Multi-cylinder pumps characterised by number or arrangement of cylinders

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

F04B27/00Multi-cylinder pumps characterised by number or arrangement of cylinders

F04B27/005with two cylinders F04B27/02having cylinders arranged oppositely relative to main shaft F04B27/04having cylinders in star- or fan-arrangement F04B27/0404Details, component parts specially adapted for such pumps F04B27/0409Pistons F04B27/0414Cams F04B27/0418consisting of several cylindrical elements F04B27/0423Cylinders F04B27/0428Arrangements for pressing or connecting the pistons against the actuated cam F04B27/0432hydraulically F04B27/0437Disconnecting the pistons from the actuated cam F04B27/0442Supporting and guiding means for the pistons F04B27/0446Draining of the engine housing; Arrangements dealing with leakage fluid F04B27/0451Particularities relating to the distribution members F04B27/0456to cylindrical distribution members F04B27/046to conical distribution members F04B27/0465to plate like distribution members F04B27/047with an actuating element at the outer ends of the cylinders F04B27/0472with cam-actuated distribution members F04B27/0474with two or more series radial piston-cylinder units F04B27/0476directly located side-by-side F04B27/0478Coupling of several cylinder-barrels F04B27/053with an actuating element at the inner ends of the cylinders F04B27/0531with cam-actuated distribution members F04B27/0533each machine piston being provided with channels, which are coacting with the cylinder and are used as a distribution member for another piston-cylinder unit F04B27/0535the piston-driving cam being provided with an inlet or an outlet F04B27/0536with two or more series radial piston-cylinder units F04B27/0538directly located side-by-side F04B27/06the cylinders being movable F04B27/0606having cylinders in star- or fan-arrangement, the connection of the pistons with an actuating element being at the outer ends of the cylinders F04B27/0612rotary cylinder block F04B27/0619cylinder block and actuating cam rotating together F04B27/0625with two or more series radial piston cylinder units F04B27/0631cylinder block and actuating cam both rotating F04B27/0638directly located side by side F04B27/0644cylinder block and actuating cam both rotating F04B27/065having cylinders in star- or fan-arrangement, the connection of the pistons with an actuating element being at the inner ends of the cylinders F04B27/0657rotary cylinder block F04B27/0663the rotary cylinder being provided with only one piston, reciprocating within this cylinder F04B27/067Control F04B27/0673by using a valve in a system with several pumping chambers, wherein the flow-path through the chambers can be changed F04B27/0676by changing the phase relationship between the actuating cam and the distribution means F04B27/073by varying the relative eccentricity between two members F04B27/08having cylinders coaxial with, or parallel or inclined to, main shaft axis F04B27/0804having rotary cylinder block F04B27/0808having two or more sets of cylinders or pistons F04B27/0813inclined to main shaft axis F04B27/0817arrangements for pressing the cylinder barrel against the valve plate F04B27/0821component parts, details F04B27/0826particularities in the contacting area between cylinder barrel and valve plate F04B27/083bearing means F04B27/0834cylinder barrel F04B27/0839valve means F04B27/0843cylindrical valve means F04B27/0847conical valve means F04B27/0852machine housing F04B27/0856cylinder barrel bearing means F04B27/086swash plate F04B27/0865swash plate bearing means or driving axis bearing means F04B27/0869connection between rotating cylinder barrel and rotating inclined swash plate F04B27/0873Component parts F04B27/0878Pistons F04B27/0882piston shoe retaining means F04B27/0886Piston shoes F04B27/0891casings, housings F04B27/0895driving means F04B27/10having stationary cylinders F04B27/1009Distribution members F04B27/1018Cylindrical distribution members F04B27/1027Conical distribution members F04B27/1036Component parts, details F04B27/1045Cylinders F04B27/1054Actuating elements F04B27/1063Actuating-element bearing means or driving-axis bearing means F04B27/1072Pivot mechanisms F04B27/1081Casings, housings F04B27/109Lubrication F04B27/12having plural sets of cylinders or pistons F04B27/14Control F04B27/16of pumps with stationary cylinders F04B27/18by varying the relative positions of a swash plate and a cylinder block F04B27/1804Controlled by crankcase pressure F04B27/20of pumps with rotary cylinder block F04B27/22by varying the relative positions of a swash plate and a cylinder block F04B27/24Control not provided for in a single group of groups F04B27/02 - F04B27/22