EP 2348217 A3 20111130 - Rotary positive displacement blower with noise and shock reduction
Title (en)
Rotary positive displacement blower with noise and shock reduction
Title (de)
Rotationsgebläse mit Geräusch- und Schlagdämpfung
Title (fr)
Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations
Publication
Application
Priority
US 33649510 P 20100122
Abstract (en)
[origin: EP2348217A2] A roots-style blower (210) has a housing (214), rotors (230) and manifolds (212) for the housing (214). The housing (214) forms an inlet plenum (220), a rotor chamber (224) and a discharge plenum (228). The rotors (230) have straight lobes (232) spaced by pockets (240). The pocket (240X) that traps gas between a leading and following lobe (232) and an inside wall of the rotor chamber (224) is a temporary closed cell (240X). The manifolds (212) and the housing (214) form a pair of back-pass loops (250-251), one for each rotor (230). Each back-pass loop (250-252) comprises a back-pass chamber (250), outer channels (252) from the discharge plenum (228) to the back-pass chamber (250), and inner channels (251) to the rotor chamber (224). Wherein, the back-pass chamber (250) volume as a percentage of closed cell (240X) volume ranges between about fifty-six percent (56%) and one-hundred-seventeen percent (117%).
IPC 8 full level
F04C 18/12 (2006.01); F04C 29/06 (2006.01)
CPC (source: EP US)
F04C 18/126 (2013.01 - EP US); F04C 29/065 (2013.01 - EP US); F04C 29/068 (2013.01 - EP US); F04C 2240/30 (2013.01 - EP US)
Citation (search report)
- [IY] US 5439358 A 19950808 - WEINBRECHT JOHN F [US]
- [IDY] US 5702240 A 19971230 - O'NEAL ALAN D [US], et al
- [IY] GB 2178485 A 19870211 - AERZENER MASCHF GMBH
- [IY] GB 959855 A 19640603 - POLYSIUS GMBH
- [Y] WO 2006062741 A2 20060615 - CARRIER CORP [US], 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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2348217 A2 20110727; EP 2348217 A3 20111130; EP 2348217 B1 20130116; US 2012195783 A1 20120802; US 2016245287 A1 20160825
DOCDB simple family (application)
EP 11000544 A 20110124; US 201615050651 A 20160223; US 93109311 A 20110124