with two mechanically connected pumping members

Full Title

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 > having plural pumping chambers > with two mechanically connected pumping members

Child Classifications

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• F04B 9/1315
• F04B 9/133 reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor
• F04B 9/135 reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction