Retractible stop having reduced retraction resistance

Details Retractible stop having reduced retraction resistance Retractible stop having reduced retraction resistance

1980-06-20

1983-08-09

Whitehead, Harold D.

Conveyors: power-driven

Conveyor having impinging fluid to feed, shift or discharge...

Having cleaning means

193 32, 193 35A, 193 40, 198633, 335262, B65G 3700

Patent

active

043973868

ABSTRACT:
A retractible stop mechanism is disclosed, for a conveyor system or the like, in which a stop member is moved up and down between a retracted position and a position in which it blocks an article, and a pivoted tension link is connected between the supporting structure and the stop member to provide the reaction force against the force exerted by the blocked article on the stop member, thereby removing frictional resistance to retraction of the stop member. Also, the location of the pivot of the tension link is such that a force component is developed which assists the retracting force acting on the stop member.

REFERENCES:
patent: 2398657 (1946-04-01), McMaster et al.
patent: 2926815 (1960-03-01), Laughter
patent: 2930510 (1960-03-01), Pallissard
patent: 3036731 (1962-05-01), Cozart
patent: 3215241 (1965-11-01), Haefele et al.
patent: 3791555 (1974-02-01), Smith
patent: 3970180 (1976-07-01), Schlottmann et al.
patent: 3990557 (1976-11-01), Carder

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