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US 2014/0271079 A1Published application
Hydraulic grapple damper
AssigneeDeere & Company
InventorsGary R. Fichtinger, Robert T. Carr, Timothy L. Jerew, Monica C. Allen
Life of this patent
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Abstract
A work vehicle is disclosed having a chassis, a work tool rotatably coupled to the chassis, and one or more hydraulic dampers. The hydraulic damper includes a moveable body that resists rotation in a hydraulic chamber to resist rotation of the work tool relative to the chassis.
Claims20
A work vehicle including:
- a chassis;
- at least one traction device supporting the chassis on the ground;
- a work tool configured to rotate relative to the chassis about a first axis;
- a first damper configured to resist movement of the work tool about the first axis, the first damper including:
- a housing that defines a chamber for receipt of hydraulic fluid;
- and
- a moveable body that rotates in the chamber, the hydraulic fluid resisting rotation of the moveable body in the chamber to resist movement of the work tool about the first axis.
4 more elements
A work vehicle including:
- a chassis;
- at least one traction device supporting the chassis on the ground;
- a work tool configured to rotate relative to the chassis about a first axis;
- a first damper configured to resist movement of the work tool about the first axis, the first damper including:
- a housing that defines a chamber for receipt of hydraulic fluid;
- and
- a moveable body in the chamber having a neutral state, a first dampened state, and a second dampened state opposite the first dampened state, the moveable body rotating in the chamber from the neutral state to the first and second dampened states.
4 more elements
A method of operating a work vehicle, the work vehicle including a chassis and a work tool rotatably coupled to the chassis, the method including the steps of:
- providing a housing with a chamber that contains hydraulic fluid;
- and
- rotating a moveable body through the hydraulic fluid in the chamber to resist rotation of the work tool relative to the chassis about an axis.
Dependencies are inferred from the claim text.