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Title: Reduced energy and volume air pump for a seat cushion

Abstract

An efficient pump system for transferring air between sets of bladders in a cushion. The pump system utilizes a reversible piston within a cylinder in conjunction with an equalizing valve in the piston which opens when the piston reaches the end of travel in one direction. The weight of a seated user then forces air back across the piston from an inflated bladder to the previously deflated bladder until the pressure is equalized. In this fashion the work done by the pump is cut in half. The inflation and deflation of the different bladders is controlled to vary the pressure on the several pressure points of a seated user. A principal application is for wheel chair use to prevent pressure ulcers.

Inventors:
 [1];  [1];  [2]
  1. Albuquerque, NM
  2. Tijeras, NM
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
871097
Patent Number(s):
5657499
Assignee:
Sandia Corporation (Albuquerque, NM)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
reduced; energy; volume; air; pump; seat; cushion; efficient; transferring; sets; bladders; utilizes; reversible; piston; cylinder; conjunction; equalizing; valve; reaches; travel; direction; weight; seated; user; forces; inflated; bladder; previously; deflated; pressure; equalized; fashion; cut; half; inflation; deflation; controlled; vary; principal; application; wheel; chair; prevent; ulcers; air pump; reduced energy; volume air; /5/297/

Citation Formats

Vaughn, Mark R, Constantineau, Edward J, and Groves, Gordon E. Reduced energy and volume air pump for a seat cushion. United States: N. p., 1997. Web.
Vaughn, Mark R, Constantineau, Edward J, & Groves, Gordon E. Reduced energy and volume air pump for a seat cushion. United States.
Vaughn, Mark R, Constantineau, Edward J, and Groves, Gordon E. Wed . "Reduced energy and volume air pump for a seat cushion". United States. https://www.osti.gov/servlets/purl/871097.
@article{osti_871097,
title = {Reduced energy and volume air pump for a seat cushion},
author = {Vaughn, Mark R and Constantineau, Edward J and Groves, Gordon E},
abstractNote = {An efficient pump system for transferring air between sets of bladders in a cushion. The pump system utilizes a reversible piston within a cylinder in conjunction with an equalizing valve in the piston which opens when the piston reaches the end of travel in one direction. The weight of a seated user then forces air back across the piston from an inflated bladder to the previously deflated bladder until the pressure is equalized. In this fashion the work done by the pump is cut in half. The inflation and deflation of the different bladders is controlled to vary the pressure on the several pressure points of a seated user. A principal application is for wheel chair use to prevent pressure ulcers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

Patent:

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