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1. (WO2010074965) SPIRAL PUMPING STAGE AND VACUUM PUMP INCORPORATING SUCH PUMPING STAGE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/074965 International Application No.: PCT/US2009/067186
Publication Date: 01.07.2010 International Filing Date: 08.12.2009
IPC:
F04C 18/02 (2006.01) ,F04C 29/00 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
C
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
18
Rotary-piston pumps specially adapted for elastic fluids
02
of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
C
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
29
Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups F04C18/-F04C28/193
Applicants:
AGILENT TECHNOLOGIES, INC [US/US]; CPA Global P.O. Box 52050 Minneapolis, MN 55402, US (AllExceptUS)
HELMER, John C. [US/US]; US (UsOnly)
GIORS, Silvio [IT/IT]; IT (UsOnly)
Inventors:
HELMER, John C.; US
GIORS, Silvio; IT
Agent:
IMPERATO, John, L.; Agilent Technologies, Inc. CPA Global P.O. Box 52050 Minneapolis, MN 55402, US
Priority Data:
12/343,98024.12.2008US
Title (EN) SPIRAL PUMPING STAGE AND VACUUM PUMP INCORPORATING SUCH PUMPING STAGE
(FR) ÉTAGE DE POMPAGE SPIRAL ET POMPE À VIDE INTÉGRANT UN TEL ÉTAGE DE POMPAGE
Abstract:
(EN) A molecular spiral-type vacuum pumping stage comprises a smooth surfaces rotor disk cooperating with a stator body. The stator body comprises a plurality of spiral channels on at least one surface facing the rotor disk. The cross-section area (σ) of these channels are reduced from the center to the outer periphery of the stator body so that the condition is satisfied according to which the internal channel speed, i.e. the product of the channel cross-section area and half the rotor velocity normal to the aforesaid area, is constant throughout the channels. Due to this arrangement, it is possible to avoid the risk of internal compression or re-expansions, this limiting the power losses. The present invention also refers to a vacuum pump comprising at least one pumping stage as described above.
(FR) On décrit un étage de pompe à vide moléculaire de type spiral comportant un disque de rotor à surfaces lisses coopérant avec un corps de stator. Le corps de stator comporte une pluralité de canaux en spirale sur au moins une surface faisant face au disque de rotor. L'aire en section droite (σ) desdits canaux se réduit en allant du centre vers la périphérie extérieure du corps de stator, de façon à satisfaire une condition selon laquelle la vitesse interne des canaux, c'est-à-dire le produit de l'aire en section droite des canaux et de la moitié de la vitesse du rotor normale à ladite aire, est constante sur toute l'étendue des canaux. En raison de cette disposition, il est possible d'éviter le risque de compression ou de détentes réitérées internes, limitant ainsi les pertes de puissance. La présente invention concerne également une pompe à vide comportant au moins un étage de pompage tel que décrit ci-dessus.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, 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)
Also published as:
CN102265037CN104895786