Abstract: A coupling for releasably attaching a tool to the boom of a material handler includes a receiver having attachment member on one end, a generally circular cavity in the other end, and a plurality of circumferentially spaced arcuate ribs intermediate the axial length thereof defining an axially extending circular passage centrally thereof and axially extending channels between the spaced ends thereof. Stops on one end of the ribs extending upwardly and stops on the other end extend downwardly. A connector has one end portion seated in the receiver passage with radially extending lugs extending under the ribs. A locking member is movably seated in a passage in the receiver to preclude rotation of the connector.

Abstract: A replaceable blade assembly is used to secure tool blades to the jaws of a material handler and comprises a holder secured to the jaw and a blade insert which is releasably secured thereto. The holder has a face with an elongated intermediate portion, an inclined end portion adjacent its outer end, a channel extending along the elongated intermediate portion, and a recess in the inclined end portion. The blade insert has a first face for mounting against the face of the holder with an elongated intermediate portion bearing against the elongated intermediate portion of the holder. A inclined end portion adjacent the outer end of the blade insert bears against the inclined end portion of the holder, and a spine on the elongated portion seats in the channel of the holder. A projection on the outer end of the blade insert seats in the holder recess, and a fastener releasably secures the inner end of the insert to the inner end of the holder.