Patent ID: 7814689

Claim:
An implement comprising: a first hook plate defining a first hook with a center axis; a first wedge plate having a flat first wedge coupling surface formed thereon; a first wedge pocket located in approximately the same vertical plane as the first hook plate, the first wedge pocket defined by a rectangularly-shaped opening formed through the first wedge plate and through the first wedge coupling surface, the first wedge coupling surface at least partially surrounds the first wedge pocket; a second hook plate defining a second hook with a center axis, the center axis of the first hook and the center axis of the second hook are coaxial; a second wedge plate having a flat second wedge coupling surface formed thereon, the first wedge coupling surface and the second wedge coupling surface are coplanar; a second wedge pocket located in approximately the same vertical plane as the second hook plate, the second wedge pocket defined by a rectangularly-shaped opening formed through the second wedge plate and through the second wedge coupling surface, the second wedge coupling surface at least partially surrounds the second wedge pocket; wherein the first wedge coupling surface forms an angle α measured between a line passing through the center axis of the first hook and through the first wedge coupling surface, and a line parallel to the first wedge coupling surface; wherein the second wedge coupling surface forms an angle α measured between a line passing through the center of the second hook and through the second wedge coupling surface, and a line parallel to the second wedge coupling surface; and the angle α is between 60 and 44 degrees.