초록 ▼

A valve assembly has a unitary teflon valve housing with six peripheral facets. A recessed area on the surface of each facet forms a valve seat. Pairs of fluid channels formed in the housing each terminate at openings at a central, planar area of a corresponding valve seat. A pair of rigid tubes are

A valve assembly has a unitary teflon valve housing with six peripheral facets. A recessed area on the surface of each facet forms a valve seat. Pairs of fluid channels formed in the housing each terminate at openings at a central, planar area of a corresponding valve seat. A pair of rigid tubes are disposed in the openings at each valve seat, each tube forming a fluid-tight seal with periphery of the corresponding opening. The tubes extend slightly beyond the surface of the housing by a predetermined clearance. A diaphragm made of a resilient material covers the valve seat. The periphery of the diaphragm is in fluid-tight sealing engagement with the periphery of the valve seat. A central portion of the diaphragm is coupled to a solenoid above the diaphragm. The solenoid moves the diaphragm central portion between a closed position toward the valve seat and an open position away from the valve seat. When in the closed position, the diaphragm central portion sealingly covers the extended ends of the tubes while the predetermined clearance is maintained between the diaphragm and the valve seat to prevent fluid-borne particles from being compressed therebetween. When in the open position, the diaphragm central portion uncovers the ends of the tubes to allow fluid to flow between the fluid channels.

대표청구항 ▼

[ What is claimed is:] [1.] A valve, comprising:a valve housing having a recessed area forming a valve seat, the valve seat being substantially planar at a central area thereof and having a sealing edge around the periphery thereof, the valve housing having formed therein first and second fluid chan

[ What is claimed is:] [1.] A valve, comprising:a valve housing having a recessed area forming a valve seat, the valve seat being substantially planar at a central area thereof and having a sealing edge around the periphery thereof, the valve housing having formed therein first and second fluid channels, the channels terminating at openings at the central area of the valve seat;a pair of tubes disposed respectively in the fluid channel openings at the valve seat, each tube forming a fluid-tight seal with the periphery of the corresponding opening, and one end of each tube extending slightly above the central area of the valve seat;a diaphragm covering the valve seat, the diaphragm being made of a resilient impermeable material and having a peripheral sealing edge in fluid-tight sealing engagement with the sealing edge of the valve seat, the diaphragm having a central portion being movable between a closed position toward the valve seat and an open position away from the valve seat while the sealing engagement between the respective edges of the diaphragm and the valve seat is maintained, the central portion of the diaphragm when in the closed position extending toward the valve seat sufficiently to sealingly cover the extended ends of the tubes, and the central portion when in the open position extending away from the valve seat such that the extended ends of the tubes are uncovered; anda solenoid coupled to the central portion of the diaphragm, the solenoid being operative to maintain the central portion of the diaphragm in both the closed position and in the open position as a function of electrical signals applied to the solenoid, the solenoid applying sufficient force to the diaphragm central portion when in the closed position to maintain the respective seals between the diaphragm central portion and the extended ends of the tubes during pressurized operation of the valve.