Reduced energy and volume air pump for a seat cushion

Details Reduced energy and volume air pump for a seat cushion Reduced energy and volume air pump for a seat cushion

1996-01-11

1997-08-19

Grosz, Alexander

Beds

Support for users body or part thereof

Removable support specially adapted for seating

5713, 5940, 2972846, 29745241, 297DIG3, A47C 2710, A61G 7057

Patent

active

056574991

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.

REFERENCES:
patent: 4707027 (1987-11-01), Horvath et al.
patent: 4938528 (1990-07-01), Scott
patent: 5163737 (1992-11-01), Navach et al.
patent: 5500965 (1996-03-01), Hannagan et al.

Affiliated with

Also associated with

Rating

Reduced energy and volume air pump for a seat cushion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduced energy and volume air pump for a seat cushion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced energy and volume air pump for a seat cushion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1096661