Patent ID: 7913930
Filing Date: 2011-03-29
Classification: A01C,A01M

Abstract:
1. A spray linkage for a crop sprayer, comprising a support and a central frame pivotally connected to the support, the central frame being pivotable relative to the support from a neutral position about an upright oscillating axis, and first and second hydraulic cylinders each pivotally connected at one end to the support and at another end to the central frame, the first and second hydraulic cylinders extending or retracting when the central frame pivots relative to the support from the neutral position, characterized in that the first hydraulic cylinder has a first and a second hydraulic chamber, the second hydraulic cylinder has a first and second hydraulic chamber, a first hydraulic line hydraulically connected to the first hydraulic chamber of the first hydraulic cylinder and to the second hydraulic chamber of the second hydraulic cylinder, a second hydraulic line connected to the second hydraulic chamber of the first hydraulic cylinder and to the first hydraulic chamber of the second hydraulic cylinder, means for throttling a hydraulic flow exiting from one of the hydraulic chambers providing substantially unthrottled hydraulic flow entering into one of the hydraulic chambers.