Downhole roller vane motor

Dry-running twin-shaft vacuum pump

Dual revolving vane meter-motor-pump

Eccentric screw pump for the conveying of liquids from bore hole

Eccentric screw pump with reversible rotor

Filling, fluid-transporting, and pumping device

Gas supplying device for vacuum pump

Gear pump with improved pinion mounting

Gear pump with means for dispersing gas into liquid

Gear pump-liquid gas mixer with improved gas introduction

Gerotor vacuum pump

Helical blade type compressor having a helical blade in a...

High displacement rate, scroll-type, fluid handling apparatus

High displacement rate,scroll-type, fluid handling apparatus

High efficiency scroll type compressor with wrap portions having

High ratio recirculating gas compressor

Horizontal two stage rotary compressor with a bearing-driven...

Horizontal type compressor and automobile air conditioner...

Internal axis rotary piston machine

Light gas vacuum pumping system