Beds – Bedclothing – And means to facilitate changing thereof
Patent
1983-12-27
1985-08-06
Grosz, Alexander
Beds
Bedclothing
And means to facilitate changing thereof
5451, A47C 2708
Patent
active
045326622
ABSTRACT:
A modified waterbed is provided comprising a liquid-containing mattress or bladder, a resiliently compressible, elastomeric material, porous as to the liquid forming a resilient insert disposed within the bladder, and a resilient base positioned at least in part beneath the bladder and having properties that are similar to the properties of the resilient insert. The resilient insert and resilient base have as one of those properties a function defined as displacement force divided by penetration depth, and that property of each is substantially similar to the other. In a preferred embodiment the bladder will be surrounded laterally with a resilient perimeter member to laterally contain the bladder, said resilient perimeter member being stiffer in terms of the displacement function divided by penetration depth than the similarly defined function of both the resilient base and resilient insert. The preferred embodiment also includes a support structure and the use of a convoluted foam as the material utilized for the resilient insert.
REFERENCES:
patent: 3574873 (1971-04-01), Weinstein
patent: 3742531 (1973-07-01), Alsbury et al.
patent: 4167049 (1979-09-01), Fogel
patent: 4187566 (1980-02-01), Peterson
patent: 4245361 (1981-01-01), Evanson
patent: 4370768 (1983-02-01), Saloff
patent: 4411033 (1983-10-01), Morgan
Grosz Alexander
Van Der Wall Robert J.
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