Beds – Bedclothing – And means to facilitate changing thereof
Patent
1989-02-01
1990-02-20
Trettel, Michael F.
Beds
Bedclothing
And means to facilitate changing thereof
5451, 5464, A47C 2708
Patent
active
049013866
ABSTRACT:
An air adjustable waterbed mattress which is adapted to support one or more persons on a sleeping surface. An air chamber unit is contained within a liquid-filled bladder and extends from one side of the bladder toward the other. On inflation, the air chamber unit supports a bladder-formed sleeping surface with the amount of support being determined by the amount of inflation. One or more air chamber units may be selectively positioned within the bladder and each unit is preferably formed of multiple chambers.
REFERENCES:
patent: 2748399 (1956-06-01), Rockoff
patent: 3456270 (1969-07-01), Weinstein et al.
patent: 3803647 (1974-04-01), Reswick
patent: 4094025 (1978-06-01), Nystad
patent: 4109333 (1978-08-01), Zmiarovich
patent: 4169295 (1979-10-01), Darling
patent: 4310936 (1982-01-01), Benjamin
patent: 4558476 (1985-12-01), Linder
patent: 4751757 (1988-06-01), Moreno
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