Socket and plug attachment mechanism for tube joint
AssigneeSMC Corporation
InventorsYoshimoto Taneya, Keiichirou Naito
Life of this patent
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Abstract
An O-ring is disposed on a front end surface of an abutted collar to prevent a fluid from leaking out of a flow passage when a socket and a plug of a tube joint is coupled to one another. A check valve of each of the socket and the plug, which prevents an outflow of the fluid when the socket and the plug are disengaged from each other, comprises the cylindrical collar (plug body) and a valve element. The valve element is disposed toward an inner diameter of the collar. The valve element has an O-ring disposed on the outer circumference of a columnar section coaxial with the collar.
Claims8
A tube joint for a fluid, comprising a socket and a plug which is connected to and disengaged from said socket, wherein said socket comprises:
- an outflow-preventive valve for closing a passage for said fluid with a cylindrical valve body which is coaxial with said socket and a valve element which is disposed in said valve body when said socket and said plug are disengaged from each other, said valve body being displaceable with respect to said socket,
- wherein a first seal is provided for sealing said socket and said plug before said valve body and said valve element are relatively moved when said socket and said plug are connected with each other, and
- wherein said valve body of said socket comprises an inner circumferential surface and a tapered surface having a gradually increasing diameter in a direction away from said inner circumferential surface, and wherein said first seal is disposed on one of an inner circumferential annular groove formed in said inner circumferential surface and an outer circumferential annular groove formed on a valve body of said plug.
Dependencies are inferred from the claim text.