Alternating pressure pads

A - Human Necessities – 61 – G

Patent

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Details

A61G 7/057 (2006.01) A47C 27/10 (2006.01)

Patent

CA 2238413

An alternating pressure pad which comprises at least two sets (1, 2) of inflatable cells, an air supply line (7a, 7b) to each set, a pump (8) to circulate pressurised air through a circuit including the sets of cells and to return air from the cells to the pump, valve means (6) for alternately causing inflation and deflation of each set, a sensor pad (3) in said circuit through which pressurised air is passed and detecting means (17) for detecting a reduction in air flow through the sensor pad which is below a predetermined level and for increasing air pressure in said sets of cells to restore the air flow above said predetermined level.

La présente invention concerne un tampon à pression alternative qui comprend au moins deux jeux (1, 2) de cellules gonflables, un tuyau d'arrivée d'air (7a, 7b) pour chaque jeu, une pompe (8) pour faire passer de l'air sous pression dans un circuit comprenant les jeux de cellules et renvoyer l'air des cellules à la pompe, une soupape (6) pour provoquer alternativement le gonflage et le dégonflage de chaque jeu, un tampon capteur (3) dans ce circuit, qu'on fait traverser par de l'air sous pression, et un détecteur (17) servant à détecter une éventuelle baisse du débit d'air à travers le tampon capteur au-dessous d'un niveau déterminé et à augmenter la pression de l'air dans les jeux de cellules pour ramener le débit d'air au-dessus de ce niveau déterminé.

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