Chairs and seats – Headrest – Adjustable rectilinearly vertically
Patent
1977-02-24
1978-12-05
Mitchell, James C.
Chairs and seats
Headrest
Adjustable rectilinearly vertically
108146, 248410, 248411, 248412, 297391, A47C 110
Patent
active
041282744
ABSTRACT:
A clamping device for medical apparatus includes a clamping member which act under the influence of spring bias force to permit upward displacement of the apparatus with minimal force and downward displacement of the apparatus when a predetermined applied force is exceeded. One handed adjustment of the apparatus position is thus enabled.
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patent: 153014 (1874-07-01), Bamseyer
patent: 376016 (1888-01-01), Stuck
patent: 848991 (1967-04-01), Harvey
patent: 1859223 (1932-05-01), Stevenson
patent: 2392477 (1946-01-01), Holm
patent: 3715997 (1973-02-01), Barth
patent: 3730589 (1973-05-01), Lane
patent: 3735136 (1973-06-01), Snurr
Haken Jack E.
Mitchell James C.
U.S. Philips Corporation
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