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1. WO2009004657 - VACUUM PUMP FOR A MOTOR VEHICLE ENGINE

Publication Number WO/2009/004657
Publication Date 08.01.2009
International Application No. PCT/IT2007/000476
International Filing Date 03.07.2007
IPC
F01C 1/344 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
1Rotary-piston machines or engines
30having the characteristics covered by two or more of groups F01C1/02, F01C1/08, F01C1/22, F01C1/24178
34having the movement defined in group F01C1/08 or F01C1/2297
344with vanes reciprocating with respect to the inner member
F01C 21/08 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
21Component parts, details, or accessories, not provided for in groups F01C1/-F01C20/121
08Rotary pistons
F04C 2/344 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
2Rotary-piston machines or pumps
30having the characteristics covered by two or more of groups F04C2/02, F04C2/08, F04C2/22, F04C2/24178
34having the movement defined in group F04C2/08 or F04C2/2297
344with vanes reciprocating with respect to the inner member
F04C 18/344 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
18Rotary-piston pumps specially adapted for elastic fluids
30having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48208
34having the movement defined in group F04C18/08 or F04C18/2297
344with vanes reciprocating with respect to the inner member
CPC
F01C 21/0881
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
21Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
08Rotary pistons
0809Construction of vanes or vane holders
0881the vanes consisting of two or more parts
F04C 18/3442
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
18Rotary-piston pumps specially adapted for elastic fluids
30having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
34having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
344with vanes reciprocating with respect to the inner member
3441the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
3442the surfaces of the inner and outer member, forming the inlet and outlet opening
F04C 2220/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
2220Application
10Vacuum
F04C 27/001
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
27Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
001Radial sealings for working fluid
Applicants
  • O.M.P. OFFICINE MAZZOCCO PAGNONI S.R.L. [IT]/[IT] (AllExceptUS)
  • LO BIUNDO, Giuseppe [IT]/[IT] (UsOnly)
  • DE RANGO, Alessandra [IT]/[IT] (UsOnly)
  • PAZZI, Giovanni [IT]/[IT] (UsOnly)
  • PACHETTI, Carlo [IT]/[IT] (UsOnly)
Inventors
  • LO BIUNDO, Giuseppe
  • DE RANGO, Alessandra
  • PAZZI, Giovanni
  • PACHETTI, Carlo
Agents
  • CASTIGLIA, Paolo
Priority Data
Publication Language English (EN)
Filing Language Italian (IT)
Designated States
Title
(EN) VACUUM PUMP FOR A MOTOR VEHICLE ENGINE
(FR) POMPE À VIDE POUR MOTEUR DE VÉHICULE MOTORISÉ
Abstract
(EN)
The invention relates to a vacuum pump (110, 210), in particular a single-vane vacuum pump for a motor vehicle engine, that advantageously allows to achieve a reduced wear of the end portions (122a, 122b, 222a, 222b) of the vane (120, 220) mounted on the pump. In particular, the vacuum pump comprises a stator (12), a chamber (14) defined inside said stator (12), said chamber (14) having a side wall (16.) whose transversal section has a predetermined shape,.a rotor (18) mounted in said chamber (14) and, capable of rotating around a rotation axis (0) parallel to said side wall (16), and a vane (120, 220) mounted on said rotor (18) and free to slide in a direction at right angles with respect to the rotation axis (0) of said rotor (18), said vane (120, 220) having a predetermined length (L2) and two opposite end portions (122a, 122b, 222a, 222b) that slide along the side wall (16) -of said chamber (14). According to the invention, at least one of said end portions (122a, 122b, 222a, 222b) of said' vane (120, 220) comprises. at least a part. (124) having a bend radius (R3) equal to that of a part (126) of said side wall (16).
(FR)
La présente invention concerne une pompe à vide (110, 210), en particulier une pompe à vide à palette unique pour un moteur de véhicule motorisé, qui permet de manière avantageuse de réduire l'usure des parties d'extrémité (122a, 122b, 222a, 222b) de la palette (120, 220) montée sur la pompe. En particulier, la pompe à vide comprend un stator (12), une chambre (14) définie à l'intérieur dudit stator (12), ladite chambre (14) présentant une paroi latérale (16) dont la section transversale présente une forme prédéterminée, un rotor (18) monté dans ladite chambre (14) et capable de tourner autour d'un axe de rotation (0) parallèle à ladite paroi latérale (16), et une palette (120, 220) montée sur ledit rotor (18) et libre de coulisser dans une direction à angles droits par rapport à l'axe de rotation (0) dudit rotor (18), ladite palette (120, 220) présentant une longueur prédéterminée (L2) et deux parties d'extrémité opposées (122a, 122b, 222a, 222b) qui coulissent le long de la paroi latérale (16) de ladite chambre (14). Selon l'invention, au moins une desdites parties d'extrémité (122a, 122b, 222a, 222b) de ladite palette (120, 220) comprend au moins une partie (124) dont le rayon de courbure (R3) est égal à celui d'une partie (126) de ladite paroi latérale (16).
Latest bibliographic data on file with the International Bureau