Patent ID: 9664319
Date: 2017-05-30
CPC Classifications: F16K,F16L

Claim:
1. A coupling part for a quick-release coupling for a high-pressure hydraulic line comprising: a coupling housing having a through-flow channel, a valve device disposed within the through-flow channel, and a conical valve seat surface, said valve device having a tappet-shaped closing valve for closing off the through-flow channel in an uncoupled state of the coupling part; wherein the closing valve has a longitudinal valve axis and a valve head, said valve head having a conical surface and a valve sealing ring for sealing contact with the valve seat surface, wherein the valve sealing ring has a ring circumference surface that projects beyond the conical surface in a radial direction and has a valve seal diameter D wherein the flow-through channel has a ring-shaped cross-sectional widened region having a maximal expansion diameter D wherein the closing valve, viewed in a direction of the longitudinal valve axis, has a first, head-side valve end and a second valve end, and the valve device has a bearing sleeve at the second valve end, and wherein the closing valve is mounted by the bearing sleeve so as to slide and to be displaceable, back and forth, in the coupling housing, in an axial direction, and wherein the coupling part has a locking device for locking the closing valve in an open position, wherein the locking device has: a) spring clamp, having first and second spring arms, b) the bearing sleeve which is configured with c) a sliding sleeve that is mounted so as to be displaceable, back and forth, in a sliding sleeve guide groove of the valve stem, by a limited amount, in the axial direction, wherein d) the sliding sleeve and the valve stem are each mounted in the bearing recess so as to slide and be displaceable in the axial direction, e) the sliding sleeve, the spring clamp, and the sliding sleeve guide groove interact to lock the closing valve in an open position, and f) the guide body and the guide pipe are configured in one piece or in two pieces.