Patent ID: 6880804
Filing Date: 2005-04-19
Classification: F16K,Y10T

Abstract:
1. A valve comprising: a seat located in a passageway between a fluid inlet and a fluid outlet; a spherical sealing member adapted to seal against the fluid inlet side of the seat; and a plunger for moving the sealing member off the seat, said plunger being reciprocally moveable by rotation such that between about one quarter and one half a turn is required to fully unseat the spherical sealing member and thereby enable full fluid flow through the valve; wherein the plunger is adapted to project through the seat from the outlet side of the seat and includes a cylindrical configuration with a tapered end portion which can project through the seat when the plunger is rotated about its axis; and wherein the plunger is arranged for longitudinal movement within a housing, said plunger including a detent which slots into a groove formed in the wall of the housing to regulate the longitudinal movement of the plunger when it is rotated.