Abstract: A quick coupler lock, for use as a safety to engage an attachment, such as a bucket or scoop, to a heavy equipment armature, as found in backhoes and excavators. The coupler lock prevents the unwanted release of auxiliary attachments. The coupler lock includes a coupler frame with a pin grabber, and a coupler hook rotated to engage a pin. The rotation of the coupler hook is accomplished by the extension or retraction of a coupler actuator, preferably a hydraulic cylinder held within a spring. The coupler actuator hingably connects to a pivoting lock lever. The action of the coupler actuator rotates the lock lever about the lever pin. A lock bar hingably attaches to the coupler hook and rotates with the coupler hook. The lock lever includes an arm that contacts the lock bar, to prevent movement of the coupler hook and prevent the unwanted release of the pin.

Abstract: An actuated mechanical thumb apparatus is provided that pivots in compliment to the hinging of a bucket or similar hydraulically actuated attachment, as employed with conventional heavy equipment, such as backhoes and excavators. The thumb co-operatively actuates with the bucket to prevent walking or shifting of the gripped object. The thumb apparatus is unitized, or of a single component, well suited for easy retrofit to conventional material handling and earth moving equipment. The frame of the thumb apparatus mounts to a heavy equipment boom member or arm. The frame can be held in place on the boom member by two pins. The frame includes two frame plates, and the thumb includes two thumb plates. Each frame plate hingably attaches to one of the thumb plates at a separate pivot. This allows the thumb to pivot straddle the bucket's hinge, and pivot on the same axis as the bucket. A thumb link can be used across a pivoting bell crank, actuated by the thumb's hydraulic cylinder to actuate the thumb.