Lock

1 . A lock for installation in a door leaf defining a first plane, the lock comprising:

a housing;

a bolt moveable relative to the housing between a retracted position, and an extended position in which a distal portion of the bolt protrudes from an opening in the housing, wherein the bolt is resiliently biased into the extended position; and

a lock mechanism configured to selectively engage the bolt in order to selectively retain the bolt in the retracted position;

wherein the distal portion of the bolt comprises a sloped upper shoulder and a sloped lower shoulder, such that the bolt is moveable into the retracted position in response to a force applied in a vertical direction with respect to the first plane to at least one shoulder;

wherein the lock mechanism comprises a follower and a cam, wherein the follower is configured to rotate the cam, and wherein the cam is configured to selectively engage a corresponding surface of the bolt;

wherein the follower is rotatable between:

a first rotational position in which the cam is disengaged from the bolt such that the bolt is resiliently biased into the extended position; and

a second rotational position in which the cam engages the corresponding surface of the bolt to retain the bolt in the retracted position;

wherein movement of the follower from the first rotational position to the second rotational position causes the cam to move the bolt into the retracted position.

2 . The lock of claim 1 wherein, when the bolt is in the extended position, the slope of each of the upper shoulder and the lower shoulder extends at least to the opening.

3 . The lock of claim 1 , wherein the distal portion of the bolt is rounded to form the upper shoulder and the lower shoulder.

4 . The lock of claim 1 , further comprising a shroud arranged within the housing to conceal an interior of the housing when the bolt is in the retracted position.

5 . The lock of claim 4 , wherein the shroud extends proximally from the opening.

6 . The lock of claim 5 , wherein the shroud at least partially encases the bolt.

7 . The lock of claim 1 , wherein the lock mechanism further comprises:

a first spindle extending from a first side of the lock;

wherein the first spindle is translatable relative to the follower between a first position in which the first spindle is rotationally coupled with the follower; and a second position in which the first spindle is rotationally decoupled from the follower.

8 . The lock of claim 7 , wherein the lock mechanism further comprises:

a second spindle extending from a second side of the lock; wherein the second spindle is rotationally coupled with the follower.

9 . The lock of claim 8 , wherein the second spindle is configured to be rotatable relative to the first spindle.

10 . The lock of claim 8 , wherein the second spindle is translationally coupled with the first spindle, such that translation of the second spindle relative to the follower causes the first spindle to translate relative to the follower.

11 . The lock of claim 10 , wherein the second spindle is rotationally coupled with the follower when the first spindle is in each of the first position and the second position.

12 . The lock of claim 8 , wherein the first spindle and the second spindle collectively form a split spindle.

13 . The lock of claim 8 , wherein translational travel of the second spindle is limited so as to prevent rotational disengagement of the second spindle from the follower.

14 . The lock of claim 8 , wherein the first spindle is coupled with a first handle, and the second spindle is coupled with a second handle.

15 . The lock of claim 14 , wherein a rotational range of motion of the first handle is less than that of the follower.

16 . The lock of claim 7 , wherein the first spindle is resiliently biased into one of the first position and the second position.

17 . A lock for installation in a door leaf defining a first plane, the lock comprising:

a housing; and

a bolt moveable relative to the housing between a retracted position, and an extended position in which a distal portion of the bolt protrudes from an opening in the housing;

wherein the distal portion of the bolt comprises a sloped upper shoulder and a sloped lower shoulder, such that the bolt is moveable into the retracted position in response to a force applied in a vertical direction with respect to the first plane to at least one shoulder.