EP 0191936 B1 19900307 - DIAPHRAGM PUMP WITH CIRCULATION SCAVENGING
Title (en)
DIAPHRAGM PUMP WITH CIRCULATION SCAVENGING
Publication
Application
Priority
DE 3446952 A 19841221
Abstract (en)
[origin: US4832581A] In a diaphgram pump with a diaphragm that separates a delivery chamber from a work-chamber filled entirely with fluid medium, and with a piston chamber which is connected to the diaphragm work-chamber by way of at least two passages and in which a displacement piston is reciprocatingly movable to effect the oscillatory actuation of the diaphragm, with the passages for flushing out gas bubbles shaped in such a manner that the mean velocity of flow in each single passage is always aimed in one stroke direction. The arrangement and shape of the passages connecting the work-chamber with the piston chamber is provided here in such a manner that the total resistance to flow of all the passages, made up of the parallel resistances of the individual passages, is different in one direction of flow than that in the other direction of flow, and that thereby there results in all passages a total transport flow for any gas bubbles contained in the fluid medium.
IPC 1-7
IPC 8 full level
F04B 43/02 (2006.01); F04B 43/06 (2006.01); F04B 43/067 (2006.01)
CPC (source: EP US)
F04B 43/067 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 3446952 A1 19860710; DE 3576387 D1 19900412; EP 0191936 A2 19860827; EP 0191936 A3 19870225; EP 0191936 B1 19900307; JP H0415400 B2 19920317; JP S61197778 A 19860902; US 4832581 A 19890523
DOCDB simple family (application)
DE 3446952 A 19841221; DE 3576387 T 19851217; EP 85116076 A 19851217; JP 28591585 A 19851220; US 81234885 A 19851223