Door-opener apparatus

Details Door-opener apparatus Door-opener apparatus

1980-08-14

1982-08-03

Cherry, Johnny D.

Material or article handling

Horizontally swinging load support

Swinging about pivot

B25J 502

Patent

active

043425356

ABSTRACT:
An apparatus having a pivoted arm mounted on a base for seizing and releasing an article that is hinged at one end and which includes a control link that maintains a fixed length while the arm moves the article about its hinged end between preset positions, but changes its length and thereby provides a signal indicating that the arm has seized the article when the latter is moved in a direction opposite to the normal movement.

REFERENCES:
patent: 3160290 (1964-12-01), Wilson
patent: 3703968 (1972-11-01), Uhrich et al.
patent: 3995746 (1976-12-01), Usagida
patent: 3995756 (1976-12-01), Hjelm

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