Flush-mounted crank

Details Flush-mounted crank Flush-mounted crank

1992-06-09

1993-07-27

Lorence, Richard M.

Horizontally supported planar surfaces

Vertically adjustable

108147, 74547, 74557, A47B 900, G05G 110

Patent

active

052302903

ABSTRACT:
The invention is a crank which is flush-mounted into a work surface and provides for raising or lowering a vertically adjustable work surface. The crank can be raised from its stored position to a fixed position above the work surface and unfolded providing for rotating the crank to raise or lower the work surface by causing an adjustment screw to thread in or out of an adjustment nut. The crank is returned to its stored position or flush-mounted by folding the crank and pressing downward.

REFERENCES:
patent: 2165060 (1939-07-01), Krug
patent: 2721106 (1955-10-01), Chaney
patent: 2808303 (1957-10-01), Frank
patent: 3044478 (1962-07-01), Russell
patent: 3383945 (1968-05-01), Carella
patent: 3967511 (1976-07-01), Breitschwerdt
patent: 4023858 (1977-05-01), Beinert et al.
patent: 4222602 (1980-09-01), Kouth
patent: 4487558 (1984-12-01), Troutner
patent: 4515087 (1985-05-01), Kurrasch
patent: 4619208 (1986-10-01), Kurrasch
patent: 4811623 (1989-03-01), Tomiser, Jr.
patent: 4881471 (1989-11-01), Schwartz et al.
patent: 4969403 (1990-11-01), Schwartz et al.
patent: 4987835 (1991-01-01), Schwartz et al.
patent: 5083514 (1992-01-01), Schwartz et al.

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