Earth working – Mast type hitch
Reexamination Certificate
2005-12-06
2005-12-06
Will, Thomas B. (Department: 3671)
Earth working
Mast type hitch
C172S007000
Reexamination Certificate
active
06971453
ABSTRACT:
A control system controls a three point implement hitch assembly of a tractor. The three point implement hitch assembly includes an upper link and two lower links. The upper link includes an adjustable length double acting hydraulic unit. The position of each lower link is controlled by an adjustable length double acting hydraulic unit. A hydraulic circuit controls communication between the hydraulic units, a hydraulic supply and a hydraulic tank. The circuit permits each hydraulic unit to be controlled independently of one another.
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Deere & Company
Mammen Nathan
Will Thomas B.
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