Beds – Bedclothing – And means to facilitate changing thereof
Patent
1990-03-16
1991-01-08
Trettel, Michael F.
Beds
Bedclothing
And means to facilitate changing thereof
5447, 5453, 5456, 254 93HP, 254 93R, A61G 704, A47C 2710
Patent
active
049824651
ABSTRACT:
A level-variable supporting apparatus is provided, which is so constituted that: a reversible swelling and contractive substance, which, with a prescribed temperature defined as the boundary, absorbs a swelling solution and then swells at a range of temperature on one side and discharges the swelling solution and then contracts at a range of temperature on the other side, is contained in liquidtight container which is expandable and shrinkable in prescribed directions; a liquid guiding portion to supply the swelling solution to the container and discharge it from the container, and a heating means to heat the substance are provided; and the swelling and contraction of the substance due to the change in the temperature of the substance with the prescribed temperature as the boundary causes the container to expand and shrink in the prescribed directions, thus leading to the change of the supporting position of a supported object supported by the container.
REFERENCES:
patent: 3600727 (1971-08-01), All
patent: 3721232 (1973-03-01), Trenchard
patent: 3858379 (1975-01-01), Graves et al.
patent: 4079915 (1978-03-01), Mountain
patent: 4281425 (1981-08-01), Jacobs
patent: 4371997 (1983-02-01), Matson
patent: 4588229 (1986-05-01), Jay
patent: 4688283 (1987-08-01), Jacobson et al.
patent: 4924634 (1990-07-01), Sulott et al.
Hirokawa Yoshitsugu
Nagata Nobuo
Nippon Zeon Co. Ltd.
Trettel Michael F.
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