Security lock mechanism
AssigneePhelps-Tointon, Inc.
InventorsRaymond B. Bushnell, Larry W. Green
Life of this patent
Estimating the term…
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.
Claims41
A security lock mechanism comprising
- a housing,
- a locking bolt slidably mounted in the housing for sliding movement to an extended position from a retracted position;
- a rotatable cam means operatively coupled with the locking bolt and having first and second relatively rotated positions to permit said bolt to slidingly move to an extended position for deadbolt and slam-lock operation;
- a pneumatically powered means, and
- a lost motion coupling between the pneumatically powered means and the rotatable cam means for facilitating slam-lock and deadlocked operation of the security lock mechanism.
A security lock mechanism comprising
- a housing,
- an elongated locking bolt mounted in the housing for movement along its longitudinal axis and forming a slot extending perpendicularly to the longitudinal axis of the locking bolt,
- a rotatable cam means having its axis of rotation arranged perpendicularly to both the longitudinal axis and slot of the locking bolt,
- a pin secured to the rotatable cam means and extending into the slot,
- means for rotating the rotatable cam means to a deadlocked position with the pin at one end of the slot and in over-center relation to the rotatable cam means with the locking bolt being fully extended and to an open position with the locking bolt being fully retracted, and double acting means coupled with the rotatable cam means tending to maintain the cam means in the slam-lock position.
A security lock mechanism, comprising
- a lock housing,
- a locking bolt,
- (1) supported in said housing,
- (2) for extending through a bolt opening in said housing,
- (3) for extending to a locking position, and
- (4) for moving through said housing to a retracted position;
- guide means for aligning said bolt for linear movement through said opening between said locking and retracted positions;
- rotatable cam means mounted adjacent to said bolt;
- a locking surface on said cam means for securing said bolt in the locking position when said cam means is in a first position and wherein said cam means has a second position permitting movement of said bolt between positions;
- powered means connected to said cam means for moving said cam means between said first and second positions, said powered means
- (1) providing movement to said cam means on movement between positions in one direction, and
- (2) providing lost motion movement to said cam means on movement between positions in the opposite direction.
A security lock mechanism, comprising
- a lock housing,
- a locking bolt,
- (1) supported in said housing,
- (2) for extending through a bolt opening in said housing,
- (3) for extending to a locking position, and
- (4) moving through said housing to a retracted position;
- guide means for aligning said bolt for linear movement through said opening between said locking and retracted positions;
- rotatable cam means mounted adjacent to said bolt;
- a locking surface on said cam means for securing said bolt in the locking position when said cam means is in a first position and wherein said cam means has a second position permitting movement of said bolt between positions;
- detent means for releasably maintaining said rotatable cam means of a position securing said bolt in the extended position from the housing.
Dependencies are inferred from the claim text.