Seatback frame

• US 5,040,848 A
• Filed: 05/15/1990
• Issued: 08/20/1991
• Est. Priority Date: 05/23/1989
• Status: Expired due to Fees

• Current Assignee: Ikeda Bussan Co., Ltd. (Johnson Controls International plc)
• Original Assignee: Ikeda Bussan Co., Ltd. (Johnson Controls International plc)
• Inventors: Yamauchi, Yoshihiko, Irie, Hideki
• Primary Examiner(s): Cranmer, Laurie K.
• Application Number:
  US07/523,610
• Time in Patent Office: 462 Days
• Field of Search: 297/452, 297/460, 297/183, 297/410
• US Class Current: 297/452.31
• CPC Class Codes: A47C 7/40 for the back
• CPC Class Codes: A47C 7/46 with special, e.g. adjustable , lumbar region support profile; "Ackerblom" profile chairs

Abstract

A seatback frame is disclosed as having an inverted-U-shaped frame member including an elongated and generally horizontal upper member and an elongated side member extending generally downwardly from each extremity of the upper member. A side panel is secured to and extends generally upwardly along and forwardly from a lower portion of each side member. A lumbar supporting panel extends laterally between, and is supported by, the side panels. The lumbar supporting panel has a central portion extending generally upwardly and is secured to a central portion of the upper member.

Claims

1. A seatback frame comprising:

an inverted-U-shaped frame member including an elongated and generally horizontal upper member and an elongated side member extending generally downwardly from each extremity of the upper member; and

a lumbar supporting panel extending laterally between and being secured to a lower portion of each side member, the lumbar supporting panel having a central portion extending generally upwardly and being secured to a central portion of the upper member.

3. The seatback frame as defined by claim 1 or 2, wherein the U-shaped frame member comprises a single piece of tubing.

4. The seatback frame as defined by claim 3, wherein the lumbar supporting panel comprises a resilient material.

5. The seatback frame as defined by claim 3, further including at least one headrest bracket secured to the upper member to receive and hold a headrest support.

6. The seatback frame as defined by claim 3, further including a grip bracket secured to the frame member to mount a passenger assist grip thereto.

2. A seatback frame comprising:

an inverted-U-shaped frame member including an elongated and generally horizontal upper member and an elongated side member extending generally downwardly from each extremity of the upper member;

a side panel secured to and extending generally upwardly along and forwardly from a lower portion of each side member; and

a lumbar supporting panel extending laterally between and being secured to each side panel, the lumbar supporting panel having a central portion extending generally upwardly and being secured to a central portion of the upper member, the lumbar supporting panel being forwardly spaced from the side members by the side plates.