Pressure control valve
AssigneesFujikoki Corporation, Denso Corporation
InventorsSadatake Ise, Masaki Tomaru, Hiroshi Kainuma, Yoshitaka Tomatsu, Masayuki Takeuchi
Life of this patent
Estimating the term…
Abstract
A pressure control valve, which has a main valve for control, capable of opening and closing a valve hole by means of a diaphragm, and controls the pressure of a fluid by the agency of the main valve for control, comprises a non-return auxiliary valve located around the main valve for control so as to be coaxial therewith. The non-return auxiliary valve includes a cylindrical portion to be guided by a valve guard body having the valve hole therein and an annular rib extending outward from one end of the cylindrical portion. The rib can engage an auxiliary-valve seat on an outlet-side case.
Claims6
A pressure control valve, comprising:
- a main valve for control, capable of opening and closing a valve hole by means of a diaphragm, and controls the pressure of a fluid by the agency of the main valve for control;
- a housing having a base portion at least a part of said main valve for control is housed within the housing;
- and
- a non-return auxiliary valve for control in the direction of operation thereof, held in the base portion of the housing such that it is located right under the main valve wherein
- when the fluid flows from a second inlet to a main passage, the main valve is opened while the non-return auxiliary valve is closed and when the fluid flows from the main passage to the second inlet, the main valve is closed while the non-return auxiliary valve is opened.
A pressure control valve, comprising:
- a main valve for control, capable of opening and closing a valve hole by means of a diaphragm, and controls the pressure of a fluid by the agency of the main valve for control;
- and
- a non-return auxiliary valve surrounding the main valve for control so as to be coaxial therewith wherein
- when the fluid flows from a second inlet to a main passage, the main valve is opened while the non-return auxiliary valve is closed and when the fluid flows from the main passage to the second inlet, the main valve is closed while the non-return auxiliary valve is opened.
A pressure control valve which has a main valve for control, capable of opening and closing a valve hole by means of a diaphragm, and controls the pressure of a fluid by the agency of the main valve for control, comprising:
- a non-return auxiliary valve located around the main valve for control so as to be coaxial therewith, wherein said non-return auxiliary valve includes a cylindrical portion to be guided by a valve guard body having the valve hole therein and an annular rib extending outward from one end of the cylindrical portion and wherein said rib can engage an auxiliary-valve seat on an outlet-side case having therein a spring chamber for a main valve-closing spring.
Dependencies are inferred from the claim text.