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US 4,286,812 AGranted
Security screen door lock
AssigneeWhitco Pty. Ltd.
InventorOtto G. G. Sprekeler
Life of this patent
Estimating the term…
Abstract
A mortise-type deadlock for hingedly-mounted doors and windows where a locking block engages the lock tongue in the extended position. A pivotally-mounted stop lever on the locking block engages an abutment in the lock body to prevent the locking block being shaken free of the lock tongue. The lock tongue may be reversible and may be removed from the lock body by operating a stop member operable from the exterior of the lock body.
Claims8
A lock including:
- a body;
- a lock tongue normally extending from the body, said tongue being provided with means projecting from each side thereof to adapt said tongue to reversibility for use with both left and right hand opening doors;
- means for retaining said tongue in its selected, reversible position;
- a locking block slidably movable in the body between a first position free of the lock tongue and a second position preventing retraction of the lock tongue;
- an abutment in the body;
- and
- a stop lever movably mounted on the locking block and adapted to engage the abutment when the locking body is in the second position to restrain the locking body in the second position.
4 more elements
Dependencies are inferred from the claim text.