WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |

Search International and National Patent Collections
World Intellectual Property Organization
Machine translation
1. (WO2007015056) VACUUM PUMP
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2007/015056    International Application No.:    PCT/GB2006/002679
Publication Date: 08.02.2007 International Filing Date: 18.07.2006
F04C 18/12 (2006.01), F04C 23/00 (2006.01), F04C 18/08 (2006.01)
Applicants: EDWARDS LIMITED [GB/GB]; Manor Royal, Crawley, West Sussex RH10 9LW (GB) (For All Designated States Except US).
SCHOFIELD, Nigel, Paul [GB/GB]; (GB) (For US Only).
BIRCH, Peter, Hugh [GB/GB]; (GB) (For US Only)
Inventors: SCHOFIELD, Nigel, Paul; (GB).
BIRCH, Peter, Hugh; (GB)
Agent: BOOTH, Andrew, Steven; Edwards Limited, Manor Royal, Crawley, West Sussex RH10 2LW (GB)
Priority Data:
0515905.8 02.08.2005 GB
Abstract: front page image
(EN)A multistage vacuum pump comprises a stator housing a multistage rotor assembly, each stage comprising intermeshing Roots rotor components, wherein the tip radius of the rotor components at an inlet stage of the pump is larger than the tip radius of the rotor components at an exhaust stage of the pump.
(FR)La présente invention concerne une pompe à vide multicellulaire comprenant un stator renfermant un bloc rotor multicellulaire, chaque cellule comprenant des composants de rotor Roots, le rayon périphérique des composants de rotor au niveau d’une cellule d’amenée de la pompe étant supérieur au rayon périphérique des composants de rotor au niveau d’une cellule de refoulement de la pompe.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)