EP 0933529 A3 20000607 - Internal gear pump with empty crescent space
Title (en)
Internal gear pump with empty crescent space
Title (de)
Sichellose Innenzahnradpumpe
Title (fr)
Pompe à engrenages internes sans croissant
Publication
Application
Priority
DE 19804133 A 19980203
Abstract (en)
[origin: EP0933529A2] The hollow wheel (1) has radial breakthroughs (1.1), which produce a conductive connection between the tooth base and the cover surface of the hollow wheel. Between the supporting flanks of the teeth (1.3) of the hollow wheel or the teeth (2.2) of the pinion and the radial holes of the hollow wheel conductive connections are produced. The conductive connections consist of grooves, which extend over a part of the length of the flanks, or over the complete flank length of the teeth. Several grooves are provided in each flank axially next to one another.
IPC 1-7
IPC 8 full level
F04C 2/08 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01)
CPC (source: EP KR US)
F04C 2/084 (2013.01 - EP US); F04C 2/10 (2013.01 - KR); F04C 2/102 (2013.01 - EP US); F04C 15/0007 (2013.01 - EP US); Y10T 74/19972 (2015.01 - EP US)
Citation (search report)
- [YA] US 4813853 A 19890321 - OTTO DIETER [DE], et al
- [DY] EP 0607497 A1 19940727 - VOITH GMBH J M [DE]
- [A] US 2845031 A 19580729 - GUIBERT FRANCIS W
- [A] US 5711660 A 19980127 - MITARAI MUTSUMI [JP], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 1995, no. 07 31 August 1995 (1995-08-31)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0933529 A2 19990804; EP 0933529 A3 20000607; DE 19804133 A1 19990812; JP H11257246 A 19990921; KR 19990072376 A 19990927; US 6164943 A 20001226
DOCDB simple family (application)
EP 98120950 A 19981105; DE 19804133 A 19980203; JP 666599 A 19990113; KR 19990003393 A 19990202; US 24112599 A 19990201