Patent ID: 9512948
Filing Date: 2016-12-06
CPC Classification: F16L,Y10T

Claim Text:
1. A coaxial high-pressure coupling for hoses or pipelines with a plug part and with a receptacle part that accommodates the plug part in a coupled state, wherein the plug part and the receptacle part each have a valve body with an inner channel and an outer channel arranged concentric thereto, wherein the inner channels and the outer channels of the plug part and of the receptacle part are connected to one another in the coupled state, wherein a closing cone is movable in the inner channel of the valve body of the plug part and a closing sleeve is movable in the outer channel of the plug part against a respective force of a spring, and wherein the closing cone and the closing sleeve are respectively displaceable into their open position by the receptacle part during a coupling process, wherein a valve bore, which is connected to the inner channel at one end and connected to atmosphere at the other end, has a valve piston displaceably arranged therein, the valve piston being arranged in the interior of the closing cone that can be moved in the inner channel formed by an inner pipe, and wherein the valve piston is prestressed into a blocking position, in which the valve piston blocks the connection between the valve bore and the inner channel, by a force of a spring and can be displaced into a leakage position by an overpressure in the inner channel that acts against the spring.