Propulsive device

Protective control system for diffusion pump

Pulsating ejector refrigeration system

Pulse jet engine having an acoustically enhanced ejector system

Pump and combination pump and trap with snap-over mechanism and

Pump and combination pump and trap with snap-over mechanism and

Pump and combination pump and trap with snap-over mechanism...

Pump and valve for leachate extraction of heavier than water flu

Pump apparatus

Pump arrangement for pumping liquid by means of compressed air

Pump for hot corrosive melts

Pump for molten metal or other fluid

Pump improvement

Pump system for biasing seals of a centrifugal pump

Pump system using a vacuum chamber and mechanical pump combinati

Pump system with vacuum source

Pump trap assembly having multiple pivot axes

Pump with improved priming

Pump with internal valve between suction and pressure regions

Pump-ejector compression unit and variants