EP 0072636 A2 19830223 - N/N +1 lobed rotary fluid pumps.
Title (en)
N/N +1 lobed rotary fluid pumps.
Title (de)
Fluidumdrehkolbenpumpen mit N/N +1 Zähnen.
Title (fr)
Pompes rotatives à fluide à N/N +1 lobes.
Publication
Application
Priority
GB 8124995 A 19810815
Abstract (en)
In an N, N+1 lobe type pump, dirt clearances are provided at the bases of the interlobe roots 22 of the annulus 14 and the shaping and dimensioning of the inner rotor and annulus are such that elsewhere there is a normal running clearance at the zones of drive contact between the two rotors. To prevent the creation of excessive clearances in the positions of full mesh especially at position D, the inner rotor 10 and annulus 14 are conjugate (as defined) such that at positions B and D normal running clearances are maintained.
IPC 1-7
IPC 8 full level
F04C 2/08 (2006.01)
CPC (source: EP)
F04C 2/084 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0072636 A2 19830223; EP 0072636 A3 19830309; ES 514979 A0 19831016; ES 8400180 A1 19831016; GB 2104153 A 19830302; GB 2104153 B 19840830
DOCDB simple family (application)
EP 82303950 A 19820727; ES 514979 A 19820813; GB 8124995 A 19810815