Patent ID: 8807525
Filing Date: 2014-08-19
Classification: F16L,F25B,Y10T

Abstract:
1. A quick-release coupling, comprising: a socket comprising a socket body defining an opposing front end and rear end in communication with each other, a connection port defining therein a first passage in communication with an internal space of said socket body; a locking member mounted around said front end of said socket body of said socket and configured to releasably engage with a mating connector; an air valve control device comprising a plug mounted at the rear end of said socket body for fluidically sealing the rear end of the socket body, a grip coupled to said plug, and a pusher pin axially movably inserted through said plug within the internal space of said socket body and movable axially by said grip relative to said plug and said socket body, said pusher pin comprising a front tip disposed in the front end of said socket body, a neck disposed in said socket body adjacent to the rear end of said socket body and a collar connected between said front tip and said neck, the collar having a diameter greater than a diameter of the neck; and a leak-proof device comprising a stopper axially movably mounted inside the front end of said socket body and having an opposing front push end and rear stop end and a second passage axially extending through said front push end and said rear stop end, at least a portion of said pusher pin received in said second passage, a second spring member disposed between said stopper and said plug, said stopper being axially movable relative to said socket body between a first position where said rear stop end is forced into direct sealing engagement with a periphery of said collar of said pusher pin to fluidly block said first passage from said second passage and a second position where said rear stop end is spaced around said neck and sealingly disengaged from said collar to fluidly connect said first passage and said second passage; wherein said leak-proof device further comprises a first gasket ring mounted around said front push end of said stopper, and a second gasket ring mounted in said rear stop end of said stopper.