Abstract: A quick coupler includes mounting structure for mounting the coupler to a machine, and for mounting the coupler to an implement. The mounting structure on the coupler includes wedge coupling surfaces and a tube. The mounting structure on the implement includes hooks for engaging the tube, and complementary wedge coupling surfaces. The wedge coupling surfaces wedge together during coupling to produce and tight fit and solid hold between the coupler and implement. The mounting structure is robust, and can accommodate future possible wear. The kinematic impact on the performance of the implement due to the use of the quick coupler is minimized.

Abstract: The addition of a thumb to a bucket of a work machine allows more uses for the work machine than having only the bucket. Having an attachment device locatable along the length of the stick permits different thumbs and different implement-positioning devices to be used with different work machines, adding more flexibility of use. The disclosed method and apparatus is for an attachment device for attaching an implement-positioning device to a load-bearing member, comprising a base member, a coupling member for adjustably attaching the base member to the load bearing member, and an attachment means for attaching the implement-positioning device to the coupling member.