F04B9/137 - CPC Classification Index

ClassID:

142751 ⎘

F04B9/137 - CPC Classification

Classification description:

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 the pumping members not being mechanically connected to each other

Sub-classes:

F04B9/1372 » {the movement of each pump piston in the two directions is obtained by a double-acting piston fluid motor} 5
F04B9/1376 » {the movement of each piston in one direction being obtained by a single-acting piston fluid motor} 6

Recent Application in this class:

20180003170

2018-01-04

Pump arrangement and corresponding operating method

20170074254

2017-03-16

Vacuum-driven fluid delivery device with controlled vacuum pressure release

20170022983

2017-01-26

Air operated pump

20170009760

2017-01-12

Double diaphragm pump