Storm door mortise lock that prevents lockout
AssigneeBetteli, Inc. Hong Kong
InventorWu Feng Qing
Life of this patent
Estimating the term…
Abstract
A method and apparatus for providing a storm door mortise lock that prevents lockout with a lock body having opposed side plates and a cam in between the side plates, the cam being in operative interaction with a dead bolt assembly. The mortise lock body also may include one or more stops within the deadbolt assembly to limit the rotation of the cam and prevent a lockout situation. A thumb turn button and key cylinder are secured to opposite escutcheon plates. A spindle traverses from the key cylinder through the cam through hole and terminates in the mounting slot of the thumb turn button. Rotation of either the thumb turn button or the key cylinder turns the spindle and actuates the cam that actuates the dead bolt assembly.
Claims19
A storm door mortise lock that prevents lockout, comprising:
- a pair of side plates;
- a dead bolt installed between the side plates;
- a cam having a cam body and a cam arm rotatably secured between the side plates and extending into a notch in the dead bolt wherein the cam body has first and second flat surfaces which converge to define an over-center point;
- the cam pivoting about an axis spaced from the dead bolt;
- a spring installed between the side plates and outside the dead bolt, that engages the first and second flat surface of the cam, so as to bias the dead bolt towards the locked and unlocked positions, respectively;
- and
- wherein the dead bolt having a stop to limit the rotation of the cam.
A storm door including a mortise lock, the storm door comprising:
- a door body having opposite faces and an edge, wherein the edge has a mortise formed therein;
- a key cylinder operatively connected to a mortise lock;
- the mortise lock inserted into the mortise, the mortise lock having:
- spaced apart side plates;
- a cam having an orifice engaging a first spindle operatively connected to the key cylinder, the cam being rotatably secured between the side plates and including a cam body and a cam finger wherein the cam body has converging first and second flat surfaces defining an over-center point;
- a dead bolt mounted intermediate the side plates and being moveable by the cam between a locked position and an unlocked position, to receive the cam;
- a live bolt slidably mounted intermediate the side plates and actuated between an extended and retracted position;
- the cam having a pivot axis spaced from the dead bolt;
- a spring outside the dead bolt that engages the first and second flat surface of the cam and biases the dead bolt towards the locked and unlocked positions, respectively;
- a handle on each face of the door to actuate the live bolt;
- the dead bolt having a notch therein and the cam finger extending into the dead bolt notch;
- and
- the notch having a lip to prevent the finger from pivoting out of the notch into a lockout situation.
Dependencies are inferred from the claim text.