Piston machines or pumps characterised by the driving or driven means to or from their working members

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F04Liquid pumps F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS

F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members

F04B9/02the means being mechanical F04B9/025Driving of pistons coacting within one cylinder F04B9/04the means being cams, eccentrics, or pin-and-slot mechanisms F04B9/042the means being cams F04B9/045the means being eccentrics F04B9/047the means being pin-and-slot mechanisms F04B9/06the means including spring- or weight-loaded lost-motion devices F04B9/08the means being fluid F04B9/10the fluid being liquid F04B9/103having only one pumping chamber F04B9/1035the movement of the pump piston in the two directions being obtained by two single-acting liquid motors each acting in one direction F04B9/105reciprocating movement of the pumping member being obtained by a double-acting liquid motor F04B9/1053one side of the double-acting liquid motor being always under the influence of the liquid under pressure F04B9/1056with fluid-actuated inlet or outlet valve F04B9/107rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor F04B9/1073with actuation in the other direction by gravity F04B9/1076with fluid-actuated inlet or outlet valve F04B9/109having plural pumping chambers F04B9/1095having two or more pumping chambers in series F04B9/111with two mechanically connected pumping members F04B9/1115the movement of the pumping pistons in only one direction being obtained by a single-acting piston liquid motor F04B9/113reciprocating movement of the pumping members being obtained by a double-acting liquid motor F04B9/115reciprocating movement of the pumping members being obtained by two single-acting liquid motors, each acting in one direction F04B9/117the pumping members not being mechanically connected to each other F04B9/1172the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor F04B9/1174with fluid-actuated inlet or outlet valve F04B9/1176the movement of each piston in one direction being obtained by a single-acting piston liquid motor F04B9/1178the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders F04B9/12the fluid being elastic F04B9/1207using a source of partial vacuum or sub-atmospheric pressure F04B9/1215the return stroke being obtained by a spring F04B9/1222the return stroke being obtained by an elastic fluid under pressure F04B9/123having only one pumping chamber F04B9/1235the movement of the pump piston in the two directions being obtained by two single-acting piston fluid motors, each acting in one direction F04B9/125reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor F04B9/1253one side of the double-acting piston fluid motor being always under the influence of the fluid under pressure F04B9/1256with fluid-actuated inlet or outlet valve F04B9/127rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor F04B9/1273with actuation in the other direction by gravity F04B9/1276with fluid-actuated inlet or outlet valve F04B9/129having plural pumping chambers F04B9/1295having two or more pumping chambers in series F04B9/131with two mechanically connected pumping members F04B9/1315the movement of the pumping pistons in only one direction being obtained by a single-acting piston fluid motor F04B9/133reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor F04B9/135reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction F04B9/137the pumping members not being mechanically connected to each other F04B9/1372the movement of each pump piston in the two directions is obtained by a double-acting piston fluid motor F04B9/1374with fluid-actuated inlet or outlet valve F04B9/1376the movement of each piston in one direction being obtained by a single-acting piston fluid motor F04B9/1378the movement in the other direction being obtained by an hydraulic connection between the fluid motor cylinders F04B9/14Pumps characterised by muscle-power operation