Waterbed mattress with bellows spring insert

Details Waterbed mattress with bellows spring insert Waterbed mattress with bellows spring insert

1992-03-11

1992-11-03

Grosz, Alexander

Beds

Bedclothing

And means to facilitate changing thereof

5920, A47C 2708

Patent

active

051597250

ABSTRACT:
A spring insert for a waterbed mattress includes a plurality of spring bellows units arranged in upright relation within the mattress. Each bellows unit has a top wall and pleated sidewall which is collapsible from a normal expanded height to a shortened compressed height wherein the internal volume of the bellows unit is substantially reduced. Each bellows unit furthermore has a bleeder opening through one wall so that a compression load exerted on the bellows unit through the mattress top wall is resisted by both spring action and hydraulic action of the bellows units. The bellows units may be interconnected to form upper and lower sections arranged in stacked relation. Stacked pairs of upper and lower bellows units may be arranged in fluid communication to define joint hydraulic chambers.

REFERENCES:
patent: 2434641 (1948-01-01), Burns
patent: 3261037 (1966-07-01), Cermak et al.
patent: 3262137 (1966-07-01), Beckman et al.
patent: 3280410 (1966-10-01), Probst et al.
patent: 4663789 (1987-05-01), Smith
patent: 4750959 (1988-06-01), Jomenning et al.
patent: 4827546 (1989-05-01), Cvetkovic
patent: 4864670 (1989-09-01), Woll et al.
patent: 5060328 (1991-10-01), Larson

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