Excavating – Combined or convertible – Having quick-connect coupling
Reexamination Certificate
2005-11-15
2005-11-15
Petravick, Meredith C. (Department: 3671)
Excavating
Combined or convertible
Having quick-connect coupling
C414S723000
Reexamination Certificate
active
06964122
ABSTRACT:
A coupler for coupling an accessory to a dipper arm and a control system for such a coupler. The invention concerns a quick hitch coupler for coupling an accessory to a dipper arm of a back actor such as may be used by an earth working apparatus. The quick hitch coupler comprises a body member adapted for coupling to the dipper arm, a fixed engaging means mounted on the body member for engaging a first one of a pair of coupling pins mounted on the accessory, and a moveable engaging means mounted on the body member for engaging a second one of the pair of coupling pins of the accessory. The invention also relates to a control system for controlling the release of an accessory from any quick hitch coupler coupling the accessory to a hydraulically operable arm of a machine, operated by a pressurized hydraulic system.
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Barron James David
Cunningham Bartholomew James
De Courcey Thomas Martin
McKeown Anthony
Petravick Meredith C.
Tomkins & Co.
Zinkl Gregory M.
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