Elongatable support

Details Elongatable support Elongatable support

1992-04-21

1993-02-16

Foss, J. Franklin

Supports

Props and braces

Adjustable length

248412, 254 95, 403109, A47F 500

Patent

active

051864290

ABSTRACT:
An elongatable support has a lever actuating a fork for displacing a roller out of wedging engagement between an inclined surface of a head on a tube from which a bar can telescopingly extend, and a surface of this bar. To prevent inadvertent actuation of the lever, an abutment is interposed between the lever and the tube and can be withdrawn manually against gravitational and/or spring force to allow actuation of the lever.

REFERENCES:
patent: 3467352 (1969-09-01), Bohler
patent: 3583743 (1971-06-01), Newell
patent: 4083530 (1978-04-01), Linnepe
patent: 4234151 (1980-11-01), John
patent: 4360283 (1982-11-01), Psotta
patent: 4375934 (1983-03-01), Elliott
patent: 4434970 (1984-03-01), Boland
patent: 4526334 (1985-07-01), Rantakart

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