Back to results
US 11,828,376 B2Granted
High stability regulator
AssigneeThe Oilgear Company
InventorsJared Schlueter, Dan Mizell
Life of this patent
Estimating the term…
Abstract
A vent valve opens to provide a fluid path from a regulated pressure port to a vent port, a supply valve opens to provide a fluid path from the regulated pressure port to a supply pressure port. A control piston has a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve.
Claims18
A hydraulic regulator comprising:
- a vent valve that opens to provide a fluid path from a regulated pressure port to a vent port;
- a supply valve that opens to provide a fluid path from the regulated pressure port to a supply pressure port;
- and
- a control piston having a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve;
- wherein the vent cam and the supply cam are spaced apart axially along the control piston and the vent valve and the supply pressure valve are spaced apart from one another such that only one of the vent valve and the supply valve are opened at once;
- wherein the control piston moves in a first direction to open the vent valve and in a second, opposite direction to open the supply valve and
- wherein the control piston is exposed on a first end thereof to the regulated pressure port such that the piston moves in the first direction when a regulated pressure exceeds a predetermined limit.
4 more elements
A hydraulic regulator comprising:
- a pilot piston with an outer cam profile including a vent lobe at a first end of the cam profile and a first supply lobe on a distal second end of the cam profile, the vent lobe and the first supply lobe extending radially away from a flat medial portion of the cam profile;
- a first ball actuating a vent valve upon contact with the vent lobe;
- and
- a second ball actuating a first supply valve upon contact with the first supply lobe;
- wherein the piston is biased to respond to a regulated pressure at a regulated port by moving axially first direction to bring the first ball in contact with the vent lobe when the regulated pressure exceeds a setpoint, and to respond to the regulated port pressure by moving axially in a second direction to bring the second ball in contact with the first supply lobe when the regulated pressure falls below the setpoint;
- wherein opening of the vent valve exposes the regulated port to vent, and opening of the first supply valve exposes the regulated port to a supply pressure;
- and
- wherein the outer cam profile is configured such that the vent valve and the first supply valve cannot open simultaneously.
5 more elements
A hydraulic actuator comprising:
- a supply port, a vent port, and a regulated port;
- a supply valve biased in a closed position, that provides a fluid connection from the supply port to the regulated port when in an open position;
- a vent valve biased in a closed position that provides a fluid connection from the vent port to the regulated port when in an open position;
- and
- a control piston having a first end and a second end with a linear cam profile between the first end and the second end, the outer cam profile having a narrower medial portion, a vent lobe on a first end, and a supply lobe on a second end;
- wherein a first end of the control piston receives a biasing force and the second end of the piston is exposed to the regulated port;
- wherein the control piston moves the vent lobe into contact with the vent valve thereby opening it when a pressure at the regulated port exceeds a set point;
- wherein the control piston moves the supply lobe into contact with the supply valve thereby opening it when the pressure at the regulated port falls below the set point;
- and
- wherein the supply valve and the vent valve are spaced with respect to the linear cam profile such that only one of the supply valve and the vent valve can be opened at once, but both the supply valve and the vent valve may be closed simultaneously.
7 more elements
Dependencies are inferred from the claim text.