High pressure pump

Abstract

A high pressure pump including a pump body, a pump housing within which at least part of the pump body is located, a gallery defined between the pump body and the pump housing, the pump body having a pump outlet which communicates with the gallery, and the pump housing having an outlet port which communicates with the gallery, and a filler located within the gallery, the filler being located at least in the part of the gallery most remote from the pump outlet.

1 - 15 . (canceled) 
     
     
         16 . A high pressure pump comprising:
 a pump body;   a pump housing within which at least part of the pump body is located;   a gallery defined between the pump body and the pump housing, the pump body having a pump outlet which communicates with the gallery, and the pump housing having an outlet port which communicates with the gallery; and   a filler located within the gallery, the filler being located at least in the part of the gallery most remote from the pump outlet.   
     
     
         17 . The pump of  claim 16 , wherein the gallery is of annular form. 
     
     
         18 . The pump of  claim 17 , wherein the filler extends about at least half of the circumferential length of the gallery. 
     
     
         19 . The pump of  claim 18 , wherein the filler extends about at least three quarters of the gallery. 
     
     
         20 . The pump of  claim 16 , wherein a cross-sectional shape of the filler conforms with that of the gallery. 
     
     
         21 . The pump of  claim 16 , wherein the filler substantially fills at least part of the gallery furthest from the pump outlet. 
     
     
         22 . The pump of  claim 16 , wherein the filler is of an elastomeric material. 
     
     
         23 . The pump of  claim 16 , wherein the filler is of molded fluorocarbon form. 
     
     
         24 . The pump of  claim 16 , wherein the filler forms an interference fit in the gallery. 
     
     
         25 . The pump of  claim 16 , further comprising locator means to resist movement of the filler within the gallery. 
     
     
         26 . The pump of  claim 25 , wherein the locator means comprises locator pins provided in the gallery and arranged to abut ends of the filler to resist movement of the filler. 
     
     
         27 . The pump of  claim 16 , wherein the filler incorporates an integral projection configured to be received within a corresponding recess formed in the pump body and/or pump housing to resist movement of the filler. 
     
     
         28 . The pump of  claim 16 , wherein adjacent the gallery, the pump body and pump housing are sealed to one another. 
     
     
         29 . The pump of  claim 28 , wherein adjacent the gallery, the pump body and pump housing are sealed to one another by o-ring seals. 
     
     
         30 . The pump of  claim 16 , further comprising at least one gerotor pump.