Patent ID: 7182539

Claim:
A sliding piston opening means comprising: a length of tube with one or more openings through part of the length; and a sliding piston with a sealing diameter approximately that of the inside diameter of the length of tube disposed within said length of tube and movable from a first closed position to a second open position at the one or more openings in the length of tube; wherein the sliding piston opening means is affixed inside a compressible elongated tubular housing with a sealed end and an open end and with approximately the same inside diameter as the outside diameter of the length of tube and wherein a fluid is enclosed within the compressible elongated tubular housing near the sealed end separated from the open end of the compressible elongated tubular housing by said sliding piston opening means thereby sealing the fluid within the compressible elongated tubular housing whereby the sliding piston opening means is operated by squeezing the compressible elongated tubular housing at or near the sliding piston to open and close a fluid path from the fluid to the open end of the compressible elongated tubular housing.