US 4,751,830 A · Push-button padlock with secondary key

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.

Claims20

Dependent claims

A push-button combination lock having in operative combination:

(a) a housing and a shackle receivingly engageable therewith;
(b) a push-button combination assembly disposed in said housing having means for permitting said shackle to be reciprocably openable upon activation of one or more push-buttons thereof;
(c) a keyed cylinder assembly disposed in said housing;
and
(d) means for permitting said shackle to be released for opening independent of said push-button assembly by keyed rotation of said cylinder assembly.

2 more elements

A push-button combination lock having in operative combination:

(a) a housing and a shackle receivingly engageable therewith;
(b) a push-button combination assembly disposed in said housing having means for permitting said shackle to be reciprocably openable upon activation of one or more push-buttons thereof;
(c) a keyed cylinder assembly disposed in said housing;
(d) means for permitting said shackle to be released for opening independent of said push-button assembly by keyed rotation of said cylinder assembly;
(e) said push-button combination assembly shackle openable means includes:
(i) a reciprocable member having a plurality of projecting tabs in a spaced array,
(ii) an array of buttons comprising:
(1) a plurality of buttons of a first configuration, each having a slot therein alignable with a projecting tab to permit said tab to reciprocate without engaging said button when said first button is disposed in a first, raised position, and to block movement of said tab and said reciprocable member when said first button is disposed in a second, depressed position, and
(2) at least one button of a second configuration having a slot therein alignable with a projecting tab to permit said tab to reciprocate without engaging said second button when said second button is disposed in a second, depressed position, and to block movement of said tab and said reciprocable member when said second button is disposed in a first, raised position;
(f) a shackle retainer member secured to said reciprocable member;
and
(g) said shackle, said reciprocable member and said shackle retainer member being reciprocable to an open position when said second configuration buttons in said array are depressed.

9 more elements

A push-button combination lock having in operative combination:

(a) a housing and a shackle receivingly engageable therewith;
(b) a push-button combination assembly disposed in said housing having means for permitting said shackle to be reciprocably openable upon activation of one or more push-buttons thereof;
(c) a keyed cylinder assembly disposed in said housing;
(d) means for permitting said shackle to be released for opening independent of said push-button assembly by keyed rotation of said cylinder assembly;
(e) said push-button combination assembly shackle openable means includes a shackle retaining member secured to said reciprocable member;
(f) a trigger plate member having a locking pin member rotatably mounted in said shackle retaining member;
(g) said keyed cylinder assembly includes a flange which is rotatable upon rotation of said cylinder by turning said key;
(h) said flange having means engaging said trigger plate member to rotate said trigger plate and locking pin upon turning said key;
and
(i) said locking pin and said shackle being adapted to releasably engage said shackle in a first rotational position of said locking pin and disengage said shackle so said shackle is openable at a second rotational position of said locking pin.

7 more elements

Dependencies are inferred from the claim text.

Push-button padlock with secondary key

Life of this patent

Push-button padlock with secondary key

Life of this patent

Abstract

Claims20