Safety latch

Details Safety latch Safety latch

1994-09-30

1996-02-06

Lindsey, Rodney M.

Closure fasteners

Clamps

Screw and nut

292DIG65, B65D 4530

Patent

active

054891329

ABSTRACT:
A safety latch for securing a cover on a machine integrating a safety swi with a latching swing bolt. The swing bolt for securing the cover pivots between a latched position and an unlatched position. The switch for energizing and de-energizing the machine is switchable between a closed position and an open position. An interlock flag must be moved to a predetermined position before the latch can be released. Moving the flag to the predetermined position causes the safety switch to open, de-energizing the machine. A portion of the swing bolt obstructs the interlock flag from closing the switch, thus preventing the machine from being energized when the cover is unlatched. The swing bolt is preferably threaded and a nut is provided to clamp the threaded swing bolt in the latched position and secure the cover. A shoulder of the interlock flag prevents the nut from being loosened unless the interlock flag is moved to the predetermined position in which the machine is de-energized.

REFERENCES:
patent: 922508 (1909-05-01), Puffer
patent: 1234133 (1917-07-01), Cole
patent: 3655926 (1972-04-01), Meermans
patent: 3907157 (1975-09-01), Beattie
patent: 4825027 (1989-04-01), Yoon

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