Latches for gates and doors

摘要

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 cylinder lock and rotation of the key rotation 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. Embodiments include a gravity biased and manually opened latch and a spring biased self-locking embodiment.

主权项

1. A latch assembly for holding closed a gate or door wherein the latch assembly is adapted to co-operate with a striker arm, the latch assembly comprising:
a latch mountable to the gate or a gate post; and a remote actuating unit mountable on an opposite side of the gate or gate post to the latch; 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 or door 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 or door 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 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 key-operated 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, the rotor being movable about its axis for directly engaging with and disengaging from the latching element and (g) a connector connecting the rotor to the remote actuating unit for remotely operating the latch via the rotor, 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.