Fluid control valve
AssigneeDenso Corporation
InventorsShigeto Tsuge, Yasuo Kato
Life of this patent
Estimating the term…
Abstract
A fluid control valve has: a housing in which a fluid passage is formed; a valve seat in which a fluid flow hole is formed to be communicated with the fluid passage; and a valve that is formed from rubber elastic body. At least a part of the housing is formed from resin. The valve has a valve seal portion and is installed in the housing to be able to close the fluid flow hole. In a valve-closing time, the valve seal portion is seated on the valve seat. The valve seal portion is coated by a thin diamond-like carbon coating having hardness between Hv 50 and Hv 500 in Vickers hardness.
Claims17
A fluid control valve comprising:
- a housing in which a fluid passage is formed and at least a part of which is formed from resinous material;
- a valve seat in which a fluid flow hole is formed to be communicated with the fluid passage;
- and
- a valve that is formed from rubber elastic body, has a valve seal portion and is installed in the housing to be able to close the fluid flow hole so that the valve seal portion is seated on the valve seat and to open the fluid flow hole so that the valve seal portion is lifted off the valve seat, the valve seal portion being coated by a thin diamond-like carbon coating having a hardness between Hv 50 and Hv 500 in Vickers hardness.
A fluid control valve comprising:
- a housing in which a fluid passage is formed and at least a part of which is formed from resinous material;
- a valve seat in which a fluid flow hole is formed to be communicated with the fluid passage;
- a sealing rubber that is formed from rubber elastic body and has a rubber seal portion, the rubber seal portion being coated by a thin diamond-like carbon coating having a hardness between Hv 50 and Hv 500 in Vickers hardness;
- and
- a valve on which the sealing rubber is disposed and that is installed in the housing to be able to close the fluid flow hole by seating on the valve seat so that the rubber seal portion seals a gap between the valve seat and the valve and to open the fluid flow hole by being lifted off the valve seat.
An electromagnetic combination valve comprising:
- an electromagnetic driving portion having a coil that generates a magnetomotive force when it is energized;
- a housing at least a part of which is formed from resinous material and that has a valve seat formed in an approximately cylindrical shape in which a fluid passage hole is formed;
- a spring that generates an urging force in an axial direction of the housing;
- a first valve that is installed in the housing to be slidable in the axial direction to be opened by being attracted to one side in the axial direction by the magnetomotive force generated by the coil;
- and
- a second valve that is installed in the housing to be slidable in the axial direction to be seated on the valve seat of the housing by being sandwiched between the valve seat of the housing and the first valve and to be opened by being urged to the one side in the axial direction by the urging force of the spring when a pressure to urge the second valve to close the second valve decreases to a predetermined value in a condition that the first valve is opened, the second valve having a sealing rubber on an end face thereof to face the valve seat of the housing to be able to seat on the valve seat of the housing, the sealing rubber being coated by a thin diamond-like carbon coating having a hardness between Hv 50 and Hv 500 in Vickers hardness.
Dependencies are inferred from the claim text.