Tubular latch mechanism
AssigneeSchlage Lock Company LLC
InventorsHariom Choudhary, Anjan Srinivas, Allen Mani, David J. Hurlbert
Life of this patent
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Abstract
Certain embodiments of the present disclosure relate to a latch mechanism, including a housing assembly, a bolt bar, a bolt, and a multiplier. The bolt bar is slidably mounted in the housing assembly, the bolt is slidably mounted in the housing assembly, and the multiplier is pivotably mounted to the bolt bar. The multiplier is configured to move the bolt by a first displacement distance in response to movement of the bolt bar by a second displacement distance, and the first displacement distance is greater than the second displacement distance.
Claims21
A latch mechanism, comprising:
- a housing assembly;
- a bolt slidably mounted in the housing assembly;
- a first cam rotatably mounted in the housing assembly, wherein the first cam is slidable relative to the housing assembly between a first backset position and a second backset position;
- and
- a retraction assembly configured to retract the bolt in response to rotation of the first cam, wherein the retraction assembly comprises:
- a primary bolt bar engaged with the bolt such that retraction of the primary bolt bar causes a corresponding retraction of the bolt;
- and
- a secondary bolt bar engaged with the primary bolt bar such that retraction of the secondary bolt bar causes a corresponding retraction of the primary bolt bar;
- wherein the first cam is operable to engage and retract one of the primary bolt bar or the secondary bolt bar when the first cam is in the first backset position;
- wherein the first cam is operable to engage and retract the other of the primary bolt bar or the secondary bolt bar when the first cam is in the second backset position;
- and
- wherein the secondary bolt bar is operable to remain stationary during movement of the primary bolt bar when the first cam is in the second backset position.
A latch mechanism, comprising:
- a housing assembly;
- a bolt bar slidably mounted in the housing assembly;
- a cam rotatably mounted for rotation about a rotational axis;
- a bolt slidably mounted in the housing assembly;
- and
- a multiplier pivotably mounted to the bolt bar for pivotal movement about a pivot axis that moves with the bolt bar, wherein the pivot axis extends in a direction of the rotational axis;
- wherein the multiplier is configured to move the bolt by a first displacement distance in response to movement of the bolt bar by a second displacement distance;
- and
- wherein the first displacement distance is greater than the second displacement distance.
A latch mechanism, comprising:
- a housing assembly;
- a bolt slidably mounted in the housing assembly;
- a first cam rotatably mounted in the housing assembly, wherein the first cam is slidable relative to the housing assembly between a first backset position and a second backset position;
- a retraction assembly configured to retract the bolt in response to rotation of the first cam when the first cam is in the first backset position and when the first cam is in the second backset position;
- and
- a cam holder mounted to the housing assembly, the cam holder comprising:
- a first seat configured to selectively retain the first cam in the first backset position;
- a second seat configured to selectively retain the first cam in the second backset position;
- and
- a pair of arms at least partially defining the first seat and the second seat, wherein the pair of arms further defines a constriction between the first seat and the second seat;
- wherein the arms are operable to flex away from one another to thereby permit travel of the first cam between the first seat and the second seat;
- and
- wherein the cam comprises a narrowed section configured to selectively facilitate sliding movement of the cam through the constriction based on a rotational position of the cam.
Dependencies are inferred from the claim text.