Hydraulic coupling elements with pressure-relieving poppet valve

摘要

A female hydraulic coupling member (120, 320) comprising: a generally cylindrical body (121, 321) having a central axial bore (132, 332), a receiving chamber (134, 334) at a first end of the central axial bore (132 , 332) configured to receive the probe element (324) of a corresponding male hydraulic coupling element (322), fluid communication means at an opposite second end of the axial central bore (132, 332) configured to connect the hydraulic coupling element (120, 320) to a hydraulic fluid line, and a pressure relieving poppet valve (170, 270, 370, 470) within the axial central bore (132, 332) between the first end and the second end thereof, comprising: a poppet valve housing (171, 271, 371, 471), which has a first, sealing section in the shape of a truncated cone and a second, generally cylindrical section, adjacent to the first Section, has an axial central cavity (172, 282, 372, 472) in the poppet valve housing (171, 271, 371, 471) which is substantially closed at a first end thereof and open at an opposite second end, a pressure relief valve ( 180, 380) within that portion of the axial central cavity (172, 282, 372, 472) located in the second, generally cylindrical portion of the poppet valve housing (171, 271, 371, 471).