Flush-type door lock

A flush-mountable door lock, comprising:

• (a) a body structure having side and back walls which cooperate to define a forwardly facing recess, and having an opening formed through the back wall;
• (b) an elongate bolt slidably supported on the body structure at a location behind a portion of the back wall, the bolt being movable between an extended position wherein the bolt is extended with respect to the body structure, and a retracted position wherein the bolt is retracted with respect to the body structure, the bolt having a receiving formation communicating with the back wall opening;
• (c) detent means interposed between the body structure and the bolt for selectively releasably retaining the bolt in its retracted and extended positions, and for assisting in moving the bolt to and positioning the bolt in its retracted and extended positions once the bolt closely approaches these positions;
• (d) a handle mounted on the body structure and being movable between a nested position wherein the handle is nested within the recess and a projected position wherein a substantial portion of the handle projects from the recess;
• (e) connecting means extending through the opening and into the receiving formation for establishing a driving interconnection between the handle and the bolt which is operative to move the bolt out of its extended position and toward its retracted position as the handle is moved from its nested position to its projected position, and which is operative to move the bolt out of its retracted position and toward its extended position as the handle is moved from its projected position to its nested position;
• (f) biasing means interposed between the body member and the handle:
• (i) for biasing the handle toward its nested position;
• (ii) for maintaining play-free engagement between the handle and the body structure when the bolt is in its extended position;
• and,
• (iii) for maintaining a play-free driving connection between the handle and the bolt when the bolt is in its retracted position;
• (g) the connection means being operable to disengage the receiving formation when the bolt is extended and the handle is nested;
• (h) a through-hole formed in the bolt having one end opening toward the body structure;
• (i) a mounting sleeve formed from plastics material being carried in the through-hole;
• (j) a closed-ended hole being formed in the mounting sleeve and having an open end facing toward the body structure;
• and,
• (k) the detent means including a detent member positioned in the closed-ended hole together with spring means biasing the detent member toward the body structure for receiving the detent member when the bolt is in its retracted and extended positions.

A flush-mountable door lock, comprising:

• (a) a body member having side and back wall portions which define a forwardly facing recess, the back wall having a stepped configuration with a first part defining a relatively shallow recess portion and a second part defining a relatively deeper recess portion;
• (b) the body member including structure defining an elongate, open-ended passage on the back side of the second part, and an elongate slot being formed through the second part communicating with the passage;
• (c) a bolt slidably supported in the passage and being movable between an extended position wherein one end of the bolt is extended with respect to the passage, and a retracted position wherein the one bolt end is retracted with respect to the passage;
• (d) the bolt having a formation which is positioned near one end of the slot when the bolt is in its extended position, and which is positioned near the other end of the slot when the bolt is in its retracted position;
• (e) a paddle-shaped handle pivotally mounted on the body member and being movable between a nested position wherein the handle is nested within the deeper recess portion, and a projected position wherein a substantial portion of the handle projects forwardly of the recess;
• (f) bolt actuator means extending through the slot and being operably connected to the handle and to the bolt formation for moving the bolt from its extended position toward its retracted position when the handle is moved from its nested position to its projected position, and for moving the bolt from its retracted position toward its extended position when the handle is moved from its projected position to its nested position;
• (g) biasing means interposed between the body member and the handle for:
• (i) biasing the handle toward its nested position;
• (ii) maintaining play-free engagement between the handle and the body member when the handle is in its nested position;
• and,
• (iii) maintaining a play-free driving connection between the handle and the bolt when the handle is in its projected position;
• and,
• (h) detent means interposed between the body member and the bolt for:
• (i) assisting in moving the bolt to and positioning the bolt in its extended position as the bolt closely approaches its extended position;
• (ii) assisting in moving the bolt to and positioning the bolt in its retracted position as the bolt closely approaches its retracted position;
• (iii) releasably retaining the bolt in its extended position when the handle is in its nested position;
• (iv) releasably retaining the bolt in its retracted position when the handle is in its projected position;
• (v) releasably retaining the handle in its projected position once the handle has been moved to its projected position and in opposition to the action of the biasing means biasing the handle towards its nested position;
• and,
• (vi) the bolt actuator means being operable to disengage the bolt when the bolt is in its extended position and the handle is in its nested position.