The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1991
Filed:
Mar. 15, 1990
William G Fenner, Sr, Richmond, VA (US);
E. R. Carpenter Company, Inc., Richmond, VA (US);
Abstract
A laminated foam mattress overlay for preventing the formation of decubitus ulcers in bedridden individuals. The mattress overlay includes an upper layer of polyurethane foam laminated to a base layer of a different polyurethane foam. The upper lay features a polyurethane foam which is of a higher density than the base layer. The upper layer also includes a higher initial softness ratio than the base layer. The base layer has higher 5, 25 and 65% indentation load deflection values (ILD) than the corresponding ILD values for the upper layer which is attributable to the firmer support provided by the foundation or base layer. The base layer is preferably thicker than the upper layer which can include a checkerboard-like upper surface. The combination of layers provides for a reduction in pressure points in the areas of greatest concern such as the hip and heel. The combination of layers work together to provide firm, comfortable support while distributing loads in the high risk areas of the body to help in avoiding the formation of ulcers.