Combination lock capable of being opened by a key

Details Combination lock capable of being opened by a key Combination lock capable of being opened by a key

2005-06-14

2005-06-14

Walsh, John B. (Department: 3676)

Locks

Portable

Padlocks

C070S021000, C070S319000, C070S284000, C070SDIG071

Reexamination Certificate

active

06904776

ABSTRACT:
Disclosed is a combination lock wherein responsive to unlocking the lock, use a tool to press the push button to advance a push button and a locking pin inside until a passage is clear from a ledge, insert a pointed portion of the tool into an indentation on a push button, rotate the push button to engage a projection with a tooth, further press the push button to advance a locking pin inside and matingly engage the push button with the locking pin, and rotate the push button and the locking pin until the ledge inserts into the passage with a spring biased pin being entered into an aperture of a sliding seat for locking during an operation of inhibiting the lock from being opened by a key.

REFERENCES:
patent: 5715709 (1998-02-01), Lai
patent: 6012309 (2000-01-01), Liu
patent: 6029481 (2000-02-01), Lai
patent: 6035672 (2000-03-01), Lai
patent: 6474116 (2002-11-01), Lai
patent: 6539761 (2003-04-01), Yang
patent: 6615626 (2003-09-01), Yu et al.
patent: 6675614 (2004-01-01), Lai
patent: 6708534 (2004-03-01), Ruan
patent: 6729166 (2004-05-01), Lai

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