HOSE CONNECTING MECHANISM FOR MULTICORE HYDRAULIC OR PNEUMATIC CABLE FOR HYDRAULIC TIMBERING SYSTEM PARTICULARLY IN MINE WORK

摘要

A hydraulic coupling comprises a coupling device and a connector. The coupling device has a casing which houses a plurality of plug pins. The plug pins are held in place in the casing by means of a retaining disc. The connector is provided with a plurality of bores which define sockets for receiving the plug pins. When the coupling device and the connector are connected together, the plug pins and the bores define fluid passageways through the coupling. One of these passageways is provided with a non-return valve for preventing fluid flow through that passageway when the connector is separated from the coupling device. The non-return valve is housed within one of the bores of the connector, and the coupling device is provided with a valve-opening member for opening the non-return valve when the connector is attached to the coupling device.