Security lock mechanism
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United States of America Patent
Stats
-
Apr 3, 1990
Grant Date -
N/A
app pub date -
Apr 18, 1988
filing date -
Apr 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Multiple embodiments of a security lock mechanism being adapted for both deadlocked and slam-lock operation are disclosed with different combinations of features including a housing, a movable locking bolt, a rotatable cam having a pin engaged with a slot in the bolt and a centering device such as a remote drive unit or double-acting spring mechanism coupled with the rotatable cam by a lost motion coupling for facilitating slam-lock and deadlocked operation of the security lock mechanism. With the remote drive unit being a pneumatically operated cylinder and piston, the piston is preferably of split construction to facilitate overriding operation of the remote drive unit, for example, by a key.
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