EP 1556610 A2 20050727 - IMPROVED SCREW ROTOR DEVICE
Title (en)
IMPROVED SCREW ROTOR DEVICE
Title (de)
VERBESSERTE SCHRAUBENROTORVORRICHTUNG
Title (fr)
DISPOSITIF A ROTOR EN FORME DE VIS AMELIORE
Publication
Application
Priority
- US 0334158 W 20031028
- US 28342202 A 20021029
- US 28342102 A 20021029
Abstract (en)
[origin: WO2004040133A2] A screw rotor device has a pair of intermeshing rotors (14, 16) that are rotatably mounted in a housing around a pair of axes (26, 28). The cross-sectional shape of the rotors can be identical, i.e., twin rotors, or the rotors may have different cross-sectional shapes, i.e., a male and female. Generally, the screw rotor has an identical number of threads and the twisting of the cross-sectional shape along the respective rotor axes results in a helical shape for each rotor that intermeshes with the other rotor (14, 16). Accordingly, the rotors (14, 16) can be referred to as having intermeshing helical element pairs (34, 36). In several aspects of the invention, the helical element pairs can be, in the alternative or in any combination, a phase-offset thread and a corresponding phase-offset groove, a pair of single-pitch buttress threads (50), or a pair of single-pitch concave/convex threads.
IPC 1-7
IPC 8 full level
CPC (source: EP)
F01C 1/084 (2013.01); F01C 1/16 (2013.01)
Citation (search report)
See references of WO 2004040133A2
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2004040133 A2 20040513; WO 2004040133 A3 20040701; AU 2003285043 A1 20040525; CA 2504474 A1 20040513; CA 2504474 C 20080909; EP 1556610 A2 20050727; MX PA05004582 A 20050726
DOCDB simple family (application)
US 0334158 W 20031028; AU 2003285043 A 20031028; CA 2504474 A 20031028; EP 03779360 A 20031028; MX PA05004582 A 20031028