EP 1130263 A3 20020724 - Helical gear vacuum pump
Title (en)
Helical gear vacuum pump
Title (de)
Schrägverzahnte Vakuumpumpe
Title (fr)
Pompe à vide à engrenages helicoidaux
Publication
Application
Priority
GB 0004263 A 20000223
Abstract (en)
[origin: EP1130263A2] A vacuum pump includes a pump body 20 in which is mounted two externally threaded rotors 7,8. The thread profile of each rotor is tapered in a substantially radial direction to facilitate the machining and fitting of the rotors 7,8 with the required close tolerances. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 18/08 (2006.01); F04C 18/16 (2006.01); F04C 25/02 (2006.01)
CPC (source: EP US)
F04C 18/084 (2013.01 - EP US); F04C 18/16 (2013.01 - EP US)
Citation (search report)
- [X] DE 594691 C 19340321 - AEG
- [X] GB 419338 A 19341109 - BRITISH THOMSON HOUSTON CO LTD
- [X] DE 29720541 U1 19990318 - SIHI IND CONSULT GMBH [DE]
- [X] GB 552562 A 19430414 - STOTHERT & PITT LTD, et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1130263 A2 20010905; EP 1130263 A3 20020724; GB 0004263 D0 20000412; JP 2001304156 A 20011031; US 2001041145 A1 20011115
DOCDB simple family (application)
EP 01301502 A 20010220; GB 0004263 A 20000223; JP 2001102099 A 20010223; US 79152501 A 20010222