WO1997011277A1 - Rotary vane pump - Google Patents

Rotary vane pump Download PDF

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Publication number
WO1997011277A1
WO1997011277A1 PCT/EP1996/003942 EP9603942W WO9711277A1 WO 1997011277 A1 WO1997011277 A1 WO 1997011277A1 EP 9603942 W EP9603942 W EP 9603942W WO 9711277 A1 WO9711277 A1 WO 9711277A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
bore
cylinder
cylindrical
pallet
Prior art date
Application number
PCT/EP1996/003942
Other languages
French (fr)
Inventor
Alberto Torazzi
Alberto Bonomi
Original Assignee
Robert Bosch Sistemi Frenanti S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Sistemi Frenanti S.P.A. filed Critical Robert Bosch Sistemi Frenanti S.P.A.
Priority to DE69606315T priority Critical patent/DE69606315T2/en
Priority to EP96931052A priority patent/EP0851980B1/en
Priority to JP9512356A priority patent/JPH11512506A/en
Publication of WO1997011277A1 publication Critical patent/WO1997011277A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0818—Vane tracking; control therefor
    • F01C21/0854—Vane tracking; control therefor by fluid means
    • F01C21/0872—Vane tracking; control therefor by fluid means the fluid being other than the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0818—Vane tracking; control therefor
    • F01C21/0827—Vane tracking; control therefor by mechanical means
    • F01C21/0836—Vane tracking; control therefor by mechanical means comprising guiding means, e.g. cams, rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • the present invention relates to a rotary pump comprising: a stator pierced with a bore delimited by a bottom, by a cover, and by a cylindrical side wall having a relatively large radius; a cylindrical rotor, disposed in the bore, tangent to the cylindrical side wall, and capable of being driven in rotation about an axis eccentric with respect to this bore; at least two identical pallets slidingly housed in radial housings of the rotor and integral in rotation with this rotor, each pallet having a width defined between first and second edges, the first of which bears on the side wall of the bore; and a cylinder coaxial with the cylindrical wall of the bore and having a relatively small radius, the width of each pallet being substantially equal to the difference between the relatively large and small radii.
  • Rotary pumps have been known and used for many decades for multiple applications, and a pump of the previously defined type is for example described in patent document JP-A-62 170 701.
  • the present invention is in this context and aims to provide a rotary type vacuum pump, with an improved lubrication system.
  • the pump of the invention is essentially characterized in that it comprises a pressurized oil circuit itself comprising a channel in the bottom of the bore and a groove dug in the rotor, communicating both with the channel and with each radial housing for .
  • each pallet comes selectively into contact by its second edge with the cylinder and cooperates with it to form in the rotor at least one compression chamber and one expansion chamber, the oil thus exerting a centrifugal radial thrust on the pallets and being forced to flow from the compression chamber to the expansion chamber
  • the cylinder coaxial with the cylindrical wall of the bore is integral with the cover.
  • FIG. 1 is a sectional view of a pump according to the invention, the section being made perpendicular to the axis of rotation of the rotor, and the rotor being presented in a first position;
  • FIG. 2 is a sectional view of a pump according to the invention, the section being made perpendicular to the axis of rotation of the rotor, and the rotor being presented in a second position;
  • Figure 3 is a sectional view along line 3-3 of Figure 1;
  • the invention relates to a rotary pump which can be used as a pneumatic vacuum pump, essentially comprising a stator I, a rotor 2, and two vanes 3 and 4.
  • the stator 1 is pierced with a bore 1 1 delimited by a bottom 1 1 1, and by a cover 1 12, and by a cylindrical side wall 1 13 having a relatively large radius R
  • the rotor 2 is itself cylindrical, hollow, disposed inside the bore 1 1, in tangent and sealed contact with the latter, and equipped with a coaxial drive shaft 23, the shaft 23 passing through the base 1 1 1 of the stator and having a driving relief 24 accessible outside the bore, so as to allow the rotor to be driven in rotation about an axis X, eccentric relative to the bore 1 1.
  • the two pallets 3 and 4 are identical, housed sliding in respective radial housings 25, 26 of the rotor, and integral in rotation with this rotor, each pallet having a width defined between first and second edges 3 i, 32, 41, 42, and ie the first being supported on the side wall I 13 of the bore
  • This pump has a pressurized oil circuit comprising a channel 5 arranged in the bottom of the bore and a groove 6 hollowed out in the rotor, communicating both with channel 5 and with each radial housing 25, 26 for bringing pressurized oil to the second edge 32, 42 of each pallet 3, 4
  • each pallet 3, 4 selectively comes into contact via its second edge 32, 42 with the cylinder 7 and cooperates with it to form in the rotor at least one compression chamber 8 and an expansion chamber 9, the oil thus exerting a centrifugal radial thrust on the pallets and being forced to flow from the compression chamber to the expansion chamber.
  • the cylinder 7 coaxial with the cylindrical wall 1 13 of the bore, is preferably secured to the cover 1 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

A rotary pump including a stator (1) with a bore (11) defined by a cylindrical side wall (113), a cylindrical rotor (2) tangent to the inside of the bore (11) and rotatable about an axis (X) that is off-centre relative to said bore, and two vanes (3, 4) slidably fitted in radial housings (e.g. 25) in the rotor (2) and each provided with two opposite edges (e.g. 31, 32) of which the first (31) engages the side wall (113) of the bore. The rotor (2) is hollow, a cylinder (7) coaxial with the cylindrical wall (113) of the bore fits into the rotor, and each vane selectively engages the cylinder to form in the rotor a compression chamber and an expansion chamber between which passes an oil flow fed through a channel (5) in the bottom wall of the bore and a groove (6) in the rotor.

Description

POMPE ROTATIVE A PALETTES ROTARY VANE PUMP
La présente invention concerne une pompe rotative comprenant : un stator percé d'un alésage délimité par un fond, par un couvercle, et par une paroi latérale cylindrique présentant un rayon relativement grand; un rotor cylindrique, disposé dans l'alésage, tangent à la paroi latérale cylindrique, et susceptible d'être entraîné en rotation autour d'un axe excentré par rapport à cet alésage; au moins deux palettes identiques logées à coulissement dans des logements radiaux du rotor et solidaires en rotation de ce rotor, chaque palette présentant une largeur définie entre des premier et second bords dont le premier est en appui sur la paroi latérale de l'alésage; et un cylindre coaxial avec la paroi cylindrique de l'alésage et présentant un rayon relativement petit, la largeur de chaque palette étant sensiblement égale à la différence entre les rayons relativement grand et petit.The present invention relates to a rotary pump comprising: a stator pierced with a bore delimited by a bottom, by a cover, and by a cylindrical side wall having a relatively large radius; a cylindrical rotor, disposed in the bore, tangent to the cylindrical side wall, and capable of being driven in rotation about an axis eccentric with respect to this bore; at least two identical pallets slidingly housed in radial housings of the rotor and integral in rotation with this rotor, each pallet having a width defined between first and second edges, the first of which bears on the side wall of the bore; and a cylinder coaxial with the cylindrical wall of the bore and having a relatively small radius, the width of each pallet being substantially equal to the difference between the relatively large and small radii.
Les pompes rotatives sont connues et utilisées depuis de nombreuses décennies pour de multiples applications, et une pompe du type précédemment défini se trouve par exemple décrite dans le document de brevet JP-A-62 170 701.Rotary pumps have been known and used for many decades for multiple applications, and a pump of the previously defined type is for example described in patent document JP-A-62 170 701.
Cependant, la conception de ces pompes présente toujours des difficultés importantes, qui restent largement dépendantes des applications auxquelles ces pompes sont destinées.However, the design of these pumps still presents significant difficulties, which remain largely dependent on the applications for which these pumps are intended.
En particulier, les problèmes qui se posent traditionnellement dans la conception de pompes à vide se concentrent essentiellement sur l'obtention d'une lubrification suffisamment efficace pour garantir un excellent rendement de la pompe lors de son démarrage à froid, et un échauffement limité en fonctionnement continuIn particular, the problems which traditionally arise in the design of vacuum pumps essentially focus on obtaining lubrication which is sufficiently effective to guarantee an excellent performance of the pump during its cold start, and limited heating during operation. continued
La présente invention se situe dans ce contexte et a pour but de proposer une pompe à vide de type rotatif, dotée d'un système de lubrification perfectionné.The present invention is in this context and aims to provide a rotary type vacuum pump, with an improved lubrication system.
A cette fin, la pompe de l'invention,, par ailleurs conforme à la définition générale qui en est donnée ci-dessus, est essentiellement caractérisée en ce qu'elle comprend un circuit d'huile sous pression comprenant lui-même un canal aménagé dans le fond de l'alésage et une gorge creusée dans le rotor, communiquant à la fois avec le canal et avec chaque logement radial pour . "7To this end, the pump of the invention, moreover conforming to the general definition which is given above, is essentially characterized in that it comprises a pressurized oil circuit itself comprising a channel in the bottom of the bore and a groove dug in the rotor, communicating both with the channel and with each radial housing for . "7
amener de l'huile sous pression sur le second bord de chaque palette, en ce que le rotor est creux, et en ce que le cylindre pénètre dans le rotor, ce dont il résulte que chaque palette vient sélectivement en contact par son second bord avec le cylindre et coopère avec lui pour former dans le rotor au moins une chambre de compression et une chambre de dilatation, l'huile exerçant ainsi une poussée radiale centrifuge sur les palettes et étant forcée à circuler de la chambre de compression vers la chambre de dilatationbringing oil under pressure to the second edge of each pallet, in that the rotor is hollow, and in that the cylinder penetrates into the rotor, which results in that each pallet comes selectively into contact by its second edge with the cylinder and cooperates with it to form in the rotor at least one compression chamber and one expansion chamber, the oil thus exerting a centrifugal radial thrust on the pallets and being forced to flow from the compression chamber to the expansion chamber
Bien que le brevet antérieur GB 480 522 décrive une pompe rotative dont le rotor peut être au moins partiellement creux, ce document ne décrit pas l'emploi d'un cylindre coaxial avec la paroi cylindrique de l'alésage et qui pénétrerait dans le rotor, ni les autres caractéristiques de l'invention, de sorte que la pompe connue par ce document ne peut présenter des avantages comparables à ceux que permet d'obtenir la pompe de l'invention.Although the prior patent GB 480 522 describes a rotary pump whose rotor can be at least partially hollow, this document does not describe the use of a cylinder coaxial with the cylindrical wall of the bore and which would penetrate into the rotor, nor the other characteristics of the invention, so that the pump known by this document cannot have advantages comparable to those which the pump of the invention makes it possible to obtain.
Dans un mode préféré de l'invention, le cylindre coaxial avec la paroi cylindrique de l'alésage est solidaire du couvercle.In a preferred embodiment of the invention, the cylinder coaxial with the cylindrical wall of the bore is integral with the cover.
D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels:Other characteristics and advantages of the invention will emerge clearly from the description given below, by way of indication and in no way limitative, with reference to the appended drawings, in which:
- la figure 1 est une vue en coupe d'une pompe conforme à l'invention, la coupe étant réalisée perpendiculairement à l'axe de rotation du rotor, et le rotor étant présenté dans une première position;- Figure 1 is a sectional view of a pump according to the invention, the section being made perpendicular to the axis of rotation of the rotor, and the rotor being presented in a first position;
- la figure 2 est une vue en coupe d'une pompe conforme à l'invention, la coupe étant réalisée perpendiculairement à l'axe de rotation du rotor, et le rotor étant présenté dans une seconde position;- Figure 2 is a sectional view of a pump according to the invention, the section being made perpendicular to the axis of rotation of the rotor, and the rotor being presented in a second position;
- la figure 3 est une vue en coupe selon la ligne 3-3 de la figure 1 ; et- Figure 3 is a sectional view along line 3-3 of Figure 1; and
- la figure 4 est une vue en coupe axiale du rotor. - J- Figure 4 is an axial sectional view of the rotor. - J
L'invention concerne une pompe rotative utilisable comme pompe à vide pneumatique, comprenant essentiellement un stator I , un rotor 2, et deux palettes 3 et 4The invention relates to a rotary pump which can be used as a pneumatic vacuum pump, essentially comprising a stator I, a rotor 2, and two vanes 3 and 4.
Le stator 1 est percé d'un alésage 1 1 délimité par un fond 1 1 1 , et par un couvercle 1 12, et par une paroi latérale cylindrique 1 13 présentant un rayon relativement grand R|.The stator 1 is pierced with a bore 1 1 delimited by a bottom 1 1 1, and by a cover 1 12, and by a cylindrical side wall 1 13 having a relatively large radius R |.
Une entrée d'aspiration d'air 12 et une sortie d'évacuation d'air 13 débouchent dans le alésage 1 1An air intake inlet 12 and an air outlet outlet 13 open into the bore 1 1
Le rotor 2 est lui-même cylindrique, creux, disposé à l'intérieur de l'alésage 1 1 , en contact tangent et étanche avec ce dernier, et équipé d'un arbre d'entraînement coaxial 23 , l'arbre 23 traversant le fond 1 1 1 du stator et présentant un relief d'entraînement 24 accessible à l'extérieur de l'alésage, de manière à permettre l'entraînement du rotor en rotation autour d'un axe X, excentré par rapport au alésage 1 1.The rotor 2 is itself cylindrical, hollow, disposed inside the bore 1 1, in tangent and sealed contact with the latter, and equipped with a coaxial drive shaft 23, the shaft 23 passing through the base 1 1 1 of the stator and having a driving relief 24 accessible outside the bore, so as to allow the rotor to be driven in rotation about an axis X, eccentric relative to the bore 1 1.
Les deux palettes 3 et 4 sont identiques, logées à coulissement dans des logements radiaux respectifs 25, 26 du rotor, et solidaires en rotation de ce rotor, chaque palette présentant une largeur définie entre des premier et second bords 3 i , 32, 41 , 42, et ie premier étant en appui sur la paroi latérale I 13 de l'alésageThe two pallets 3 and 4 are identical, housed sliding in respective radial housings 25, 26 of the rotor, and integral in rotation with this rotor, each pallet having a width defined between first and second edges 3 i, 32, 41, 42, and ie the first being supported on the side wall I 13 of the bore
Cette pompe est dotée d'un circuit d'huile sous pression comprenant un canal 5 aménagé dans le fond de l'alésage et une gorge 6 creusée dans le rotor, communiquant à la fois avec le canal 5 et avec chaque logement radial 25, 26 pour amener de l'huile sous pression sur le second bord 32, 42 de chaque palette 3, 4This pump has a pressurized oil circuit comprising a channel 5 arranged in the bottom of the bore and a groove 6 hollowed out in the rotor, communicating both with channel 5 and with each radial housing 25, 26 for bringing pressurized oil to the second edge 32, 42 of each pallet 3, 4
Un cylindre 7, coaxial avec la paroi cylindrique 1 13 de l'alésage et présentant un rayon relativement petit Ro, pénètre dans le rotor, la largeur de chaque palette est sensiblement égale à la différence Ri - Ro entre le rayon relativement grand de la paroi latérale cylindrique 1 13, et le rayon relativement petit du cylindre 7 Dans ces conditions, chaque palette 3, 4 vient sélectivement en contact par son second bord 32, 42 avec le cylindre 7 et coopère avec lui pour former dans le rotor au moins une chambre de compression 8 et une chambre de dilatation 9, l'huile exerçant ainsi une poussée radiale centrifuge sur les palettes et étant forcée à circuler de la chambre de compression vers la chambre de dilatation.A cylinder 7, coaxial with the cylindrical wall 1 13 of the bore and having a relatively small radius Ro, enters the rotor, the width of each pallet is substantially equal to the difference Ri - Ro between the relatively large radius of the wall lateral cylindrical 1 13, and the relatively small radius of the cylinder 7 Under these conditions, each pallet 3, 4 selectively comes into contact via its second edge 32, 42 with the cylinder 7 and cooperates with it to form in the rotor at least one compression chamber 8 and an expansion chamber 9, the oil thus exerting a centrifugal radial thrust on the pallets and being forced to flow from the compression chamber to the expansion chamber.
Enfin, comme le montre la figure 3, le cylindre 7, coaxial avec la paroi cylindrique 1 13 de l'alésage, est de préférence solidaire du couvercle 1 12. Finally, as shown in FIG. 3, the cylinder 7, coaxial with the cylindrical wall 1 13 of the bore, is preferably secured to the cover 1 12.

Claims

REVENDICATIONS
1. Pompe rotative comprenant . un stator ( 1 ) percé d'un alésage ( 1 1 ) délimité par un fond ( 1 1 1), par un couvercle (1 12), et par une paroi latérale cylindrique (1 13) présentant un rayon relativement grand (Ri); un rotor cylindrique (2), disposé dans l'alésage ( 1 1), tangent à la paroi latérale cylindrique, et susceptible d'être entraîné en rotation autour d'un axe (X) excentré par rapport à cet alésage; au moins deux palettes identiques (3, 4) logées à coulissement dans des logements radiaux (25, 26) du rotor (2) et solidaires en rotation de ce rotor, chaque palette présentant une largeur définie entre des premier et second bords (31, 32, 41, 42) dont le premier (31, 41) est en appui sur la paroi latérale ( 1 13) de l'alésage; et un cylindre (7) coaxial avec la paroi cylindrique ( 1 13) de l'alésage et présentant un rayon relativement petit (Ro), la largeur de chaque palette (3, 4) étant sensiblement égale à la différence entre les rayons relativement grand et petit, caractérisée en ce qu'elle comprend un circuit d'huile sous pression comprenant lui-même un canal (5) aménagé dans le fond de l'alésage et une gorge (6) creusée dans le rotor, communiquant à la fois avec le canal (5) et avec chaque logement radial (25, 26) pour amener de l'huile sous pression sur le second bord (32, 42) de chaque palette, en ce que le rotor (2) est creux, et en ce que le cylindre (7) pénètre dans le rotor, ce dont ii résulte que chaque palette vient sélectivement en contact par son second bord avec le cylindre et coopère avec lui pour former dans le rotor au moins une chambre de compression (8) et une chambre de dilatation (9), l'huile exerçant ainsi une poussée radiale centrifuge sur les palettes et étant forcée à circuler de la chambre de compression vers la chambre de dilatation.1. Rotary pump including. a stator (1) pierced with a bore (1 1) delimited by a bottom (1 1 1), by a cover (1 12), and by a cylindrical side wall (1 13) having a relatively large radius (Ri) ; a cylindrical rotor (2), disposed in the bore (1 1), tangent to the cylindrical side wall, and capable of being rotated about an axis (X) eccentric with respect to this bore; at least two identical pallets (3, 4) slidingly housed in radial housings (25, 26) of the rotor (2) and integral in rotation with this rotor, each pallet having a width defined between first and second edges (31, 32, 41, 42) of which the first (31, 41) is supported on the side wall (1 13) of the bore; and a cylinder (7) coaxial with the cylindrical wall (1 13) of the bore and having a relatively small radius (Ro), the width of each pallet (3, 4) being substantially equal to the difference between the relatively large radii and small, characterized in that it comprises a pressurized oil circuit itself comprising a channel (5) arranged in the bottom of the bore and a groove (6) hollowed out in the rotor, communicating with both the channel (5) and with each radial housing (25, 26) for supplying pressurized oil to the second edge (32, 42) of each pallet, in that the rotor (2) is hollow, and in this that the cylinder (7) enters the rotor, which results in each pallet selectively coming into contact with its second edge with the cylinder and cooperating with it to form in the rotor at least one compression chamber (8) and one chamber expansion (9), the oil thus exerting a centrifugal radial thrust on the pallets and being forced to flow from the compression chamber to the expansion chamber.
2. Pompe rotative suivant la revendication 1 , caractérisée en ce que le cylindre (7) coaxial avec la paroi cylindrique de l'alésage est solidaire du couvercle (1 12) 2. Rotary pump according to claim 1, characterized in that the cylinder (7) coaxial with the cylindrical wall of the bore is integral with the cover (1 12)
PCT/EP1996/003942 1995-09-18 1996-09-09 Rotary vane pump WO1997011277A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69606315T DE69606315T2 (en) 1995-09-18 1996-09-09 WING CELL PUMP
EP96931052A EP0851980B1 (en) 1995-09-18 1996-09-09 Rotary vane pump
JP9512356A JPH11512506A (en) 1995-09-18 1996-09-09 Rotary pump with oil compression chamber

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95TO000737A IT1281346B1 (en) 1995-09-18 1995-09-18 ROTARY PUMP WITH OIL COMPRESSION CHAMBER
ITTO95A000737 1995-09-18

Publications (1)

Publication Number Publication Date
WO1997011277A1 true WO1997011277A1 (en) 1997-03-27

Family

ID=11413812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003942 WO1997011277A1 (en) 1995-09-18 1996-09-09 Rotary vane pump

Country Status (6)

Country Link
EP (1) EP0851980B1 (en)
JP (1) JPH11512506A (en)
DE (1) DE69606315T2 (en)
ES (1) ES2141532T3 (en)
IT (1) IT1281346B1 (en)
WO (1) WO1997011277A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1361365B1 (en) 1998-09-30 2005-08-10 Luk Automobiltechnik GmbH & Co. KG Vacuum pump and plastic rotor
JP6166671B2 (en) * 2014-02-21 2017-07-19 大豊工業株式会社 Vane pump

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026739A (en) * 1933-04-08 1936-01-07 James P Johnson Pump
GB480522A (en) * 1936-05-23 1938-02-23 Bendix Aviat Corp A new or improved rotary vacuum pump
FR1376713A (en) * 1963-09-17 1964-10-31 Development of rotary engines
US3187679A (en) * 1963-06-10 1965-06-08 Scognamillo Frank Rotary machine
JPS57159990A (en) * 1981-03-27 1982-10-02 Hitachi Ltd Movable vane type rotary compressor
US4493626A (en) * 1982-07-22 1985-01-15 Mitsubishi Denki Kabushiki Kaisha Auxiliary radially shifting mechanism for vanes in a pump of the vane type
JPS62170701A (en) * 1986-01-22 1987-07-27 Agency Of Ind Science & Technol Vane motor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2026739A (en) * 1933-04-08 1936-01-07 James P Johnson Pump
GB480522A (en) * 1936-05-23 1938-02-23 Bendix Aviat Corp A new or improved rotary vacuum pump
US3187679A (en) * 1963-06-10 1965-06-08 Scognamillo Frank Rotary machine
FR1376713A (en) * 1963-09-17 1964-10-31 Development of rotary engines
JPS57159990A (en) * 1981-03-27 1982-10-02 Hitachi Ltd Movable vane type rotary compressor
US4493626A (en) * 1982-07-22 1985-01-15 Mitsubishi Denki Kabushiki Kaisha Auxiliary radially shifting mechanism for vanes in a pump of the vane type
JPS62170701A (en) * 1986-01-22 1987-07-27 Agency Of Ind Science & Technol Vane motor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 10 (M - 658)<2857> 13 January 1988 (1988-01-13) *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 267 (M - 182)<1145> 25 December 1982 (1982-12-25) *

Also Published As

Publication number Publication date
ES2141532T3 (en) 2000-03-16
EP0851980B1 (en) 2000-01-19
EP0851980A1 (en) 1998-07-08
IT1281346B1 (en) 1998-02-18
DE69606315D1 (en) 2000-02-24
DE69606315T2 (en) 2000-05-18
ITTO950737A0 (en) 1995-09-18
ITTO950737A1 (en) 1997-03-18
JPH11512506A (en) 1999-10-26

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