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US 2005/0005363 A1Published application
Pressure adjustable foam support apparatus
OwnerGualtiero Giori, Giori Janineinventors
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Abstract
The present invention concerns a mattress-like apparatus whose firmness is adjustable by the user. This goal is attained by enclosing the polyurethane foam core of the mattress within an airtight cover chamber, and varying the negative air pressure (vacuum) applied into it. As a result, the mattress is adjustable as to firmness measured in terms of Indentation Force Deflection (IFD, or spring-back force) and support (density).
Claims11
1-11. (cancelled).
A mattress-like support apparatus comprising
- a core of open-cell, self-inflating flexible polyurethane foam, said polyurethane foam core having an Indentation Force Deflection value within a range of 22 to 50 at standard atmospheric pressure;
- and
- an airtight cover chamber enclosing said foam core, said airtight cover chamber having at least one valve arrangement for evacuating air;
- characterized in that said mattress-like support apparatus is operated by the user at sub-atmospheric pressure, in that said foam core has a thickness of at least four inches at standard atmospheric pressure, and in that said Indentation Force Deflection value decreases while air pressure within said polyurethane foam core is lowered.
1 more element
Dependencies are inferred from the claim text.