Inflatable cushion with upstanding pyramidal air cells

• US 5,369,828 A
• Filed: 02/03/1993
• Issued: 12/06/1994
• Est. Priority Date: 02/20/1992
• Status: Expired due to Term

• Current Assignee: Roho Incorporated (Permobil Holding AB)
• Original Assignee: Robert H. Graebe
• Inventors: Graebe, Robert H.
• Primary Examiner(s): Grosz, Alexander
• Application Number:
  US08/012,580
• Time in Patent Office: 671 Days
• Field of Search: 5/654, 5/653, 5/455, 5/469, 5/468, 297/DIG. 3, 297/452.41
• US Class Current: 5/654
• CPC Class Codes: A47C 27/081 of pneumatic type
• CPC Class Codes: A47C 27/10 with two or more independently-fillable chambers
• CPC Class Codes: A47C 27/146 on the outside surface of the mattress or cushion
• CPC Class Codes: A47C 27/18 in combination with inflatable bodies
• CPC Class Codes: A47C 4/54 Inflatable chairs connection of valves to inflatable elastic bodies B60C29/00
• CPC Class Codes: A47C 7/029 of non-adjustable shape adapted to a user contour or ergonomic seating positions
• CPC Class Codes: A61G 5/1043 Cushions specially adapted for wheelchairs
• CPC Class Codes: A61G 5/1045 for the seat portion
• CPC Class Codes: A61G 5/1091 Cushions, seats or abduction devices
• CPC Class Codes: A61G 7/05707 with integral, body-bearing projections or protuberances
• CPC Class Codes: A61G 7/05715 with modular blocks, or inserts, with layers of different material
• CPC Class Codes: Y10S 297/03 Pneumatic

Abstract

An integral inflatable cushion comprises a flexible bottom wall and a plurality of upstanding air cells having flexible generally vertical side walls, said air cells being substantially pyramidal in shape and having a substantially rectangular flexible lower section defined by the vertical side walls and sealed to the bottom wall, and a flexible domed tapered top area connected to the vertical side walls, the side walls of adjacent cells being separated and spaced apart to define lateral and longitudinal paths and being independently upstanding when inflated, and tubing connected to the air cells through the bottom wall to adjust and monitor the air pressure in the cells from beneath the cushion.

Claims

1. An integral inflatable cushion comprising a flexible bottom wall and a plurality of upstanding air cells having flexible generally vertical side walls sealed to the bottom wall, each of said air cells being substantially pyramidal in shape, and having a substantially rectangular shaped lower section defined by the flexible vertical side walls, and a domed tapered upper section formed from side panels connected to the vertical side walls, the vertical side walls of adjacent cells being separated and spaced apart to define lateral and longitudinal paths and being independently upstanding when inflated.

2. The cushion of claim 1 wherein at least a portion of the cells are interconnected through the bottom wall.

3. The cushion of claim 1 wherein the cells are individually sealed to the bottom wall and are not interconnected.

4. The cushion of claim 1 wherein the air cells have substantially square flexible lower sections and the upper sections have substantially trapezoidal panels with substantially flat top areas.

5. A modular cushion construction comprising an inflatable flexible pad formed from a plurality of inflatable flexible air cells which are sealed to and project upwardly from a flexible bottom wall when, inflated, a substantially rigid base having a top surface on which the flexible base of the pad is positioned, passages in the base from the top surface of said base and continuing into and through the base, and tubing positioned in the base passages and connected to the air cells through the bottom wall thereof whereby the air pressure in the cells can be adjusted and monitored from beneath the cushion and at a location remote from the cushion.

6. An integral inflatable cushion comprising a flexible bottom wall and a plurality of upstanding air cells having flexible generally vertical side walls, said air cells being substantially pyramidal in shape and having a substantially rectangular flexible lower section defined by the vertical side walls and sealed to the bottom wall, and a flexible domed tapered top area connected to the vertical side walls, the side walls of adjacent cells being separated and spaced apart to define lateral and longitudinal paths and being independently upstanding when inflated, and tubing connected to the air cells through the bottom wall to adjust and monitor the air pressure in the cells from beneath the cushion.

7. The cushion of claim 6 wherein the air cells have substantially square flexible lower sections and the upper sections have substantially trapezoidal panels with substantially flat top areas.

8. In an inflatable cushion formed from a plurality of inflatable flexible air cells which project upwardly from a flexible bottom wall when inflated and rest on a relatively rigid base, the improvement comprising tubing connected to the air cells through the flexible bottom wall and through the relatively rigid base to adjust and monitor the air pressure in the cells from beneath the cushion in a remote location through the tubing.