Patent ID: 7628170
Filing Date: 2009-12-08
Classification: F16K,Y10T

Abstract:
1. A valve comprising: a valve housing having an inlet, an outlet, and a valve chamber therein, the valve chamber having a first valve port opening in communication with the inlet and a second valve port opening in communication with the outlet; a modulating member disposed in the valve chamber approximate the first valve port opening and second valve port opening, the modulating member having a central aperture, and a first tapered arcuate slot extending completely through the modulating member and second tapered arcuate slot extending completely through the modulating member, the first and a second tapered arcuate slots encircling the central aperture, where the modulating member is configured to be rotated about the central aperture for positioning a portion of the first tapered arcuate slot over the first valve port opening and a portion of the second tapered arcuate slot over the second valve port opening, wherein rotation of the modulating member adjustably positions a wider or narrower portion of both the first tapered arcuate slot and second tapered arcuate slot over the first valve port opening and second valve port opening respectively, to adjustably vary the rate of fluid flow through the first valve port opening and second valve port opening, such that fluid flows from the inlet through the first valve port opening and first tapered arcuate slot extending completely through the modulating member into a portion of the valve chamber that is above the modulating member, and out through the second tapered arcuate slot extending completely through the modulating member and second valve pod opening to the outlet; and a biasing spring for biasing the modulating member against the first valve port opening and the second valve pod opening, where the spring is coupled to the modulating member such that the spring and the modulating member rotate together.