EP0196469A1 - Electrically-driven fuel feed pump - Google Patents
Electrically-driven fuel feed pump Download PDFInfo
- Publication number
- EP0196469A1 EP0196469A1 EP86102686A EP86102686A EP0196469A1 EP 0196469 A1 EP0196469 A1 EP 0196469A1 EP 86102686 A EP86102686 A EP 86102686A EP 86102686 A EP86102686 A EP 86102686A EP 0196469 A1 EP0196469 A1 EP 0196469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- impeller
- casing
- shaft
- housing
- 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.)
- Granted
Links
Images
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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
-
- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
Definitions
- This invention relates to a fuel feed pump of the type comprising an electric motor, a pumping unit driven by this latter, and a casing for supporting said motor and unit.
- the pumping unit comprises substantially a housing in which an impeller is rotatably mounted for rotation by a shaft driven by the pump electric motor.
- This impeller can be of any structure, and can be for example of centrifugal type (ie provided with blades disposed on its most outer peripheral part) or of the roller type (ie provided with a plurality of rollers housed in suitable cavities provided in the most outer peripheral part of the impeller).
- the pumping unit is in the form of an actual unit separated from the other parts of the pump, in order to be able to test this unit separately from the complete pump and to be able if necessary to store it during the various pump production stages.
- this pumping unit is rather complicated because the impeller has to be supported in its housing by suitable pins or by a shaft, and means have to be provided for mechanically connecting the shaft driven by the electric motor to the pump impeller, these normally consisting of couplings, insertion joints or entrainment members of various types.
- pumps of the described type in which the pumping unit can be constructed separately from the other parts of the pump are constructionally rather complicated because of the large
- Koreover these pumps are usually arranged such that the fluid takes a precisely defined path between the low-pressure zone from which it is withdrawn and the high-pressure zone into which it is delivered, and they thus allow only one method of operation.
- This fluid path can for example be of the type in which the fluid flow traverses that compartment in the pump casing which also houses the electric motor, and thus the fluid inlet is provided in one end of this casing, discharge taking place at the opposite end (pumps in which the electric motor is wetted by the fluid); alternatively, the flow of the fluid pumped by the pump is kept completely separated from the zone in which the electric motor operates (pumps with dry motors).
- the overall object of the present invention is to provide an electrically-driven fuel feed pump of the initially stated type by which the described drawbacks are obviated.
- a further object of the invention is to provide a pump of the
- a further object of the invention is to provide a pump in which the impeller of the pumping unit is easily and immediately accessible from the outside of the pump.
- a fuel feed pump comprising an electric motor, a pumping unit driven by said electric motor, and a casing for supporting said motor and said unit, said pumping unit comprising a housing in which an impeller is rotatable for rotation by a shaft driven by said electric motor, characterised in that said pumping unit comprises for said impeller an annular support element rigid with said housing and provided with at least one cylindrical support surface arranged to engage with a corresponding cylindrical surface of said impeller in order to support the rotating impeller in said housing, said impeller and the end of said shaft being provided with insertion-joint means arranged to make said shaft torsionally rigid with said impeller.
- Said housing is fixed to one end of the casing in such a manner as to close the compartment defined inside this latter, and said annular support element comprises a sleeve which is forced into an axial bore of the housing, and of which the outer surface constitutes said cylindrical support surface.
- the insertion-joint means conveniently comprise a series of axial grooves
- the fuel feed pump according to the invention comprises substantially an electric motor, not shown in the figures for simplicity, for driving a shaft 1 and disposed in a casing 2 of any shape, for example cylindrical, and a pumping unit 3 to be driven by the shaft 1.
- the shaft 1 can be supported in the casing in any convenient manner and comprise bearings of any type.
- the pumping unit 3 comprises a housing 4 in which there is rotatable an impeller 5 which can be of any shape and comprise for example a plurality of blades disposed on the peripherally most outer part (centrifugal impeller) or a plurality of radial cavities in which rollers are housed (roller impeller).
- said housing comprises substantially a pair of flat plates 6 and 7 between which a spacer ring 8 is disposed. These parts, which are fixed together for example by screws 9, define substantially a cylindrical cavity 10 housing the impeller 5.
- the pumping unit comprises an annular support element 13 rigid with the housing 4 and provided with at least one cylindrical support surface 14 arranged to engage a corresponding cylindrical surface 15 of the impeller in order to support the rotating impeller in the housing.
- the support element 13 consists of a sleeve, the outer cylindrical surface of which is forced into the cylindrical surface 16 of an axial bore provided in the plate 6, as can be clearly seen in Figure 1.
- that cylindrical surface 15 of the impeller 5 which engages under rotation with the surface 14 of said sleeve is obtained by neans of a cylindrical cavity formed in the hub part of the impeller.
- the impeller 5 and the end 17 of the shaft 1 are provided with insertion-joint means able to make the shaft torsionally rigid with the impeller.
- These means comprise substantially a series of axial cavities 18 formed in a bore of the impeller 5, and a series of corresponding axial projections 19 provided on the end 17 of the shaft 1 and arranged to engage with the preceding.
- a conical seat 20 arranged to house a ball 21, which is interposed between said seat and a substantially flat surface 22 provided in a cavity of the plate 7. This ball is therefore able to act as a thrust bearing for the shaft 1, in order to support the axial loads transmitted to it which tend to displace the shaft towards the right in the figure.
- the plate is provided with a sleeve 23 projecting axially towards the pump electric notor, and inside which a bearing 24 can be housed to support the end 17 of the shaft 1.
- This bearing which can be of any suitable type, is inserted into the same cylindrical surface 16 into which the support element 13 is forced.
- the pumping unit 3 is connected to the pump casing 2 by fixing the plate 6 to one end of the casing in any suitable manner.
- This fixing can be carried out for example in the manner shown in Figure 1, by providing a shoulder 25 on the casing against which the plate 6 is rested, and then turning-over on to it the end edge 26 of the casing.
- a seal ring 27 is disposed between the plate and casing.
- the pumping unit 3 completely seals one end of the pump casing, and all its parts, with the exception of the plate 6, are external to the casing and completely accessible.
- Axial ports, 30 and 31 respectively, are conveniently provided in the plates 7 and 6 to allow the fuel to be fed into the cavity 10 of the pumping unit 3 and to be delivered under pressure from said cavity into the compartment 32 provided in the pump casing
- This constructional arrangement therefore provides a method of pump operation in which the fluid flow traverses the compartment 32 housing the motor, to wet the motor and leave from the other end of the pump.
- a further series of axial ports 33 provided in the plates 6 and 7 and in the spacer ring 8 enables the fuel to pass between the compartment 32 and the outside of the pump, along this path there being provided a pressure relief valve.
- the pumping unit of the embodiment shown in Figure 2 differs from the preceding only in the structure of the plate 7.
- This latter comprises at least two ports 34 and 35 arranged respectively to feed fuel into the cavity 10 and to deliver it under pressure fron said cavity to the user item.
- a further bore 36 connects together the two preceding ports, and along it there is disposed a pressure relief valve 37.
- ports are not provided in the plate 6, and thus the compartment 32 in the casing 2 housing the electric notor is completely separated from the fuel flow.
- a substantially cylindrical cavity 38 housing seal rings 39 arranged to form a hydraulic seal against the cylindrical surface of the end 17 of the shaft 1.
- Said rings can conveniently be of rubber, and be provided with radial lips which slide along said surface. These can be mounted in any convenient manner, for example against a shoulder of the support element 13, by using a spacer 40 and a stop ring 41.
- a radial bore 42 in communication with grooves 43 of the plate 6, in order to form a channel between the cavity lying between the seal rings 39 and the pump cavity 10.
- the construction and use of the described pump can be as follows.
- the pumping unit of any of the illustrated embodiments can be constructed separately from the other parts of the pump. For this purpose, it is necessary only to firstly mount the support element 13 in the bore 16 of the plate 6, then engage the impeller 5 with this support element, and finally fix the spacer ring 8 and the other plate 7 on to the plate 6 by means of the screws 9, to form the housing for the unit. It is apparent that in the pumping unit obtained in this manner the impeller 5 is supported correctly in the housing and perfectly coaxial to it.
- the pumping unit can be tested by using suitable drive neans, for example a shaft on the end of which axial projections are provided of the same type as those provided on the end 17 of the shaft 1, and able to engage the axial cavities 18 of the impeller 5.
- suitable drive neans for example a shaft on the end of which axial projections are provided of the same type as those provided on the end 17 of the shaft 1, and able to engage the axial cavities 18 of the impeller 5.
- the pumping unit thus prepared can be stored for use when the pump is to be completely assembled. For this latter, it is necessary only to mount the bearing 24 on the plate 6 of said unit, and fix the plate to the casing 2 in the manner shown in the figures.
- the end 17 of the shaft 1 is then inserted into the bearing and support element 13 until the axial projections 19 engage the corresponding axial cavities 18 of the impeller. This operation thus results simultaneously in the electric motor becoming mechanically connected to the impeller 5, one end of the shaft 1 becoming supported by the bearing 24, and one end of the pump casing 2 becoming sealed.
- any one of the pumping units of the embodiments of the illustrated figures can be constructed, to thus obtain a fuel flow which either completely traverses the pump or is entirely external to the compartment 32 housing the electric motor.
- the support element 13 provided with a cylindrical support surface 14 for the impeller 5 can be formed in a different manner.
- This surface could for example be provided directly on an annular projection projecting axially from the
- the insertion-joint means for torsionally connecting the end of the shaft 1 to the impeller 5 could be of a type different from those shown, and instead of comprising axial projections and cavities could comprise entrainment members of a different type, for example frontal teeth.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- This invention relates to a fuel feed pump of the type comprising an electric motor, a pumping unit driven by this latter, and a casing for supporting said motor and unit.
- In pumps of this type, the pumping unit comprises substantially a housing in which an impeller is rotatably mounted for rotation by a shaft driven by the pump electric motor. This impeller can be of any structure, and can be for example of centrifugal type (ie provided with blades disposed on its most outer peripheral part) or of the roller type (ie provided with a plurality of rollers housed in suitable cavities provided in the most outer peripheral part of the impeller).
- In certain pumps of this type, the pumping unit is in the form of an actual unit separated from the other parts of the pump, in order to be able to test this unit separately from the complete pump and to be able if necessary to store it during the various pump production stages. In such a case, this pumping unit is rather complicated because the impeller has to be supported in its housing by suitable pins or by a shaft, and means have to be provided for mechanically connecting the shaft driven by the electric motor to the pump impeller, these normally consisting of couplings, insertion joints or entrainment members of various types.
- Consequently, pumps of the described type in which the pumping unit can be constructed separately from the other parts of the pump are constructionally rather complicated because of the large
- number of component parts, and they require supplementary members for mechanically connecting the pumping unit to the electric motor.
- Koreover, these pumps are usually arranged such that the fluid takes a precisely defined path between the low-pressure zone from which it is withdrawn and the high-pressure zone into which it is delivered, and they thus allow only one method of operation. This fluid path can for example be of the type in which the fluid flow traverses that compartment in the pump casing which also houses the electric motor, and thus the fluid inlet is provided in one end of this casing, discharge taking place at the opposite end (pumps in which the electric motor is wetted by the fluid); alternatively, the flow of the fluid pumped by the pump is kept completely separated from the zone in which the electric motor operates (pumps with dry motors).
- Finally, in pumps of the indicated type, it is difficult to gain access to the pump impeller from the outside, and thus impeller setting or repair operations cannot be carried out.
- The overall object of the present invention is to provide an electrically-driven fuel feed pump of the initially stated type by which the described drawbacks are obviated.
- It is therefore a first object of the present invention to provide a pump comprising a constructionally very simple pumping unit which can be produced or tested separately from the other parts of the pump and can be mounted on this latter rapidly and simply.
- A further object of the invention is to provide a pump of the
- stated type which allows at least two different methods of operation, one with the fluid flow traversing the inner casing compartment and thus actually wetting the electric motor, and the other with the flow completely external to the pump to thus provide dry operation.
- A further object of the invention is to provide a pump in which the impeller of the pumping unit is easily and immediately accessible from the outside of the pump.
- These objects are attained according to the invention by a fuel feed pump comprising an electric motor, a pumping unit driven by said electric motor, and a casing for supporting said motor and said unit, said pumping unit comprising a housing in which an impeller is rotatable for rotation by a shaft driven by said electric motor, characterised in that said pumping unit comprises for said impeller an annular support element rigid with said housing and provided with at least one cylindrical support surface arranged to engage with a corresponding cylindrical surface of said impeller in order to support the rotating impeller in said housing, said impeller and the end of said shaft being provided with insertion-joint means arranged to make said shaft torsionally rigid with said impeller.
- Said housing is fixed to one end of the casing in such a manner as to close the compartment defined inside this latter, and said annular support element comprises a sleeve which is forced into an axial bore of the housing, and of which the outer surface constitutes said cylindrical support surface. The insertion-joint means conveniently comprise a series of axial grooves
- provided in an axial bore through the inpeller, and a series of axial projections formed on the end of the shaft and arranged to engage with said grooves.
- The present invention will be more apparent fron the detailed description thereof given hereinafter by way of example with reference to the accompanying drawings, in which:
- Figure 1 is an axial section through part of the pump according to the present invention, to illustrate the structure of the pumping unit with which the pump is provided;
- Figure 2 is a section analogous to that of the preceding figure, in which a second embodiment of the pumping unit is shown;
- Figure 3 is a section analogous to that of the preceding figures, and showing the pumping unit of Figure 2 in which some modifications have been introduced.
- The fuel feed pump according to the invention comprises substantially an electric motor, not shown in the figures for simplicity, for driving a shaft 1 and disposed in a
casing 2 of any shape, for example cylindrical, and apumping unit 3 to be driven by the shaft 1. - The shaft 1 can be supported in the casing in any convenient manner and comprise bearings of any type.
- The
pumping unit 3 comprises a housing 4 in which there is rotatable animpeller 5 which can be of any shape and comprise for example a plurality of blades disposed on the peripherally most outer part (centrifugal impeller) or a plurality of radial cavities in which rollers are housed (roller impeller). Conveniently, said housing comprises substantially a pair offlat plates 6 and 7 between which aspacer ring 8 is disposed. These parts, which are fixed together for example byscrews 9, define substantially acylindrical cavity 10 housing theimpeller 5. According to the invention, the pumping unit comprises anannular support element 13 rigid with the housing 4 and provided with at least onecylindrical support surface 14 arranged to engage a correspondingcylindrical surface 15 of the impeller in order to support the rotating impeller in the housing. Conveniently, thesupport element 13 consists of a sleeve, the outer cylindrical surface of which is forced into thecylindrical surface 16 of an axial bore provided in theplate 6, as can be clearly seen in Figure 1. Conveniently, thatcylindrical surface 15 of theimpeller 5 which engages under rotation with thesurface 14 of said sleeve is obtained by neans of a cylindrical cavity formed in the hub part of the impeller. - According to the invention, the
impeller 5 and theend 17 of the shaft 1 are provided with insertion-joint means able to make the shaft torsionally rigid with the impeller. These means comprise substantially a series ofaxial cavities 18 formed in a bore of theimpeller 5, and a series of correspondingaxial projections 19 provided on theend 17 of the shaft 1 and arranged to engage with the preceding. Conveniently, as can be seen in Figure 1, on theend 17 of the shaft 1 there is provided aconical seat 20 arranged to house aball 21, which is interposed between said seat and a substantiallyflat surface 22 provided in a cavity of the plate 7. This ball is therefore able to act as a thrust bearing for the shaft 1, in order to support the axial loads transmitted to it which tend to displace the shaft towards the right in the figure. - Conveniently, the plate is provided with a
sleeve 23 projecting axially towards the pump electric notor, and inside which abearing 24 can be housed to support theend 17 of the shaft 1. This bearing, which can be of any suitable type, is inserted into the samecylindrical surface 16 into which thesupport element 13 is forced. - The
pumping unit 3 is connected to thepump casing 2 by fixing theplate 6 to one end of the casing in any suitable manner. This fixing can be carried out for example in the manner shown in Figure 1, by providing ashoulder 25 on the casing against which theplate 6 is rested, and then turning-over on to it theend edge 26 of the casing. Conveniently, aseal ring 27 is disposed between the plate and casing. - Vith this constructional arrangement, the
pumping unit 3 completely seals one end of the pump casing, and all its parts, with the exception of theplate 6, are external to the casing and completely accessible. - Axial ports, 30 and 31 respectively, are conveniently provided in the
plates 7 and 6 to allow the fuel to be fed into thecavity 10 of thepumping unit 3 and to be delivered under pressure from said cavity into thecompartment 32 provided in the pump casing - 2. This constructional arrangement therefore provides a method of pump operation in which the fluid flow traverses the
compartment 32 housing the motor, to wet the motor and leave from the other end of the pump. Conveniently, a further series ofaxial ports 33 provided in theplates 6 and 7 and in thespacer ring 8 enables the fuel to pass between thecompartment 32 and the outside of the pump, along this path there being provided a pressure relief valve. - The pumping unit of the embodiment shown in Figure 2 differs from the preceding only in the structure of the plate 7. This latter comprises at least two
ports cavity 10 and to deliver it under pressure fron said cavity to the user item. Conveniently, afurther bore 36 connects together the two preceding ports, and along it there is disposed apressure relief valve 37. In this embodiment, ports are not provided in theplate 6, and thus thecompartment 32 in thecasing 2 housing the electric notor is completely separated from the fuel flow. - In the embodiment shown in Figure 3, which constitutes a modification of that of Figure 2, inside the
support element 13 there is provided a substantiallycylindrical cavity 38 housing seal rings 39 arranged to form a hydraulic seal against the cylindrical surface of theend 17 of the shaft 1. Said rings can conveniently be of rubber, and be provided with radial lips which slide along said surface. These can be mounted in any convenient manner, for example against a shoulder of thesupport element 13, by using a spacer 40 and a stop ring 41. - Conveniently, in the
support element 13 there is provided aradial bore 42 in communication withgrooves 43 of theplate 6, in order to form a channel between the cavity lying between the seal rings 39 and thepump cavity 10. In this Banner, any fuel which seeps beyond the first seal ring can be conveyed into the pump suction zone by the suction action exerted by it. This constructional arrangement enables the pressure by which the seal rings 39 are forced against theend 17 of the shaft to be reduced, thus reducing mechanical wear losses. - The construction and use of the described pump can be as follows. The pumping unit of any of the illustrated embodiments can be constructed separately from the other parts of the pump. For this purpose, it is necessary only to firstly mount the
support element 13 in thebore 16 of theplate 6, then engage theimpeller 5 with this support element, and finally fix thespacer ring 8 and the other plate 7 on to theplate 6 by means of thescrews 9, to form the housing for the unit. It is apparent that in the pumping unit obtained in this manner theimpeller 5 is supported correctly in the housing and perfectly coaxial to it. Under these conditions, the pumping unit can be tested by using suitable drive neans, for example a shaft on the end of which axial projections are provided of the same type as those provided on theend 17 of the shaft 1, and able to engage theaxial cavities 18 of theimpeller 5. - The pumping unit thus prepared can be stored for use when the pump is to be completely assembled. For this latter, it is necessary only to mount the
bearing 24 on theplate 6 of said unit, and fix the plate to thecasing 2 in the manner shown in the figures. Theend 17 of the shaft 1 is then inserted into the bearing andsupport element 13 until theaxial projections 19 engage the correspondingaxial cavities 18 of the impeller. This operation thus results simultaneously in the electric motor becoming mechanically connected to theimpeller 5, one end of the shaft 1 becoming supported by thebearing 24, and one end of thepump casing 2 becoming sealed. - Using the described assembly method, any one of the pumping units of the embodiments of the illustrated figures can be constructed, to thus obtain a fuel flow which either completely traverses the pump or is entirely external to the
compartment 32 housing the electric motor. - If a pump arranged for operation by one of the two operating methods is to be converted into the other, it is necessary only to replace the plate 7 by separating this from the other parts by unscrewing the
screws 9. This replacement operation is extremely rapid and simple, because of the couplete accessibility of the parts on which work has to be done. - It is also apparent that on separating the plate 7 from the other parts of the housing 4, access is gained to the
impeller 5 to enable checking or maintenance operations to be carried out on it. - It is apparent that modifications can be made to the various parts of the described pump in terms both of their shape and arrangement, but without leaving the scope of the inventive idea. In particular, the
support element 13 provided with acylindrical support surface 14 for theimpeller 5 can be formed in a different manner. This surface could for example be provided directly on an annular projection projecting axially from the -
circular plate 6, or by providing asupport element 13 which is of a shape different from that illustrated and is connected to the plate by a different method. Instead of being connected to theplate 6, this support element could be connected to the plate 7 by obvious structural modifications. - Furthermore, the insertion-joint means for torsionally connecting the end of the shaft 1 to the
impeller 5 could be of a type different from those shown, and instead of comprising axial projections and cavities could comprise entrainment members of a different type, for example frontal teeth.
Claims (14)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT67281/85A IT1184924B (en) | 1985-03-22 | 1985-03-22 | ELECTRICALLY OPERATED FUEL PUMP |
IT6728185 | 1985-03-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0196469A1 true EP0196469A1 (en) | 1986-10-08 |
EP0196469B1 EP0196469B1 (en) | 1990-02-07 |
Family
ID=11301109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86102686A Expired EP0196469B1 (en) | 1985-03-22 | 1986-03-01 | Electrically-driven fuel feed pump |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0196469B1 (en) |
BR (1) | BR8601540A (en) |
DE (1) | DE3668952D1 (en) |
ES (1) | ES8701903A1 (en) |
IT (1) | IT1184924B (en) |
SU (1) | SU1512493A3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0273386A2 (en) * | 1986-12-30 | 1988-07-06 | WEBER S.r.l. | Electric fuel pump |
EP0297147A1 (en) * | 1987-06-23 | 1989-01-04 | Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung | Internal gear pump as a lubrication pump |
EP0507512A1 (en) * | 1991-04-02 | 1992-10-07 | Concentric Pumps Limited | Oil pumps |
WO2004033915A1 (en) * | 2002-10-10 | 2004-04-22 | Compair Uk Limited | Rotary compressor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565550A (en) * | 1968-12-10 | 1971-02-23 | Worthington Corp | Compressor and pump combination |
FR2220688A1 (en) * | 1973-03-09 | 1974-10-04 | Rondolino Giorgio | |
DE3152000A1 (en) * | 1980-12-27 | 1982-08-19 | Aisan Kogyo K.K., Obu, Aichi | ELECTRICALLY OPERATED LIQUID PUMP |
US4496297A (en) * | 1981-06-02 | 1985-01-29 | Mitsubishi Denki Kabushiki Kaisha | Rotary vane pump with overlapping rotor and housing portions |
-
1985
- 1985-03-22 IT IT67281/85A patent/IT1184924B/en active
-
1986
- 1986-03-01 EP EP86102686A patent/EP0196469B1/en not_active Expired
- 1986-03-01 DE DE8686102686T patent/DE3668952D1/en not_active Expired - Fee Related
- 1986-03-21 SU SU864027199A patent/SU1512493A3/en active
- 1986-03-21 ES ES553281A patent/ES8701903A1/en not_active Expired
- 1986-03-24 BR BR8601540A patent/BR8601540A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565550A (en) * | 1968-12-10 | 1971-02-23 | Worthington Corp | Compressor and pump combination |
FR2220688A1 (en) * | 1973-03-09 | 1974-10-04 | Rondolino Giorgio | |
DE3152000A1 (en) * | 1980-12-27 | 1982-08-19 | Aisan Kogyo K.K., Obu, Aichi | ELECTRICALLY OPERATED LIQUID PUMP |
US4496297A (en) * | 1981-06-02 | 1985-01-29 | Mitsubishi Denki Kabushiki Kaisha | Rotary vane pump with overlapping rotor and housing portions |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0273386A2 (en) * | 1986-12-30 | 1988-07-06 | WEBER S.r.l. | Electric fuel pump |
EP0273386A3 (en) * | 1986-12-30 | 1989-10-04 | WEBER S.r.l. | Electric fuel pump |
EP0297147A1 (en) * | 1987-06-23 | 1989-01-04 | Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung | Internal gear pump as a lubrication pump |
EP0507512A1 (en) * | 1991-04-02 | 1992-10-07 | Concentric Pumps Limited | Oil pumps |
WO2004033915A1 (en) * | 2002-10-10 | 2004-04-22 | Compair Uk Limited | Rotary compressor |
Also Published As
Publication number | Publication date |
---|---|
EP0196469B1 (en) | 1990-02-07 |
ES553281A0 (en) | 1986-12-01 |
ES8701903A1 (en) | 1986-12-01 |
SU1512493A3 (en) | 1989-09-30 |
BR8601540A (en) | 1986-12-09 |
IT8567281A1 (en) | 1986-09-22 |
IT8567281A0 (en) | 1985-03-22 |
IT1184924B (en) | 1987-10-28 |
DE3668952D1 (en) | 1990-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3796526A (en) | Screw compressor | |
EP0601751B1 (en) | Electric-motor in-line integrated hydraulic pump | |
US2809590A (en) | Electric motor driven pump | |
US3031973A (en) | Centrifugal pump with canned motor | |
US3941506A (en) | Rotor assembly | |
US6022198A (en) | Twin pump with a charging pump | |
US8016571B2 (en) | Thrust and intake chamber for pump | |
EP0560466A3 (en) | Centrifugal blood pump and motor drive | |
US2830541A (en) | Fluid bearing for a tubular rotating shaft | |
CA2013132A1 (en) | Pump for and method of separating gas from a fluid to be pumped | |
US4255095A (en) | Turbopump | |
US20130183137A1 (en) | Centrifugal pump with secondary impeller and dual outlets | |
WO1994004827A1 (en) | Multi-stage centrifugal pump incorporating a sealed thrust bearing | |
US4190395A (en) | Multiple stage pump | |
EP0196469A1 (en) | Electrically-driven fuel feed pump | |
JP2001027195A (en) | Vacuum pump | |
US4375291A (en) | Back-up mechanical seal | |
GB2023739A (en) | Rotary positive-displacement fluid-machines | |
SE518871C2 (en) | Plan Sealing arrangements | |
MY103124A (en) | Wobble plate type compressor | |
EP0883749B1 (en) | Compressor | |
US3992131A (en) | Low speed pump | |
GB1349903A (en) | High pressure centrifugal pump assembly | |
GB773827A (en) | Improvements in motor driven pumps | |
EP1081387A3 (en) | Vacuum pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB NL SE |
|
17P | Request for examination filed |
Effective date: 19870318 |
|
17Q | First examination report despatched |
Effective date: 19880530 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WEBER S.R.L. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB NL SE |
|
REF | Corresponds to: |
Ref document number: 3668952 Country of ref document: DE Date of ref document: 19900315 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19900323 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19900328 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19900331 Year of fee payment: 5 Ref country code: GB Payment date: 19900331 Year of fee payment: 5 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19900525 Year of fee payment: 5 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19910301 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19910302 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19911001 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19911129 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19920101 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 86102686.2 Effective date: 19911009 |