Biasing mechanism for header tilt on a center-pivot mower
AssigneeCNH Industrial America LLC
InventorsJeffrey Fay, II, Glenn Bird, Jason Shonk
Life of this patent
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Abstract
A pull-type mower having a frame and a header movably attached to the frame, the header including; a cutting mechanism; a conditioning mechanism; a lift mechanism comprising one or more hydraulic actuators, the lift mechanism configured to lift the frame relative to a ground surface below the mower; a tilt mechanism comprising one or more hydraulic actuators, the tilt mechanism configured to rotate the header about an axis transverse to a fore-aft axis of the header; and a spring mechanism arranged in parallel to the one or more tilt hydraulic actuators, the spring mechanism configured to apply a biasing force that tilts the header forward when the one or more tilt hydraulic cylinders are depressurized.
Claims13
A pull-type mower comprising:
- a frame;
- a header movably attached to the frame, the header comprising a cutting mechanism and a conditioning mechanism;
- a lift mechanism comprising one or more lift hydraulic actuators, the lift mechanism configured to lift the frame relative to a ground surface below the pull-type mower;
- a tilt mechanism comprising one or more tilt hydraulic actuators, the tilt mechanism configured to rotate the header about an axis transverse to a fore-aft axis of the header;
- and
- a spring mechanism arranged in parallel to the one or more tilt hydraulic actuators, the spring mechanism configured to apply a biasing force that tilts the header forward when the one or more tilt hydraulic actuators are depressurized.
A pull-type mower comprising:
- a frame;
- a header movably attached to the frame, the header comprising a cutting mechanism and a conditioning mechanism;
- a lift mechanism comprising one or more lift hydraulic actuators, the lift mechanism configured to lift the frame relative to a ground surface below the pull-type mower;
- and
- a tilt mechanism comprising one or more tilt hydraulic actuators, the tilt mechanism configured to rotate the header about an axis transverse to a fore-aft axis of the header;
- wherein the one or more lift hydraulic actuators each comprise a single-acting hydraulic cylinder, wherein the one or more lift hydraulic actuators extend when pressurized to apply a lifting force to the frame;
- and
- wherein the one or more tilt hydraulic actuators each comprise a double-acting hydraulic cylinder and are configured to extend when a barrel end of the one or more tilt hydraulic actuators is pressurized to apply a biasing force that tilts the header forward.
Dependencies are inferred from the claim text.