Patent ID: 7044443
Filing Date: 2006-05-16
Classification: F16K,Y10T

Abstract:
1. A flat valve device comprising: a nearly ring-shaped circular frame member to be mounted on the opening of a gas-containing structure filled with the gas therein; and a round body member to be mounted on the inner peripheral surface of the circular frame member; and a valve provided inside the round body member, said circular frame member having a female thread part for cover rotation to removably secure said round body member to the inner peripheral surface thereof, said round body member having a male thread part for cover rotation to be screwed to said female thread part for cover rotation on the outer peripheral surface thereof, and having a valve accommodating space therein to accommodate said valve, from which an outward-facing through hole and an inward-facing through hole are provided so as to pass through said gas-containing structure outwardly and inwardly, respectively, said valve having a sealing cover to be inserted into said outward-facing through hole for maintaining an airproof state, and an energizing member which normally energizes the sealing cover toward said outward-facing through hole, said round body member having a circular recess facing the surface with the outward-facing through hole, and a rotating cover to be pressed onto the bottom surface of said circular recess by rotation, said outward-facing through hole being prepared off the center of said circular recess, said rotating cover having a gas injection hole for gas injection so as to have the degree of eccentricity identical to that of said outward-facing through hole.