Supports – Suspended supports – Adjustable
Patent
1976-07-14
1978-02-14
Parsons, Jr., Marion
Supports
Suspended supports
Adjustable
108 67, 403 15, 403104, 248354H, 248125, 248404, 248412, B42F 1300, A47B 106
Patent
active
040734560
ABSTRACT:
A manual suspension support, in which a pair of tubes are telescoped using a vacuum source. A slidable piston in a cylinder is selectively brakable by manipulation of a handle which also carries a valve operable to vary the vacuum in the cylinder.
REFERENCES:
patent: 874836 (1907-12-01), Dodge et al.
patent: 2453855 (1948-11-01), Oliver
patent: 2907598 (1959-10-01), Hart
patent: 2938699 (1960-05-01), Bellmann
patent: 3048360 (1962-08-01), Foley
patent: 3191904 (1965-06-01), Karapita
patent: 3533583 (1970-10-01), Azim
patent: 3807574 (1974-04-01), Lanza
Karapita Alexander D.
Orr James D.
Karapita Alex D.
Parsons, Jr. Marion
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