Patent ID: 6763661
Filing Date: 2004-07-20
Classification: E02F,F15B

Abstract:
An apparatus for creating vibration of an appendage of a work vehicle, the apparatus comprising:a hydraulic cylinder coupled between a first portion of the work vehicle and the appendage and including a first chamber, a second chamber, and a piston, wherein movement of the piston results in corresponding movement of the appendage with respect to the first portion of the work vehicle; a valve assembly coupled between the first and second chambers, a pump, and a tank, wherein the valve assembly governs whether hydraulic fluid is provided from the pump to the first and second chambers and to the tank from the first and second chambers; and a control element coupled to the valve assembly, wherein the control element in response to a command causes a status of at least a first portion of the valve assembly to repeatedly alternate with time so that the hydraulic fluid is alternately provided from the pump to the first chamber and provided to the tank from the first chamber, so that vibration occurs at the piston and is in turn provided to the appendage.