Pin coupler with safety lock

A pin grabber coupler for coupling an attachment with an excavator, the pin grabber coupler comprising:

• a pair of spaced-apart plates;
• a housing at least between the spaced-apart plates;
• a rear receiving arch and a forward receiving arch formed by the spaced-apart plates for receiving a pin of the attachment;
• a wedge lock extending between the spaced-apart plates;
• a main actuator for driving the wedge lock into the rear receiving arch and for retracting the wedge lock from the rear receiving arch;
• a locking system for locking and for unlocking the wedge lock, the locking system comprising:
• a latch having a latch end, a lever end, and a pivot therebetween;
• the latch end engaging the wedge lock once the wedge lock is fully extended into the rear receiving arch;
• a biasing member coupled to the lever end and biasing the latch end towards the wedge lock;
• and
• an unlock actuator for opposing the biasing member to disengage the latch end from the wedge lock,
• wherein the unlock actuator comprises a hydraulic cylinder for acting on the lever end of the latch.