142736 ⎘
Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air using a source of partial vacuum or sub-atmospheric pressure the return stroke being obtained by an elastic fluid under pressure
Reciprocating fluid pump including at least one magnet on a spool of a shuttle valve
#2Self-lubricating pump throat seal
#3Air operated pump
#4Pump arrangement with two pump units, system, use and method
#5TWO-STAGE AIR POWERED PUMP