Hydraulic pump drive
AssigneeCNH America LLC
InventorsPhillip J. Ehrhart, Wayne D. Thaxton
Life of this patent
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Abstract
A hydraulic pump drive is mounted to the tongue of an agricultural implement. Connecting components between the pump and the drawbar extender of the towing tractor aim the pump input shaft toward the tractor. A short telescoping PTO assembly connects the pump shaft to the tractor PTO shaft using conventional PTO components operating in a nominal equal angle configuration.
Claims8
In combination with a hydraulically-driven agricultural implement having a tongue adapted to be pivotably attached to the drawbar of a tractor, and an agricultural tractor having a PTO shaft with a longitudinal horizontal axis extending along a line generally parallel to the direction of travel of the tractor, a hydraulic pump drive comprising:
- an hydraulic pump with an input shaft, said pump affixed to an upper pivot plate that is, in turn, rotatably affixed to the tongue at a first location by a support pivot pin having a generally vertical axis;
- a horizontal tongue pivot plate rigidly affixed to the tongue and extending forwardly therefrom, said tongue pivot plate rotatably affixed at a second location to the drawbar by a tongue pivot pin having a generally vertical axis, the generally vertical axes of said support pivot pin and said tongue pivot pin being vertically axially aligned;
- a mechanism interconnecting said drawbar and said upper pivot plate such that said input shaft is directed toward the tractor regardless of the angle of the tongue relative to the direction of travel of the tractor;
- and
- a PTO assembly interconnecting said pump input shaft and the PTO shaft.
In combination with a hydraulically-driven agricultural implement having a tongue adapted to be pivotably attached to the drawbar extender of a tractor, and an agricultural tractor having a PTO shaft with a longitudinal horizontal axis extending along a line generally parallel to the direction of travel of the tractor, a hydraulic pump drive comprising:
- an hydraulic pump with an input shaft, said pump affixed to an upper pivot plate that is, in turn, rotatably affixed to the tongue at a first location by a support pivot pin having a generally vertical axis;
- a horizontal tongue pivot plate rigidly affixed to the tongue and extending forwardly therefrom, said tongue pivot plate rotatably affixed at a second location to the drawbar extender by a tongue pivot pin having a generally vertical axis, the generally vertical axes of said support pivot pin and said tongue pivot pin being vertically axially aligned;
- a mechanism interconnecting said drawbar extender and said upper pivot plate such that said input shaft is directed toward the tractor regardless of the angle of the tongue relative to the direction of travel of the tractor;
- and
- a PTO assembly interconnecting said pump input shaft and the PTO shaft.
Dependencies are inferred from the claim text.