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Machine translation
1. (WO2005121561) VACUUM PUMP IMPELLER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/121561    International Application No.:    PCT/GB2005/002005
Publication Date: 22.12.2005 International Filing Date: 23.05.2005
IPC:
F04D 29/02 (2006.01), F04D 19/04 (2006.01)
Applicants: THE BOC GROUP PLC [GB/GB]; Chertsey Road, Windlesham, Surrey GU20 6HJ (GB) (For All Designated States Except US).
OKOROAFOR, Emmanuel, Uzoma [GB/GB]; (GB) (For US Only).
MILNER, Paul [GB/GB]; (GB) (For US Only).
SIEW, Chan-Cheong [MY/GB]; (GB) (For US Only)
Inventors: OKOROAFOR, Emmanuel, Uzoma; (GB).
MILNER, Paul; (GB).
SIEW, Chan-Cheong; (GB)
Agent: BOOTH, Andrew, Steven; The BOC Group Plc, Chertsey Road, Windlesham, Surrey GU20 6HJ (GB)
Priority Data:
0412667.8 07.06.2004 GB
Title (EN) VACUUM PUMP IMPELLER
(FR) TURBINE DE POMPE A VIDE
Abstract: front page image
(EN)An impeller (10) for a turbomolecular vacuum pump comprises a shaft (12) having mounted thereon a plurality of rotor elements (14, 16). Part of the shaft (12) extends around magnetic bearing means (20) located within a bore of the shaft (12). At least this part of the shaft (12) is formed from titanium or an alloy thereof so that the bearing means (20) can remain in compression during use of the impeller (10), thereby inhibiting cracking of the bearing means (20).
(FR)L'invention concerne une turbine (10) destinée à une pompe à vide turbomoléculaire et comprenant un arbre (12) sur lequel une pluralité d'éléments de rotor (14, 16) sont montés. Une partie de cet arbre (12) s'étend autour d'un organe de palier magnétique (20) situé à l'intérieur d'un alésage de l'arbre (12). Au moins cette partie de l'arbre (12) est constituée de titane ou d'un alliage de titane de sorte que l'organe de palier (20) puisse rester dans un état de compression pendant l'utilisation de la turbine (10), ce qui empêche la fissuration dudit organe de palier (20).
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, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, 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, 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)