Locks – Operating mechanism – Key
Patent
1995-06-05
1997-04-15
Meyers, Steven N.
Locks
Operating mechanism
Key
70189, 70369, E05B 1516
Patent
active
056198744
ABSTRACT:
A handle lock for use on safe doors and the like is provided including a lock shell, a lock plug, a shaft and a handle. The lock shell is formed with a smooth cylindrical outer surface and a central throughbore adopted to receive the lock plug. To provide for selective rotation of the lock plug within the lock shell, the lock plug includes tumbler means which engage with longitudinal lock grooves formed in the lock shell. A shaft connects the lock plug to a crank which translates the rotary motion of the lock plug into the operation of the door latches. The handle is provided with a mounting throughbore formed with an internal annular ledge. The annular ledge has multiple connecting splines which interlock with complemental connecting splines on an annular flange on the lock plug when the lock plug is inserted into the mounting throughbore. The sides of the complemental positioning splines are tapered so that they will slide out of engagement if a significant force is applied to the handle while the tumbler means are engaged with the locking grooves. The handle is also provided with positioning splines formed on the rear face of the mounting throughbore. These positioning splines engage with complemental positioning splines formed on the face of the lock shell when the handle is turned into either the open or closed position.
REFERENCES:
patent: 2206462 (1940-07-01), Jacobi
patent: 3733865 (1973-05-01), Vorob
patent: 4712400 (1987-12-01), Steinbach
patent: 4773240 (1988-09-01), Foshee
patent: 4998953 (1991-03-01), Wilkin
patent: 5010755 (1991-04-01), Best
Fort Lock Corporation
Lecher Donald J.
Meyers Steven N.
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