| 摘要 |
Hydraulic coupling of the quick-connective type which comprises two coupling parts each with a built-in check-valve. In this type of couplings, a certain undesired oil leakage always occurs when the coupling is being disjointed. The present invention has the object to eliminate this oil leakage. It is proposed to provide a means (15) on one coupling half which is coupled-together state of the coupling sealingly encloses portions (24) of the coupling halves facing toward each other and encloses leaked hydraulic medium, and which when the coupling halves are being disjointed from each other follows along with one of them and forms between said portions (24) a space (36) increasing in volume in order to transfer enclosed hydraulic medium to a space (37) located behind said means before one of the coupling halves has been removed from said means, and in which space (37) the hydraulic medium remains until the coupling again is coupled together in order thereby to be transferred by the means (15) to the space (36) enclosed by said means between the portions (24) of the coupling halves facing toward each other. |
