Clamping arm assembly for a backhoe
AssigneeJ. I. Case Company
InventorCharles B. Hanson
Life of this patent
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Abstract
An improved clamping arm assembly for a backhoe or similar excavator includes an arm link adapted to be fixedly mounted beneath the lower surface of the dipper arm of the excavator. A clamping arm is pivotally connected with the arm link, and is movable into and out of engagement with the bucket of the excavator by a fluid actuator in order to provide a claw-like working action. The clamping arm assembly includes a pair of mounting plates respectively disposed on opposite sides of the dipper arm which are adapted to engage support pins on the arm, and a lock bolt arrangement for detachably fixing the assembly to the dipper arm of the excavator.
Claims12
An improved detachable clamping arm assembly for use with an excavator having a dipper arm movable with respect to a ground-supported frame and a bucket pivotally supported on the distal end of said dipper arm for movement by a bucket fluid actuator, comprising:
- an arm link adapted to abut the lower surface of said dipper arm in fixed relation thereto,
- a clamping arm pivotally connected to said arm link for pivotal movement with respect thereto,
- an arm fluid actuator having a first end pivotally connected to said arm link and spaced from the pivotal connection of said clamping arm to said arm link, and a second end pivotally connected to said clamping arm whereby selective actuation of said arm fluid actuator selectively pivots said arm toward and away from engagement with said bucket for grasping objects, and
- mounting means for detachably mounting said arm link in abutting relation to said dipper arm.
An improved detachable clamping arm assembly for use with an excavator having a dipper arm supported by a ground-supported frame for articulated movement with respect thereto, a bucket pivotally supported by a bucket pivot pin on the distal end of said dipper arm for movement about a horizontal axis, and a bucket fluid actuator for selectively pivoting said bucket through a linkage operatively connecting said bucket fluid actuator, said linkage including a link pivot pin on said dipper arm spaced from said bucket pivot pin, comprising:
- an arm link adapted to abut the lower surface of said dipper arm,
- a clamping arm pivotally connected to said arm link by an arm pivot pin
- an arm fluid actuator having one end pivotally connected to said arm link and spaced from said arm pivot pin, and another end pivotally connected to said clamping arm whereby selective actuation of said arm fluid actuator selectively pivots said arm toward and away from said bucket for accommodating grasping objects between said arm and said bucket,
- a pair of mounting plates disposed on respective opposite sides of said dipper arm and arm link, said mounting plates being engageable with said bucket pivot pin and said link pivot pin and supporting said arm link by said arm pivot pin, and
- adjustable lock bolt means threaded to said arm link, said arm pivot pin being disposed intermediate said lock bolt means and said first end of said arm fluid actuator,
- said lock bolt means being movable between one position wherein said mounting plates are maintained in engagement with said link and bucket pivot pins and said arm link is maintained in fixed abutting relation to the lower surface of said dipper arm, and another position wherein said mounting plates are disengageable from said link and bucket pivot pins and said clamping arm assembly is detachable from said dipper arm.
Dependencies are inferred from the claim text.