Vehicle seat cushion

• US 5,671,978 A
• Filed: 06/28/1996
• Issued: 09/30/1997
• Est. Priority Date: 06/28/1996
• Status: Expired due to Term

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Olsson, Lars-Eric Verner
• Primary Examiner(s): Cranmer, Laurie K.
• Application Number:
  US08/672,645
• Time in Patent Office: 459 Days
• Field of Search: 297/452.55, 297/216.1, 297/335, 297/336, 297/337, 297/452.57, 297/DIG. 1, 296/65.1, 296/68.1
• US Class Current: 297/452.55
• CPC Class Codes: B60N 2/305 the cushion being hinged on the vehicle frame
• CPC Class Codes: B60N 2/36 into a loading platform B60N2/065 takes precedence
• CPC Class Codes: B60N 2/4235 transversal
• CPC Class Codes: B60N 2/4249 fixed structures, i.e. where neither the seat nor a part thereof are displaced during a crash
• CPC Class Codes: B60N 2205/35 Seat, bench or back-rests being split laterally in two or more parts

Abstract

In a vehicular seat assembly, a side impact resistant seat cushion includes a base plate. A foam pad and a fabric covering are disposed over the base plate. Laterally extending first and second beams are fixed to the base plate for rigidifying the base plate to increase resistance to buckling under side impact loading thereby improving passenger safety. The first and second beam are rigidly held in a parallel relationship above the top surface of the base plate by right and left brackets. In the case of a full length style bench seat, a bridge bracket may be provided to span and support intermediate gapped sections in each of the first and second beams. The first and second beams provide an added measure of column strength to the base plate during side impact situations where prior art base plates would have a tendency to buckle and fold. With the first and second beams, the base plate may be fabricated from thinner gauge (lighter and less expensive) sheet metal than prior art base plates and still provide greater resistance to buckling in the event of side impact loads.

Claims

1. A side impact resistant seat cushion for a vehicular seat assembly, said seat cushion comprising:

a base plate having a top surface bounded by a left end and a right end and a front edge and a rear edge;

a foam pad disposed over said top surface of said base plate;

a fabric covering disposed over said foam pad and operatively connected adjacent said right and left ends and said front and rear edges of said base plate;

said base plate including a first beam extending laterally substantially from said left end to said right end thereof for rigidifying said base plate to increase resistance to buckling under side impact loading thereby improving passenger safety, said first beam disposed between said top surface of said base plate and said fabric covering;

said base plate further including a second beam spaced from and parallel to said first beam and disposed between said top surface of said base plate and said fabric covering;

each of said first and second beams having an elevation measured perpendicularly from a respective portion thereof to said to top surface;

said elevation of said second beam being less than said elevation of said first beam.

2. An assembly as set forth in claim 1 wherein said first beam is substantially enveloped in said foam pad.

3. An assembly as set forth in claim 2 wherein said first beam is tubular.

4. An assembly as set forth in claim 3 wherein said first beam has a generally circular cross-section.

5. An assembly as set forth in claim 4 further including a right bracket extending generally perpendicularly between said first beam and said right end of said base plate, and a left bracket extending generally perpendicularly between said first beam and said left end of said base plate.

6. An assembly as set forth in claim 5 wherein said second beam being supported between said right and left brackets.

7. An assembly as set forth in claim 6 wherein each of said first and second beams include a gapped section along the lengths thereof, further including a bridge bracket for fixedly interconnecting said first and second beams to said top surface of said base plate adjacent said respective gapped sections.

8. An assembly as set forth in claim 6 wherein said second beam is tubular.

9. An assembly as set forth in claim 8 wherein said second beam has a generally circular cross-section.

10. An assembly as set forth in claim 9 wherein said first beam has a predetermined cross-sectional outer diameter, and said second beam has a cross-sectional outer diameter less than said predetermined outer diameter of said first beam.

11. An assembly as set forth in claim 1 further including a hinge extending from said base plate for pivoting said base plate relative to a floor surface of the vehicle.

12. An assembly af set forth in claim 11 wherein said hinge includes an elongated shaft.

13. An assembly as set forth in claim 12 wherein said hinge includes a strap surrounding said shaft and operatively attached to said base plate.

14. An assembly as set forth in claim 13 wherein said hinge includes a foot extending from said shaft.

15. An assembly as set forth in claim 1 further including a latch for releasably attaching said base plate to a floor surface of the vehicle.

16. An assembly as set forth in claim 15 wherein said latch includes a release strap.

17. A side impact resistant seat cushion for a vehicular seat assembly, said seat cushion comprising:

a base plate having a top surface bounded by a left end and a right end and a front edge and a rear edge;

a foam pad disposed over said top surface of said base plate;

a fabric covering disposed over said foam pad and operatively connected adjacent said right and left ends and said front and rear edges of said base plate;

said base plate including beam means extending laterally substantially from said left end to said right end thereof for rigidifying said base plate to increase resistance to buckling under side impact loading thereby improving passenger safety;

said beam means including a first beam substantially enveloped in said foam pad and a second beam parallel to and spaced from said first beam;

said first and second beams supported between a right bracket extending generally perpendicularly from said right end of said base plate, and a left bracket extending generally perpendicularly from said left end of said base plate; and

wherein each of said first and second beams include a gapped section along the lengths thereof, further including a bridge bracket for fixedly interconnecting said first and second beams to said top surface of said base plate adjacent said respective gapped sections.

18. An assembly as set forth in claim 17 wherein said first beam is tubular and has a generally circular cross-section.

19. An assembly as set forth in claim 18 wherein said second beam is tubular and has a generally circular cross-section.

20. An assembly as set forth in claim 19 wherein said first beam has a predetermined cross-sectional outer diameter, and said second beam has a cross-sectional outer diameter less than said predetermined outer diameter of said first beam.

21. An assembly as set forth in claim 20 wherein the perpendicular spacing between said second beam and said top surface is less than the perpendicular spacing between said first beam and said top surface.