Scroll-type two stage positive fluid-displacement apparatus with
Seal assemblies
Self lubricating vane for a rotary vane cooling system
Series for gear pumps with differing capacities and method...
Sliding segment rotary fluid power translation device
Sliding vane type of compressor-expander having differential ecc
Sperial vacuum pump having a metal bellows for limiting circular
Stackable rotary vane pump with improved volumetric efficiency