Patent ID: 6672337
Filing Date: 2004-01-06
Classification: F16L,Y10T

Abstract:
An in-line type fluid hammer prevention device comprising an inlet cylindrical connecting body and an outlet connecting body connected at an intermediate position of piping system in series in order to form a cylindrical space between said inlet cylindrical connecting body and said outlet connecting body, wherein:said inlet cylindrical connecting body and said outlet connecting body respectively forming a recessed seat facing to each other, each of said recessed seats being provided with a center through-hole at the center position connecting to a fluid channel inside said pipe; end parts of a cylindrical shape sleeve being positioned at a space between said center through-holes of said inlet cylindrical connecting body and said outlet connecting body; a pair of protrusive flanges protrusively formed from said sleeve being positioned opposite to each other by respectively having a gap between said protrusive flanges and said recessed seats; a cylindrical diaphragm having an elastic characteristic being positioned at an outer periphery of said sleeve; a pair of inward lip portions formed inwardly protruding at each end of said cylindrical diaphragm being pressed and supported at said gaps by said recessed seats and said protrusive flanges; said sleeve having small holes on a wall of said sleeve, connecting a cylindrical chamber formed by said sleeve and an inner periphery of said cylindrical diaphragm and a passage hole inside said sleeve; and an elastic cushion being placed at a position inside said cylindrical space on the outer periphery of said cylindrical diaphragm.