| 主权项 |
1. A shearing implement for use with an excavator having a bucket pivotably attached to a bucket end of a boom, the shearing implement comprising:
a thumb having
a base with grasping and blade receiving surfaces on opposite sides of the base and proximal and distal base ends anda pair of elongate thumb wall members, each thumb wall member being attached to the base and extending proximally from the proximal base end, the thumb wall members having proximal wall end portions attachable to the boom so as to be pivotable relative to the boom at a thumb pivot at or adjacent the bucket end; a shearing blade member having
a proximal attachment portion with a proximal blade member end anda distal blade portion with a distal blade member end, the shearing blade member being pivotably attached to the thumb at a blade pivot axis that is spaced apart from both the proximal and distal blade member ends and both the proximal wall end and the distal base end, the blade portion having a cutting edge distal to the blade pivot axis, the shearing blade member being configured to pivot between a closed position in which the cutting edge engages the blade receiving surface of the thumb base and an open position in which the cutting edge is rotationally spaced apart from the blade receiving surface of the thumb base; and a first linear actuator having a first end attached to the shearing blade member and a second end attachable to one of the set consisting of the boom and the thumb so that extension and retraction of the linear actuator causes the shearing blade member to rotate about the blade pivot axis. |
