Title of Invention	CAR BODY FOR A MOTOR VEHICLE
Abstract	A motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit (4) and including a pressure chamber (15) of the gas spring damping unit (4) which is delimited by a piston (8), characterized in that the frame part comprises a tubular connecting piece (6) which is closed at one end for forming the pressure chamber (15) and in that the piston (8) is guided in the tubular connecting piece (6) in longitudinally displaceable manner. To, The Controller of Patents The Patent Office Mumbai (Figure 2)

Title of Invention

CAR BODY FOR A MOTOR VEHICLE

Abstract

A motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit (4) and including a pressure chamber (15) of the gas spring damping unit (4) which is delimited by a piston (8), characterized in that the frame part comprises a tubular connecting piece (6) which is closed at one end for forming the pressure chamber (15) and in that the piston (8) is guided in the tubular connecting piece (6) in longitudinally displaceable manner. To, The Controller of Patents The Patent Office Mumbai (Figure 2)

Full Text	FORM 2 THE PATENT ACT 1970 (39 of 1970) & The Patents Rules, 2003 PROVISIONAL / COMPLETE SPECIFICATION (See Section 10, and rule 13) 1. TITLE OF INVENTION CAR BODY FOR A MOTOR VEHICLE 2. APPLICANT(S) a) Name : GM GLOBAL TECHNOLOGY OPERATIONS, INC. b) Nationality : AMERICAN Company c) Address : 300 RENAISSANCE CENTER DETROIT, MI 48265-3000 U.S.A. 3. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed : Description The invention relates to a motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit and including a pressure chamber of the gas spring damping unit which is delimited by a piston. Gas spring damping units are known in principle, for example, from EP 0 160 277 Bl. An embodiment utilising the so-called two-chamber design is characterised by its greater overall height than that of known pneumatic springs or steel springs, mini block springs for example. In consequence, the gas spring damping unit needs a very large amount of space. The invention is based on the problem of designing a motor vehicle body of the kind mentioned hereinabove in such a way that it is of particularly low weight and is of particularly compact construction in the region of the gas spring damping unit. In accordance with the invention, this problem is solved in that the frame part has a seating for at least a sub portion of the gas spring damping unit. Due to this design, a sub portion of the gas spring damping unit, the pressure chamber for example, can be integrated in the frame part. In consequence, the gas spring damping unit does not need a complicated form of attachment to the frame part. The motor vehicle body in accordance with the invention can thus be designed to be particularly low, this thereby leading to the motor vehicle having a particularly low loading area. Furthermore, the integration of the sub portion of the gas spring damping unit into the frame part leads to the weight of the motor vehicle body and the gas spring damping unit being particularly low. The gas spring damping unit could comprise a cartouche incorporating the pressure chamber for example and be inserted and fixed into the seating of the frame part. However, the motor vehicle body in accordance with the invention requires a particularly small number of components if the frame part comprises a tubular connecting piece which is closed at one end for the formation of the pressure chamber and if the piston is guided in longitudinally displaceable manner in the tubular connecting piece. The motor vehicle body in accordance with the invention is of particularly compact design if at least a sub portion of the pressure chamber is arranged within the cross section of a longitudinal beam of the motor vehicle body. Hereby, the longitudinal beam forms the frame part. The process of manufacturing the motor vehicle body in accordance with the invention is particularly simple, if the connecting piece is welded to the frame part. For the purposes of contributing to a further decrease in the weight of the motor vehicle body in accordance with the invention, the connecting piece is an aluminium profile. Preferably, the aluminium profile is manufactured using an extrusion process. A guideway for the piston is preferably improved by an anodic surface treatment. The connecting piece could comprise a blind hole for the seating of the piston for example. However, in accordance with another advantageous further development of the invention, the gas spring damping unit can be produced in a particularly simple manner if the connecting piece is closed in gas-tight manner by a cover. The gas-tight connection of the cover to the connecting piece is preferably effected in cohesive manner by welding of adhesion. In accordance with another advantageous further development of the invention, the gas spring damping unit is of particularly simply construction if the end of the connecting piece remote from the cover has a collar for the attachment in gas-tight manner of rubber bellows. In consequence, the motor vehicle body in accordance with the invention needs particularly few components. For the purposes of contributing to a simplification in the mounting of the gas spring damping unit in the motor vehicle body in accordance with the invention, a piston rod that is connected to the piston has, at the end thereof remote from the piston, a bearing comprising a rubber damper for attachment to an axle of the motor vehicle body. The invention permits of different embodiments. For the further elucidation of its basic principle, one of these is illustrated in the drawing and is described in the following. In the drawing, Fig. 1 schematically shows a rear sub portion of a motor vehicle incorporating a motor vehicle body in accordance with the invention, Fig. 2 shows a greatly enlarged illustration of the motor vehicle body in the vicinity of a gas spring damping unit, Fig. 3 shows a sectional view through a connecting piece of the motor vehicle body in Figure 2 along the line III - III, Figure 1 shows a rear portion of a schematically illustrated motor vehicle body 1 having a left rear wheel 2. A longitudinal beam 3 of the motor vehicle body 1 is represented in the drawing by a dash-dotted line. Figure 2 shows a sub portion of the motor vehicle body 1 of Figure 1 in the vicinity of a gas spring damping unit 4 in the form of a greatly enlarged sectional view. The gas spring damping unit 4 is fixed to the longitudinal beam 3 and is articulated to an axle 5 which is to be connected to the wheel 2 in Figure 1. The longitudinal beam 3 comprises a tubular connecting piece 6 having a guideway 7 for a piston 8 which is guided in the connecting piece 6 in longitudinally displaceable manner. The piston 8 is fixed on a piston rod 9. A bearing 10 comprising a rubber damper 11 is provided for the attachment of the piston rod 9 to the axle 5. The connecting piece 6 is closed in gas-tight manner at the end thereof remote from the axle 5 by a cover 12. The cover 12 is welded in the connecting piece 6 for example. At the end thereof remote from the axle 5, the connecting piece 6 has a collar 13 for the attachment in gas-tight manner of rubber bellows 14. In addition, the rubber bellows 14 is connected in gas-tight manner to the piston rod 9 The gas spring damping unit 4 has a pressure chamber 15 between the piston 8 and the cover 12. The cover 12 simultaneously forms a stop for the movement of the piston 8. The pressure chamber 15 is arranged completely within the cross section of the longitudinal beam 3. Furthermore, the connecting piece 6 has flanges 18,19 that are connected by welding seams 16,17 to the longitudinal beam 3. The connecting piece 6 can be manufactured as an extruded aluminium profile for example. Figure 3 shows in a sectional view through the longitudinal beam 3 of Figure 2 along the line III - III that the flanges 18,19 of the connecting piece 6 that are welded to the longitudinal beam 3 project in bar-like manner from the connecting piece 6. The flanges 18,19 are welded to the longitudinal beam 3 at their free ends. List of reference symbols 1 motor vehicle body 2 wheel 3 longitudinal beam 4 gas spring damping unit 5 axle 6 connecting piece 7 guideway 8 piston 9 piston rod 10 bearing 11 rubber damper 12 cover 13 collar 14 rubber bellows 15 pressure chamber 16,17 welding seam 18,19 flange We Claim: 1. A motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit (4) and including a pressure chamber (15) of the gas spring damping unit (4) which is delimited by a piston (8), characterized in that the frame part comprises a tubular connecting piece (6) which is closed at one end for forming the pressure chamber (15) and in that the piston (8) is guided in the tubular connecting piece (6) in longitudinally displaceable manner. 2. A motor vehicle body (1) in accordance with Claim 1, characterized in that at least a sub portion of the pressure chamber (15) is arranged within the cross section of a longitudinal beam (3) of the motor vehicle body (1). 3. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is welded to the frame part. 4. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is an aluminium profile. 5. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is closed in gas-tight manner by a cover (12). 6. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the end of the connecting piece (6) remote from the cover (12) has a collar (13) for the attachment of a rubber bellows (14) in gas-tight manner. 7. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that a piston rod (9) connected to the piston (8) has, at the end thereof remote from the piston (8), a bearing (10) comprising a rubber damper (11) for attachment to an axle (5) of the motor vehicle body (1). Dated this 19th day of December, 2006 HIRAL CHANDRAKANT JOSHI AGENT FOR GM GLOBAL TECHNOLOGY OPERATIONS, INC.

Full Text

FORM 2
THE PATENT ACT 1970 (39 of 1970)
&
The Patents Rules, 2003 PROVISIONAL / COMPLETE SPECIFICATION (See Section 10, and rule 13)
1. TITLE OF INVENTION
CAR BODY FOR A MOTOR VEHICLE
2. APPLICANT(S)
a) Name : GM GLOBAL TECHNOLOGY OPERATIONS, INC.
b) Nationality : AMERICAN Company
c) Address : 300 RENAISSANCE CENTER
DETROIT, MI 48265-3000 U.S.A.
3. PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed :

Description
The invention relates to a motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit and including a pressure chamber of the gas spring damping unit which is delimited by a piston.
Gas spring damping units are known in principle, for example, from EP 0 160 277 Bl. An embodiment utilising the so-called two-chamber design is characterised by its greater overall height than that of known pneumatic springs or steel springs, mini block springs for example. In consequence, the gas spring damping unit needs a very large amount of space.
The invention is based on the problem of designing a motor vehicle body of the kind mentioned hereinabove in such a way that it is of particularly low weight and is of particularly compact construction in the region of the gas spring damping unit.
In accordance with the invention, this problem is solved in that the frame part has a seating for at least a sub portion of the gas spring damping unit.
Due to this design, a sub portion of the gas spring damping unit, the pressure chamber for example, can be integrated in the frame part. In consequence, the gas spring damping unit does not need a complicated form of attachment to the frame part. The motor vehicle body in accordance with the invention can thus be designed to be particularly low, this thereby leading to the motor vehicle having a particularly low loading area. Furthermore, the integration of the sub portion of the gas spring damping unit into the frame part leads to the weight of the motor vehicle body and the gas spring damping unit being particularly low.
The gas spring damping unit could comprise a cartouche incorporating the pressure chamber for example and be inserted and fixed into the seating of the frame part.

However, the motor vehicle body in accordance with the invention requires a particularly small number of components if the frame part comprises a tubular connecting piece which is closed at one end for the formation of the pressure chamber and if the piston is guided in longitudinally displaceable manner in the tubular connecting piece.
The motor vehicle body in accordance with the invention is of particularly compact design if at least a sub portion of the pressure chamber is arranged within the cross section of a longitudinal beam of the motor vehicle body. Hereby, the longitudinal beam forms the frame part.
The process of manufacturing the motor vehicle body in accordance with the invention is particularly simple, if the connecting piece is welded to the frame part.
For the purposes of contributing to a further decrease in the weight of the motor vehicle body in accordance with the invention, the connecting piece is an aluminium profile. Preferably, the aluminium profile is manufactured using an extrusion process. A guideway for the piston is preferably improved by an anodic surface treatment.
The connecting piece could comprise a blind hole for the seating of the piston for example. However, in accordance with another advantageous further development of the invention, the gas spring damping unit can be produced in a particularly simple manner if the connecting piece is closed in gas-tight manner by a cover. The gas-tight connection of the cover to the connecting piece is preferably effected in cohesive manner by welding of adhesion.
In accordance with another advantageous further development of the invention, the gas spring damping unit is of particularly simply construction if the end of the connecting piece remote from the cover has a collar for the attachment in gas-tight

manner of rubber bellows. In consequence, the motor vehicle body in accordance
with the invention needs particularly few components.
For the purposes of contributing to a simplification in the mounting of the gas spring
damping unit in the motor vehicle body in accordance with the invention, a piston
rod that is connected to the piston has, at the end thereof remote from the piston, a
bearing comprising a rubber damper for attachment to an axle of the motor vehicle
body.
The invention permits of different embodiments. For the further elucidation of its basic principle, one of these is illustrated in the drawing and is described in the following. In the drawing,
Fig. 1 schematically shows a rear sub portion of a motor vehicle
incorporating a motor vehicle body in accordance with the invention,
Fig. 2 shows a greatly enlarged illustration of the motor vehicle body in the
vicinity of a gas spring damping unit,
Fig. 3 shows a sectional view through a connecting piece of the motor vehicle
body in Figure 2 along the line III - III,
Figure 1 shows a rear portion of a schematically illustrated motor vehicle body 1 having a left rear wheel 2. A longitudinal beam 3 of the motor vehicle body 1 is represented in the drawing by a dash-dotted line.
Figure 2 shows a sub portion of the motor vehicle body 1 of Figure 1 in the vicinity of a gas spring damping unit 4 in the form of a greatly enlarged sectional view. The gas spring damping unit 4 is fixed to the longitudinal beam 3 and is articulated to an axle 5 which is to be connected to the wheel 2 in Figure 1. The longitudinal beam 3 comprises a tubular connecting piece 6 having a guideway 7 for a piston 8 which is guided in the connecting piece 6 in longitudinally displaceable manner. The piston 8

is fixed on a piston rod 9. A bearing 10 comprising a rubber damper 11 is provided for the attachment of the piston rod 9 to the axle 5. The connecting piece 6 is closed in gas-tight manner at the end thereof remote from the axle 5 by a cover 12. The cover 12 is welded in the connecting piece 6 for example. At the end thereof remote from the axle 5, the connecting piece 6 has a collar 13 for the attachment in gas-tight manner of rubber bellows 14. In addition, the rubber bellows 14 is connected in gas-tight manner to the piston rod 9
The gas spring damping unit 4 has a pressure chamber 15 between the piston 8 and the cover 12. The cover 12 simultaneously forms a stop for the movement of the piston 8. The pressure chamber 15 is arranged completely within the cross section of the longitudinal beam 3. Furthermore, the connecting piece 6 has flanges 18,19 that are connected by welding seams 16,17 to the longitudinal beam 3. The connecting piece 6 can be manufactured as an extruded aluminium profile for example.
Figure 3 shows in a sectional view through the longitudinal beam 3 of Figure 2 along the line III - III that the flanges 18,19 of the connecting piece 6 that are welded to the longitudinal beam 3 project in bar-like manner from the connecting piece 6. The flanges 18,19 are welded to the longitudinal beam 3 at their free ends.

List of reference symbols
1 motor vehicle body
2 wheel
3 longitudinal beam
4 gas spring damping unit
5 axle
6 connecting piece
7 guideway
8 piston
9 piston rod
10 bearing
11 rubber damper
12 cover
13 collar
14 rubber bellows
15 pressure chamber 16,17 welding seam 18,19 flange

We Claim:
1. A motor vehicle body for a motor vehicle comprising a frame part and a gas spring damping unit (4) and including a pressure chamber (15) of the gas spring damping unit (4) which is delimited by a piston (8), characterized in that the frame part comprises a tubular connecting piece (6) which is closed at one end for forming the pressure chamber (15) and in that the piston (8) is guided in the tubular connecting piece (6) in longitudinally displaceable manner.
2. A motor vehicle body (1) in accordance with Claim 1, characterized in that at least a sub portion of the pressure chamber (15) is arranged within the cross section of a longitudinal beam (3) of the motor vehicle body (1).
3. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is welded to the frame part.
4. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is an aluminium profile.
5. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the connecting piece (6) is closed in gas-tight manner by a cover (12).
6. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that the end of the connecting piece (6) remote from the cover (12) has a collar (13) for the attachment of a rubber bellows (14) in gas-tight manner.

7. A motor vehicle body (1) in accordance with at least one of the preceding Claims, characterized in that a piston rod (9) connected to the piston (8) has, at the end thereof remote from the piston (8), a bearing (10) comprising a rubber damper (11) for attachment to an axle (5) of the motor vehicle body (1).
Dated this 19th day of December, 2006
HIRAL CHANDRAKANT JOSHI AGENT FOR GM GLOBAL TECHNOLOGY OPERATIONS, INC.

Documents:

1576-mumnp-2006-abstract(07-08-2008).doc

1576-mumnp-2006-abstract(07-08-2008).pdf

1576-MUMNP-2006-ABSTRACT(7-8-2008).pdf

1576-mumnp-2006-abstract.doc

1576-mumnp-2006-abstract.pdf

1576-mumnp-2006-cancelled pages(07-08-2008).pdf

1576-MUMNP-2006-CANCELLED PAGES(7-8-2008).pdf

1576-MUMNP-2006-CLAIMS(7-8-2008).pdf

1576-mumnp-2006-claims(granted)-(07-08-2008).doc

1576-mumnp-2006-claims(granted)-(07-08-2008).pdf

1576-mumnp-2006-claims.doc

1576-mumnp-2006-claims.pdf

1576-mumnp-2006-correspondance-received.pdf

1576-mumnp-2006-correspondence(07-08-2008).pdf

1576-MUMNP-2006-CORRESPONDENCE(7-8-2008).pdf

1576-mumnp-2006-correspondence(ipo)-(12-08-2008).pdf

1576-mumnp-2006-description (complete).pdf

1576-MUMNP-2006-DESCRIPTION(COMPLETE)-(7-8-2008).pdf

1576-mumnp-2006-drawing(07-08-2008).pdf

1576-MUMNP-2006-DRAWING(7-8-2008).pdf

1576-mumnp-2006-drawings.pdf

1576-mumnp-2006-form 1(20-12-2006).pdf

1576-MUMNP-2006-FORM 1(7-8-2008).pdf

1576-MUMNP-2006-FORM 16(19-9-2011).pdf

1576-mumnp-2006-form 18(20-12-2006).pdf

1576-mumnp-2006-form 2(7-8-2008).pdf

1576-mumnp-2006-form 2(granted)-(07-08-2008).doc

1576-mumnp-2006-form 2(granted)-(07-08-2008).pdf

1576-MUMNP-2006-FORM 2(TITLE PAGE)-(7-8-2008).pdf

1576-mumnp-2006-form 3(20-12-2006).pdf

1576-MUMNP-2006-FORM 3(7-8-2008).pdf

1576-mumnp-2006-form 5(20-12-2006).pdf

1576-MUMNP-2006-FORM 5(7-8-2008).pdf

1576-mumnp-2006-form-1.pdf

1576-mumnp-2006-form-18.pdf

1576-mumnp-2006-form-2.doc

1576-mumnp-2006-form-2.pdf

1576-mumnp-2006-form-3.pdf

1576-mumnp-2006-form-5.pdf

1576-mumnp-2006-form-pct-ib-301.pdf

1576-mumnp-2006-form-pct-ib-304.pdf

1576-mumnp-2006-form-pct-ipea-409.pdf

1576-mumnp-2006-form-pct-ipea-416.pdf

1576-mumnp-2006-form-pct-ro-101.pdf

1576-MUMNP-2006-PCT-PEA-409(7-8-2008).pdf

1576-mumnp-2006-power of attorney(20-12-2006).pdf

1576-MUMNP-2006-POWER OF ATTORNEY(7-8-2008).pdf

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Patent Number

222954

Indian Patent Application Number

1576/MUMNP/2006

PG Journal Number

06/2009

Publication Date

06-Feb-2009

Grant Date

27-Aug-2008

Date of Filing

20-Dec-2006

Name of Patentee

GM GLOBAL TECHNOLOGY OPERATIONS, INC.

Applicant Address

300 RENAISSANCE CENTER DETROIT, MI 48265-3000 U.S.A.

Inventors:

#	Inventor's Name	Inventor's Address
1	SIEBENEICK JURGEN	MUHLENWEG 22, 55430 OBERWESEL, GERMANY.

PCT International Classification Number

B62D25/08

PCT International Application Number

PCT/EP05/006777

PCT International Filing date

2005-06-23

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	10 2004 030471.8	2004-06-24	Germany