Mattress position adjustment device

Details Mattress position adjustment device Mattress position adjustment device

1990-01-02

1990-10-09

Trettel, Michael F.

Beds

Sofa bed

Reverting back

5 77, 5433, A61G 706

Patent

active

049612360

ABSTRACT:
The present invention provides a mattress position adjustment device. The device includes a lifting frame and a support frame. Each free end of the lifting frame is pivotally joined to an upper crossbar of the support frame by a hinge. The upper crossbar has an elongated opening through which extends a hydraulic device that is pivotally joined to and directly connected to the lifting frame.

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patent: 4613997 (1986-09-01), Langdale
patent: 4667354 (1987-05-01), Carey
patent: 4751755 (1988-06-01), Carey

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