Apparatus for adjusting the stroke length of a pump element
Apparatus for changing belts
Apparatus for controlling operation of fluid pressure raising sy
Control apparatus and method for an oil-well pump assembly
Control apparatus for hybrid compressor
Control system for hydraulic drive
Electric motor driven pump with an automatic transmission
Electronic pressure control
Fuel supply apparatus
Hydraulic control system and method
Hydraulic transmission pump assembly having a differential...
Hydrodynamic pump units and regulators therefor
Method and apparatus for process control of vertical movement of
Oil well pump drive
Portable bulk transfer pump with variable speed transmission
Pressure switch and circuit means
Process and circuit arrangement for controlling a consumer drive
Pump torque control system
Swash plate type compressor with a malfunction detector
Variable capacity compressor