The article discusses the choice of power and type drive motor for system controlling vibration amplitude rectifier rocker arms continuously variable mechanical transmission, intended use on a vehicle. Formulas calculating required torque rotational speed with planetary differential control gear are given. It is shown that an electrohydraulic provides operation system. results testing presented.

Clearance of a difficult biliary stone can be obtained using various interventional techniques such as endoscopic sphincterotomy followed by papillary large balloon dilation, mechanical lithotripsy, peroral cholangioscopy-assisted intraductal electrohydraulic/laser temporary plastic stent insertion, percutaneous transhepatic cholangioscopy-guided and extracorporeal shock wave lithotripsy. We he...

From Sep. 1984 to Aug. 1990,99 patients were treated for ureteral stone using the urekroscope. In five patients ureteroscopy was repeated for a second stone. In one patient the procedure was diagnostic in nature and in the rest of the patients it had a curative value. In 60 patients the stone was removed by electrohydraulic and basket combination and in25 cases, dilatation alone was enough...

A nonlinear dynamic model for an unconventional, commercially available electrohydraulic flow control servovalve is presented. The valve is a two-stage valve and differs from the conventional servovalve in that it does not require a feedback wire and ball, and the boost stage uses two spools, instead of a single spool, to meter flow into and out of the valve separately. Consequently, the valve ...