Arm assembly for excavation apparatus and method of using same
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United States of America Patent
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Feb 14, 2006
Grant Date -
Jan 1, 2004
app pub date -
Jun 23, 2003
filing date -
Jun 24, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An arm assembly for an excavator includes an arm comprising a first hook including a first open mouth. The arm further includes a first pin capturing system that selectively obstructs the first open mouth. A link is movable relative to the arm and comprises a second hook including a second open mouth. The second open mouth is oriented toward the arm, and the link further comprises a second pin capturing system that selectively obstructs the second open mouth. The first and second pin assemblies of an attachment are selectively captured in the first and second hooks. The pin assemblies include a sleeve rotatably positioned on an attachment pin that extends between ribs of the attachment. The sleeve includes a bore that closely receives the attachment pin and the length of the sleeve is selected so that the sleeve fits closely between the attachment ribs, thereby allowing the arm assembly to pick-up various attachments with different pin diameters, ribs spacings and pin-to-pin distances. The arm assembly can be coupled to and decoupled from an associated attachment by an operator without assistance from a ground crew.
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