EP1485620A1 - Variable-delivery rotary vane pump - Google Patents

Variable-delivery rotary vane pump

Info

Publication number
EP1485620A1
EP1485620A1 EP03739639A EP03739639A EP1485620A1 EP 1485620 A1 EP1485620 A1 EP 1485620A1 EP 03739639 A EP03739639 A EP 03739639A EP 03739639 A EP03739639 A EP 03739639A EP 1485620 A1 EP1485620 A1 EP 1485620A1
Authority
EP
European Patent Office
Prior art keywords
vane
oscillating
rotary pump
end portion
groove
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP03739639A
Other languages
German (de)
French (fr)
Inventor
Giacomo Armenio
Luca Marano
Carlo Pachetti
Daniele Righetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg Pump Technology Italy SpA
Original Assignee
Pierburg SpA
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 Pierburg SpA filed Critical Pierburg SpA
Publication of EP1485620A1 publication Critical patent/EP1485620A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/32—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members
    • F04C2/332—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in groups F04C2/02 and relative reciprocation between co-operating members with vanes hinged to the outer member and reciprocating with respect to the inner member
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/348—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the vanes positively engaging, with circumferential play, an outer rotatable member

Definitions

  • the present invention relates to a variable-delivery rotary vane pump, particularly for oil, and which may be used to advantage for automotive applications .
  • the present invention relates to a rotary vane pump of the type comprising a casing; an adjustable stator; and a rotation unit in turn comprising an outer rotor and an inner rotor, between which are interposed a number of vanes.
  • this type of pump is halfway between a gear pump and a vane pump.
  • it substantially comprises two rotary members, one rotated by the other by means of teeth, so that the fluid between two meshing teeth is subjected to suction, on one side of the center line through the arc of contact, and to thrust on the other side.
  • a vane pump By varying the eccentricity of the two rotary members, a vane pump, on the other hand, as is known, provides for varying delivery between zero and a maximum value .
  • the type of pump considered in the present invention is defined by a combination of two rotors - one outer and one inner - rotating about more or less eccentric axes with a series of oscillating vanes and one vane integral with the outer rotor.
  • the object of the vane integral with the outer rotor is to transmit motion between the inner and outer rotor, and so rotate all the other oscillating vanes; each oscillating vane, as it rotates, penetrates a respective seat on the other rotor with a given clearance; and both the oscillating vanes and the one integral with the outer rotor contribute in defining honeycomb spaces, the variation in volume of which, as the two rotors rotate, generates the desired pumping effect.
  • variable-delivery rotary vane pump as claimed in Claim 1.
  • Figure 1 shows a cross section of the rotary pump according to the present invention
  • Figure 2 shows a longitudinal section A-A of the Figure 1 cross section
  • Figure 3 shows an enlarged view of details of the Figure 1 and 2 rotary pump.
  • number 10 indicates a rotary pump in accordance with the present invention.
  • Rotary pump 10 comprises a casing 11, in which is defined a cavity 12 having a portion 12a and a supporting surface 12b for the reasons explained in detail later on.
  • Cavity 12 also comprises a seat 12c for housing a spring device 13 used as described later on.
  • Cavity 12 also houses an adjustable oscillating stator 14 having a substantially annular section.
  • stator 14 comprises a portion 14a, which mates perfectly with portion 12a of cavity 12 to allow stator 14 to rotate about an axis perpendicular to the Figure 1 plane and through a center CI.
  • oscillating stator 14 Since, as stated, oscillating stator 14 has a portion 14a mating perfectly with a corresponding portion 12a of inner cavity 12 of casing 11 with no need for intermediate members, such as pins or articulated joints, oscillating stator 14 is fitted more easily to casing 11.
  • Stator 14 also comprises a first shoulder 14b, which may rest on supporting surface 12b in cavity 12, and a second shoulder 14c resting on spring device 13.
  • Rotor assembly 16 comprises, in known manner, an outer rotor 17, the outer surface 17a of which mates with the surface 15a of cavity 15; and an inner rotor 18, which is also substantially circular (in section) .
  • the outer surface 18a of inner rotor 18 and the inner surface 17b of outer rotor 17 define a pumping space 19.
  • outer rotor 17 rotates about an axis 20 (center C2 in Figure 1)
  • inner rotor 18 rotates about an axis 21 (center C3 in Figure 1) which is eccentric with respect to axis 20.
  • Pumping action is performed entirely by a drive shaft (not shown) fitted with inner rotor 18 and rotated by a motor (not shown) .
  • Rotor assembly 16 also comprises a number of - in the embodiment shown, four - oscillating vanes 22 in known manner,- and, in addition to oscillating vanes 22, a vane 40 integral with outer rotor 17.
  • Pumping space 19 is therefore divided into five pumping pockets 23, each defined by two adjacent vanes 22 or 22 and 40. As shown in more detail in Figure 3, five grooves 24 are formed in inner rotor 18.
  • vane 22 can be divided ideally into three portions 22a, 22b, 22c ( Figure 3) .
  • a first end portion 22a of vane 22 slides inside groove 24, which is a dead groove.
  • a second end portion 22b of vane 22 is housed inside a seat 28 formed in outer rotor 17 ( Figure 3) .
  • End portions 22a, 22b are substantially cylindrical, as is a portion 40a of vane 40.
  • second end portion 22b Given the particular substantially cylindrical shape of second end portion 22b and respective seat 28 in which it is housed, second end portion 22b therefore rotates about an axis which extends outside the Figure 1 and 3 planes, and which, in said planes, is indicated C4 ( Figure 3) .
  • the two end portions 22a, 22b are joined by a substantially rectangular-section central portion 22c, to achieve the best definition of pockets 23 and reduce slide between the sides of vanes 22 and grooves 24 with any eccentricity, i.e. any distance between axes 20, 21.
  • Vane 40 in turn comprises two end portions 40a, 40b joined by a substantially rectangular-section central connecting portion 40c ( Figure 1) ; end portion 40a is housed inside corresponding groove 24; and end portion 40b is integral with outer rotor 17. More specifically, in the embodiment shown in Figure 1, end portion 40b is formed in one piece with outer rotor 17.
  • Oscillating vanes 22 are designed so as not to interfere with the drive shaft of axis 21.
  • the motion of each vane 22, in fact, is confined within respective groove 24, so that the pump can be mounted coaxially with the drive shaft (axis 21) .
  • each vane 22 contacting the surface of respective groove 24 are so designed that only end portion 22a, and not intermediate portion 22c, contacts groove 24.
  • Figures 1 and 2 show a suction opening 29, a delivery opening 30, and a lid 31 ( Figure 2) .
  • each groove 24 has an opening 27 for correct oil drainage from groove 24 during the movement of vane 22, 40.
  • a chamber 34 ( Figure 1) is provided between casing 11 and stator 14, and into which part of the oil delivery, i.e. from delivery opening 30, is fed.
  • chamber 34 contains a certain amount of fluid, in particular oil, of the same pressure as the oil from delivery opening 30.
  • rotary pump 10 supplies a delivery ranging between zero and a maximum value.
  • Oil delivery is obviously maximum when the eccentricity of outer rotor 17 with respect to inner rotor 18, i.e. the distance between axis 20 and axis 21 (between C2 and C3), is maximum.
  • variable-delivery rotary vane pump As such, no pumping action is wasted on surplus oil which would have to be bypassed later, thus greatly improving efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

A variable-delivery rotary pump (10) having a number of oscillating vanes (22), and a further vane (40) fixed integrally to the outer rotor (17) which further vane (40) also rotates the outer rotor (17) to ensure continuous motion.

Description

VARIABLE-DELIVERY ROTARY VANE PUMP
TECHNICAL FIELD The present invention relates to a variable-delivery rotary vane pump, particularly for oil, and which may be used to advantage for automotive applications .
More specifically, the present invention relates to a rotary vane pump of the type comprising a casing; an adjustable stator; and a rotation unit in turn comprising an outer rotor and an inner rotor, between which are interposed a number of vanes.
In a way, this type of pump is halfway between a gear pump and a vane pump. In fact, like a gear pump, it substantially comprises two rotary members, one rotated by the other by means of teeth, so that the fluid between two meshing teeth is subjected to suction, on one side of the center line through the arc of contact, and to thrust on the other side.
By varying the eccentricity of the two rotary members, a vane pump, on the other hand, as is known, provides for varying delivery between zero and a maximum value .
BACKGROUND ART
In conventional applications, however, the vanes, as they rotate, are subjected to centrifugal force, which alone ensures contact between the vane tip and stator, and therefore sealing between the various pump compartments .
As a result, at low rotation speed, at which the centrifugal force is also low, considerable oil leakage occurs between adjacent compartments, thus impairing volumetric efficiency and, consequently, delivery.
Conversely, the strong centrifugal force produced at high rotation speed results in considerable contact pressure between the vane tip and stator, thus resulting in severe wear of the vanes and the inner surface of the stator.
To eliminate the above drawbacks, a special oscillating vane has been devised with a specially contoured outer profile designed to mate perfectly with the walls of the respective seat. One solution of this type is described and claimed in German Patent DE-C1-195 32 703, in which motion is transmitted between the outer and inner rotor exclusively by the oscillating vanes. To ensure continuous motion, this solution calls for a large number of vanes; and the contact profile between each oscillating vane and the respective seat is only improved for one eccentricity value, whereas, for the others, operation of the pump is less than optimum. The type of pump considered in the present invention is defined by a combination of two rotors - one outer and one inner - rotating about more or less eccentric axes with a series of oscillating vanes and one vane integral with the outer rotor. The object of the vane integral with the outer rotor is to transmit motion between the inner and outer rotor, and so rotate all the other oscillating vanes; each oscillating vane, as it rotates, penetrates a respective seat on the other rotor with a given clearance; and both the oscillating vanes and the one integral with the outer rotor contribute in defining honeycomb spaces, the variation in volume of which, as the two rotors rotate, generates the desired pumping effect. DISCLOSURE OF INVENTION
It is therefore an object of the present invention to provide a rotary pump, in particular for oil and automotive applications, designed to eliminate the aforementioned drawbacks. To do which, as will be seen later on, the innovative solution according to the present invention also provides for a vane integral with the outer rotor.
According to the present invention, there is provided a variable-delivery rotary vane pump as claimed in Claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
Figure 1 shows a cross section of the rotary pump according to the present invention;
Figure 2 shows a longitudinal section A-A of the Figure 1 cross section;
Figure 3 shows an enlarged view of details of the Figure 1 and 2 rotary pump.
BEST MODE FOR CARRYING OUT THE INVENTION
With reference to Figures 1 and 2, number 10 indicates a rotary pump in accordance with the present invention.
Rotary pump 10 comprises a casing 11, in which is defined a cavity 12 having a portion 12a and a supporting surface 12b for the reasons explained in detail later on. Cavity 12 also comprises a seat 12c for housing a spring device 13 used as described later on.
Cavity 12 also houses an adjustable oscillating stator 14 having a substantially annular section.
More specifically, stator 14 comprises a portion 14a, which mates perfectly with portion 12a of cavity 12 to allow stator 14 to rotate about an axis perpendicular to the Figure 1 plane and through a center CI.
Since, as stated, oscillating stator 14 has a portion 14a mating perfectly with a corresponding portion 12a of inner cavity 12 of casing 11 with no need for intermediate members, such as pins or articulated joints, oscillating stator 14 is fitted more easily to casing 11.
Stator 14 also comprises a first shoulder 14b, which may rest on supporting surface 12b in cavity 12, and a second shoulder 14c resting on spring device 13.
A circular cavity 15 housing a rotor assembly 16 is defined inside stator 14. Rotor assembly 16 comprises, in known manner, an outer rotor 17, the outer surface 17a of which mates with the surface 15a of cavity 15; and an inner rotor 18, which is also substantially circular (in section) . The outer surface 18a of inner rotor 18 and the inner surface 17b of outer rotor 17 define a pumping space 19.
As shown in Figures 1 and 2, outer rotor 17 rotates about an axis 20 (center C2 in Figure 1) , while inner rotor 18 rotates about an axis 21 (center C3 in Figure 1) which is eccentric with respect to axis 20. Pumping action is performed entirely by a drive shaft (not shown) fitted with inner rotor 18 and rotated by a motor (not shown) .
Rotor assembly 16 also comprises a number of - in the embodiment shown, four - oscillating vanes 22 in known manner,- and, in addition to oscillating vanes 22, a vane 40 integral with outer rotor 17.
Pumping space 19 is therefore divided into five pumping pockets 23, each defined by two adjacent vanes 22 or 22 and 40. As shown in more detail in Figure 3, five grooves 24 are formed in inner rotor 18.
More specifically, vane 22 can be divided ideally into three portions 22a, 22b, 22c (Figure 3) . A first end portion 22a of vane 22 slides inside groove 24, which is a dead groove.
A second end portion 22b of vane 22 is housed inside a seat 28 formed in outer rotor 17 (Figure 3) . End portions 22a, 22b are substantially cylindrical, as is a portion 40a of vane 40.
Given the particular substantially cylindrical shape of second end portion 22b and respective seat 28 in which it is housed, second end portion 22b therefore rotates about an axis which extends outside the Figure 1 and 3 planes, and which, in said planes, is indicated C4 (Figure 3) .
In the embodiment shown in the accompanying drawings, the two end portions 22a, 22b are joined by a substantially rectangular-section central portion 22c, to achieve the best definition of pockets 23 and reduce slide between the sides of vanes 22 and grooves 24 with any eccentricity, i.e. any distance between axes 20, 21.
Vane 40 in turn comprises two end portions 40a, 40b joined by a substantially rectangular-section central connecting portion 40c (Figure 1) ; end portion 40a is housed inside corresponding groove 24; and end portion 40b is integral with outer rotor 17. More specifically, in the embodiment shown in Figure 1, end portion 40b is formed in one piece with outer rotor 17.
Oscillating vanes 22 are designed so as not to interfere with the drive shaft of axis 21. The motion of each vane 22, in fact, is confined within respective groove 24, so that the pump can be mounted coaxially with the drive shaft (axis 21) .
The surfaces of each vane 22 contacting the surface of respective groove 24 are so designed that only end portion 22a, and not intermediate portion 22c, contacts groove 24.
Figures 1 and 2 show a suction opening 29, a delivery opening 30, and a lid 31 (Figure 2) .
As shown in Figures 1 and 3 , each groove 24 has an opening 27 for correct oil drainage from groove 24 during the movement of vane 22, 40.
A chamber 34 (Figure 1) is provided between casing 11 and stator 14, and into which part of the oil delivery, i.e. from delivery opening 30, is fed. In other words, chamber 34 contains a certain amount of fluid, in particular oil, of the same pressure as the oil from delivery opening 30.
In actual use, by varying the distance between center C2 and center C3 (which is fixed) , by the user moving stator 14 and associated outer rotor 17 using known means (not shown) , rotary pump 10 supplies a delivery ranging between zero and a maximum value.
Oil delivery is obviously maximum when the eccentricity of outer rotor 17 with respect to inner rotor 18, i.e. the distance between axis 20 and axis 21 (between C2 and C3), is maximum.
Once the desired oil delivery is established at low speed of the motor (not shown) , an increase in the speed of the motor increases delivery and pressure in known manner, and therefore also the pressure in chamber 34.
The increase in pressure in chamber 34 produces a force which pushes shoulder 14c onto spring device 13 , thus reducing eccentricity (the distance between C2 and C3) and retroactively reducing oil delivery.
As such, no pumping action is wasted on surplus oil which would have to be bypassed later, thus greatly improving efficiency. The advantages of the variable-delivery rotary vane pump according to the present invention are as follows:
- high degree of efficiency at low speed, by sealing of the pumping pockets no longer depending on centrifugal force, as in known solutions; - no wear of the vane tips contacting the stator,-
- small size of vanes 22, so that the pump can be mounted coaxially with the drive shaft;
- easy-to-make device for controlling movement of the oscillating stator 14, which, by virtue of surface 14a, mates perfectly with the corresponding surface 12a of casing 11, with no need for additional intermediate members, such as pins or articulated joints,-
- optimum contact between the profile of each vane 22 and respective groove 24 over the whole eccentricity range,- and fewer vanes 22, by continuous motion being guaranteed by fixed vane 40, which, in addition to defining pumping pockets 23, together with vanes 22, also provides for rotating outer rotor 17

Claims

1) A variable-delivery rotary pump (10) with oscillating vanes (22) , of the type comprising a casing (11); an adjustable oscillating stator (14); and a rotation unit (16) , in turn comprising an outer rotor (17) and an inner rotor (18) , between which are interposed a number of said oscillating vanes (22) defining a corresponding number of pumping pockets (23) ,- a first end portion (22a) of each of said oscillating vanes (22) being inserted inside a respective groove (24) formed in a first rotor (17, 18) ,- and a second end portion (22b) of each of said oscillating vanes (22) being hinged inside a respective seat (28) formed in a second rotor (18, 17) , so that each oscillating vane (22) rotates about a hinge axis of center (C4) ,- the variable-delivery rotary pump (10) being characterized by comprising a further vane (40) fixed integrally to said first (17, 18) or second (18, 17) rotor,- said further vane (40) rotating the other rotor (17, 18) to ensure continuous motion.
2) A rotary pump (10) as claimed in Claim 1, wherein said groove (24) is formed in said inner rotor (18) , and said seat (28) is formed in said outer rotor (17) .
3) A rotary pump (10) as claimed in any one of the foregoing Claims, wherein said further vane (40) comprises a first and a second end portion (40a, 40b) joined by a central connecting portion (40c) ,- said first end portion (40a) being housed inside one of the grooves (24) , and said second end portion (40b) being integral with the outer rotor (17) . 4) A rotary pump (10) as claimed in any one of the foregoing Claims, wherein each groove (24) allows the first end portion (22a) of the relative oscillating vane (22) to slide freely inside it, so that the oscillating vane (22) does not interfere with a drive shaft having an axis (21) , thus enabling the rotation unit (16) , stator (14) , and casing (11) to be mounted coaxially with said axis (21) .
5) A rotary pump (10) as claimed in Claim 4, wherein the contact surfaces of each oscillating vane (22) and the surface of the respective groove (24) are so formed that only the first end portion (22a) of the oscillating vane (22) contacts the surface of said groove (24) .
6) A rotary pump (10) as claimed in Claim 5, wherein said first and said second end portion (22a, 22b) of said oscillating vane (22) are substantially cylindrical, so as to achieve optimum contact between the first end portion (22a) and the respective groove (24) over the whole eccentricity range (distance between C2 and C3) of the rotary pump (10) . 7) A rotary pump (10) as claimed in any one of the foregoing Claims, wherein each groove (24) has an opening (27) for draining the pumped fluid from the groove (24) during the movement of the relative vane (22, 40) inside the groove .
8) A rotary pump (10) as claimed in any one of the foregoing Claims, wherein the oscillating stator (14) has a surface portion (14a) which mates perfectly with a corresponding portion (12a) of a cavity (12) inside the casing (11) with no need for intermediate members, such as pins or articulated joints.
EP03739639A 2002-02-15 2003-02-14 Variable-delivery rotary vane pump Withdrawn EP1485620A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITBO20020075 2002-02-15
IT2002BO000075A ITBO20020075A1 (en) 2002-02-15 2002-02-15 VARIABLE FLOW ROTARY VANE PUMP, PARTICULARLY FOR OIL
PCT/IT2003/000075 WO2003069161A1 (en) 2002-02-15 2003-02-14 Variable-delivery rotary vane pump

Publications (1)

Publication Number Publication Date
EP1485620A1 true EP1485620A1 (en) 2004-12-15

Family

ID=11439906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03739639A Withdrawn EP1485620A1 (en) 2002-02-15 2003-02-14 Variable-delivery rotary vane pump

Country Status (4)

Country Link
EP (1) EP1485620A1 (en)
AU (1) AU2003209706A1 (en)
IT (1) ITBO20020075A1 (en)
WO (1) WO2003069161A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101116511B1 (en) 2011-10-05 2012-02-28 이병록 Air vane motor having liners
US10030655B2 (en) * 2013-09-24 2018-07-24 Aisin Seiki Kabushiki Kaisha Oil pump
JP6295923B2 (en) * 2014-11-12 2018-03-20 アイシン精機株式会社 Oil pump
WO2016198091A1 (en) * 2015-06-08 2016-12-15 Pierburg Pump Technology Gmbh Variable pendulum slider lubrication pump
CN106401950B (en) * 2016-11-09 2018-12-18 浙江科博达工业有限公司 Blade hinge piston combined type variable-displacement pump

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
FR875386A (en) * 1939-09-04 1942-09-18 Audi Ag Pump for delivering liquids
FR980766A (en) * 1943-02-26 1951-05-17 Oscillating Allergies Pump
DE4434430C2 (en) * 1994-09-27 1998-12-17 Guenther Dipl Ing Beez Adjustable hydraulic pendulum slide machine
DE19532703C1 (en) * 1995-09-05 1996-11-21 Guenther Beez Pump or hydraulic motor with inner and outer rotors
DE19915738A1 (en) * 1999-04-08 2000-10-12 Bayerische Motoren Werke Ag Variable-speed vane pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03069161A1 *

Also Published As

Publication number Publication date
WO2003069161A1 (en) 2003-08-21
WO2003069161A8 (en) 2004-04-08
AU2003209706A1 (en) 2003-09-04
ITBO20020075A1 (en) 2003-08-18
ITBO20020075A0 (en) 2002-02-15

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