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US 5,845,352 AGranted
Foam-air hybrid cushion and method of making same
AssigneeRoho, Inc.
InventorsWinfield R. Matsler, Kurt Graebe
Life of this patent
Estimating the term…
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AssigneeRoho, Inc.
InventorsWinfield R. Matsler, Kurt Graebe
Estimating the term…
A composite foam base air cell module cushion having a water resistant skin, a contoured foam base designed to relieve pressure on the trochanters and the ischia and an air cell module having two sets of air cells, each partially filled, positioned inside the foam base in a chamber beneath the rear of the base. The skin is of two layer construction with a two-way stretch outer layer and a water impervious inner layer. The bottom of the base is covered with a water impervious sheet and the edges are secured to the edges of the top skin covering. The air cell is made by placing the preformed top into molds smaller in depth than the air cells to partially collapse the air cells before a base is applied to the top to close the open ends of the air cells and trap air therein.
A cushion comprising an expanded foam base having a contoured top surface to accommodate a person in a seated position thereon and provided with a hollowed out chamber in the bottom surface positioned beneath the rear portion of the top surface and beneath the buttocks of a person positioned on the top surface, the chamber defined in part by rear and side walls, the said rear and side walls being too soft and thin to prevent the user from bottoming out when seated on the cushion, a separate independent sealed air cell module loosely positioned in the chamber, the air cell module comprising a flexible base and flexible upstanding air cells, at least some of which are pneumatically interconnected, and a cover positioned on the base bottom surface over the chamber to retain the air cell module loosely in the chamber and restrict access to the air cell module.
A cushion comprising an expanded foam base having a contoured top surface to accommodate a person in a seated position thereon and provided with at least one hollowed out area in the bottom surface, the hollowed out area being positioned beneath the rear portion of the top surface and beneath the buttocks area of a person positioned on the top surface, and an air cell module positioned in the said hollowed out area, the air cell module comprising a bottom wall and an upstanding air cell area comprising a series of independent upstanding air cells and having flexible top and side walls, the air cell area being filled with air to provide flexible support for the user's buttocks.
The method of making a sealed cell cushion which is usable over a wide variety of atmospheric pressures comprising the steps of:
Dependencies are inferred from the claim text.