EP0648541A3 - Laboratory centrifuge with imbalance stop. - Google Patents

Laboratory centrifuge with imbalance stop. Download PDF

Info

Publication number
EP0648541A3
EP0648541A3 EP94115988A EP94115988A EP0648541A3 EP 0648541 A3 EP0648541 A3 EP 0648541A3 EP 94115988 A EP94115988 A EP 94115988A EP 94115988 A EP94115988 A EP 94115988A EP 0648541 A3 EP0648541 A3 EP 0648541A3
Authority
EP
European Patent Office
Prior art keywords
motor
stator
field strength
imbalance
laboratory centrifuge
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
EP94115988A
Other languages
German (de)
French (fr)
Other versions
EP0648541B1 (en
EP0648541A2 (en
Inventor
Bernd Keller
Matthias Meyer
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.)
Geratebau Eppendorf GmbH
Original Assignee
Geratebau Eppendorf GmbH
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 Geratebau Eppendorf GmbH filed Critical Geratebau Eppendorf GmbH
Publication of EP0648541A2 publication Critical patent/EP0648541A2/en
Publication of EP0648541A3 publication Critical patent/EP0648541A3/en
Application granted granted Critical
Publication of EP0648541B1 publication Critical patent/EP0648541B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/14—Balancing rotary bowls ; Schrappers
    • B04B9/146—Unbalance detection devices

Landscapes

  • Centrifugal Separators (AREA)
  • Testing Of Balance (AREA)

Abstract

A laboratory centrifuge with a rotor which has vessel holders and a motor which drives the said rotor in rotation and has an upright shaft, the stator of which motor is mounted on the housing of the centrifuge by means of sprung suspensions, and with a deactivation device which controls the motor and which uses an element attached to the stator and an element attached to the housing to determine the deflection of the stator occurring at the maximum acceptable limit imbalance and switches off the motor, is characterised in that one of the two elements is constructed as a field generator which produces a constant field and the other element is constructed as a field strength detector, the field strength detector being connected to an evaluation device which brings about deactivation when specific changes in the field strength which are produced by the deflection occur. <IMAGE>
EP94115988A 1993-10-15 1994-10-11 Laboratory centrifuge with imbalance stop Expired - Lifetime EP0648541B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4335119 1993-10-15
DE4335119A DE4335119C2 (en) 1993-10-15 1993-10-15 Laboratory centrifuge with unbalance shutdown

Publications (3)

Publication Number Publication Date
EP0648541A2 EP0648541A2 (en) 1995-04-19
EP0648541A3 true EP0648541A3 (en) 1995-09-20
EP0648541B1 EP0648541B1 (en) 2000-02-23

Family

ID=6500178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94115988A Expired - Lifetime EP0648541B1 (en) 1993-10-15 1994-10-11 Laboratory centrifuge with imbalance stop

Country Status (5)

Country Link
US (1) US5496254A (en)
EP (1) EP0648541B1 (en)
JP (1) JP3448113B2 (en)
AT (1) ATE189863T1 (en)
DE (2) DE4335119C2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3710001B2 (en) * 1995-06-16 2005-10-26 日立工機株式会社 centrifuge
US5955855A (en) * 1997-04-09 1999-09-21 Medar, Inc. Method and system for tuning a drive to its coupled motor to minimize motor resonance and sensing device for use therein
DE29712121U1 (en) * 1997-07-10 1997-09-11 Sigma Laborzentrifugen Gmbh, 37520 Osterode Control device for a laboratory centrifuge
US5800331A (en) * 1997-10-01 1998-09-01 Song; Jin Y. Imbalance detection and rotor identification system
JP3968960B2 (en) * 1999-07-15 2007-08-29 日立工機株式会社 Centrifuge
US6379109B1 (en) 2000-05-12 2002-04-30 Roy F. Senior, Jr. Method and apparatus for detecting and removing obstructions in mechanical aerators
US6635007B2 (en) * 2000-07-17 2003-10-21 Thermo Iec, Inc. Method and apparatus for detecting and controlling imbalance conditions in a centrifuge system
US6350224B1 (en) 2000-07-17 2002-02-26 Westinghouse Savannah River Company, Llc Centrifugal unbalance detection system
US7055368B2 (en) * 2002-05-21 2006-06-06 Kendro Laboratory Products, Inc. Automatic calibration of an imbalance detector
JP4352844B2 (en) * 2003-10-09 2009-10-28 日立工機株式会社 Centrifuge
US7635328B2 (en) * 2005-12-09 2009-12-22 Pacific Centrifuge, Llc Biofuel centrifuge
US7555933B2 (en) * 2006-08-01 2009-07-07 Thermo Fisher Scientific Inc. Method and software for detecting vacuum concentrator ends-of-runs
DE102011078475B4 (en) * 2011-06-30 2013-05-23 Hanning Elektro-Werke Gmbh & Co. Kg Dynamic compensating device of a rotating body
DE102014102472B4 (en) * 2014-02-25 2021-04-22 Andreas Hettich Gmbh & Co. Kg centrifuge
DE102014116527B4 (en) * 2014-11-12 2020-01-23 Andreas Hettich Gmbh & Co. Kg Centrifuge and method for detecting unbalance in the centrifuge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144195B (en) * 1960-03-17 1963-02-21 Reactor Centrum Nederland Device for displaying, registering and influencing movements of the axis of rotation and the speed of the rotor of a centrifuge
EP0082956A1 (en) * 1981-12-24 1983-07-06 Kontron-Holding Ag Device for a contactless out-of-balance measurement
US4700117A (en) * 1985-05-31 1987-10-13 Beckman Instruments, Inc. Centrifuge overspeed protection and imbalance detection system
DE3935616A1 (en) * 1989-10-26 1991-05-02 Sigma Laborzentrifugen Gmbh Laboratory centrifuge safety monitor - has deflection measurer for oscillatory part controlling drive motor according to measurement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216868C (en) *
DE1780185U (en) * 1958-04-14 1958-12-24 Heinz Janetzki CENTRIFUGE WITH VERTICAL ROTOR.
US2895023A (en) * 1958-06-20 1959-07-14 Sorvall Inc Ivan Centrifuge deviation sensing switching mechanism
US3676723A (en) * 1970-03-02 1972-07-11 Bio Consultants Inc High speed centrifuge drive assembly
JPS539570U (en) * 1976-07-09 1978-01-26
US4214179A (en) * 1979-03-15 1980-07-22 Beckman Instruments, Inc. Rotor imbalance detector for a centrifuge
SU1156740A1 (en) * 1982-10-19 1985-05-23 Специальное Конструкторское Бюро Биофизической Аппаратуры Apparatus for monitoring operation of ultracentrifuge
GB8324913D0 (en) * 1983-09-17 1983-10-19 Fisons Plc Electrical detection device
FR2622290B1 (en) * 1987-10-22 1990-03-30 Jouan DEVICE FOR DETECTING THE BALANCE OF A ROTATING MACHINE FROM A PREDETERMINED THRESHOLD
SU1704840A1 (en) * 1988-07-18 1992-01-15 Московское научно-производственное объединение "Биофизприбор" Centrifuge checking device
JPH0726669B2 (en) * 1988-09-09 1995-03-29 日立工機株式会社 Rotating body unbalance detection method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144195B (en) * 1960-03-17 1963-02-21 Reactor Centrum Nederland Device for displaying, registering and influencing movements of the axis of rotation and the speed of the rotor of a centrifuge
EP0082956A1 (en) * 1981-12-24 1983-07-06 Kontron-Holding Ag Device for a contactless out-of-balance measurement
US4700117A (en) * 1985-05-31 1987-10-13 Beckman Instruments, Inc. Centrifuge overspeed protection and imbalance detection system
DE3935616A1 (en) * 1989-10-26 1991-05-02 Sigma Laborzentrifugen Gmbh Laboratory centrifuge safety monitor - has deflection measurer for oscillatory part controlling drive motor according to measurement

Also Published As

Publication number Publication date
US5496254A (en) 1996-03-05
DE4335119C2 (en) 1997-11-20
JPH07275739A (en) 1995-10-24
EP0648541B1 (en) 2000-02-23
JP3448113B2 (en) 2003-09-16
EP0648541A2 (en) 1995-04-19
DE4335119A1 (en) 1995-04-20
ATE189863T1 (en) 2000-03-15
DE59409153D1 (en) 2000-03-30

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