Compound lock

Details Compound lock Compound lock

2007-10-25

2009-12-08

Barrett, Suzanne D (Department: 3673)

Locks

Operating mechanism

Combination and key

C070S213000, C070S312000, C070S134000, C070S37900R

Reexamination Certificate

active

07628047

ABSTRACT:
A compound lock has a common housing, a latch assembly, a supplementary lock and a combination lock. The latch assembly is rotatably attached to and protrudes from the common housing. The combination lock and supplementary lock are mounted in the common housing and engage the latch assembly, and either may rotate the latch assembly. Thus, in general, people may unlock the compound lock using either the combination lock or the supplementary lock with a key when the combination is forgotten without breaking the compound lock.

REFERENCES:
patent: 2035781 (1936-03-01), Bell
patent: 2424396 (1947-07-01), Heyer
patent: 3383886 (1968-05-01), Hermann
patent: 3395557 (1968-08-01), Berkowitz
patent: 3572069 (1971-03-01), Junkunc
patent: 4726204 (1988-02-01), Peyronnet
patent: 6508089 (2003-01-01), Tsai
patent: 6513356 (2003-02-01), Yang
patent: 6708538 (2004-03-01), Walby
patent: 7266981 (2007-09-01), Flory et al.
patent: 7367207 (2008-05-01), Yang
patent: 7444844 (2008-11-01), Lee
patent: 7458239 (2008-12-01), Ma
patent: 2002/0088256 (2002-07-01), Taylor et al.
patent: 2005/0166649 (2005-08-01), Meekma
patent: 2006/0248932 (2006-11-01), Yang

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