Coupling for pressure gas lines

Claim 1

A coupling for a pressure gas line, comprising a sleeve-like first means intended to receive gas under pressure at one end thereof and including spring-loaded valve means for normally closing off said one end with respect to a bore leading to the other end of said first means, a tubularly shaped second means for conducting-on the gas under pressure, said tubularly shaped second means being provided with an annular groove, and further means for detachably connecting said first and second means with each other by inserting said tubularly shaped second means into the bore of said sleeve-like first means while at the same time opening said valve means to thereby establish a through-flow path for gas under pressure from the one end of the sleeve-like first means by way of the now-opened valve means into the interior of said tubularly shaped second means, said further means including a latching means operable to engage in the annular groove provided in said second means, said latching means being formed by a plate-like member operable to be guided in a cut-out provided in the part of said sleeve-like first means containing said bore and extending from the outside of said part to said bore substantially transversely to the axis of the coupling, a ring-like member rotatable on said part of the sleeve-like first means and having an inwardly projecting actuating means for engagement with said plate-like member to displace the same upon rotation of said ring-like member in its disengaging direction, and a spring between said ring-like member and said plate-like member for urging the plate-like member into its engaging position, characterized in that said part of the sleeve-like first means has a reduced diametric dimension relative to the diametric dimension of the section of the sleeve-like first means containing said valve means, and in that said plate-like member has a first substantially flat main portion in engagement with said spring and operable to engage in said annular groove and a second shorter leg portion bent at such obtuse angle to said flat main portion as to extend generally in the direction toward said inwardly projecting actuating means whereby the external diametric dimension of said ring-like member can be kept relatively small.