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US 2021/0259154 A1Published application
Adjustable lift rate system
AssigneeDeere & Company
InventorsBRENT G. RINHOLM, ZACKARY P. SIPPER
Life of this patent
Estimating the term…
Abstract
An adjustable lift rate system on a grass mowing machine such as a riding greensmower having a lift and lower circuit including a plurality of hydraulic lift cylinders to lift and lower a plurality of cutting units, and a controller providing a current to a proportional solenoid valve to bypass the hydraulic lift cylinders. An operator control may be used to adjust the current to the proportional solenoid valve to adjust the lift and lower rate of the cutting units.
Claims12
An adjustable lift rate system, comprising:
- a riding greensmower having a lift and lower circuit including a plurality of hydraulic lift cylinders to lift and lower a plurality of cutting units;
- and
- a controller providing a current to a proportional solenoid valve to bypass the hydraulic lift cylinders;
- and
- an operator control on the riding greensmower for adjusting the current to the proportional solenoid valve to adjust a lift rate and a lower rate of the plurality of cutting units.
2 more elements
An adjustable lift rate system comprising:
- a lift and lower circuit for raising and lowering a plurality of cutting units of a grass mowing machine;
- and
- a controller that controls a rate of raising and lowering the cutting units based on an operator adjustable display, and reduces the rate during the raising and lowering of the plurality of cutting units.
An adjustable lift rate system comprising:
- a plurality of cutting units, each cutting unit supported by a lift arm that is raised and lowered using a hydraulic cylinder;
- and
- a proportional solenoid valve that is operator adjustable to adjust how much hydraulic fluid is diverted from the hydraulic cylinders.
Dependencies are inferred from the claim text.