Valve, in particular pilot-operated proportional directional poppet valve
AssigneeHydac Fluidtechnik GmbH
InventorsPeter Bruck, Markus Bill
Life of this patent
Estimating the term…
Abstract
A valve, in particular a pilot-operated proportional directional poppet valve, has a valve housing (7) with a fluid inlet (21) and a fluid outlet (23). The fluid stream between the fluid inlet (21) and the fluid outlet (23) is adjustable by a main piston (27). A pilot valve chamber (37) on a rear face (29) of the main piston (27) has a pilot valve closing member (33) movable by an actuating device (69) to adjust the fluid stream between the pilot valve chamber (37) and the fluid outlet (23). A supply aperture (3) is between the fluid inlet (21) and the pilot valve chamber (37). The opening cross-section of the supply aperture (3) can be reduced by a control element (49).
Claims24
A valve, comprising:
- a valve housing having a fluid inlet and a fluid outlet;
- a main piston movable in said housing and adjusting a main fluid stream between said fluid inlet and said fluid outlet;
- a pilot valve chamber on a rear face of said main piston;
- a pilot valve closing member movable by an actuator and adjusting a pilot fluid stream between said pilot chamber and said fluid outlet;
- and
- a supply aperture located between said fluid inlet and pilot chamber, an opening cross section of said supply aperture being reduceable by a control element assigned to said valve closing member.
A valve, comprising:
- a valve housing having a fluid inlet and a fluid outlet;
- a main piston movable in said housing and adjusting a main fluid stream between said fluid inlet and said fluid outlet;
- a pilot valve chamber on a rear face of said main piston;
- a pilot valve closing member movable by an actuator and adjusting a pilot fluid stream between said pilot chamber and said fluid outlet;
- and
- a supply aperture located between said fluid inlet and pilot chamber, an opening cross section of said supply aperture being reduceable by a control element, said supply aperture including a plurality of aperture bores, an opening cross section of at least one of said aperture bores being reduceable by a control element.
A valve, comprising:
- a valve housing having a fluid inlet and a fluid outlet;
- a main piston movable in said housing and adjusting a main fluid stream between said fluid inlet and said fluid outlet;
- a pilot valve chamber on a rear face of said main piston;
- a pilot valve closing member movable by an actuator and adjusting a pilot fluid stream between said pilot chamber and said fluid outlet;
- a supply aperture located between said fluid inlet and pilot chamber, an opening cross section of said supply aperture being reduceable by a control element;
- and
- a maximum volume controller in said main piston in an outflow between said pilot valve chamber and said fluid inlet, said maximum volumetric flow controller including a control piston acted on a front face thereof by pressure of fluid flowing out of said pilot valve chamber and acted on a rear face thereof by a spring.
Dependencies are inferred from the claim text.