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US 9,752,596 B2Granted
Variable pressure control system for dual acting actuators
AssigneePrecision Planting LLC
InventorsDerek A. Sauder, Jeremy J. Hodel
Life of this patent
Estimating the term…
Abstract
A variable pressure control system for varying pressures in the fluid circuits of a dual acting actuator over a range of pressures. The variable pressure control system includes a controller that cooperates with pressure regulators for regulating the desired pressure in the fluid circuits.
Claims20
A pressure control system, comprising:
- a first element imposing a force on a second element;
- a dual acting actuator operably coupled to said first element, said dual acting actuator having a down chamber whereby increased pressure in said down chamber increases said force, said dual acting actuator having a lift chamber whereby increased pressure in said lift chamber decreases said force;
- a pressure source;
- and
- a controller in fluid communication with said pressure source, with said lift chamber and said down chamber, said controller configured to selectively maintain a lift pressure in said lift chamber, wherein said controller comprises a pressure regulating valve that selectively maintains a down pressure in said down chamber at any of a continuous range of pressures.
2 more elements
A pressure control system, comprising:
- a first element imposing a force on a second element, wherein said first element comprises a wheel, said wheel disposed to rollingly contact said second element, said wheel traveling along a path of travel, said wheel angled with respect to said path of travel;
- a dual acting actuator operably coupled to said first element, said dual acting actuator having a down chamber whereby increased pressure in said down chamber increases said force, said dual acting actuator having a lift chamber whereby increased pressure in said lift chamber decreases said force;
- a pressure source;
- and
- a controller, said controller in fluid communication with said pressure source, with said lift chamber and with said down chamber, said controller configured to modify a lift pressure in said lift chamber, wherein said controller comprises a pressure regulating valve that modifies a down pressure in said down chamber to any of a continuous range of pressures.
2 more elements
Dependencies are inferred from the claim text.