.~.~ Having rigidly attached imperforate wall member
DEFINITION
Classification: 417/548
(under subclass 545) Apparatus in which the valved piston is slidable within a tube (e.g., cylinder) and has rigidly attached thereto a wall member which is in sealing engagement with said tube or another tube aligned and in open communication therewith, said wall member having a face portion in contact with the pumped fluid downstream of the valved piston and said first tube being provided with a discharge for pumped fluid positioned between said valved piston and wall member.
(1) Note. The discharge may be an annular passage surrounding the first or second tube.
