Variable slant board

Details Variable slant board Variable slant board

1990-09-13

1992-04-28

Chen, Jose V.

Horizontally supported planar surfaces

Tiltable surfaces

Pivotally adjustable about horizontal axis

108 2, A47F 512

Patent

active

051077744

ABSTRACT:
A variable slant work board pivotally mounted to a base such as a table or desk. A winch actuated segmented arm supplies an upward force on the underside of the work board to pivot it upwardly toward the fully raised vertical position. A horizontally disposed expansion spring is attached by cable to the underside of the work board to bias it toward the fully lowered horizontal position. The work board is infinitely adjustable between the vertical and horizontal positions.

REFERENCES:
patent: 1029420 (1912-06-01), Buzby
patent: 1956546 (1934-04-01), Froelich
patent: 3826204 (1974-07-01), Kuhlmann et al.
patent: 3874309 (1975-04-01), Cowley
patent: 3903812 (1975-09-01), Cowley
patent: 4351245 (1982-09-01), Laporte
patent: 4397245 (1983-08-01), Washburn
patent: 4781126 (1988-11-01), Lochridge
patent: 4791873 (1988-12-01), Towfigh

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