EP 0607497 B1 19960612 - Internal gear pump with sealings incorporated in the teeth
Title (en)
Internal gear pump with sealings incorporated in the teeth
Title (de)
Sichellose Innenzahnradpumpe mit in die Zahnköpfe eingesetzten Dichtelementen
Title (fr)
Pompe à engrenages internes avec joint d'étanchéité incorporé dans les dents
Publication
Application
Priority
DE 4301104 A 19930118
Abstract (en)
[origin: EP0607497A1] The invention relates to a crescent-less internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear. Pinion and ring gear are rotatably mounted in a casing section which has a suction connection and a discharge connection; the ring gear has radial openings for the medium to be pumped; there is provided, in the tooth tips of the ring gear and in the tooth tips of the pinion, respectively, a profiled groove, into which one sealing element each is inserted which is able to slide on the opposite tooth tip of the pinion or the ring gear, respectively. The invention is characterised by the following features: the profiled groove is - as seen in a section perpendicular to the axis - free of connections; each of the individual sealing elements is provided with a duct which establishes a connection between the interior of the profiled groove and the sealing surface of the sealing element; the duct is enclosed - as seen in the direction of revolution of the pinion - by the material of the sealing element. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 2/10 (2006.01); F04C 15/00 (2006.01)
CPC (source: EP US)
F04C 2/102 (2013.01 - EP US); F04C 15/0019 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0607497 A1 19940727; EP 0607497 B1 19960612; AT E139305 T1 19960615; DE 59302915 D1 19960718; DK 0607497 T3 19961021; ES 2090799 T3 19961016; JP H06241174 A 19940830; US 5451150 A 19950919
DOCDB simple family (application)
EP 93114117 A 19930903; AT 93114117 T 19930903; DE 59302915 T 19930903; DK 93114117 T 19930903; ES 93114117 T 19930903; JP 35018893 A 19931229; US 16303393 A 19931206