Control valve
AssigneeHerion-Werke KG
InventorHelmut Ott
Life of this patent
Estimating the term…
Abstract
A directional control valve includes a housing with a pressure inlet port, two working ports and a vent port with one working port directly connected to the vent port and the other working port communicating with the vent port via a control piston. The control piston includes a sliding valve in the area of one working port and a seat valve in the area of the other working port. A throttle bush rotatably arranged in the housing and a throttle screw rotatable relative to the throttle bush cooperate with the control valve to modify and throttle separately and independently from each other the cross sectional ventilating areas for the working ports.
Claims12
A directional control valve unit;
- comprising:
- a housing having fluid inlet means, fluid outlet means including two working ports, and vent means with one working port directly connectable to said vent means;
- valve means including a control valve via which said other working port is connectable with said vent means, said control valve being accommodated in said housing and having one section in form of a seat-type valve in the area of said one working port and another section in form of a sliding-type valve in the area of said other working port;
- and
- throttle means for controlling ventilation of said fluid outlet means and including a throttle bush rotatably arranged in said housing and cooperating with said valve means.
Dependencies are inferred from the claim text.