Self sealing pipe coupling

摘要

1,004,887. Pipe couplings. NEW YORK AIR BRAKE CO. Oct. 8, 1963 [April 18, 1963], No. 39566/63. Heading F2G. Valve means in each half of two like coupling members 11, 111 comprise a valve head 25 spring loaded and slidable longitudinally on a thrust rod 24 fixed to a spider 23, a sleeve 17 surrounding the valve head, which sleeve is longitudinally movable in a body 13, and has a conical seating 22 sealingly engaging with a conical surface on the valve head 25, when the coupling is disconnected. The sleeve 17 contains a sealing ring 21 in the surface contacting the corresponding sleeve in the other coupling member. Operation.-In the disconnected state the outer surfaces of the sleeve 17, the valve head 25 and the thrust member 24 are coplanar. As the coupling halves are brought together a spring-loaded locking sleeve 15 on the members 11, 111 is pushed backwards as hooked prongs 14 on one coupling half engage projecting bosses 20 on the opposite sleeve 15. When the prongs are inserted camming surfaces of the hooks and bosses rotate the coupling and allow spring 16 to return the locking sleeve 15 so that the bosses 20 lock the coupling. Meanwhile the ends of the sleeves 17, 171 sealingly engage and cause each sleeve to retract and the fixed thrust rods engage the opposite valve heads to open the valves. When the coupling is completely made the sleeves 17, 171 will have moved half the distance that the valves have moved to open a flow path as shown. If fluid under pressure flows through the coupling the seal between sleeves 17, 171 is enhanced. Specification 961,819 is referred to.