Patent ID: 7255323

Claim:
A pressure activated valve for allowing fluid flow therethrough when pressure of the fluid at the inlet thereof exceeds a predetermined amount and for preventing flow of fluid therethrough whenever the pressure exceeds a second greater predetermined amount, the valve including in combination: a valve housing having a fluid inlet and a fluid outlet; first and second spaced apart valve seats in the valve housing oriented to permit fluid flow therethrough from the fluid inlet of the valve housing to the fluid outlet thereof; a first permanent magnet mounted in a fixed position between the outlet of the valve housing and the second valve seat and allowing fluid flow thereby; a second permanent magnet mounted for reciprocal movement between the first and second valve seats, with the polarities of the first and second magnets oriented to cause a repelling force to exist between the magnets, such that in the absence of any fluid pressure at the inlet of the valve housing, the second permanent magnet is moved by the first permanent magnet to close the first valve seat with a first predetermined pressure.