CA2213194A1 - Multiple piston pump - Google Patents

Multiple piston pump

Info

Publication number
CA2213194A1
CA2213194A1 CA002213194A CA2213194A CA2213194A1 CA 2213194 A1 CA2213194 A1 CA 2213194A1 CA 002213194 A CA002213194 A CA 002213194A CA 2213194 A CA2213194 A CA 2213194A CA 2213194 A1 CA2213194 A1 CA 2213194A1
Authority
CA
Canada
Prior art keywords
piston chamber
inflow
directed
control valve
outflow
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
Application number
CA002213194A
Other languages
French (fr)
Other versions
CA2213194C (en
Inventor
Carl D. Beckett
Kevin D. O'hara
Daniel B. Olsen
Steven E. Soar
Glenn E. Siemer
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.)
Micropump Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA002418623A priority Critical patent/CA2418623C/en
Publication of CA2213194A1 publication Critical patent/CA2213194A1/en
Application granted granted Critical
Publication of CA2213194C publication Critical patent/CA2213194C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
    • F04B11/0066—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control with special shape of the actuating element
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • 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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/18—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having self-acting distribution members, i.e. actuated by working fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

A reciprocating piston pump (10) provides pulseless delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid. The pump includes two pistons (18, 48) with pumping chambers that are alternately connected to inflow and outflow lines through a control valve (100). The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. A rotating cam (80) moves the pistons of the pump and the control valve between their operating positions described above. The cam rotates around an axis that is parallel to the axis of movement of the piston pumps. A control surface is carried by and rotated by the cam in one embodiment.
CA002213194A 1995-03-20 1996-03-20 Multiple piston pump Expired - Fee Related CA2213194C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002418623A CA2418623C (en) 1995-03-20 1996-03-20 Rotary control valve

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US40639995A 1995-03-20 1995-03-20
US406,399 1995-03-20
PCT/US1996/003777 WO1996029515A1 (en) 1995-03-20 1996-03-20 Multiple piston pump

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002418623A Division CA2418623C (en) 1995-03-20 1996-03-20 Rotary control valve

Publications (2)

Publication Number Publication Date
CA2213194A1 true CA2213194A1 (en) 1996-09-26
CA2213194C CA2213194C (en) 2004-07-13

Family

ID=23607820

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002213194A Expired - Fee Related CA2213194C (en) 1995-03-20 1996-03-20 Multiple piston pump

Country Status (4)

Country Link
EP (1) EP0817916A4 (en)
JP (1) JPH11502581A (en)
CA (1) CA2213194C (en)
WO (1) WO1996029515A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976927A3 (en) * 1998-07-27 2000-10-04 Walu Labortechnik GmbH Metering or titrating device, especially burette
US6514569B1 (en) 2000-01-14 2003-02-04 Kenneth Crouch Variable volume positive displacement dispensing system and method
JP2001263580A (en) * 2000-03-21 2001-09-26 Lube Corp Micro discharge pump device
DE60018183D1 (en) * 2000-09-26 2005-03-24 Nu Image Packaging Clwyd Ltd A Device for dispensing liquids
KR100920359B1 (en) * 2008-04-03 2009-10-20 다이킨 고교 가부시키가이샤 Piston pump
JP4268658B1 (en) * 2008-04-03 2009-05-27 ダイキン工業株式会社 Piston pump
EP2189658B1 (en) * 2008-11-24 2017-11-22 Delphi International Operations Luxembourg S.à r.l. Fluid Pump Assembly
WO2012022924A1 (en) 2010-08-17 2012-02-23 Artemis Intelligent Power Limited Fluid-working machine with multi-lobe ring cam
GB2484890A (en) 2010-08-17 2012-05-02 Artemis Intelligent Power Ltd Ring cam ensuring smooth follower handover between segments
CN103104432A (en) * 2013-02-28 2013-05-15 上海舜宇恒平科学仪器有限公司 Liquid chromatograph constant flow pump
KR101408943B1 (en) * 2013-03-04 2014-06-17 안동대학교 산학협력단 Plunger pump
KR101408963B1 (en) * 2013-03-07 2014-06-17 안동대학교 산학협력단 Plunger pump

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161403A (en) * 1920-02-25 1921-04-14 John Fanning Improvements in pumping machinery
DE515359C (en) * 1929-07-05 1931-01-02 Feinmaschb G M B H Pump, especially spinning pump, for viscous liquids with parallel pistons arranged in a circle
US2010377A (en) 1930-12-26 1935-08-06 Cincinnati Milling Machine Co Hydraulic power unit
US2600099A (en) * 1944-08-05 1952-06-10 Detrez Rene Valve device
US2458294A (en) * 1945-01-17 1949-01-04 Lenious G Parker Oil distributing system
DE818607C (en) * 1949-09-04 1951-10-25 Karl Schrader Multi-cylinder piston pump
US2969810A (en) * 1955-12-27 1961-01-31 Edward C Dudley Wobble plate pump
FR1522530A (en) * 1967-03-17 1968-04-26 Hydrostatic Balancing Pump
US3702143A (en) * 1971-08-30 1972-11-07 Norman L Van Wagenen Kidney valve for fluid motor and other uses
US3816029A (en) 1972-10-03 1974-06-11 Duriron Co Pumping unit for constant pulseless flow
GB1481043A (en) 1974-06-10 1977-07-27 Paterson Candy Int Non-pulsing pumping apparatus
US4359312A (en) 1978-08-15 1982-11-16 Zumtobel Kg Reciprocating pump for the pulsation-free delivery of a liquid
US4705458A (en) 1982-07-30 1987-11-10 Bellofram Corporation Fluid operated pump
US4556371A (en) 1983-07-18 1985-12-03 Fmc Corporation Constant flow positive displacement pump
US4687426A (en) 1984-07-31 1987-08-18 Fuji Techno Kogyo Kabushiki Kaisha Constant volume pulsation-free reciprocating pump
DD258446A1 (en) * 1987-03-16 1988-07-20 Orsta Hydraulik Veb K axial piston

Also Published As

Publication number Publication date
EP0817916A4 (en) 2000-05-24
EP0817916A1 (en) 1998-01-14
CA2213194C (en) 2004-07-13
JPH11502581A (en) 1999-03-02
WO1996029515A1 (en) 1996-09-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130320