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Coupling for connecting hydraulic line of e.g. sowing machine with tractor, has hydraulic chamber connected with hydraulic systems, so that fluid is returned back in direction of one system until hydraulic line is depressurized
Coupling for connecting hydraulic line of e.g. sowing machine with tractor, has hydraulic chamber connected with hydraulic systems, so that fluid is returned back in direction of one system until hydraulic line is depressurized
The coupling (10) has a plug part (20) connected to a first hydraulic system (100). A sleeve valve (41) is provided with a sleeve part (40) into which a connector system (120) with a closed system valve (121) of a hydraulic line (110) is inserted. The sleeve valve is provided with a valve element (42) operated in closed and open positions. An inner hydraulic chamber (16) is connected with the first hydraulic system and a second hydraulic system (200), so that a fluid is returned back in a direction of the second hydraulic system until the line of the first hydraulic system is depressurized. Independent claims are also included for the following: (1) a system for releasing a hydraulic line of a hydraulic system (2) a method for releasing a hydraulic line of a hydraulic system.
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