Device for childproofing a door lock
OwnerTimothy D. Craiginventor
Life of this patent
Estimating the term…
Abstract
The device for childproofing a door lock is a device that fits on a standard lockset and prevents a lever or doorknob from turning when the device is engaged. The childproof door lock includes a substantially rectangular base plate and a circular disk that mounts atop the base. A sliding plate mounted on the base has a cylindrical locking post that engages a notch on the circular disk and prevents it from turning. The sliding plate may be spring-biased to hold the locking post in the notch. A lever may be attached to the sliding plate to disengage the locking post from the notch and allow the circular disk to turn freely.
Claims20
A device for childproofing a door lock, comprising:
- a substantially rectangular base member having an upper surface, a central aperture formed therethrough and a pair of notched sides adapted for mounting on the shafts of a door lock assembly;
- a first cylindrical post extending from the upper surface of the base member;
- a sliding plate member slidably mounted on the base member, the sliding plate member having an upper surface and a lower surface;
- a second cylindrical post extending from the upper surface of the sliding plate member;
- a circular disk member rotatably mounted on the upper surface of the base member, the disk member having a central aperture formed therethrough, an arcuate guide channel and an arcuate locking channel opposite the guide channel, the first cylindrical post extending through and being slidable in the arcuate guide channel, the second cylindrical post extending through and being slidable in the locking channel, the locking channel having a central notch for releasably receiving the second cylindrical post to limit slidable movement in the locking channel and prevent complete rotation of the door lock;
- and
- means for selectively disengaging the second cylindrical post from the central notch to allow unlimited slidable movement in the locking channel to permit complete rotation of the door lock to open the door.
A device for childproofing a door lock, comprising:
- a substantially rectangular base member having a central aperture formed therethrough, an upper surface, and a pair of notched sides adapted for mounting on shafts of a door lock assembly;
- a first cylindrical post extending from the upper surface of the base member;
- a sliding plate member slidably mounted on the base member, the sliding plate member having an upper surface;
- a second cylindrical post extending from the upper surface of the sliding plate member;
- a circular disk member rotatably mounted on the upper surface of the substantially rectangular base member, the disk member having a central aperture, an arcuate guide channel, and an arcuate locking channel formed therethrough, the first cylindrical post being slidable in the arcuate guide channel, the second cylindrical post being slidable in the locking channel, the locking channel having a central notch for releasably receiving the second cylindrical post to limit slidable movement in the locking channel and prevent complete rotation of the door lock;
- and
- a first release lever having opposed fixed and free ends, the fixed end thereof pivotally attached to the second cylindrical post, whereby the user may grip the free end thereof and slide the first release lever to selectively disengage the second cylindrical post from the central notch.
Dependencies are inferred from the claim text.