Support device

• US 3,148,391 A
• Filed: 11/24/1961
• Issued: 09/15/1964
• Est. Priority Date: 11/24/1961
• Status: Expired due to Term

• Current Assignee: John K. Whitney
• Original Assignee: John K. Whitney
• Inventors: Whitney, John K.
• Application Number:
  US04/154,463
• Time in Patent Office: 1,026 Days
• US Class Current: 5/422
• CPC Class Codes: A61G 7/05776 with at least two groups of alternately inflated chambers
• CPC Class Codes: Y10S 297/03 Pneumatic
• CPC Class Codes: Y10S 5/932 Seals and sealing methods, for plastics

Claims

1. A CYCLING DIFFERENTIAL BODY PRESSURE AREA SUPPORT DEVICE COMPRISING A BODY SUPPORT PAD HAVING AT LEAST A FIRST EXPANDABLE CELL OF A GIVEN EXPANDED SIZE AND A SPACED SECOND EXPANDABLE CELL HAVING A LARGER EXPANDED SIZE, SAID CELLS BEING SEALED FROM ONE ANOTHER, A FLUID PRESSURE COMPRESSOR CONNECTED TO SAID FIRST CELL TO MAINTAIN CONTINUOUS PRESSURE THEREIN, A VALVE INTERCONNECTING SAID SECOND CELL AND THE COMPRESSOR FORMED TO OPERATE BETWEEN A CLOSED POSITION WHEREAT SAID COMPRESSOR IS COUPLED TO THE SECOND CELL AND AN EXHAUSE POSISITON WHEREAT THE SECOND CELL IS COUPLED OT THE ATMOSPHERE, AND A TIMING DEVICE COUPLED TO SAID VALVE TO PROVIDE OPERATION THEREOF FOR CYCLIC PRESSURIZING AND EXHAUSTING IF SAID SECOND CELL TO CHANGE THE PRIMARY BODY SUPPORT PRESSURE AREAS BETWEEN SAID SECOND EXPANDED CELL AND SAID FIRST EXPANDED CELL.