'L' shaped brackets 1&3. Thereafter washer 8 (shown in FIG-3) and bolt 7 is placed in such a way that this bolt 7 is passing through the holes 1-b & 3-a of the both 'L' shape brackets 1&3 respectively. Finally flange nut 9 (show in FIG-4) is tightened by applying torque against the bolt 7 to assure firm fixing of bolt 7 at place.
During impact or accident or any similar crash tests when the impact load is applied on torso & thigh portions the seat will try to pull along with the passenger or dummy (not shown) placed on the seat in vehicle forward direction, due to inertia effect of both the seat and the passenger or dummy (not shown) the vehicle floor 10 also is pulled in longitudinal and upward direction. After certain free movement no further deformation of the vehicle floor 10 takes place as the forged bracket 4 which acts as a "hook" which locks the bolt 7.

Now Referring to the drawings, FIG-10 & FIG-11 illustrates another embodiment of the instant application. This embodiment can be employed in place of first embodiment to achieve same purpose as in first embodiment. This embodiment consists of 'U' shape rod 23 is welded to the flat plate 24 having four holes at corners. Therein a wire rope 26 one end which connected to the 'U' shape rod 23 by using 'IT bolt 27-a & retainer 28-a along with nut 28-c and another end of the wire rope 26 is connected to the cross member 6 of the chassis by using 'U' bolt 27-b & retainer 28-b along with nut 28-c as shown in the FIG-10. The above arrangement is referred as a part of chassis, when vehicle body is assembled to the chassis the assembly of 'LP shape rod 23 & flat plate 24 is fixed to the vehicle floor 10 by using four bolts 25(a-d). Now During impact or accident or any similar crash tests when the impact load is applied on torso & thigh portions the seat will try to pull along with passenger or dummy (not shown) placed on the seat in vehicle forward direction, due to inertia effect of both the seat and passenger or dummy (not shown) the vehicle floor 10 pulled in longitudinal and upward direction. After certain free movement no further deformation of the vehicle floor 10 takes place as wire rope 26 which connects between vehicle floor 10 and the cross member 6 of the chassis which restricts the deformation of the vehicle floor 10.
F1G-12 & FIG-13 illustrates third embodiment of the instant application. This embodiment can be employed in place of first embodiment to achieve same purpose as in first embodiment. This embodiment is similar to second embodiment in working as well as parts employed except wire rope 26. 'LP bolts 27-a & 27-b, retainer 28-a& 28-b and nut 28-c these are not used in this embodiment. In Third embodiment in place of wire rope 26, belt 29 is deployed to connect between the vehicle floor 10 and the cross member 6 of the chassis. This embodiment consists of belt 29 which is stitched at both ends to form a loop of required size; one loop of the belt 29 is inserted into the 'LP shape rod 23. 'LP shape rod 23 is then welded to the

flat plate 24 having four holes at corners. Another end of the belt loop 29 is inserted into the cross member 6 of the chassis & then this cross member 6 is welded to the chassis long members. The above arrangement is referred as a part of chassis, when vehicle body is assembled to the chassis the assembly of 'U' shape rod 23 & flat plate 24 is fixed to the vehicle floor 10 by using four bolts 25(a-b). During any impact or accident or similar crash tests when the impact load is applied on torso & thigh portions as per the regulation requirements the seat will try to pull along with passenger or dummy (not shown) placed on the seat in vehicle forward direction, due to inertia effect of both the seat and passenger or dummy (not shown) the vehicle floor 10 pulled in longitudinal and upward direction. After certain free movement no further deformation of the vehicle floor 10 takes place as the belt 29 which connects between vehicle floor 10 and the cross member 6 of the chassis which restricts the deformation of the vehicle floor 10.
Advantages
The present invention provide a body-chassis floating connection for seat belt anchorage to restrict vehicle floor deformation due to movement of seat occurring when impact load acts on a vehicle seats so as to avoid probable injury to the vehicle occupant.
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 body-chassis connection system for seat belt anchorage in vehicles, comprising;
a flat plate coupled below a vehicle floor;
a pair of bracket coupled below said flat plate;
a bolt coupled between lower end of said pair of brackets;
a reinforcement cover 5 coupled on a tubular cross member provided for chassis
support;
a forged bracket coupled to reinforcement cover of said tubular cross member
towards one end and other end of said forged bracket lies above said bolt in-between
said pair of bracket:
said connection system is provided for coupling said vehicle body with chassis frame
to restrict movement of vehicle floor during accidents.
2. The system according to claim 1, wherein said flat plate is welded to vehicle floor and upper end of said pair of bracket is welded below said flat plate and reinforcement cover 5 is welded to tubular cross member 6.
3. The system according to claim 1, wherein said pair of brackets having a hole at its lower part for fixing said bolt with a washer at one end and a flange nut at other end.
4. The system according to claim 1, wherein one end said forged bracket 4 is solid portion which is welded to said reinforcement cover and other end having a hook shaped portion lies above said bolt in-between said pair of brackets.
5. The system according to claim 1, wherein said pair of brackets are L-shaped.
6. The system according to claim 1, wherein during accidents said vehicle floor is pulled in upward direction after certain free movement said hook shaped portion in

said forget bracket locks with said bolt 7 to restrict the movement to avoid deformation of vehicle floor and hence anchorages said seat belt.
7. A body-chassis connection system for seat belt anchorage in vehicles, comprising;
a flat plate coupled below a vehicle floor;
a rod 23 coupled below said flat plate;
a wire rope 26 with one end coupled to said rod 23 and another end of said wire rope
26 coupled to a cross member 6 of the a chassis frame.
8. The system according to claim 7, wherein said flat plate having a plurality of holes for mounting with vehicle floor.
9. The system according to claim 7, wherein said rod is U-shaped which is welded below vehicle floor.

10. The system according to claim 1. wherein one end of said wire rope 26 is coupled to the said rod 23 by using 'U' bolt 27-a, retainer 28-a and nut 28-c and another end of the wire rope 26 is coupled to the cross member 6 of the chassis by using 'U' bolt 27-b, retainer 28-b and nut 28-c.
11. The system according to claim 1, wherein during accidents said vehicle floor is pulled in upward direction after certain free movement said wire rope 26 which connects between vehicle floor 10 and the cross member 6 of the chassis restricts deformation of the vehicle floor 10 and hence anchorages said seat belt.
12. A body-chassis connection system for seat belt anchorage in vehicles,
comprising;
a flat plate coupled below a vehicle floor;

a rod 23 coupled below said flat plate;
a belt 29 with one end coupled to said rod 23 and another end of said belt 29 is
coupled to a cross member 6 of the a chassis frame.
13. The system according to claim 1. wherein said rod is U-shaped and welded below vehicle floor.
14. The system according to claim 1, wherein said belt 29 is coupled between said rod and a chassis frame cross member to form a loop of required size.
15. The system according to claim 1, wherein during accidents said vehicle floor is pulled in upward direction after certain free movement said belt 29 which connects between vehicle floor 10 and the cross member 6 of the chassis restricts deformation of the vehicle floor 10 and hence anchorages said seat belt.