EP 3638906 A1 20200422 - MULTI-STAGE ROTARY PISTON PUMP
Title (en)
MULTI-STAGE ROTARY PISTON PUMP
Title (de)
MEHRSTUFIGE WÄLZKOLBENPUMPE
Title (fr)
POMPE ROOTS À ÉTAGES MULTIPLES
Publication
Application
Priority
- DE 202017003212 U 20170617
- EP 2018063572 W 20180523
Abstract (en)
[origin: WO2018228784A1] The invention relates to a multi-stage rotary piston pump comprising two shafts in a housing, which support multiple rotary pistons. Corresponding rotary pistons form a respective rotary piston pair, wherein multiple rotary piston pairs are provided which form a respective pump stage. Neighbouring pump stages are each connected to one another via connection channels. The multi-stage rotary piston pump also comprises a pump inlet that is connected to the first pump stage, as well as a pump outlet that is connected to the last pump stage. According to the invention, the built-in volume ratio is at least 15, so that high pumping capacities of at least 1500 m3/h can be achieved.
IPC 8 full level
F04C 23/00 (2006.01); F04C 18/12 (2006.01); F04C 25/02 (2006.01); F04C 28/26 (2006.01); F04C 29/04 (2006.01)
CPC (source: EP KR US)
F04C 18/126 (2013.01 - EP KR); F04C 23/001 (2013.01 - EP KR); F04C 25/02 (2013.01 - EP KR US); F04C 28/16 (2013.01 - EP KR); F04C 29/04 (2013.01 - KR US); F04C 18/165 (2013.01 - US); F04C 29/04 (2013.01 - EP); F04C 2220/10 (2013.01 - US); F04C 2240/30 (2013.01 - US); F04C 2270/19 (2013.01 - EP KR US); F05C 2201/021 (2013.01 - EP KR)
Citation (search report)
See references of WO 2018228784A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 202017003212 U1 20180918; CN 110770444 A 20200207; CN 110770444 B 20211008; EP 3638906 A1 20200422; JP 2020524236 A 20200813; KR 102581752 B1 20230921; KR 20200019620 A 20200224; TW 201907091 A 20190216; TW I770196 B 20220711; US 2021140430 A1 20210513; WO 2018228784 A1 20181220
DOCDB simple family (application)
DE 202017003212 U 20170617; CN 201880032421 A 20180523; EP 18726990 A 20180523; EP 2018063572 W 20180523; JP 2019566303 A 20180523; KR 20197036597 A 20180523; TW 107120760 A 20180615; US 201816617355 A 20180523