US 4,071,046 AGranted

Directional control poppet valve

OwnerH. Alton Catesinventor

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Abstract

A valve system for controlling the direction of flow of pressurized fluid. The valve system includes a valve housing, with an inlet port for receiving pressurized fluid therein, a first cylinder port and a second cylinder port. The housing is further constructed with first and second exhaust ports. Passageways connect the inlet port to the first cylinder port and to the second cylinder port. Passageways also extend from the first cylinder port to the first exhaust port and from the second cylinder port to the second exhaust port. A pair of pistons and corresponding poppet valves are slidable within the housing to control flow of fluid through the passageways. In one embodiment, the pistons and poppet valves are moved by communicating fluid pressure from the inlet port either above or below the pistons. In an alternative embodiment, the pistons and popper valves are mechanically actuated.

Claims22

Dependent claims

A valve system for controlling the direction of flow of a pressurized fluid to opposite ends of a cylinder of a servo motor to actuate the piston of the servo motor in opposite directions, comprising:

a valve housing;
an inlet port for receiving pressurized fluid therethrough;
a first cylinder port in the housing communicating with one end of the cylinder of the servo motor;
a second cylinder port in the housing communicating with the opposite end of the servo motor;
first and second exhaust ports in the housing;
a first passageway extending from the inlet port to the first cylinder port;
a second passageway extending from the inlet port to the second cylinder port;
a third passageway extending from the first cylinder port to the first exhaust port;
a fourth passageway extending from the second cylinder port to the second exhaust port;
a first poppet valve normally seated against the housing to close the first passageway;
a second poppet valve normally seated against the housing to close the second passageway;
a first piston slidable within the valve housing and normally seated against the first poppet valve to close the third passageway;
a second piston slidable within the valve housing and normally seated against the second poppet valve to close the fourth passageway;
and
means for moving the first and second pistons to selectively control the flow of fluid through the first, second, third and fourth passageways.

12 more elements

A valve system for controlling the flow of pressurized fluid, comprising:

a valve housing;
an inlet port for receiving pressurized fluid;
a cylinder port in the housing;
an exhaust port in the housing;
a first passageway extending from the inlet port to the cylinder port;
a second passageway extending from the cylinder port to the exhaust port;
a poppet valve slidably positioned within the housing and normally seated against a valve seat within the housing to close the first passageway;
a piston slidable within the housing and normally seated against the poppet valve to close the second passageway;
and
means for selectively moving the piston to open and close the first and second passageways to control the flow therethrough.

7 more elements

Dependencies are inferred from the claim text.