초록 ▼

A latch has a displaceable latching element in a housing for engagement with a separate striker arm to be latched behind an engagement shoulder of the latching element. The housing mounts a cylinder lock to receive a key from the front. A rotor is mounted on the rear of the cylinder lock and rotatio

A latch has a displaceable latching element in a housing for engagement with a separate striker arm to be latched behind an engagement shoulder of the latching element. The housing mounts a cylinder lock to receive a key from the front. A rotor is mounted on the rear of the cylinder lock and rotation of the key causes rotation of the rotor to drive a locking element to engage and lock the latching element. The rotor may also be axial displaceable against spring biasing responsive to a rear unit pushing element whereby unlocking from a rear cylinder lock may rotate the rotor to unlock and pushing causes the latching element to be displaced against its biasing to release the striker arm.

대표청구항 ▼

1. A latch for holding closed a gate or door wherein the latch is adapted to co-operate with a striker arm, the latch comprising: (a) a housing in which(b) a displaceable latching element is mounted to be displaceable from a latching position towards an open position in which the striker arm is rele

1. A latch for holding closed a gate or door wherein the latch is adapted to co-operate with a striker arm, the latch comprising: (a) a housing in which(b) a displaceable latching element is mounted to be displaceable from a latching position towards an open position in which the striker arm is released for gate opening;(c) the latching element having a latching shoulder to retain the striker arm when engaged behind the latching shoulder and having an engagement surface adapted to be engaged by the striker arm when the gate is moved towards a closed position to displace the latching element and for permitting relative movement of the striker arm to adopt a position behind the latching shoulder;(d) a key-operated lock in the form of a cylinder lock mounted in the housing and having a key operation for unlocking the latch;(e) a locking element for locking the latching element and adapted to be displaced upon actuation of the housing lock between a locking position, in which movement of the latching element is restrained from moving, and a displaced position in which the latching element is free to be moved; and(f) the locking element being in the form of a rotor rotatably mounted in the housing, and movable about its axis between the locking position and the displaced position, the rotor also being capable of being displaced axially when in the displaced position, and wherein under said axial movement, the latching element is caused to move towards the open position, such that the latch is able to be locked and unlocked by rotation of the rotor and moved from the latching position by axial displacement of the rotor. 2. A latch as defined in claim 1, wherein the rotor is axially displaceable against a bias when displacing the latching element from the latching position towards the open position. 3. A latch as defined in claim 1, wherein the housing lock and the rotor are rotatable about a common axis. 4. A latch as defined in claim 3, wherein the rotor has rotary motion of about 20° between the locking position and the displaced position. 5. A latch as defined in claim 3, wherein a rear portion of the rotor remote from the housing lock is connectable to a remote actuating unit. 6. A latch as defined in claim 1, further comprising a projecting element which is positioned to displace the latching element from the latching position towards the open position when the rotor has been moved from the locking position towards the displaced position. 7. A latch as defined in claim 1, wherein the latching element is partially enshrouded in a casing with a protruding portion extending out of a face slot so as to facilitate manual lifting of the latching element when the housing lock has been unlocked. 8. A latch as defined in claim 1, wherein the latching element is configured as a gravity latch and the latching element is pivotal and is biased by gravity to the latching position. 9. A latch assembly comprising a latch according to claim 1, in combination with a remote actuating unit. 10. A latch assembly according to claim 9 wherein the remote actuating unit is able to impart rotation and/or axial displacement to the rotor to remotely operate the latch. 11. The latch assembly as defined in claim 10, further comprising a connector, wherein one end of the connector is received by a portion of the rotor, and the other end of the connector is mounted to the remote actuating unit to enable the remote actuating unit to remotely operate the latch via the rotor. 12. The latch assembly according to claim 11, wherein the connector is operable to engage with and displace the rotor against spring biasing to cause remote actuation of the latch element to open the latch. 13. The latch assembly according to claim 12, wherein the remote actuating unit comprises a lock that is adapted to rotate to transmit rotation to the rotor from the locking position to the displaced position. 14. The latch assembly as defined in claim 13, wherein the remote actuating unit is provided with a push button mounted to be depressed axially and to drive the connector to axially displace the rotor so as to cause the latching element to be displaced. 15. A latch assembly according to claim 9 the remote actuating unit having a lock being in the form of a cylinder lock; and the housing lock, the rotor and the remote actuating lock are all rotatable about a common axis. 16. A latch as defined in claim 6, wherein the rotor includes the projecting element. 17. A latch assembly for holding closed a gate or door comprising: a latch that co-operates with a striker arm, the latch comprising:(a) a housing in which(b) a displaceable latching element is mounted to be displaceable from a latching position towards an open position in which the striker arm is released for gate opening, and(c) the latching element having a latching shoulder to retain the striker arm when engaged behind the latching shoulder and having an engagement surface adapted to be engaged by the striker arm when the gate is moved towards a closed position to displace the latching element and for permitting relative movement of the striker arm to adopt a position behind the latching shoulder;(d) a key-operated lock in the form of a cylinder lock mounted in the housing and having a key operation for unlocking the latch;(e) a locking element for locking the latching element and adapted to be displaced upon actuation of the housing lock between a locking position, in which movement of the latching element is restrained from moving, and a displaced position in which the latching element is free to be moved;(f) the locking element being in the form of a rotor rotatably mounted in the housing, and moveable about its axis between the locking position and the displaced position;(g) the housing lock and the rotor are rotatable about a common axis;(h) a remote actuating unit; and(i) a connector mounted to the rotor and the remote actuating unit to enable the remote actuating unit to remotely rotate the rotor;(j) wherein the connector is able to be axially displaced and the remote actuating unit is provided with an actuator to drive the connector to axially displace the connector, wherein axial displacement of the connector causes the latching element to be displaced from the latching position towards the open position such that the latch is able to be locked and unlocked by rotation of the rotor and moved from the latching position by axial displacement of the connector. 18. A latch assembly as defined in claim 17, wherein, when the rotor is in the displaced position, axial displacement of the connector under operation of the actuator causes a corresponding axial displacement of the rotor. 19. A latch assembly as defined in claim 18, further comprising a projecting element which is positioned to displace the latching element from the latching position towards the open position when the rotor is displaced axially. 20. A latch assembly as defined in claim 19, wherein the projecting element is mounted on the rotor. 21. A latch assembly as defined in claim 20, wherein the remote actuating unit has a lock in the form of a cylinder lock that is operative to rotate the rotor. 22. A latch assembly as defined in claim 21, wherein the housing lock, the rotor and the remote actuating lock are all rotatable about a common axis. 23. A latch assembly as defined in claim 17, wherein the rotor when in the locking position prevents the connector from being axially displaced by operation of the actuator.