Patent ID: 8684035

Claim:
A quick connect coupling ( 100 ) for connecting hydraulic lines and interchangeable attachments and tools thereof, which quick connect coupling ( 100 ) comprises: a first and second connecting part ( 100 a , 100 b ), which can be releasably coupled along a coupling axis (A) for the transfer of a hydraulic fluid, wherein in a coupled state the hydraulic fluid to be transferred emerges from one connecting part ( 100 a and 100 b ) at an angle to the coupling axis (A) and enters the other connecting part ( 100 b and 100 a ) at an angle to the coupling axis (A); wherein in the first connecting part ( 100 a ), a first space ( 137 ) for the hydraulic fluid is provided, which first space extends in the direction of the coupling axis (A) and communicates at one end with a connecting line ( 101 ) of the first connecting part ( 100 a ), and in the second connecting part ( 100 b ), a second space ( 139 ) for the hydraulic fluid is provided, which second space extends in the direction of the coupling axis (A) and communicates at one end with a connecting line ( 131 ) of the second connecting part ( 100 b ), the first space ( 137 ) closeable at the other end by a first closing mechanism ( 106 , 110 , 118 ), which seals off the first space ( 137 ) in a decoupled state and opens it in the coupled state, the second space ( 139 ) closeable at the other end by a second closing mechanism ( 119 , 127 , 129 ), which seals off the second space ( 139 ) in the decoupled state and opens it in the coupled state, and both of the spaces ( 137 , 139 ) and closing mechanisms ( 106 , 110 , 118 and 119 , 127 , 129 ) are configured such that in the coupled state the hydraulic fluid flows between the two spaces ( 137 , 139 ) substantially in a radial direction, and the second closing mechanism including a valve, wherein upon decoupling the first and second connecting part, which forms a vacuum in the space behind the second closing mechanism, the valve opens and a small quantity of oil which collects on end faces of the first closing mechanism and the second closing mechanism during decoupling can be sucked off through the valve, said quick connect coupling ( 100 ) providing only a single line connection.