A pin grabber coupler for coupling an attachment with an excavator having a housing at least between the 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; and a main actuator driving the wedge lock into the rear receiving arch and retracting the wedge lock from the rear receiving arch. A locking system for locking or unlocking the wedge lock has 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 opposing the biasing member to disengage the latch end from the wedge lock.

A quick coupler and methods of coupling and decoupling a quick coupler and work tool are disclosed. The quick coupler includes a frame, cylinder, primary blocking member, secondary blocking member, biasing member, and controller. The method of coupling includes activating an AUTOMATIC LOCKING state, automatically locking a second tool pin within a hook, a first tool pin entering a notch, and activating a LOCKED state. The method of decoupling includes activating the AUTOMATIC LOCKING state, resting the work tool on a surface, activating an UNLOCKED state, and separating the quick coupler and work tool. Advantageously, the quick coupler can automatically lock the second tool pin without actuation of the cylinder.

A bracket for mounting an excavation bucket on a coupler of an articulated arm. The bracket comprises a body extending in a plane and having a central portion. A first concavity on a first side of the body substantially has an arc-of-circle shape to conform with a surface of a cylinder and hinge therearound. The bracket comprises a second concavity on a second side of the body opposite the first side with respect to the central portion. A third concavity on the second side of the body substantially has the arc-of-circle shape. The bracket comprises a first abutment edge formed by the central portion of the body; and a second abutment edge aside the first abutment edge and further from the central portion of the body compared to the first abutment edge. This bracket allows reversible mounting of the coupler of the excavation bucket.

The present invention provides a coupling apparatus for coupling an attachment to a dipper arm of a machine. The apparatus includes a coupler body; a first, fixed engaging means mounted on the coupler body for engaging a first coupling pin of the attachment, in use; a latch member associated with and pivotable with respect to the first, fixed engaging means between latched and unlatched positions; and a locking member pivotable about a pivot point between first and second positions, and provided in mechanical communication with the latch member. The latch member includes an aperture located therethrough, and the locking member includes a trunnion member or other such protrusion located thereon, extending into or through the aperture of the latch member and engaging the same such that when the locking member is in the first position, the latch member is in the latched position, and when the locking member is moved to the second position, the trunnion member moves the latch to the unlatched position.

A coupler for securing an attachment to an earth working machine. The coupler comprises a coupler body that presents a receptacle having a capture region. A pin of an attachment can move into and out of the capture region. A retainer can capture the pin in the capture region but the retainer can be moved by a hydraulically driven driver to a position to allow release the pin from the capture region. A trigger that the pin will strike when the pin moves into or out of the capture region, decouples the driver from the retainer and the retainer is then allowed to be biased back to its retaining position by a spring.

A quick-change coupler device for coupling and uncoupling implement attachments to and from construction site equipment includes a carrier assembly, first receiving members disposed on one side of the carrier assembly for receiving a first coupling member, second receiving members disposed on the other side of the carrier assembly for receiving a second coupling member, a locking unit dedicated to the second receiving members and capable of moving between a release position and a locking position, and a catch unit disposed on the carrier assembly for catching the implement attachment. To simplify coupling and to ensure an increased safety level, the catch unit comprises at least one catch hook swivel-mounted on the carrier assembly and a control unit controls swivel of the catch hook between a folded-in and a folded-out position. The control unit is actuated by the first coupling member and is actuated independently of the locking unit.

An excavator bucket locking and security device that is engageable with a backfill blade of an excavator. The locking and security device has a connection device for connection to the excavator bucket. The connection device includes an upper pipe for engaging the bucket's upper receptacles. The connection device also has a lower pipe that is positionable next to the bucket's lower receptacles. An insertable pole is insertable through the lower pipe and through the lower bucket receptacles. The locking and security device also includes a pipe connection device for connecting the upper pipe to the lower pipe. A hook is connected to the pipe connection device. The hook is engageable with a backfill blade of an excavator.

Components of a jig are suppressed from coming into contact with a pin hole when a coupling pin is removed from the pin hole, and a length of the jig in a coupling pin axial direction is held down. A coupling pin attaching/detaching apparatus (a coupling pin extracting apparatus) includes a cylinder and a connection member. The cylinder is arranged outside a coupling pin in a radial direction of the coupling pin and is extensible. The connection member is connected to the coupling pin and the cylinder. Extension of the cylinder causes the coupling pin to be extracted from a pin hole via the connection member.

Quick coupler with front pin safety lock system including body, front pin lock configured to rotate pivotally to lock in a pin, slide ratchet configured to move forward-backward to force the front pin lock to rotate, actuator including a cylinder and a piston rod which moves in the cylinder, rear lock connected to the piston rod, links configured to connect the rear lock and the slide ratchet and casing configured to house a part of the links and a part of the slide ratchet, is provided. It can work even when power is cut off and emergency front pin release can be performed.

A coupler for coupling an attachment to an excavator. The coupler has first and second spaced-apart coupling formations for coupling with respective corresponding coupling formation of the attachment. The coupler also has a power actuated locking member for retaining the respective attachment coupling formation in engagement with the first coupling formation. A detection system is capable of detecting if the respective attachment coupling formation is in a desired position with respect to the first coupling formation, wherein the detecting means comprises at least one non-contact sensor, preferably an ultrasonic sensor.