EP 0147567 B1 19880831 - GEAR PUMP, PARTICULARLY FOR MEDICAL PURPOSES
Title (en)
GEAR PUMP, PARTICULARLY FOR MEDICAL PURPOSES
Publication
Application
Priority
DE 3340748 A 19831110
Abstract (en)
[origin: US4583924A] A gear pump (1) comprises a pump housing (2) in which two stationary journals (12,13) are disposed. On the journals (12,13) a driving pump wheel (7) and a driven pump wheel (8) are mounted. The driving pump wheel (7) in the example is integrally joined to a shaft (16) which is constructed as hollow shaft and on which a hub (24) with a magnet (11) is disposed as part of a magnetic coupling of the gear pump (1). With this construction a wear of the journals (12,13) in their bearing region in the pump housing (2) under the action of aggressive cleaning agents such as acetic acid is prevented because the journals (12 and 13) do not rotate in their bearings. On the other hand, by provision of the shaft (16) constructed as hollow shaft the drive connection is established between the driving pump wheel (7) and the magnet (11) forming part of the magnetic coupling, and wear of the shaft (16 ) rotating on the journal (12) is prevented by constructing said shaft from a particularly anti-frictional plastic which is also used for the pump wheels (7 and 8).
IPC 1-7
IPC 8 full level
F04C 2/08 (2006.01); F04C 2/14 (2006.01); F04C 15/00 (2006.01)
CPC (source: EP US)
F04C 2/084 (2013.01 - EP US); F04C 15/0073 (2013.01 - EP US); F04C 15/0069 (2013.01 - EP US); F05C 2225/04 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0147567 A2 19850710; EP 0147567 A3 19860108; EP 0147567 B1 19880831; DE 3340748 A1 19850530; DE 3340748 C2 19860925; DE 3473785 D1 19881006; US 4583924 A 19860422
DOCDB simple family (application)
EP 84113140 A 19841031; DE 3340748 A 19831110; DE 3473785 T 19841031; US 66963284 A 19841107