Patent ID: 8448357

Claim:
A coupler for coupling an excavator bucket to an excavator arm of an excavator, the excavator bucket comprising two attachment pins for use in the coupling, the coupler comprising: a first side for attaching the coupler to an excavator arm of an excavator; and a second side onto which, in use, the excavator bucket would be coupled; wherein: the second side comprises a first jaw for receiving a first of the attachment pins of the excavator bucket for connecting the excavator bucket to the coupler by the engagement of the first jaw with that first attachment pin; the first jaw further comprises a toggle having a first state—a jaw-open or jaw-unlocked state, and a second state—a jaw-closed or jaw-locked state, the toggle at least partially closing the first jaw of the coupler when it is in its second state; the coupler has a second jaw, the second jaw being for a second of the attachment pins of the excavator bucket; the second jaw has a hydraulically or mechanically driven latching hook or latching plate, which, together with the first jaw, provides a primary coupling mechanism for coupling the excavator bucket to the coupler in a fixed orientation relative to the coupler; the toggle is a pivotal member having rotation limits defined by one or more pivot stops; a first pivot stop is an inside surface of a front wall member of a hole provided in a upper wall of the first jaw, the toggle being mounted for rotation within that hole about a pivot axis that runs in a transverse direction of the coupler, the pivoting of the toggle moving the toggle between its first and second states; and the toggle having two walls that extend from a curved portion, at least one of the two walls being arranged to bear against that inside surface when the toggle is in the second state.