EP 0995879 B1 20040512 - Twin feed screw rotors
Title (en)
Twin feed screw rotors
Title (de)
Zwillings-Förderschraubenrotoren
Title (fr)
Vis transporteuses jumelées
Publication
Application
Priority
EP 98811063 A 19981023
Abstract (en)
[origin: EP0995879A1] The twin-screw rotor structure, for use in displacement machines for compressible materials and media, has a pitch which is not constant, and is defined by a variable related to the working angle round it. The pitch in the first section increases ( DELTA W1) from the entry end to a max. value after one turn angle. The following section has a reduced pitch to a min. value at a point of one turn angle before the outlet. The last, and third section, has a constant pitch ( DELTA W3). The spirals (7) have a constant thickness (h).
IPC 1-7
IPC 8 full level
F04C 18/16 (2006.01); F01C 1/08 (2006.01)
CPC (source: EP KR US)
F01C 1/084 (2013.01 - EP US); F01C 1/16 (2013.01 - KR)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0995879 A1 20000426; EP 0995879 B1 20040512; AR 020939 A1 20020605; AT E266800 T1 20040515; AU 5846499 A 20000515; BG 105371 A 20011031; BG 64490 B1 20050430; BR 9914716 A 20010807; CA 2347781 A1 20000504; CA 2347781 C 20081014; CN 1113151 C 20030702; CN 1324429 A 20011128; CZ 2001514 A3 20011212; CZ 296509 B6 20060315; DE 59811390 D1 20040617; EE 200100230 A 20020617; ES 2221141 T3 20041216; JP 2002528668 A 20020903; JP 3955731 B2 20070808; KR 100607156 B1 20060801; KR 20010080888 A 20010825; PA 8484601 A1 20011214; PE 20001430 A1 20001215; PL 202371 B1 20090630; PL 347374 A1 20020408; SK 2182001 A3 20011106; TR 200101123 T2 20010821; US 6447276 B1 20020910; WO 0025004 A1 20000504
DOCDB simple family (application)
EP 98811063 A 19981023; AR P990105343 A 19991022; AT 98811063 T 19981023; AU 5846499 A 19991001; BG 10537101 A 20010322; BR 9914716 A 19991001; CA 2347781 A 19991001; CH 9900466 W 19991001; CN 99812527 A 19991001; CZ 2001514 A 19991001; DE 59811390 T 19981023; EE P200100230 A 19991001; ES 98811063 T 19981023; JP 2000578545 A 19991001; KR 20017005036 A 20010421; PA 8484601 A 19991021; PE 00104799 A 19991018; PL 34737499 A 19991001; SK 2182001 A 19991001; TR 200101123 T 19991001; US 80773701 A 20010418