| 摘要 |
<p>A fluid handling device which operates as a combination check valve and fluid flow meter. The fluid handling device comprises a housing (10) having an inlet (22), an outlet (28), and a fluid passageway formed therebetween. A valve seat (26) is contained within the housing in series with the fluid passageway while a valve member (40) cooperates with the valve seat and is movable between an open and a closed position. A compression spring (50) urges the valve member towards its closed position so that whenever the fluid pressure at the outlet exceeds the fluid pressure at the inlets, the valve moves to its closed position thus preventing reverse fluid flow through the device. Preferably, a tapered surface (56) on the valve member forms a variable area opening at the valve seat which increases in area as the valve member moves from its closed and towards its open position. An indicator needle (86) is mechanically connected to the valve member to produce an exteriorly visible signal of the position of the valve member which, in turn, is representative of the fluid flow rate through the fluid handling device.</p> |
