Abstract: A coupler is provided for implementation on the boom of an excavator and adapted for receiving and coupling an arm or implement. The coupler is pinned to the boom through apertures and a pair of parallel plates. An actuating hydraulic piston is connected to the coupler through holes passing through another pair of plates. Attachment to the arm or implement is achieved by first engagement of a pair of slots with pins on the arm, and subsequent engagement of other slots with another pair of pins. The last mentioned slots have associated therewith a cam locking plate which closes the slot upon the pins to prevent removal.

Abstract: A side-shift backhoe includes a slide frame having an upper end forming a downwardly opening receptacle having a cylindrically curved inner surface engaged with a complementary shaped surface of an upper transverse guide rail of a support frame. The slide frame also includes a transverse member which is releasably secured to a lower end of the frame and includes an upwardly- and rearwardly-facing abutment surface disposed for engagement with a downwardly and forwardly-facing abutment surface of a lower transverse guide rail of the support frame. A pair of linear hydraulic swing actuators are located between upper and lower transversely-extending mounting bars, and the cylinders of the actuators are each swivelly mounted to the bars with the bars and actuators forming a swing actuator unit. The swing actuator unit is releasably secured to the slide frame such that the actuators project through a central, fore-and-aft extending opening provided in the slide frame.

Abstract: A backhoe swing frame has a latch member fulcrumed to the top thereof. When the backhoe boom is in a raised transport position and the swing frame is in a centered position, the latch member may be pivoted to a lock position wherein a pin at one end thereof is received in a downwardly opening hook fixed to the backhoe boom and a block at the other end thereof is received in an upwardly opening channel at the top of the support frame for the swing frame.