EP 2567096 B1 20141217 - SCREW VACUUM PUMP
Title (en)
SCREW VACUUM PUMP
Title (de)
SCHRAUBEN-VAKUUMPUMPE
Title (fr)
POMPE À VIDE À VIS
Publication
Application
Priority
- DE 102010019402 A 20100504
- EP 2011057042 W 20110503
Abstract (en)
[origin: WO2011138318A2] The invention relates to a screw vacuum pump comprising screw rotors (12, 14) disposed in a suction chamber (10). The screw rotors (12, 14) are each supported by means of two bearing elements (20) in the pump housing and comprise a ratio of rotor length (I) to rotor axis spacing (d) that is greater than 3.0. The screw rotors (12, 14) further comprise a variable pitch, at least 7 turns, and an integral compression ratio of at least 4.5. The pitch after half of the turns is less than twice the pitch on the pressure side rotor outlet (24).
IPC 8 full level
F04C 18/16 (2006.01); F04C 18/08 (2006.01); F04C 25/02 (2006.01)
CPC (source: EP KR)
F04C 15/06 (2013.01 - KR); F04C 18/00 (2013.01 - KR); F04C 18/02 (2013.01 - KR); F04C 18/08 (2013.01 - KR); F04C 18/084 (2013.01 - EP); F04C 18/16 (2013.01 - EP KR); F04C 25/02 (2013.01 - EP KR); F04C 29/00 (2013.01 - KR); F04C 29/025 (2013.01 - KR); F04C 29/04 (2013.01 - EP); F04C 2240/20 (2013.01 - EP)
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)
DE 102010019402 A1 20111110; CN 102884324 A 20130116; CN 102884324 B 20160608; EP 2567096 A2 20130313; EP 2567096 B1 20141217; JP 2013525690 A 20130620; JP 5860035 B2 20160216; KR 101855398 B1 20180508; KR 20130100911 A 20130912; TW 201200733 A 20120101; TW I568935 B 20170201; WO 2011138318 A2 20111110; WO 2011138318 A3 20120816
DOCDB simple family (application)
DE 102010019402 A 20100504; CN 201180022605 A 20110503; EP 11718056 A 20110503; EP 2011057042 W 20110503; JP 2013508473 A 20110503; KR 20127031661 A 20110503; TW 100112787 A 20110413