Back support

• US 4,108,492 A
• Filed: 10/18/1974
• Issued: 08/22/1978
• Est. Priority Date: 10/18/1974
• Status: Expired due to Term

• Current Assignee: Billy E. Kirby
• Original Assignee: Billy E. Kirby
• Inventors: Kirby, Billy E.
• Primary Examiner(s): Frazier, Roy D.
• Assistant Examiner(s): Lyddane, William E.
• Application Number:
  US05/515,986
• Time in Patent Office: 1,404 Days
• Field of Search: 297/284, 297/252, 297/230, 297/27, 297/352, 297/DIG. 3, 297/218, 297/457, 5/349, 5/348 R
• US Class Current: 297/284.3
• CPC Class Codes: A47C 7/021 Detachable or loose seat cushions
• CPC Class Codes: A47C 7/425 Supplementary back-rests to be positioned on a back-rest or the like
• CPC Class Codes: A47C 7/467 adjustable by fluid means
• CPC Class Codes: Y10S 297/03 Pneumatic

Abstract

A back support having a plurality of individually inflatable cushions extending horizontally across a frame and arranged such that air pressure may be adjusted in individual cushions to provide selective localized support to different areas of the back. A cross brace extends between spaced end frame members to furnish a firm support for each of the individually inflatable cushions to prevent undue deformation of the cushions.

Claims

1. A back support comprising:

a pair of horizontally spaced vertically extending frame members;

vertically spaced horizontally extending frame members;

means securing ends of said horizontally extending frame members to said vertically extending frame members;

flexible front and rear panels secured together adjacent three edges to form a hollow slip cover having an open end;

pockets secured to said front panel of the slip cover forming spaced horizontally extending compartments, each of said compartments being isolated one from the other, said slip cover being positioned over said vertically extending frame members such that each of said horizontally extending frame members is positioned adjacent to and parallel with one of said compartments;

an inflatable cushion in each of said compartments;

means on each cushion to vary pressure in each cushion independently of pressure in the other cushions;

a seat cushion in said slip cover adjacent the open end thereof.