Beds – Bedclothing – And means to facilitate changing thereof
Patent
1983-09-01
1985-09-17
Grosz, Alexander
Beds
Bedclothing
And means to facilitate changing thereof
5455, A47C 2708
Patent
active
045411360
ABSTRACT:
An inflatable air cushion has a base and air cells arranged in rows upon and projecting away from the base, with the outer ends of the air cells forming a supporting surface. The base and air cells are formed from a flexible elastomeric material and are in communication through the base, so that when some of the air cells are deflected by a supported load, all the air cells nevertheless remain at the same internal pressure. Thus, those air cells that are against the load exert equal forces on the load, irrespective of the amount of deflection. Adjacent air cells when inflated are adapted to contact each other along their sides so as to provide a generally continuous supporting surface. To this end, each air cell when deflated has four fins arranged symmetrically about its axis, with each fin having spaced apart side walls. The side walls of adjacent fins are connected near the center of the air cell to provide depressions that open out of the air cells. Between each depression and the base is an inclined wall, and the four inclined walls serve to provide the air cell with a square pedestal. When the air cells are pressurized, the side walls of their fins and the inclined pedestal walls move outwardly and contact the opposite side walls and pedestal walls on adjacent air cells, so the load supporting surface is generally uniform. The air cells and connecting portions of the base are formed on a mandrel which is dipped in a latex solution.
REFERENCES:
patent: 3605145 (1971-09-01), Graebe
patent: 3870450 (1975-03-01), Graebe
patent: 4005236 (1977-01-01), Graebe
patent: 4279044 (1981-07-01), Douglas
patent: 4422194 (1983-12-01), Viesturs et al.
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