| 摘要 |
<p>1495395 Pipe connector A J M KAGAN 10 Dec 1974 [21 Dec 1973] 53440/74 Heading F2G A pipe connector of the type allowing ready coupling between an outlet duct and pressurized fluid source, is characterized in that a first member connectible to the source is provided with an auxiliary together with a main valve, whereby, when a second connecting member is brought into connecting relationship with the source member, the auxiliary valve opens initially to reduce the pressure thrust on the main valve and so facilitate the subsequent opening-by further contact of the second member, of the main valve. As shown, a valve stem 22 carries a seal 24 closable against a seating 23 formed in a concentric member 13 which carries a second seal 16 closable against a seating 17 to form a main valve. In operation a second connecting member 20 having a central portion 39 and outer annular portion 40 is thrust axially into contact with the first member, contact initially taking place between the central portion 39 of the second member and the end 22a of the valve stem to open the auxiliary valve and permit initial restricted fluid flow. This initial flow is effective in reducing the pressure difference across the main valve and so facilitates its opening upon further axial movement of the second member to bring outer annular portion 40 in contact with main valve body 13. Locking between the connecting members is effected as shown with balls 34 engaging annular recess 36 in the second member; ring 33 being movable axially against spring 35 to permit radial movement of the balls and release of the second member.</p> |
