Patent ID: 7261276

Claim:
An apparatus comprising: a housing which directs a flow of pressurized fluid from an inlet to an outlet, the housing supporting an interior stationary surface; an interior moveable surface configured to selectively impede said flow, the moveable surface disposed in facing relation to the stationary surface to from a leakage path therebetween; and a sealing member disposed in a medial portion of the leakage path so that a leakage portion of the flow passing along said path divides into a first portion that engages a first side of the sealing member and a second portion that engages a second side of the sealing member to form a force vector therebetween that compresses the sealing member against a shoulder portion to urge the sealing member across said path, wherein said compression against the shoulder portion inhibits a sheering passage of the first and second portions beyond the sealing member; wherein the sealing member has a substantially rectangular cross-sectional shape with respective first, second, third and fourth outwardly facing surfaces that respectively contactingly engage corresponding first, second, third and fourth inwardly directed surfaces, wherein the first portion passes along a junction between the first inwardly and first outwardly directed surfaces, wherein the second portion passes along a junction between the second inwardly and second outwardly directed surfaces, and wherein the force vector jams the third outwardly directed surface against the third inwardly directed surface and the fourth outwardly directed surface against the fourth inwardly directed surface thereby preventing further downstream flow along a fluidic path that extends from the third and fourth inwardly directed surfaces in a direction away from the sealing member to an exterior of the housing.