EP 1303702 A1 20030423 - TWIN SCREW ROTORS AND DISPLACEMENT MACHINES CONTAINING THE SAME
Title (en)
TWIN SCREW ROTORS AND DISPLACEMENT MACHINES CONTAINING THE SAME
Title (de)
ZWILLINGSSCHRAUBENROTOREN UND SOLCHE ENTHALTENDE VERDRÄNGERMASCHINEN
Title (fr)
ROTORS A VIS JUMELLES ET MACHINES VOLUMETRIQUES LES CONTENANT
Publication
Application
Priority
- CH 0100421 W 20010706
- CH 14722000 A 20000725
Abstract (en)
[origin: WO0208609A1] The twin screw rotors for axially parallel instalment in displacement machines for compressible media have asymmetrical transverse profiles and arc numbers which are >/= 2. The pitch (L) varies according to the angle of contact ( alpha ), increasing in a first partial area (T1) from the suction-side screw end, reaching a maximum value (Lmax) after completing an arc, decreasing in a second partial area (T2) until it reaches a minimum value (Lmin) and being constant in a third partial area (T3). The pitch curve in the first partial area (T1) is preferably mirror-symmetrical to that in the second partial area (T2); within the partial areas T1 to T2, the pitch curve is point-symmetrical to the average values in almost all cases, respectively. As a result, it is possible to obtain compact screw rotors which are completely free of unbalance, with compression rates of 1.0...10.0, even without profile variation. Rotors of this type offer excellent preconditions for reducing energy requirements, temperature, construction space and costs and for the free choice of materials, with applications in chemistry, pharmacy, packaging and semiconductor technology.
IPC 1-7
IPC 8 full level
F04C 18/08 (2006.01); F04C 18/16 (2006.01); F04C 25/02 (2006.01); F04C 29/00 (2006.01)
CPC (source: EP KR US)
F04C 18/08 (2013.01 - KR); F04C 18/084 (2013.01 - EP US); F04C 18/16 (2013.01 - EP US); F04C 2230/605 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0208609 A1 20020131; AT E483110 T1 20101015; AU 2001267247 B2 20050707; AU 6724701 A 20020205; BR 0112776 A 20030708; CA 2417051 A1 20020131; CA 2417051 C 20080916; CH 694339 A5 20041130; CH 694339 A9 20050315; CN 1242172 C 20060215; CN 1444700 A 20030924; CY 1110996 T1 20150611; CZ 20024019 A3 20030514; CZ 305182 B6 20150603; DE 50115648 D1 20101111; DK 1303702 T3 20110124; EP 1303702 A1 20030423; EP 1303702 B1 20100929; ES 2353460 T3 20110302; HK 1058814 A1 20040604; HU P0301145 A2 20030828; JP 2004504546 A 20040212; JP 2008196505 A 20080828; JP 4162485 B2 20081008; JP 4677469 B2 20110427; KR 100737321 B1 20070709; KR 20030026988 A 20030403; NO 20030357 D0 20030123; NO 20030357 L 20030123; PL 202364 B1 20090630; PL 362974 A1 20041102; PT 1303702 E 20101223; TW 587128 B 20040511; US 2003152475 A1 20030814; US 6702558 B2 20040309
DOCDB simple family (application)
CH 0100421 W 20010706; AT 01944852 T 20010706; AU 2001267247 A 20010706; AU 6724701 A 20010706; BR 0112776 A 20010706; CA 2417051 A 20010706; CH 14722000 A 20000725; CN 01813448 A 20010706; CY 101101166 T 20101217; CZ 20024019 A 20010706; DE 50115648 T 20010706; DK 01944852 T 20010706; EP 01944852 A 20010706; ES 01944852 T 20010706; HK 04101631 A 20040304; HU P0301145 A 20010706; JP 2002514266 A 20010706; JP 2008132867 A 20080521; KR 20037001047 A 20030124; NO 20030357 A 20030123; PL 36297401 A 20010706; PT 01944852 T 20010706; TW 90117924 A 20010723; US 29789102 A 20021211