US3603706A - Electromagnetic micropump for processing aggressive liquid substances - Google Patents

Electromagnetic micropump for processing aggressive liquid substances Download PDF

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Publication number
US3603706A
US3603706A US810089A US3603706DA US3603706A US 3603706 A US3603706 A US 3603706A US 810089 A US810089 A US 810089A US 3603706D A US3603706D A US 3603706DA US 3603706 A US3603706 A US 3603706A
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United States
Prior art keywords
core
cylinder
bore
pump
inlet
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Expired - Lifetime
Application number
US810089A
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English (en)
Inventor
Antonin Cermak
Slavomir Michalek
Zdenek Strait
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Individual
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Individual
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Publication date
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Publication of US3603706A publication Critical patent/US3603706A/en
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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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids

Definitions

  • the present invention relates to an electromagnetic micropump, and more particularly to a perfectly sealed or compact micropump for safely pumping strongly aggressive liquid substances detrimental for human health, which sub stances are currently processed in laboratories and chemical plants.
  • the purpose of the present invention and the basic object of the same is to overcome the aforementioned disadvantages and to significantly improve the electromagnetic micropumps for processing aggressive liquid substances.
  • an electromagnetic micropump for processing aggressive liquid substances which comprises confining means for confining two opposite spaced electromagnetic elements connected to each other by tubular means and communicating via an axial bore terminated at either side of the micropump in nonreturn valves adapted to allow an unidirectional ow of the liquid to be pumped.
  • the opposite ends of said axial bore constitute inlet and outlet openings for supplying and delivering the processed liquid into and from the micropump, respectively.
  • a hollow movable electromagnet core adapted to reciprocate along a stationary piston arranged in the space between inner mouths of said inlet and outlet openings.
  • the hollow movable electromagnet core is sealed at its upper end portion while its lower end portion is provided with an axial bore for said stationary piston to pass.
  • the electromagnetic micropump according to the invention is compact, simple, small and packingless. Its dimensions are considerably smaller than that of well-known dosing pumps having the same output. It is safe in operation, can easily be attended, and even remote-controlled. Because of being fully compact, it prevents the ambient atmosphere from being contaminated with harmful substances so that it can preferably be employed in plants where explosion proof models of apparatuses are required.
  • the electromagnetic pump according to the present invention is designed to be utilized particularly for pumping and transporting radioactive solutions, for which purposes it is particularly suitable due to its tightness, reliability and possibility of being remote-controlled.
  • the electromagnetic micropump for processing aggressive liquid substances consists of a thin-walled cylinder body l made of nonmagnetic material, of an uppermost jacket 2 and a lowermost jacket 3 of ferromagnetic material, adapted to receive electromagnetic coils or solenoids 4 and 5, respectively, provided with plates or armatures 6 and 7, respectively, made of ferromagnetic material, of an upper and a lower nonreturn valve 8 and 9, respectively, and finally of an inlet opening l0 and an outlet opening l1.
  • a movable cylindrical core 13 having a cavity 14 therein and adapted to reciprocate along a coaxially arranged stationary piston 16 designed to pass through a cylin drical bore 15 provided inthe core 13.
  • micropump operates as follows:
  • the movable cylindrical core 13 is given an oscillating movement therebetween.
  • the liquid is forced out of the room 12 via nonreturn valve 8 through the outlet opening 11.
  • the volume of the forced liquid equals to the solid volume of that part of the stationary piston 16 which has been exposed due this upward stroke of the movable cylindrical core 13.
  • the opposite or downward movement of the core 13, i.e. toward the jacket 3 there will be drawn in through the inlet opening 10 via the nonretum valve 9 into the inner room l2 such a volume of the liquid corresponding to the solid volume of that part of the stationary piston 16 which is covered during this downward core stroke.
  • the pumped liquid volume is proportional to the diameter of the piston 16, to the stroke lift of the core 13, and to the frequence of oscillations.
  • the suction lift depends upon the tightness of the micropump and on the solenoid capacity.
  • An electromagnetic pump comprising a cylinder having opposite closed ends; fluid inlet and outlet passage means respectively communicating with said opposite ends of said cylinder; a hollow electromagnetic core arranged with clearance in said cylinder for reciprocating movement in axial direction, said core having a closed end and being formed with a bore extending in axial direction from the other end into said core; a pair of one way valves located outside of said core respectively in said inlet and outlet passage means; a stationary piston slidably received in said bore; and electromagnet means cooperating with said core for reciprocating the same in said cylinder so that during reciprocation of said core fluid will flow exclusively through the clearance between said cylinder and said core from said inlet to said outlet passage means, said pump performing its pumping stroke during movement of said core in a direction in which a portion of said stationary piston moves out of said bore and its suction stroke during movement of said core in the opposite direction in which said portion of said stationary piston moves again into said bore.
  • a pump as defined in claim l wherein said bore in said core, said stationary piston, said inlet and said outlet passage means are aligned along a common axis coinciding with the axis of said cylinder.
  • a pump as defined in claim 2, wherein said bore in said hollow core is constituted by the inner surface of a tube integral at one end with said other end of said core, said tube communicating at the other end thereof with the interior of said hollow core.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
US810089A 1968-03-26 1969-03-25 Electromagnetic micropump for processing aggressive liquid substances Expired - Lifetime US3603706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS232068 1968-03-26

Publications (1)

Publication Number Publication Date
US3603706A true US3603706A (en) 1971-09-07

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ID=5359990

Family Applications (1)

Application Number Title Priority Date Filing Date
US810089A Expired - Lifetime US3603706A (en) 1968-03-26 1969-03-25 Electromagnetic micropump for processing aggressive liquid substances

Country Status (3)

Country Link
US (1) US3603706A (de)
DE (1) DE1915094A1 (de)
GB (1) GB1234686A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357656A1 (de) * 1973-11-19 1975-05-22 Eberspaecher J Dosierkolbenpumpe, insbesondere brennstoffkolbenpumpe fuer brennstoffeuerungen
US4102610A (en) * 1976-09-03 1978-07-25 John Taboada Constant volume seal-free reciprocating pump
US4597697A (en) * 1982-07-16 1986-07-01 Shaffer Frank E Adjustable metering oil pump
WO1989003498A1 (en) * 1987-10-08 1989-04-20 Helix Technology Corporation Linear drive motor with flexure bearing support
US20100150754A1 (en) * 2008-12-17 2010-06-17 Discovery Technology International, Lllp Piezoelectric pump
US20100156240A1 (en) * 2008-12-19 2010-06-24 Discovery Technology International, Lllp Piezoelectric motor
US20110050038A1 (en) * 2009-09-01 2011-03-03 Discovery Technology International, Lllp Piezoelectric rotary motor with high rotation speed and bi-directional operation
US20170268491A1 (en) * 2016-03-15 2017-09-21 Ode (Hk) Company Limited Fluid pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3233240A1 (de) * 1982-09-04 1984-03-08 Max Prof. Dr.-Ing. 8520 Erlangen Schaldach Kolbenpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925934A (en) * 1931-07-11 1933-09-05 Rimstad Ib Adam Electromagnetic air or liquid pump
GB411313A (en) * 1932-07-26 1934-06-07 British Thomson Houston Co Ltd Improvements in and relating to mechanism operated by solenoids for transmitting fluid pressure
US3459132A (en) * 1967-01-28 1969-08-05 Ernst Meyer Induction pump

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1925934A (en) * 1931-07-11 1933-09-05 Rimstad Ib Adam Electromagnetic air or liquid pump
GB411313A (en) * 1932-07-26 1934-06-07 British Thomson Houston Co Ltd Improvements in and relating to mechanism operated by solenoids for transmitting fluid pressure
US3459132A (en) * 1967-01-28 1969-08-05 Ernst Meyer Induction pump

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2357656A1 (de) * 1973-11-19 1975-05-22 Eberspaecher J Dosierkolbenpumpe, insbesondere brennstoffkolbenpumpe fuer brennstoffeuerungen
US4102610A (en) * 1976-09-03 1978-07-25 John Taboada Constant volume seal-free reciprocating pump
US4597697A (en) * 1982-07-16 1986-07-01 Shaffer Frank E Adjustable metering oil pump
WO1989003498A1 (en) * 1987-10-08 1989-04-20 Helix Technology Corporation Linear drive motor with flexure bearing support
US8183741B2 (en) 2008-12-17 2012-05-22 Discovery Technology International, Inc. Valves based on reversible piezoelectric rotary motor
US20100150754A1 (en) * 2008-12-17 2010-06-17 Discovery Technology International, Lllp Piezoelectric pump
US20100148102A1 (en) * 2008-12-17 2010-06-17 Discovery Technology International, Lllp Valves based on reversible piezoelectric rotary motor
US8183740B2 (en) 2008-12-17 2012-05-22 Discovery Technology International, Inc. Piezoelectric motor with high torque
US20100156240A1 (en) * 2008-12-19 2010-06-24 Discovery Technology International, Lllp Piezoelectric motor
US8183744B2 (en) 2008-12-19 2012-05-22 Discovery Technology International, Inc. Piezoelectric motor
US8183742B2 (en) 2009-09-01 2012-05-22 Discovery Technology International, Inc. Piezoelectric rotary motor with high rotation speed and bi-directional operation
US20110050038A1 (en) * 2009-09-01 2011-03-03 Discovery Technology International, Lllp Piezoelectric rotary motor with high rotation speed and bi-directional operation
US20170268491A1 (en) * 2016-03-15 2017-09-21 Ode (Hk) Company Limited Fluid pump
US10221841B2 (en) * 2016-03-15 2019-03-05 Ode (Hk) Company Limited Fluid pump

Also Published As

Publication number Publication date
GB1234686A (en) 1971-06-09
DE1915094A1 (de) 1969-10-02

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