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US 6,354,121 B1Granted
Mortise lockset with internal clutch
AssigneeHarrow Products, Inc.
InventorGeorge Frolov
Life of this patent
Estimating the term…
Abstract
A mortise lockset incorporates an electrically actuated clutch within the lock case. The clutch selectively engages one latch operator to permit access through a door equipped with the lockset. The lockset further includes a key rotatable cam for retracting the latch. The lockset includes a lock bar that permits retraction of the latch by means external to the lockset. An extended throw deadbolt-like latch is held in a retracted position by an auxiliary latch and hook until released by retraction of the auxiliary latch. The latch incorporates a recessed roller in the projected end of the latch to facilitate latch deployment.
Claims17
A lockset for mounting in a mortise of a door having a secured side and an unsecured side, said lockset comprising:
- a lock case;
- a latch movably mounted relative to said case and having a retracted position and a projected position, said latch being biased toward the projected position;
- latch retraction means for moving said latch from said projected position to said retracted position, said retraction means comprising a lever pivotable about a first axis;
- first coupling means for translating rotational motion applied at a secured side of a door to operate said retraction means;
- second coupling means for selectively translating rotational motion applied at an unsecured side of the door to operate said retraction means;
- clutch means for selectively engaging said second coupling means and said retraction means, said clutch means comprising:
- engagement means carried by said retraction means in fixed rotational relationship therewith for selectively engaging said second coupling means, said engagement means biased toward a non-engaged position;
- injector means for urging said engagement means into engagement with said second coupling means;
- and
- drive means for driving said injector means between a first position in which said injector means allows said engagement means to remain in said non-engaged position and a second position in which said injector means urges said engagement means into engagement with said second coupling means,
- wherein said latch, latch retraction means, first and second coupling means and clutch means are contained within said lock case and engagement of said engagement means with said second coupling means permits rotational motion applied at said unsecured side of said door to operate said retraction means.
8 more elements
A lockset comprising:
- a lock case;
- a latch movably mounted to said case, said latch having a projected position and a retracted position, said latch being biased toward the projected position;
- a latch retraction lever pivotable about a first axis from a first position to a second position, said lever being engaged with said latch such that movement of said lever from said first position to said second position causes a corresponding movement of said latch from said projected position to said retracted position;
- a first coupler rotatable about said first axis, said first coupler engaged with said lever such that rotation of said coupler causes a corresponding movement of said lever from said first position to said second position;
- a second coupler rotatable about said first axis;
- an engagement pin guide carried by said lever in fixed rotational relationship therewith;
- an engagement pin supported by said guide for rotation therewith about said first axis, said pin movable in a direction generally orthogonal to said first axis between an engaged position in which said pin rotationally couples said second coupler to said lever and a non-engaged position in which said coupler and said lever move independently, said pin being biased toward the non-engaged position;
- an injector arm pivotably movable about a second axis, said arm including a surface engagable with said pin, said arm movable between a locked position in which said surface permits said pin to remain in said non-engaged position and an unlocked position in which said surface urges said pin into said engaged position;
- an injector retained in said case and engageable with said arm, said injector movable between an inject position in which said injector urges said arm to said unlocked position and a non-inject position which permits said arm to remain in the non-inject position;
- and
- a drive assembly comprising a drive motor and a drive shaft rotatably driven by said motor and engageable with said injector such that rotation of said shaft in a first direction urges said injector from said non-inject position to said inject position and rotation of said shaft in a second direction urges said block from said inject position to said non-inject position,
- wherein said motor is remotely activatable and actuation of said motor causes rotation of said shaft in said first direction which urges said block to said inject position to urge said arm to said unlocked position, urging said pin into said engaged position which couples said lever to said second coupler, allowing rotation of said second coupler to move said lever to said second position to thereby move said latch to the retracted position.
9 more elements
Dependencies are inferred from the claim text.