Oscillating piston pump

Abstract

Pump ( 1 ), suitable for use as a vacuum pump or compressor, has at least one pump piston ( 2, 3 ) moving on a circular path, and a pump housing ( 18 ), wherein the pump piston ( 2, 3 ) is optionally coupled in a rigid manner to one or more further pump pistons ( 2, 3 ), moving in an oscillating manner about an axis of rotation ( 5 ) on a path of movement correspondingly having two reversal positions. A medium, optionally compressed or pressurized, is discharged via an outlet valve ( 8 ). In the course of movement from one reversal position into the other reversal position, an inlet valve ( 9 ) being opened; after which, in the course of a pressure buildup, the medium is discharged on a pressure side of the pump piston ( 2, 3 ) and taken in on a suction side of the pump piston ( 2, 3 ).

1 - 36 . (canceled)  
   
   
       37 . Pump ( 1 ), suitable for use as a vacuum pump or compressor, comprising: at least one pump piston ( 2 ,  3 ) moving on a circular path, and a pump housing ( 18 ), the pump piston ( 2 ,  3 ), optionally coupled in a rigid manner to one or more further pump pistons ( 2 ,  3 ), moving in an oscillating manner about an axis of rotation ( 5 ) on a path of movement correspondingly having two reversal positions; and furthermore a medium, optionally compressed or pressurized, being discharged via an outlet valve ( 8 ) and, in the course of movement from one reversal position into the other reversal position, an inlet valve ( 9 ) being opened; after which, in the course of a pressure buildup, the medium is discharged on a pressure side of the pump piston ( 2 ,  3 ) then obtained and taken in on a suction side of the pump piston ( 2 ,  3 ) then obtained.  
   
   
       38 . Pump according to  claim 37 , wherein the inlet valve ( 9 ) is run over in the movement from one reversal position into the other reversal position.  
   
   
       39 . Pump according to  claim 37 , wherein a pump chamber is formed radially on the inside by an inner wall formed rotationally fixed with respect to the pump piston.  
   
   
       40 . Pump according to  claim 39 , wherein a housing outer wall bounding the pump chamber radially on the outside is formed in a fixed manner.  
   
   
       41 . Pump according to  claim 39 , wherein a housing outer wall bounding the pump chamber radially on the outside is movable.  
   
   
       42 . Pump according to  claim 39 , wherein the inlet valve ( 9 ) is formed in at least one of the pump chamber floor and/or in the pump chamber ceiling and/or in the housing outer wall and/or in the housing dividing wall.  
   
   
       43 . Pump according to  claim 39 , wherein the pump chamber is bounded in the direction of movement of the pump piston ( 2 ,  3 ) by a fixed housing dividing wall.  
   
   
       44 . Pump according to  claim 37 , wherein the outlet valve ( 8 ) is formed as a check valve.  
   
   
       45 . Pump according to  claim 39 , wherein the outlet valve ( 8 ) is formed in at least one of the housing dividing wall and/or in the pump chamber floor and/or in the pump chamber ceiling and/or in the housing outer wall.  
   
   
       46 . Pump according to  claim 37 , wherein the pump is driven by an electric motor.  
   
   
       47 . Pump according to  claim 37 , wherein the pump is driven by a stepping motor.  
   
   
       48 . Pump according to  claim 37 , wherein the pump is driven by an electromagnetic oscillating part.  
   
   
       49 . Pump according to  claim 37 , wherein a drive is performed by means of a crankshaft.  
   
   
       50 . Pump according to  claim 37 , wherein the drive acts on two or more pumps linked by means of the same crankshaft.  
   
   
       51 . Pump according to  claim 50 , wherein, in the case of two pumps ( 1 ) driven by means of the same crankshaft, they move in opposite directions.  
   
   
       52 . Pump according to  claim 37 , wherein the inlet valve ( 9 ) and the outlet valve ( 8 ) are associated with the same end region of the path of movement.  
   
   
       53 . Pump according to  claim 37 , wherein the inlet valve ( 9 ) and the outlet valve ( 8 ) are disposed in the same housing dividing wall ( 6 ,  7 ).  
   
   
       54 . Pump according to  claim 37 , wherein the inlet valve ( 9 ) and/or the outlet valve ( 8 ) is formed from a punched or bent sheet-metal part, with a closure plate ( 27 ) associated with a valve opening ( 21 ,  22 ) and an adjoining bending-out portion ( 28 ).  
   
   
       55 . Pump according to  claim 54 , wherein the closure plate merges with a bending-out portion ( 28 ) with the same diameter.  
   
   
       56 . Pump according to  claim 54 , wherein the inlet valve ( 9 ) and/or the outlet valve ( 8 ) have closure plates ( 27 ) and bending-out portions ( 28 ) merging with each other in a coplanar manner.  
   
   
       57 . Pump according to  claim 37 , wherein an inlet valve ( 9 ) and/or an outlet valve ( 8 ) has a mounting foot ( 29 ), which is mounted in a clamping manner.  
   
   
       58 . Pump according to  claim 57 , wherein the mounting foot ( 29 ) merges with a bending-out portion ( 28 ) in a coplanar manner.  
   
   
       59 . Pump according to  claim 54 , wherein the closure plate ( 27 ) rests on a support ( 31 ), which is mounted in a clamping manner between the valve and the associated housing part.  
   
   
       60 . Pump according to  claim 59 , wherein the mounting in a clamping manner is achieved by means of a clamping part ( 37 ).  
   
   
       61 . Pump according to  claim 59 , wherein the mounting in a clamping manner is achieved by means of a pressure part ( 35 ).  
   
   
       62 . Pump according to  claim 37 , wherein a longitudinal extent of the inlet valve ( 9 ) and/or of the outlet valve ( 8 ) runs parallel to the axis of rotation ( 5 ) of the pump pistons ( 2 ,  3 ).  
   
   
       63 . Pump according to  claim 37 , wherein a number of outlet valves ( 8 ) are disposed next to one another parallel to the direction of rotation ( 5 ).  
   
   
       64 . Pump according to  claim 37 , wherein the pump piston ( 2 ,  3 ) has associated with the outlet valve ( 8 ) an opening projection ( 40 ), for the triggering of the outlet valve ( 8 ).  
   
   
       65 . Pump according to  claim 37 , wherein an opening projection, protruding toward a corresponding end face of the pump piston ( 2 ,  3 ), is formed as a push rod.  
   
   
       66 . Pump according to  claim 37 , wherein a pump ( 1 ) has four—or a higher multiple of two—pump pistons ( 2 ,  3 ), of which two or more respectively move on a common circular path.  
   
   
       67 . Pump according to  claim 37 , wherein two pump pistons ( 2 ,  3 ) moving on a common circular path are respectively disposed in a separate pump housing ( 18 ).  
   
   
       68 . Pump according to  claim 37 , wherein a common drive is provided for the four pump pistons ( 2 ,  3 ), and in that the drive is disposed in a drive housing ( 44 ) separate from the pump housing ( 18 ).  
   
   
       69 . Pump according to  claim 68 , wherein the drive housing ( 44 ) is disposed between the pump housings ( 18 ).  
   
   
       70 . Pump according to  claim 37 , wherein in the case of a number of pump housings ( 18 ), the pump housings ( 18 ) are identically formed such that they can be exchanged for each other.  
   
   
       71 . Pump according to  claim 37 , wherein the pump piston ( 2 ,  3 ) and/or the pump housing ( 18 ) is coated in the surface area of an associated movement gap.  
   
   
       72 . Pump according to  claim 71 , wherein the coating is a flocking.