Back to results
US 5,640,863 AGranted
Clutch mechanism for door lock system
AssigneeHarrow Products, Inc.
InventorGeorge Frolov
Life of this patent
Estimating the term…
Abstract
A door lock system includes a clutch mechanism for a lockset and has particular applicability in conjunction with lever handles. Two coupling assemblies are selectively rotatably coupled by a coupling pin. One coupling assembly is rotatably coupled to the lockset actuator. The other coupling assembly is rotatably coupled to the exterior door handle. A drive assembly includes a motor which selectively controls the position of the coupling pin to provide for the locking and unlocking functions.
Claims26
A clutch mechanism for a door having a lockset with a lockable latch and an actuator for operating said latch, said clutch mechanism comprising:
- first coupling means for translating rotational motion to operate said actuator;
- second coupling means comprising a rotatable assembly for selectively translating rotatable motion applied at one side of said door;
- and
- clutch means for selectively engaging said first and second coupling means, said clutch means comprising:
- pin means carried by said first coupling means in fixed rotatable relationship therewith for selectively engaging said second coupling means;
- injector means disposable in generally fixed rotational relationship with said door for forcing said pin means into engagement with said second coupling means;
- and
- drive means for driving said injector means between first and second positions to selectively rotatably engage said first coupling means and said second coupling means for selectively locking and unlocking said latch from said one side, said drive means having a powered state and an unpowered state, said drive means maintaining said latch in an unlocked condition in said unpowered state, said drive means comprising a motor and a drive link comprising a spring shaft drivable by said motor for axially displacing said injector means.
5 more elements
A lock system for a door comprising:
- lockset means comprising a projectable and retractable lockable latch and an actuator for operating said latch;
- entry control means for receiving an input and generating an output in response to a valid input;
- first coupling means for translating rotational motion to said actuator;
- second coupling means comprising a rotatable assembly for selectively translating rotatable motion;
- clutch means for selectively engaging said first and second coupling means, said clutch means comprising:
- pin means carried by said first coupling means in fixed rotatable relationship therewith for selectively engaging said second coupling means;
- drive means responsive to said output for driving said pin means between first and second positions to selectively rotatably engage said first coupling means and said second coupling means for selectively locking and unlocking said latch, said drive means comprising a motor and a drive link comprising a spring shaft drivable by said motor.
4 more elements
A lock system for a door comprising:
- lockset means comprising a projectable and retractable lockable latch and an actuator for operating said latch;
- first coupling means rotatable about a first axis for translating rotational motion to said actuator;
- second coupling means comprising a handle and an assembly rotatable about said first axis;
- and
- clutch means for selectively engaging said first and second coupling means, said clutch means comprising:
- pin means carried by one said coupling means in fixed rotatable relationship therewith;
- slot means for defining a slot in said other coupling means for receiving said pin means;
- drive means for selectively driving said pin means into said slot means for selectively locking and unlocking said latch, said drive means comprising a drive link and a motor, said drive link comprising a pivoting drive lever having first and second positions, a drive shaft comprising a spring shaft mounted to said motor for rotation thereby, said drive shaft threadably engaging said drive lever wherein rotation of said shaft moves said lever between said first and second positions to drive said pin to unlock said latch.
5 more elements
Dependencies are inferred from the claim text.