Patent ID: 6662895
Filing Date: 2003-12-16
Classification: F16H

Abstract:
In a turf machine including a base mounted on a plurality of wheels and having a turf machine operator interface, a hydraulic control system for regulating the speed and direction of the turf machine, comprising:an engine; a hydraulic pump, driven by the engine, having an inlet and an outlet providing a source of unidirectional pressurized hydraulic fluid useful for driving hydraulic motors; a first valve set having an inlet connected to the hydraulic Pump outlet and a first and second outlet; a first hydraulic motor having an inlet connected to the first outlet of the first valve set and an outlet; a second valve set having an inlet connected to the second outlet of the first valve set, further having a first and second outlet, the second outlet being connected to the inlet of the hydraulic pump; and a second hydraulic motor having an inlet connected to the first outlet of the second valve set; wherein said first valve set contains a first variable volume control valve which regulates volume and direction of fluid flow to the first hydraulic motor; and wherein the second valve set contains a second variable volume control valve which regulates volume and direction of the fluid flow to the second hydraulic motor, said first valve set further containing a first slave-operated pressure compensation valve; and wherein the second valve set further containing a second slave-operated pressure compensated valve.