US3724765A - Tablet disruptor device - Google Patents

Tablet disruptor device Download PDF

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Publication number
US3724765A
US3724765A US00177555A US3724765DA US3724765A US 3724765 A US3724765 A US 3724765A US 00177555 A US00177555 A US 00177555A US 3724765D A US3724765D A US 3724765DA US 3724765 A US3724765 A US 3724765A
Authority
US
United States
Prior art keywords
teeth
rotor
shaft
series
hollow member
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.)
Expired - Lifetime
Application number
US00177555A
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English (en)
Inventor
D Rohrbaugh
E Petersen
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.)
Beckman Coulter Inc
Original Assignee
Beckman Instruments Inc
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 Beckman Instruments Inc filed Critical Beckman Instruments Inc
Application granted granted Critical
Publication of US3724765A publication Critical patent/US3724765A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/0705—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/062—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives with rotor elements extending axially in close radial proximity of a concentrically arranged slotted or perforated ring

Definitions

  • the shaft carries at its lower end a rotor PP NOJ 177,555 provided with a plurality of teeth which are surrounded by the teeth on the hollow member.
  • Rotation 52 us. Cl ..24l/46.06 241/188 R 241/258 0f the draws the tablet and liquid upward into 259/96 the rotor and propels the mixture radially outward [51] Int Cl nozc 18/10 1302c 13/18 through the teeth in the hollow member whereby the [58] Fieid 46 06 i 17 46 08 tablet will be severed and broken into pieces by the 241/DIG 6 shearing action between the two sets of teeth.
  • an initial fimction which must be performed by such an analyzer is the severing and breaking up of the tablets into small pieces and the dissolvingof the active ingredients of the
  • a device similar to the beforementioned Willems Polytron in which some of the teeth on the outer shaft are longer than the other teeth thereon so as to provide enlarged entrance openings for solid particles to enter into the head of the device for disruption and mixing with the liquid.
  • an inverted cone-shaped element is provided on the bottom of the 0 rotor to establish a streamlined liquid flow pattern tablets in a suitable liquid.
  • This function must be per- I machines have been employed for dispersing and dissolving tablets in solvents for chemical analysis. However, such devices are relatively slow and inefficient in performing this function.
  • the commercial device includes a hollow outer shaft and a central shaft extending axially through the outer shaft.
  • the outer shaft is formed at its lower end with a plurality of circularly arranged, spaced'teeth.
  • the inner shaft carries at its lower end a rotor comprising a laterally extending arm having a pair of downwardly extending teeth at opposite ends thereof which are in close radial proximity to the teeth on the outer shaft.
  • FIG. 1 is a side elevational view of the prior art Willems Polytron with the head thereof shown positioned in a container of solution;
  • FIG. 2 is a partial longitudinal sectional view through the head of the device illustrated in FIG. 1;
  • FIG. 3 is a longitudinal partial sectional view through the head of a tablet disruptor device constructed in accordance with the present invention
  • FIG. 4 is a side elevational view of the lower end of the outer shaft illustrated in FIG. 3;
  • FIG. 5 is a horizontal sectional view taken along line 55 of FIG. 3.
  • FIGS. 1 and 2 illustrate the prior art Willems Polytron device
  • the device 8 includes an electric motor 12 which drives a central shaft 14 mounted within an outer hollow shaft 16.
  • the outer shaft 16 is suitably secured to the housing of the motor 12 to form a stator.
  • the lower end of the shaft 16 is formed with a series of circularly arranged spaced teeth 18 concentric with the longitudinal axis of the shaft 14.
  • a rotor 20 is fixedly mounted on the end of the shaft 14.
  • the rotor includes a laterally extending arm 22 symmetrically mounted with respect to the axis of rotation of shaft 14.
  • a pair of downwardly extending teeth 24 are formed at opposite ends of the arm providing therebetween a downwardly facing open suction space 25.
  • the outer surfaces of the teeth 24 lie in close radial proximity to the inner surfaces of the teeth 18 on the outer shaft 16.
  • the lower ends 26 of the teeth 24 on the rotor are recessed behind or above the lower ends 28 of the teeth 18 on the outer shaft 16.
  • FIGS. 3-5 illustrate the head of a tablet disruptor device constructed in ac cordance with the present invention.
  • the stator or outer shaft 16' of the device 8' of the present invention differs primarily from the stator 16 in the device 8 in that every second tooth 18a is shorter in the axial direction than the next adjacent tooth l8b so that the longer teeth 18 are positioned alternately with respect to the shorter teeth 18a about the stator 16.
  • the shorter teeth l8'a are about one half as long as the longer teeth 18'b.
  • the rotor 20 in the device 8 of the present invention is essentially identical to the rotor 20 discussed previously except that the rotor 20' is formed with an inverted cone-shaped deflector 36 the base of which is integral with the arm 22 of the rotor and the tip 38 extends into the suction space 25 but terminates short of the lower ends 26' of the teeth 24. As will be seen in FIG.
  • the teeth 24' on the rotor 20 are spaced a sufficient distance from the surface of the conical portion 36 of the rotor so as to provide ample space for the free flow of liquid and particles up into the suction space 25 whereby such material will be subjected to the shearing action between the teeth on the rotor and stator and propelled outwardly in a pattern as shown by the arrows in FIG. 3.
  • the conical section 36 of the rotor 20' establishes a streamlined liquid flow pattern which eliminates the eddy currents which exist in the device 8 illustrated in FIGS. 1 and 2, thus ensuring that all particles will be rapidly and efficiently circulated through the head of the device 8.
  • the lower ends 26' of the teeth 24' on the rotor are essentially coplanar with the lower ends of the longer teeth l8b on the stator, thus max imizing the amount of shearing action between the teeth at the end of the head 9.
  • a disruptor device as illustrated in FIGS. 3-5 has been constructed in which the outer diameter of the stator was 0.875 inch, the inner diameter of the stator was 0.625 inch, and the teeth on the stator were spaced apart 0.094 inch.
  • the longer teeth l8b were 0.500 inch long and the ends of the shorter teeth 18a were recessed behind the ends of the longer teeth 0.25 inch.
  • the outer diameter of the rotor 20' was 0.610 inch and the width of the teeth 24 on the rotor was 0.15 inch. It is understood of course that these dimensions are given by way of illustration only and not by limitation.
  • the device having a head of the foregoing dimensions was tested for efiiciency and reliability using the same type of tablet and solvent as was the beforementioned Willems Polytron and was found capable of completely and reliably disrupting and dissolving a tablet within the solvent within 5 seconds, as compared with the Willems Polytron which required at best 30 seconds to 2 minutes and was unreliable.
  • the effectiveness of the tablet disruptor device of the present invention is believed due to the optimizing of the head configuration in a manner to balance the conflicting requirements of providing maximum shearing surfaces between the teeth for rapidly grinding the solid particles drawn into the head while providing sufficiently large spaces between the teeth to permit large particles to enter the suction'space.
  • the use of altemating short and long teeth on the stator achieves this result.
  • fewer or larger number of teeth may be provided on the stator. For example, for smaller particles to be ground up, a larger number of teeth may be provided and may be spaced more closely together and the opposite would be the case for larger particles.
  • the rotor may carry more than two teeth, particularly where smaller particles are to be ground up by the device.
  • a device for disrupting tablets or other solid materials in a liquid comprising:
  • said rotor including a plurality of teeth extending beyond said one end of said shaft, said rotor teeth being surrounded by said series of teeth and positioned in sufficiently close radial proximity thereto so that a shearing action will be produced by said teeth on solid materials drawn into engagement with said teeth by rotation of said rotor;
  • said rotor includes a laterally extending arm mounted on said one end of said shaft symmetrically with respect to said axis, said rotor teeth being remote from the center of said am to provide a central suction space.
  • said arm is formed with an inverted conical center portion concentric with said axis and extending into said suction space.
  • telately wlth respect to the other of sand teeth of said rotor is formed with an inverted conical center said series. 6.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Medicinal Preparation (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
US00177555A 1971-09-03 1971-09-03 Tablet disruptor device Expired - Lifetime US3724765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17755571A 1971-09-03 1971-09-03

Publications (1)

Publication Number Publication Date
US3724765A true US3724765A (en) 1973-04-03

Family

ID=22649056

Family Applications (1)

Application Number Title Priority Date Filing Date
US00177555A Expired - Lifetime US3724765A (en) 1971-09-03 1971-09-03 Tablet disruptor device

Country Status (4)

Country Link
US (1) US3724765A (fr)
CA (1) CA954491A (fr)
CH (1) CH551219A (fr)
DE (1) DE2242422C3 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912236A (en) * 1973-03-01 1975-10-14 Int Labor Apparate Gmbh Emulsifying and dispersing apparatus with concentric rings of tools
US3982700A (en) * 1974-04-03 1976-09-28 Gordon David Love Mixing devices
US4307846A (en) * 1979-10-09 1981-12-29 Spelsberg Thomas C Continuous flow tissue homogenizer
US4405998A (en) * 1981-10-28 1983-09-20 Moulinex, Societe Anonyme Domestic mixer
US4738543A (en) * 1985-05-15 1988-04-19 Ystral Gmbh Device for mixing and dispersion of at least two media
US6398403B1 (en) 1998-03-21 2002-06-04 Braun Gmbh Bell-shaped shield for use on a household appliance, particularly a hand blender or a hand mixer
US6398402B1 (en) * 1998-02-11 2002-06-04 Chris Thomas Disposable disruptor agitator tool having a bladed rotor disposed in a stator
US20030206485A1 (en) * 1992-03-30 2003-11-06 Yacko Richard M. Disruptor device which eliminates cross contamination
US20040076074A1 (en) * 2002-10-16 2004-04-22 Shubeck Daniel W. Combination container, dispenser, and stirrer
US20040194636A1 (en) * 2003-04-02 2004-10-07 Huang Joseph C Mixing element with keyway attachment and mixer including mixing element
US20050058019A1 (en) * 2003-09-15 2005-03-17 Karl Jahn Combination low-shear mixer and high-shear homogenizer
US20050190642A1 (en) * 2004-02-27 2005-09-01 Ika-Werke Gmbh & Co. Kg Dispersing tool
US20060239113A1 (en) * 2002-04-16 2006-10-26 Harris Mark B Homogeniser
US20100300304A1 (en) * 2009-05-27 2010-12-02 Takashi Shimizu Stirring tool
US20110220751A1 (en) * 2008-12-16 2011-09-15 Ika-Werke Gmbh & Co. Kg Mixing device having rotor and stator
US9642494B1 (en) 2013-10-21 2017-05-09 Kevin Brun Radial immersion blender
CN112517174A (zh) * 2020-12-16 2021-03-19 中广核研究院有限公司 介质粉碎收集机
US11241661B2 (en) * 2019-04-15 2022-02-08 M. Technique Co., Ltd. Stirrer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324018A (en) * 1940-02-27 1943-07-13 Smidth & Co As F L Flotation cell
US2789800A (en) * 1952-03-12 1957-04-23 Willems Peter Mixing and dispersing devices
US2903197A (en) * 1953-08-10 1959-09-08 Willems Peter Mills, particularly granulating and colloid mills

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2324018A (en) * 1940-02-27 1943-07-13 Smidth & Co As F L Flotation cell
US2789800A (en) * 1952-03-12 1957-04-23 Willems Peter Mixing and dispersing devices
US2903197A (en) * 1953-08-10 1959-09-08 Willems Peter Mills, particularly granulating and colloid mills

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912236A (en) * 1973-03-01 1975-10-14 Int Labor Apparate Gmbh Emulsifying and dispersing apparatus with concentric rings of tools
US3982700A (en) * 1974-04-03 1976-09-28 Gordon David Love Mixing devices
US4307846A (en) * 1979-10-09 1981-12-29 Spelsberg Thomas C Continuous flow tissue homogenizer
US4405998A (en) * 1981-10-28 1983-09-20 Moulinex, Societe Anonyme Domestic mixer
US4738543A (en) * 1985-05-15 1988-04-19 Ystral Gmbh Device for mixing and dispersion of at least two media
US20030206485A1 (en) * 1992-03-30 2003-11-06 Yacko Richard M. Disruptor device which eliminates cross contamination
US6863431B2 (en) 1992-03-30 2005-03-08 Omni International, Inc. Disruptor device which eliminates cross contamination
US6398402B1 (en) * 1998-02-11 2002-06-04 Chris Thomas Disposable disruptor agitator tool having a bladed rotor disposed in a stator
US6398403B1 (en) 1998-03-21 2002-06-04 Braun Gmbh Bell-shaped shield for use on a household appliance, particularly a hand blender or a hand mixer
US20060239113A1 (en) * 2002-04-16 2006-10-26 Harris Mark B Homogeniser
US20040076074A1 (en) * 2002-10-16 2004-04-22 Shubeck Daniel W. Combination container, dispenser, and stirrer
US20040194636A1 (en) * 2003-04-02 2004-10-07 Huang Joseph C Mixing element with keyway attachment and mixer including mixing element
US7021817B2 (en) 2003-04-02 2006-04-04 Premark Feg L.L.C. Mixing element with keyway attachment and mixer including mixing element
US20050058019A1 (en) * 2003-09-15 2005-03-17 Karl Jahn Combination low-shear mixer and high-shear homogenizer
US7052172B2 (en) 2003-09-15 2006-05-30 Omni International, Inc. Combination low-shear mixer and high-shear homogenizer
US20050190642A1 (en) * 2004-02-27 2005-09-01 Ika-Werke Gmbh & Co. Kg Dispersing tool
US7056009B2 (en) * 2004-02-27 2006-06-06 Ika-Werke Gmbh & Co. Kg Dispersing tool with an inner shaft rotatable within a hollow shaft to create a pumping effect
US20110220751A1 (en) * 2008-12-16 2011-09-15 Ika-Werke Gmbh & Co. Kg Mixing device having rotor and stator
US8303162B2 (en) * 2008-12-16 2012-11-06 Ika-Werke Gmbh & Co. Kg Mixing device with stator having grooved pulverizing edges and rotor for pumping
US20100300304A1 (en) * 2009-05-27 2010-12-02 Takashi Shimizu Stirring tool
US8337072B2 (en) * 2009-05-27 2012-12-25 Kai R & D Center Co., Ltd. Stirring tool having blades supported at radially inward edge
US9642494B1 (en) 2013-10-21 2017-05-09 Kevin Brun Radial immersion blender
US11241661B2 (en) * 2019-04-15 2022-02-08 M. Technique Co., Ltd. Stirrer
CN112517174A (zh) * 2020-12-16 2021-03-19 中广核研究院有限公司 介质粉碎收集机

Also Published As

Publication number Publication date
CA954491A (en) 1974-09-10
DE2242422C3 (de) 1975-01-02
DE2242422B2 (fr) 1974-05-16
DE2242422A1 (de) 1973-03-22
CH551219A (fr) 1974-07-15

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