Pump Apparatus

Abstract

A pump apparatus which is expected to realize satisfactory work efficiency of an assembly operation, reduction of noise and suppression of rust comprises: two pump units ( 22 and 23 ); a valve unit ( 24 ) provided between the pump units ( 22 and 23 ); and a fastening means ( 36 ) for fastening the pump units ( 22 and 23 ) to each other such that the valve unit ( 24 ) is able to be held by the pump units ( 22 and 23 ) therebetween.

1 . A pump apparatus comprising:
 two pump units;   a valve unit provided between the pump units; and   a fastening means for fastening the pump units to each other such that the valve unit is able to be held by the pump units therebetween.   
     
     
         2 . The pump apparatus according to  claim 1 , wherein the fastening means is provided so as to be inserted through the valve unit. 
     
     
         3 . The pump apparatus according to  claim 1 , further comprising a positioning means for positioning the pump units and the valve unit. 
     
     
         4 . The pump apparatus according to  claim 3 , wherein the positioning means is comprised of: a positioning projection which projects from a first end surface of the pump unit and a first end surface of the valve unit; and an opening which is formed on a second end surface and in which the positioning projection fits.