EP 0486556 B1 19960508 - PULSELESS PISTON PUMP
Title (en)
PULSELESS PISTON PUMP
Title (de)
IMPULSFREIE KOLBENPUMPE
Title (fr)
POMPE A PISTON SANS IMPULSIONS
Publication
Application
Priority
- US 39109789 A 19890808
- US 9003786 W 19900705
Abstract (en)
[origin: WO9102158A1] A multiple piston cylinder reciprocating pump (10) is provided with a cam drive (18) such that the sum of the velocities during the pumping strokes off all of the cylinders is generally constant. The leak free design is provided by utilizing a diaphragm (36) attached to the piston (34) between the main seal assembly and the cam (18). A flow through intake design is provided which flows incoming material around the piston (34) between the diaphragm (36) and the main seal to prevent the build-up and hardening of material on the piston (34) and in the seal area. The intake (40) and exhaust (56) passages are arranged such that air pockets cannot be formed and any air bubbles which find their way into the pump will rise upwardly out of the pump without restriction.
IPC 1-7
IPC 8 full level
F04B 9/04 (2006.01); F04B 1/02 (2006.01); F04B 11/00 (2006.01); F04B 23/06 (2006.01); F04B 43/02 (2006.01); F04B 53/06 (2006.01)
CPC (source: EP)
F04B 1/02 (2013.01); F04B 11/0066 (2013.01); F04B 23/06 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9102158 A1 19910221; DE 69026945 D1 19960613; DE 69026945 T2 19961031; EP 0486556 A1 19920527; EP 0486556 A4 19920708; EP 0486556 B1 19960508; JP H05501138 A 19930304
DOCDB simple family (application)
US 9003786 W 19900705; DE 69026945 T 19900705; EP 90912068 A 19900705; JP 51127890 A 19900705