EP2852760B1 - Pompe rotative volumétrique sans pulsation - Google Patents

Pompe rotative volumétrique sans pulsation Download PDF

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Publication number
EP2852760B1
EP2852760B1 EP13726269.7A EP13726269A EP2852760B1 EP 2852760 B1 EP2852760 B1 EP 2852760B1 EP 13726269 A EP13726269 A EP 13726269A EP 2852760 B1 EP2852760 B1 EP 2852760B1
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EP
European Patent Office
Prior art keywords
pump
rotor
pistons
stator
cam
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.)
Active
Application number
EP13726269.7A
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German (de)
English (en)
French (fr)
Other versions
EP2852760A1 (fr
Inventor
Thierry Navarro
Florent Junod
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.)
Swissinnov Product SARL
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Swissinnov Product SARL
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Publication date
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Publication of EP2852760A1 publication Critical patent/EP2852760A1/fr
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Publication of EP2852760B1 publication Critical patent/EP2852760B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/047—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F04B1/1072—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks with cylinder blocks and actuating cams rotating together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/047—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being pin-and-slot mechanisms

Definitions

  • the invention relates to a volumetric pump, preferably without pulsation, consisting of two rotary pistons for the precise and variable dispensing of liquid, medicine, food, detergent, cosmetic product, chemical compound or any other type of fluid, gel or gas.
  • the guiding of the pistons is by bearings fixed to the ends of the pistons sliding along a cam placed on the inner wall of the stator and a second cam connected to the stator next to the rotor.
  • the return motion of the pistons is achieved by moving the bearings along the two cams.
  • the guiding of the pistons is by bearings fixed to the ends of the pistons sliding along the stator having an oblong shape. Pistons move radially as the rotor rotates. The return movement of the pistons can only be achieved by the coupling of two pairs of parallel pistons fixed to the rotor, each pair of which is offset by 180 ° with respect to the other and eccentric with respect to the axis of the piston. rotor rotation, so that the compression movement of the gases in a pair of pistons is ensured during the explosion of the gases in the other pair.
  • the return movement of the pistons is achieved by the eccentricity of the axis of rotation of the rotor relative to the axis of the stator.
  • the second problem is that the principle of spring valves used by these systems for the dispenser is unsuitable for the production of pumping systems of injected plastic parts which is normally made using elastomeric gaskets.
  • the third problem is that these systems have a discontinuous alternating operating cycle which does not allow to obtain a pulsating flow rate in the case of their use as a pumping system.
  • a fourth problem encountered is that these systems are not feasible plastic injected parts for the production of inexpensive consumable fluid module pumps that can be discarded after use.
  • the present invention relates to a high performance pump composed of a reduced number of parts with a very low production cost for pumping and dosing liquids, viscous products or variable flow gases without pulsation.
  • This invention solves the problems discussed above and allows for simplified development for the very large scale production of pumps with an element in contact with the interchangeable pumped fluid, preferably inexpensive disposable plastics.
  • the pump comprises two pistons, parallel in opposition, placed in two cylindrical cavities of a rotor rotating in a cylindrical stator, with at least one input port and at least one output port, having on its inner face a guide cam pistons and a housing preferably for a sealing element positioned between the rotor and the stator.
  • the principle of pumping consists of rotating the rotor placed inside the stator so as to axially move the pistons in the rotor via the cam located on the inner wall of the stator.
  • the cam is dimensioned according to six segments, a short nominal fill segment, two short discharge segments with a flow rate lower than the nominal flow rate of the pump, a long discharge segment at the nominal flow rate of the pump and two valve switching segments between the inlet and outlet ports on each pumping chamber.
  • the other chamber switches from the output port to the input port, then fills up completely and switches from the input port to the output port, then the two chambers preferably preferably expel simultaneously to the output port at a reduced flow rate, the sum of which equals the nominal flow rate of the pump so that the output flow rate is preferably stable, continuous, uninterrupted and without pulsation.
  • the switching system of the inlet and outlet ports to the pumping chambers is synchronously adapted to the movement of the pistons without additional element in order to achieve a high performance seal with a minimum of components.
  • the drive of the pump consists mainly of a support, a drive head and an actuator, preferably in the form of a motor.
  • the pump is particularly well suited for low-cost production as it consists only of easily injectable plastic parts that can be assembled automatically.
  • the pump (1) consists of a stator (2) and a rotor (3) placed inside the stator (2).
  • the pump (1) is coupled to a motor (30) preferably via a drive head (31) and a holding bracket (34) for receiving the stator (2) of the pump (1).
  • Pins (32, 32 ') placed on the drive head (31) housed in the hollow base (33) of the rotor (3) rotate the rotor (3) of the pump (1) when the it is coupled to the motor assembly (35).
  • the stator (2) consists of a cam (10) placed on its inner face (2 '), a housing (11) receiving a sealing element (4), an inlet port ( 14) and an output port (16).
  • the rotor (3) consists of two cavities (18, 18 '), preferably cylindrical, parallel, opposite and eccentric to the axis of rotation of the rotor (2), having notches (8, 8') respectively at the upper ends of the cavities (18, 18 ') and through holes (9, 9') connecting each lower end of the cavities (18, 18 ') with the inner face (3') of the rotor (3).
  • Two pistons, preferably identical, (5,5 ') each consist of two circular seals (7,7'), a front channel (19) placed on the front face of the piston (5) in connection with a lateral channel (20) located between the two circular seals (7,7 ') and a guide element (6) placed at the lower end perpendicularly to the axis of the piston (5).
  • the pistons (5,5 ') placed in the cavities (18,18') of the stator (3) respectively form two pumping chambers (21,21 ') parallel, eccentric, opposite of 180 °.
  • the input cavity (13) in connection with the input port (14), the output cavity (15) in connection with the output port (16) and the two switching transition zones of port (17,17 ') located between each side of the cavities (13,15) are positioned on the stator (3) so as to correspond to the filling and emptying phases of the chambers (21,21') according to the cam (10) .
  • the guide elements (6,6 ') of the pistons (5,5') are placed perpendicularly in the cam (10) of the stator (2).
  • the guide elements (6, 6 ') are driven and held by the notches (8, 8') of the rotor (3).
  • the sealing element (4) is placed between the stator (2) and the rotor (3).
  • the profile of the cam (10) of the stator (2) consists of six segments delimited by the points (50, 51, 52, 53, 54, 55).
  • Each segment of the cam (10) preferably corresponds to one phase of the pumping sequence in the following manner; the low-flow discharge start phase is on the segment between the points (53,52), the nominal flow discharge phase is on the segment between the points (52,51), the end-of-drain phase at reduced flow is on the segment between the points (51,50), the switching phase of the output port (16) to the input port (14) is on the segment between the points (50,55) , the filling phase is on the segment between the points (55, 54) and the switching phase of the input port (14) to the output port (16) is on the segment between the points (54, 54), 53).
  • Each segment of the cam is dimensioned so as to preferably obtain a linear displacement of the pistons (5,5 ') so that the nominal flow rate (60) at the pump outlet (1) is constant without pulsation.
  • the linear displacements of the pistons (5,5 ') correspond to constant flow rates (61,61', 62, 62 '63, 63').
  • the nominal flow rate (60) of the pump (1) as a function of the rotation angle of the rotor (3) corresponds to the sum of the reduced flow rates (61, 61 ') of the pumping chambers (21,21 ') for an angle of rotation preferably between 0 and 45 °, at the nominal flow rate (62) of the chamber (21) for an angle preferably comprised between 45 ° and 180 °, to the sum of reduced flow rates (63, 63 ') of the pumping chambers (21, 21') for a rotation angle preferably comprised between 180 ° and 225 ° and at the nominal flow rate (62 ') of the chamber (21') for an angle comprised between 225 ° and 360 °.
  • the piston (5) When the rotor (3) preferably rotates from 150 ° to 180 °, the piston (5) continues to expel the liquid from the chamber (21) at a nominal flow rate (62).
  • the piston (5 ') stops moving linearly and the lateral channel (20') via the through hole (9 ') is connected to the port switching transition zone (17) which closes the chamber (21 ').
  • the pistons (5, 5 ') move along the reduced flow cam (63,63'), which has the effect of simultaneously expelling the chamber liquid (21,21 ') to the outlet port (16) via the front channels (19, 19'), the side channels (20,20 ') of the pistons (5,5') and the passage (9,9 ') in connection with the outlet cavity (15).
  • the piston (5 ') When the rotor (3) rotates from 255 ° to 330 °, the piston (5 ') continues to expel the liquid from the chamber (21') at a nominal flow rate (62 ').
  • the piston (5) moves linearly in opposite directions which has the effect of sucking the liquid in the chamber (21) from the inlet port (14) via the front channel (19), the side channel (20) and the through hole (9) in connection with the inlet cavity (13).
  • the piston (5 ') continues to expel the liquid from the chamber (21') at a nominal flow rate (62 ').
  • the piston (5) stops moving linearly and the lateral channel (20), via the through hole (9), is connected to the port switching transition zone (17) which closes the chamber (21) .
  • a cover (70) is placed opposite the stator (2) so as to maintain the rotor (3) between the cover (70) and the stator (2).
  • the cover (70) is held on the stator (2) preferably using at least one clip (71) and a clip (72).
  • the tightening of the rotor (3) in the stator (2) can thus be ensured by the cover.
  • the cover (70) provides pre-tightening and clamping in operation is performed by an external locking member bearing on the cover (70) and the stator (2).
  • Guiding elements (76,76 '), preferably in the form of pins, are placed inside the holes (75,75') of the pistons (5,5 ') so as to guide the pistons (5,5'). ) along the cam (10) of the stator (2) and the cam (10 '), symmetrical to the cam (10), placed on the inside of the cover (70).
  • the guiding elements (76,76 ') are thus perfectly guided symmetrically at their ends making the displacements of the pistons (5,5') more efficient and ensuring a better resistance to the forces when the pump rotates at high speed or delivers at high speed. High pressure.
  • the guide members (76,76 ') freely rotate within the holes (75,75') of the pistons (5,5 ') so as to reduce friction with the cam (10) and the cam (10').
  • the input and output ports (14, 16) are optionally placed perpendicular to the axis of rotation of the rotor (3).
  • the assembly (80) is composed of a motor (30) fixed to a support (81) receiving the pump (1) held on the support (81) by fastening elements (82, 82 ') preferably in the form of clips.
  • the carrier (81) is adapted to receive at least one air or pressure sensor (83) preferably attached near the inlet (14) or outlet (16) port.
  • the sensor (83) can receive a tube (85) in the housing (84) to detect air bubbles or to measure the pressure at the inlet (14) or the outlet (16) of the pump (1).
  • the fasteners (82, 82 ') may be integral with the pump (1), the carrier (81), or a combination of both.
  • the rotor (3) is driven by the motor shaft (89).
  • the rotor (3) is held in abutment against the sealing element (4) by means of at least one return element (90) such as a spring or any other means when the pump (1) is not connected to the support (81) and can be moved axially towards the return member (90) by pressing on the lower end (86) of the rotor (3).
  • the rotor (3) is no longer in contact with the sealing element (4), which creates a controlled channel or leak (not shown) between the cavities (13, 15) for connecting the input and output ports (14,16) directly. Sealing towards the outside is ensured by the sealing elements 98 and 99.
  • This function is particularly adapted in the procedures requiring to circulate the fluid through the pump (1) and the inlet and outlet tubes (not shown) connected to the input and output ports (14,16) without the aid of an external drive.
  • This type of procedure is commonly used in a hospital setting when a pump is turned on to purge the air by gravity contained in the tubes or pipes connected to the pump (1) before connecting it to the head of the pump. drive (31) or support (81). Similarly, it may be necessary to purge the fluid contained in the tubes or pipes after use of the pump or when the drive is inoperative.
  • the seal (97) optional, improves the guidance of the rotor.
  • the return element (90) can be adapted so that the function is reversed and the rotor (3) must be pulled in the direction opposite to the return element (90) to bear on the element sealing (4).
  • the cam (10) is adapted to be able to position a guide member (6 or 6 ') in a groove (101) preferably located within the cam (10).
  • a guide element (6 or 6 ') is placed at the bottom of the groove (101)
  • the associated piston (5 or 5') is held in the up position in the pumping chamber (21 or 21 ') in order to have the minimum volume.
  • the other guide member (6 'or 6) also in the up position on the cam (10), the second pumping chamber (21' or 21) is maintained with the minimum volume.
  • the stator (2) is adapted to receive two flexible elements (87,87 '), preferably in the form of silicone or elastomer membranes, in connection with the input and output ports (14,16) and the pumping chambers (21,21 ') via the channels (93 and 93').
  • Each channel (93,93 ') is connected at its other end respectively to the cavities (94,94') located between the stator (2) and the flexible elements (87,87 ').
  • each flexible element (87,87 ') forms with the support (81) two cavities (95,95') each having respectively a connecting channel (102, 102 ') placed in the support (81).
  • the pressure variations in the pumping chambers (21,21 ') respectively deform the flexible elements (87,87') which transmit the pressure of each cavity (94,94 '). ) respectively to the cavities (95,95 '). It is then possible to measure the pressure at the inlet and the outlet of the pump by placing two pressure sensors (not shown) at the outer ends of the channels (102, 102 ').
  • the flexible elements (87,87 ') provide insulation and sealing between the internal fluid circuit of the pump and the outside, while allowing measurement of pressure variations at the inlet and the outlet pump. This system is particularly well suited for measuring occlusions or leaks at the inlet or outlet of the pump without having to connect pressure sensors to the external tubings of the pump.
  • the integration of flexible elements (87,87 ') in the pump (1) reduces the overall size of the system, which is extremely important for example for portable pumps especially in the medical field.
  • the assembly (120) is composed of a motor (30) fixed on a support (81) receiving the stator (2).
  • the rotor (3) is positioned inside the stator (2) so that the sealing element (4) is held between the rotor (3) and the stator (2).
  • the cam (10) located inside the support (81) is adapted to receive at least one pair of bearings (123, 123 ') respectively fixed to the guide elements (6, 6') in order to reduce friction and wear of the cam (10) and the guide elements (6,6 ').
  • a second pair of bearings (124, 124 ') respectively fixed to the guide elements (6, 6') makes it possible to reinforce the alignment of the guide elements (6, 6 ') when it is necessary to deliver very precise doses. of fluids and the most perfect linear flow possible.
  • the rotor (3) can be optionally guided in the stator (2) and the support (81) by bearings or bearings. The previously described pump principle is reversible by rotating the rotor in the other direction.
  • angular values defined above are given by way of example and may be different depending on the dimensioning of the cam or the desired flow curve.
  • the reduced flow rates (61, 61 ', 63, 63') are preferably equivalent to half the nominal flow rate of the pump.
  • the cam can be adapted to obtain a pulsed or semi-pulsed flow.
  • the housing (11) and the sealing element (4) can be placed on the inner face of the rotor (3).
  • the cavities (13, 15) and switching transition zones (17, 17 ') may be perpendicular to the axis of rotation of the pump.
  • the sealing element is preferably placed at the periphery of the rotor of the pump.
  • the rotor may be adapted to review a magnetic element so as to be rotated by means of a magnet or other external electromagnetic element.
  • the pump can thus be coupled to a drive without contact.
  • This variant is particularly suitable in the case where the pump is implanted under the skin or in the body and must be operated from the outside.
  • the cover can be adapted to receive the pump input and output ports.
  • the sealing between the moving parts is preferably achieved by an elastomer, an overmolded seal or any other sealing element.
  • an elastomer elastomer
  • an overmolded seal elastomer
  • any other sealing element elastomer
  • the elements constituting the pump are preferably plastic and disposable.
  • the pump can be sterilized for dispensing food or medicine for example. The choice of materials, however, is not limited to plastics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP13726269.7A 2012-05-23 2013-05-02 Pompe rotative volumétrique sans pulsation Active EP2852760B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IBPCT/IB2012/001003 2012-05-23
IBPCT/IB2012/002451 2012-11-23
PCT/IB2013/000819 WO2013175277A1 (fr) 2012-05-23 2013-05-02 Pompe rotative volumetrique sans pulsation

Publications (2)

Publication Number Publication Date
EP2852760A1 EP2852760A1 (fr) 2015-04-01
EP2852760B1 true EP2852760B1 (fr) 2016-06-29

Family

ID=48539304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13726269.7A Active EP2852760B1 (fr) 2012-05-23 2013-05-02 Pompe rotative volumétrique sans pulsation

Country Status (10)

Country Link
US (1) US9970436B2 (zh)
EP (1) EP2852760B1 (zh)
JP (1) JP2015517627A (zh)
KR (1) KR20150018826A (zh)
CN (1) CN104641109B (zh)
AU (1) AU2013264969A1 (zh)
BR (1) BR112014028942A2 (zh)
CA (1) CA2874380A1 (zh)
IN (1) IN2014DN10632A (zh)
WO (1) WO2013175277A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015132645A1 (fr) * 2014-03-02 2015-09-11 Swissinnov Product Sarl Pompe volumetrique avec mecanisme de purge
NL2016728B1 (en) * 2016-05-03 2017-11-10 Actuant Corp Pump unit with integrated piston pump and electric motor.
US11174852B2 (en) 2018-07-20 2021-11-16 Becton, Dickinson And Company Reciprocating pump
WO2020078825A1 (fr) * 2018-10-14 2020-04-23 Swissinnov Product Sarl Pompe de precision alternative a debit continu
EP4188477A1 (en) 2020-08-03 2023-06-07 Baxter International Inc. Peritoneal dialysis cycler using micropump

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Publication number Priority date Publication date Assignee Title
US1776843A (en) 1926-02-18 1930-09-30 Emil Flechtheim Internal-combustion engine
US1936614A (en) 1929-12-06 1933-11-28 Edwin C Ballman Pressure pump
US4177771A (en) 1976-08-12 1979-12-11 Ata Nutku Rotary engines with free reciprocating-rotating pistons and jet thrust drive
GB2014648A (en) 1978-02-17 1979-08-30 Lucas Industries Ltd A Pump for Liquids
US5145339A (en) * 1989-08-08 1992-09-08 Graco Inc. Pulseless piston pump
JPH0741903Y2 (ja) * 1991-05-16 1995-09-27 日信工業株式会社 ラジアルプランジャポンプ装置
US5993174A (en) * 1994-08-23 1999-11-30 Nikkiso Co., Ltd. Pulsation free pump
JPH08177511A (ja) 1994-12-20 1996-07-09 Sankyo Seisakusho:Kk カム式エンジン
JP2005139967A (ja) * 2003-11-05 2005-06-02 Aisan Ind Co Ltd ラジアルピストンポンプ
WO2006050233A1 (en) 2004-10-28 2006-05-11 Nordson Corporation Rotary pump
DE102004062445A1 (de) * 2004-12-17 2006-06-22 Kaco Gmbh + Co. Kg Gleitringdichtung, insbesondere für Kraftfahrzeug-Kühlmittelpumpen
US7421986B2 (en) 2005-09-16 2008-09-09 Leonid Yakhnis Rotary radial internal combustion piston engine
CN101131152A (zh) * 2007-10-16 2008-02-27 天津市泽华源泵业科技发展有限公司 恒压变量径向柱塞泵
US20100101534A1 (en) * 2008-10-27 2010-04-29 Tzu-Wei Yu Multiple-fuel rotary engine
CN101852089B (zh) 2009-09-28 2013-12-11 谢坤 缸塞共转式发动机
DE102009057792B4 (de) * 2009-12-11 2016-08-18 Harm Kölln Kontinuierlich fördernde Infusionspumpe

Also Published As

Publication number Publication date
CN104641109B (zh) 2017-03-08
IN2014DN10632A (zh) 2015-09-11
US9970436B2 (en) 2018-05-15
US20150147210A1 (en) 2015-05-28
KR20150018826A (ko) 2015-02-24
WO2013175277A1 (fr) 2013-11-28
BR112014028942A2 (pt) 2017-06-27
CA2874380A1 (en) 2013-11-28
EP2852760A1 (fr) 2015-04-01
CN104641109A (zh) 2015-05-20
AU2013264969A1 (en) 2014-12-11
JP2015517627A (ja) 2015-06-22

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