초록 ▼

A door latch for retaining a door to a door frame or floor at a plurality of locations adjacent a respective edge of the door includes a central latch disposed within the door and biased in an extended position, and at least one of an upper latch disposed within the door and biased in an extended po

A door latch for retaining a door to a door frame or floor at a plurality of locations adjacent a respective edge of the door includes a central latch disposed within the door and biased in an extended position, and at least one of an upper latch disposed within the door and biased in an extended position and a lower latch disposed within the door and biased in an extended position. The door latch further includes a lock set that is operable for simultaneously moving the central latch and the at least one of the upper latch and the lower latch from the extended position to a retracted position so as to release the door from the door frame. The door latch includes a rotatable central shaft operably coupled with a cam, and a connecting arm operably coupled with the cam and attached to an actuator rod. The actuator rod is connected to an inner sleeve moveably disposed within an outer housing of the upper latch or the lower latch. Movement of the actuator rod creates a tension force that is greater than the biasing force exerted on the inner sleeve to move the inner sleeve from the extended position to the retracted position.

대표청구항 ▼

1. A door latch for retaining a door with a stationary door frame, another door or a floor at a plurality of locations adjacent a respective edge of the door, the door latch comprising: a central latch that is disposed within the door and biased in an extended position relative to a first edge of th

1. A door latch for retaining a door with a stationary door frame, another door or a floor at a plurality of locations adjacent a respective edge of the door, the door latch comprising: a central latch that is disposed within the door and biased in an extended position relative to a first edge of the door;an upper latch that is disposed within the door and biased in an extended position relative to a second edge of the door and a lower latch that is disposed within the door and biased in an extended position relative to a third edge of the door; anda lock set comprising a rotatable central shaft operably coupled to cam that is in operable communication with an actuator arm via a connecting arm, the connecting arm defined by a pair of parallel fingers, each finger in parallel orientation relative to a longitudinal axis defined by the actuator rod, a center of the cam positioned between the fingers, and the cam defining two laterally distal portions, one finger contacting a first distal cam portion and the other finger contacting a second distal cam portion; wherein rotatable operation of the central shaft in either rotational direction causes simultaneous movement of the central latch, the upper latch and the lower latch from the extended position to a retracted position, and wherein rotation of the cam in either rotational direction causes movement of the actuator rod of the at least one of the upper latch and the lower latch in an inward direction relative to the door, and wherein the actuator rod is operably coupled with an inner sleeve of the at least one of the upper latch and the lower latch, and wherein the inner sleeve is biased in the extended position by a biasing force, and wherein the movement of the actuator rod relative to the door creates a tension force that is greater than the biasing force such that the inner sleeve of the at least one of the upper latch and the lower latch moves from the extended position to the retracted position.