EP 2745015 B1 20211006 - ROOTS PUMP
Title (en)
ROOTS PUMP
Title (de)
WÄLZKOLBENPUMPE
Title (fr)
POMPE ROOTS
Publication
Application
Priority
- DE 202011104491 U 20110817
- EP 2012065406 W 20120807
Abstract (en)
[origin: WO2013023954A2] A Roots pump has a plurality of multiple-tooth rotary piston pairs (10, 48, 49) which form in each case one pump stage (50, 52, 54, 56, 58, 60). Adjacent pump stages (50, 52, 54, 56, 58, 60) are connected to one another via connecting ducts (30, 34, 77, 84, 86, 88, 90). In order to reduce the production costs, it is provided according to the invention to arrange the connecting ducts (30, 34, 77, 84, 86, 88, 90) in intermediate walls (74, 76, 78, 80, 82) which separate adjacent pump stages (50, 52, 54, 56, 58, 60) from one another.
IPC 8 full level
F04C 18/12 (2006.01); F04C 23/00 (2006.01)
CPC (source: EP RU US)
F04C 18/086 (2013.01 - EP US); F04C 18/126 (2013.01 - EP RU US); F04C 23/001 (2013.01 - EP US); F04C 23/003 (2013.01 - US); F04C 25/02 (2013.01 - EP US); F04C 23/001 (2013.01 - RU); F04C 23/003 (2013.01 - RU); F04C 25/02 (2013.01 - RU)
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 202011104491 U1 20121120; CN 103732923 A 20140416; CN 103732923 B 20160921; EP 2745015 A2 20140625; EP 2745015 B1 20211006; JP 2014521887 A 20140828; JP 6076343 B2 20170208; KR 101905228 B1 20181005; KR 20140049555 A 20140425; RU 2014109852 A 20150927; RU 2631579 C2 20170925; TW 201314032 A 20130401; TW I611101 B 20180111; US 2014205483 A1 20140724; US 9476423 B2 20161025; WO 2013023954 A2 20130221; WO 2013023954 A3 20131219
DOCDB simple family (application)
DE 202011104491 U 20110817; CN 201280039495 A 20120807; EP 12745685 A 20120807; EP 2012065406 W 20120807; JP 2014525400 A 20120807; KR 20147003957 A 20120807; RU 2014109852 A 20120807; TW 101126538 A 20120724; US 201214238611 A 20120807