Drive apparatus for a lock with lock cylinder
AssigneeKeso AG
InventorLeonhard Lerchner
Life of this patent
Estimating the term…
Abstract
For manual and motor operation of a locking cylinder a drive apparatus in the form of an escutcheon is provided on a door. The drive apparatus has a driveshaft for transmitting rotation to the locking cylinder, a turning handle for manual rotation of the driveshaft and a gear motor disposed in the turning handle for motor rotation of the driveshaft. A driving toothed wheel is disposed on the driveshaft so as to rotate in unison, being connected with the turning handle so as to transmit torque. The gear motor is adapted to be coupled with the escutcheon so as to rotate in unison and with the driving toothed wheel by a coupling when current is supplied.
Claims22
A drive apparatus for a lock, said drive apparatus comprising:
- an escutcheon;
- a drive shaft rotatably fitted to said escutcheon for transmitting rotational force to said lock or a locking cylinder within said lock;
- a turning handle rotatable relative to said escutcheon;
- and a gear motor disposed in said turning handle, said gear motor having an output shaft, wherein:
- a first toothed wheel is disposed on said drive shaft and is positioned to engage said turning handle so as transmit rotational movement of said turning handle to said drive shaft so that said drive shaft rotates;
- said gear motor is secured to said escutcheon so as to rotate in unison with said escutcheon;
- a coupler is provided for selectively coupling said gear motor output shaft to said first toothed wheel when a current is applied to said gear motor to actuate said gear motor.
A lock assembly, said lock assembly including:
- a rotatable locking cylinder;
- and
- a drive assembly, said drive assembly including:
- an escutcheon;
- a drive shaft rotatably fitted to said escutcheon, said drive shaft being connected to said locking cylinder so as to transfer rotational motion to said locking cylinder;
- a first gear attached to said drive shaft;
- a handle rotatably fitted relative to said escutcheon, said handle having a gear member positioned to engage said first gear so that rotation of said handle results in rotation of said drive shaft;
- a motor having an output shaft and disposed in said handle, wherein said motor is attached to a section of said escutcheon so as to rotate in unison with the section of said escutcheon;
- and
- a coupling assembly comprising:
- a second gear that is fitted to an axle so as to be displaceable along said axle and wherein said first gear, said second gear and said motor are arranged so that said second gear has a coupled position on said axle wherein said second gear engages both said motor output shaft and said first gear to transfer rotational motion from said motor output shaft to said drive shaft and an uncoupled position wherein said second gear is disconnected from one of said motor output shaft or said first gear;
- and a displacement assembly for moving said second gear between the coupled position and the uncoupled position.
Dependencies are inferred from the claim text.