Waterbed and frame with pliant supporting sides

Details Waterbed and frame with pliant supporting sides Waterbed and frame with pliant supporting sides

1977-05-02

1978-08-22

Nunberg, Casmir A.

Beds

Bedsteads

Element or detail

5350, 5371, A47C 2708

Patent

active

041077997

ABSTRACT:
A waterbed is disclosed which has a frame with a self-supporting bulkhead forming a safety lining. The bulkhead comprises two connected wedge-shaped members which are made of pliant material, and are held in place by a resilient membrane. A base member is anchored to a rigid backing or baseboard. A unitary resilient nonporous membrane is fastened to the edges of the baseboard and drawn tautly across the baseboard over the base member. A lateral member rests upon the base member and is sealed to the underlying membrane at the inwardly disposed margin of the lateral member, which is outboard of the inner boundary of the base member. The lateral member comprises a polyvinylchloride or like nonporous thermoplastic tube enclosing a polyurethane or like pliant member. The waterbed mattress comprises a bladder having a wedge-shaped margin conforming with the inwardly disposed wedge-shaped edge of the frame bulkhead. The corners of the mattress are tapered to conform with countersunk, inwardly disposed corners of the frame. The membrane and covering material of the frame and mattress are preferably made of nonporous thermoplastic materials suitable for dielectric heat sealing. A waterbed and waterbed frame manufactured according to the invention minimizes the lateral sag which accompanies the lateral loading on the bulkhead because tension is uniformly maintained by the underlying membrane stretched across the base member. Further, the sealed lining of the bulkhead forms the safety lining required by law.

REFERENCES:
patent: 3742531 (1973-07-01), Alsbury
patent: 3789442 (1974-02-01), Tobinick
patent: 4015299 (1977-04-01), Tinnel
Oil Bed, Apr. 1976, p. 87 by Stepley.

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