Releasable coupling for display unit extension bar

Details Releasable coupling for display unit extension bar Releasable coupling for display unit extension bar

1978-06-19

1980-03-04

Sakran, Victor N.

Supports: cabinet structure

With movable components

Continuously housed

248412, 403105, 312205, A47B 5700, F16M 1100

Patent

active

041914384

ABSTRACT:
A visual display rack includes an extension bar vertically slidable in a hollow standard. A one way clutch mechanism allows the bar to be raised but unless released, locks the bar against downward movement in order to support the load placed upon the bar. The clutch mechanism is released by a button inconspicuously located at the top of the bar. The entire clutch mechanism is carried by the extension bar. The standard is not in any manner altered for cooperation with the mechanism.

REFERENCES:
patent: 389005 (1888-09-01), Peck
patent: 390381 (1888-10-01), Luetke
patent: 439411 (1890-10-01), Luetke
patent: 1418329 (1922-06-01), Schade
patent: 1447519 (1923-03-01), Schade
patent: 1795747 (1931-03-01), Viken
patent: 2042443 (1936-05-01), Buckstone
patent: 2747824 (1956-05-01), Darnell, Jr.
patent: 2806723 (1957-09-01), Fairclough
patent: 4113222 (1978-09-01), Frinzel

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