Spring insert for cushioning insert

Details Spring insert for cushioning insert Spring insert for cushioning insert

1992-11-03

1994-08-09

Grosz, Alexander

Beds

Bedsteads

Having bottom

5476, 267122, A47C 2304, A47C 23047, A47C 2305, A47C 23053

Patent

active

053353803

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: 2897520 (1959-08-01), Bradford
patent: 3261037 (1966-07-01), Cermak et al.
patent: 3262138 (1966-07-01), Knittel
patent: 3276048 (1966-10-01), Beckman
patent: 3280410 (1966-10-01), Probst et al.
patent: 4827546 (1989-05-01), Cvetkovic
patent: 5060328 (1991-10-01), Larson

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