Four-Valve High Pressure Pump

Abstract

A four-valve high pressure pump having a drive and a pump part with a piston capable of moving in a cylinder. Two cylinder blocks are arranged on the ends of the cylinder, through which blocks a transition duct runs. The inlet for the medium to be pumped is provided on an inlet casing part. A medium duct communicating with the inlet extends through the inlet casing part, in which duct a non-return valve is arranged either side of the opening for the inlet and which communicates at each opposing end with a transition duct of a cylinder block. An outlet casing part is constructed in a similar fashion, with an outlet for the medium instead of the inlet. The inlet casing part and/or the outlet casing part is detachably fastened laterally on the cylinder blocks at the side in such a manner that it can be removed without further dismantling the pump part.

1 . A four-valve high pressure pump comprising:
 a) a drive;   b) a pump part which in turn comprises:
 ba) a cylinder; 
 bb) two cylinder blocks, which are arranged on the end faces of the cylinder and through which a respective transition channel extends, which opens at opposing ends into an outer surface of the cylinder block and communicates in the central region with the interior of the cylinder; 
   c) an inlet housing part, which has   ca) a media channel which communicates with the inlet and in which a respective non-return valve is arranged on both sides of the opening point of the inlet which and communicates at its opposing ends with a respective transition channel of a cylinder block;   d) an outlet housing part, which has:
 da) an outlet for the medium to be pumped: 
 db) a media channel which communicates with the outlet and in which a respective non-return valve is arranged on both sides of the opening point of the outlet and which communicates at its opposing ends with a respective transition channel of a cylinder block; 
   e) a piston which is movable back and forth in the cylinder and is in driving communication with the drive;   wherein   f) the inlet housing part and/or the outlet housing part is releasably fastened laterally on the cylinder blocks in such a way that it can be removed without further dismantling the pump part.   
     
     
         2 . A four-valve high pressure pump according to  claim 1 , wherein the inlet housing part and/or the outlet housing part is pivotable about an axis extending perpendicularly to the axis of the cylinder after part of the fastening means has been released. 
     
     
         3 . A four-valve high pressure pump according to  claim 1 , wherein the media channel of the inlet housing part and/or the media channel of the outlet housing part has at least one opening which reaches as far as an outer surface and can be closed by a plug.