Push-button padlock with secondary key

Details Push-button padlock with secondary key Push-button padlock with secondary key

1987-03-06

1988-06-21

Wolfe, Robert L.

Locks

Portable

Padlocks

70285, 70298, E05B 3714

Patent

active

047518308

ABSTRACT:
The application discloses a push-button lock to which a secondary key is added to the locking system for use when the button combination for a lock is forgotten or not readily available. Unlocking with the secondary key is accomplished by the use of a toothed trigger plate and a gear system. The secondary key turns the gear which in turn rotates the trigger plate. A secondary locking pin secured to the trigger plate rotates with the movement of the trigger plate and releases the shackle. When unlocked by the push-button combination, the shackle is released and the trigger plate is separated from the gear. The toothed end of the trigger plate again aligns with the gear when returned to the locked position. In the preferred embodiment alternative, an elongated flange member having a slot in which a pin on the trigger plate travels is employed in place of the system.

REFERENCES:
patent: 972171 (1910-10-01), Dupont
patent: 4476698 (1984-10-01), Treslo
patent: 4660394 (1987-04-01), We

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