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1. (WO2007003215) VACUUM VANE PUMP WITH DISCHARGE VALVE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/003215 International Application No.: PCT/EP2005/007317
Publication Date: 11.01.2007 International Filing Date: 05.07.2005
IPC:
F04C 18/344 (2006.01) ,F04C 29/12 (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
30
having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48208
34
having the movement defined in group F04C18/08 or F04C18/2297
344
with vanes reciprocating with respect to the inner member
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
12
Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Applicants:
VHIT S.P.A. [IT/IT]; Via Cavalli 53/A I-26013 CREMA, IT (AllExceptUS)
CADEDDU, Leonardo [IT/IT]; IT (UsOnly)
Inventors:
CADEDDU, Leonardo; IT
Agent:
PATRITO, Pier, Franco; Patent Agency Patrito Brevetti Via Don Minzoni 14 I-10121 Torino, IT
Priority Data:
Title (EN) VACUUM VANE PUMP WITH DISCHARGE VALVE
(FR) POMPE À VIDE À PALETTES AVEC SOUPAPE DE REFOULEMENT
Abstract:
(EN) A vacuum pump comprising a pump chamber (2-3), a blade pumping mechanism (4-5), especially a single blade (4) pumping mechanism, an outlet opening (8), and valve means (9) suitable for allowing fluids to pass through the outlet opening (8) in the exit sense and not in the entry sense, wherein the outlet opening (8) comprises a permanent communication with the outside, through a passage (10) having a little section and being permanently open. Advantageously, the passage (10) may consist in a little hole (10) formed in the valve means (9), which are embodied in the form of a lamellar shutter (9) movable between a closure position and a passage position. Otherwise the passage (10) may comprise conformations of openings -or vents formed in the valve means (9) controlling the outlet opening (8) of the pump, or may comprise grooves or vents formed in the seat of the outlet opening (8) of the pump against which come to rest the valve means (9).
(FR) La présente invention concerne une pompe à vide qui comprend une chambre de pompe (2-3), un mécanisme de pompage à palettes (4-5), particulièrement un mécanisme de pompage à palette unique (4), une ouverture de sortie (8), et des moyens de soupape (9) appropriés pour permettre à des fluides de passer à travers l’ouverture de sortie (8) dans le sens de sortie et non dans le sens d’entrée. L’ouverture de sortie (8) comprend une communication permanente avec l’extérieur, à travers un passage (10) qui possède une petite section et est ouvert en permanence. Avantageusement, le passage (10) peut être constitué d’un petit trou (10) formé dans les moyens de soupape (9), qui sont réalisés sous forme de volets lamellaires (9) mobiles entre une position de fermeture et une position de passage. Autrement, le passage (10) peut comprendre des conformations d’ouvertures ou d’évents formées dans les moyens de soupape (9) qui commandent l’ouverture de sortie (8) de la pompe, ou peut comprendre des rainures ou évents formés dans le siège de l’ouverture de sortie (8) de la pompe contre lesquels reposent les moyens de soupape (9).
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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 (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, 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)