| 摘要 |
PCT No. PCT/HU82/00037 Sec. 371 Date Apr. 4, 1983 Sec. 102(e) Date Apr. 4, 1983 PCT Filed Aug. 4, 1982 PCT Pub. No. WO83/00540 PCT Pub. Date Feb. 17, 1983.The invention relates to a pneumatically controlled pressure transducer for operating hydraulic work tools having a dual operating cylinder, on one side of which a pneumatically operable piston, on the other side a hydraulically operable piston is provided and, to the hydraulic side of which a hydraulically operable working tool can be joined. The essence of the invention resides in that a control valve is provided which is coupled with the primary space located in front of the piston of the pneumatically operable cylinder of the operating cylinder and, which is connected into an operating relationship with a starting valve, and wherein the control valve is connected over a throttle-check valve to a further valve on one side, while on the other side, over a quick exhaust valve, is connected with a hydraulic container, respectively, over a valve with the secondary space of the pneumatically operable cylinder. A further essential characteristic resides in that the control valve is coupled over the throttle-check valve of the hydraulic container with the hydraulic cylinder of the dual operating cylinder in a fashion which can be closed with the hydraulic piston. Between the valve and the cylinder, there is a conduit which is coupled over a further throttle-check valve with the control valve into an operating relationship. The pressure transducer according to the invention represents a relatively inexpensive apparatus having a uniformly simple construction with the help of which various hydraulic work tools can be operated in a manner determined by the operating tool itself and the object to be solved thereby. |
