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US 4,222,137 AGranted
Internal pressure adjustable bed
AssigneeNihon Bed Manufacturing Company, Ltd.
InventorNobuo Usami
Life of this patent
Estimating the term…
Abstract
A bed adjustable in hardness distribution of its surface. An elastic member is interposed between a surface side member and a bottom plate of the bed, and the bottom plate is divided in the direction of its plane and each of the bottom plates thus divided is made vertically adjustable to allow the internal pressure of the said elastic member to be changed, so that the internal pressure of each part against the urging force from the surface is changed and the depression amount of the bed surface becomes uniform.
Claims10
An internal pressure-adjustable bed comprising:
- a plurality of base plates arranged longitudinally of the bed and extending transversely between the sides thereof, each of said base plates being individually movable vertically;
- a resilient mattress carried on said base plates;
- means for constraining the upper surface of said mattress to maintan same in a substantially horizontal disposition;
- and means for effecting selective vertical movement of said base plates to thereby enable selective longitudinal regulation of the internal pressure of said resilient mattress.
1 more element
Dependencies are inferred from the claim text.