Invention Grant
- Patent Title: Screw pump having varying pitches
- Patent Title (中): 螺杆泵具有不同的间距
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Application No.: US12086034Application Date: 2006-12-04
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Publication No.: US08827669B2Publication Date: 2014-09-09
- Inventor: Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
- Applicant: Michael Henry North , Neil Turner , Tristan Richard Ghislain Davenne , Timothy Charles Draper
- Applicant Address: GB Crawley, West Sussex
- Assignee: Edwards Limited
- Current Assignee: Edwards Limited
- Current Assignee Address: GB Crawley, West Sussex
- Agency: Westman, Champlin & Koehler, P.A.
- Priority: GB0525378.6 20051213; GB0617388.4 20060905
- International Application: PCT/GB2006/050426 WO 20061204
- International Announcement: WO2007/068973 WO 20070621
- Main IPC: F03C2/00
- IPC: F03C2/00 ; F03C4/00 ; F04C18/00 ; F04C18/16 ; F04C18/08
Abstract:
A screw pump includes a stator having a fluid inlet and a fluid outlet, the stator housing first and second externally threaded, tapered rotors mounted on respective shafts and adapted for counter-rotation within the stator to compress fluid passing from the fluid inlet to the fluid outlet, wherein the threads have a pitch that increases towards the fluid outlet.
Public/Granted literature
- US20100296958A1 Screw Pump Public/Granted day:2010-11-25
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