EP 3670924 B1 20211117 - VACUUM PUMP AND METHOD FOR PRODUCING SAME
Title (en)
VACUUM PUMP AND METHOD FOR PRODUCING SAME
Title (de)
VAKUUMPUMPE UND VERFAHREN ZUR HERSTELLUNG EINER SOLCHEN
Title (fr)
POMPE À VIDE ET PROCÉDÉ DE FABRICATION D'UNE TELLE POMPE À VIDE
Publication
Application
Priority
EP 19210020 A 20191119
Abstract (en)
[origin: JP2021080917A] To facilitate the production of a Holweck groove.SOLUTION: A vacuum pump includes a Holweck pump stage 14, and the Holweck pump stage has a Holweck stator and a Holweck rotor that rotates about a rotor axis 12 during operation of the vacuum pump. The Holweck rotor interacts with the Holweck stator to produce pumping action, the Holweck pump stage has at least one threaded Holweck groove 16 and the Holweck groove is defined by at least one side wall 18. The side wall is a cross section on which the rotor axis is located, and is formed at least partially oblique to the rotor axis.SELECTED DRAWING: Figure 6
IPC 8 full level
F04D 19/04 (2006.01)
CPC (source: EP)
F04D 19/044 (2013.01); F05D 2230/10 (2013.01)
Citation (examination)
- EP 1797331 A1 20070620 - OERLIKON LEYBOLD VACUUM GMBH [DE]
- US 7090460 B2 20060815 - ENGLAENDER HEINRICH [DE], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3670924 A1 20200624; EP 3670924 B1 20211117; JP 2021080917 A 20210527; JP 7032500 B2 20220308
DOCDB simple family (application)
EP 19210020 A 20191119; JP 2020159322 A 20200924