Valves and valve actuation – Electrically actuated valve – Balanced valve
Patent
1995-06-07
1996-04-02
Schwadron, Martin P.
Valves and valve actuation
Electrically actuated valve
Balanced valve
251282, F16K 3106
Patent
active
055033652
ABSTRACT:
A directly controlled hydraulic pressure valve includes a valve housing and an outer valve sleeve which is placed in a port of the valve housing. The port is closed by a cover. A cylindrical inflow component is arranged in the interior of the valve sleeve. The inflow component has a first portion whose diameter is smaller than the internal diameter of the valve sleeve and a second portion having a greater diameter, wherein the outer valve sleeve rests with its end face against the second portion. The pressure valve further includes a cup-shaped tubular piston which is longitudinally movably arranged in an annular space between the valve sleeve and the inflow component, wherein the bottom of the tubular piston is located remote from the second portion. An annular groove is formed in the first portion of the inflow component. Axially extending inflow ducts are provided in the end face of the second portion of the inflow component. The inflow ducts connect the annular groove to an inflow bore in the valve housing. A deflection chamber is formed at the outer circumference of the first portion of the inflow component and adjacent the second portion, wherein the deflection chamber is in communication with outlet openings formed in the valve sleeve. The valve control edges are formed by an edge of the annular groove and an adjacent edge of the tubular piston. The valve further includes a device for exerting a force on the inflow component in a direction which is directed opposite the direction of the pressure force in the inflow bore.
REFERENCES:
patent: 4679765 (1987-07-01), Kramer et al.
patent: 4796854 (1989-01-01), Ewing
patent: 5106053 (1992-04-01), Miller et al.
patent: 5163654 (1992-11-01), Borsatti et al.
Backe Wolfgang
Killing Bernd
Latour Christoph
Denison Hydraulik GmbH
Kueffner Friedrich
Lee Kevin L.
Schwadron Martin P.
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