US3752390A - Swinging bucket rotor assembly - Google Patents

Swinging bucket rotor assembly Download PDF

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Publication number
US3752390A
US3752390A US00240968A US3752390DA US3752390A US 3752390 A US3752390 A US 3752390A US 00240968 A US00240968 A US 00240968A US 3752390D A US3752390D A US 3752390DA US 3752390 A US3752390 A US 3752390A
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US
United States
Prior art keywords
rotor
bucket
hanger
cavity
pocket
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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
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US00240968A
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English (en)
Inventor
S Chulay
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Beckman Coulter Inc
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Beckman Instruments Inc
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Filing date
Publication date
Application filed by Beckman Instruments Inc filed Critical Beckman Instruments Inc
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Publication of US3752390A publication Critical patent/US3752390A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
    • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
    • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
    • B04B5/0421—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted

Definitions

  • ABSTRACT 9 Claims 6 Drawing Figures Patented Aug. 14, 1973 2 Shets-Sheet 2 1 SWINGING BUCKETROTOR ASSEMBLY BACKGROUND OF THE INVENTION
  • This invention relates generally to high speed swinging bucket centrifuge rotor assemblies and more particularly to a centrifuge rotor assembly including a hanger disposed in a rotor head cavity which is formed to receive and guide a bucket cap hook onto the hanger for securely supporting and guiding the associated bucket.
  • Swinging bucket centrifuge rotor assemblies have included rotor heads with cavities each provided with cross pins which are inserted in the head to engage a bucket support and removed to disengage the bucket from the head.
  • the bucket includes ears with holes through which the cross pin passes to swingingly support the bucket.
  • hangers have been constructed to dispose a cross pin or cross pin support in the cavity.
  • the bucket or its cap is provided with hooks which are spaced apart a distance greater than the tube carried by the bucket. This designis subject to either improper hooking or to dislodging during movement of the rotor.
  • Another type of rotor employs a cross pin at the end of an elongated hanger. However, this rotor requires complex machining to assure proper functioning of the hanger and hook.
  • 'It is a further object of the present invention to provide a centrifuge rotor assembly in which a hanger supports the bucket and serves as a spring as the bucket swings from the vertical to the horizontal position duringcentrifuge operation and guides the bucket cap as the bucket swings to the horizontal position.
  • One part serves to guide the bucket cap towards a slot which guides the cap onto the cross pin where it is securely held on the cross pin.
  • the slot also provides a guide for thebucket as it swings about the cross pin during a centrifuge operation.
  • a centrifuge rotor including a plurality of bucket receiving cavities with means in said cavities for supporting the bucket in a vertical position and allowing the bucket to swing into a horizontal position during centrifugation.
  • Each of said cavities includes a pocket provided with a cross pin and having a slotted wall with the slot adapted to receive a relatively flat budket cap to guide the same onto the pin and guide the bucket cap during swinging movement of the bucket from the vertical to the horizontal position.
  • FIG. 1 is an elevational view of a rotor in accordance with the present invention.
  • FIG. 2 is a sectional view taken along the line 2-2 of FIG. 1.
  • FIG. 3 is an enlarged view taken along the lines 3-3 of FIG. 1.
  • FIG. 4 is an enlarged view showing the deflection of the cross pin holder during centrifuge operation.
  • FIG. Sis a view taken along the line 5-5 of FIG. 3.
  • FIG. 6 is a sectional view of the centrifuge rotor assembly showing the cavity and supported swinging bucket.
  • the rotor comprises a body 11 which is provided with a plurality of cavities 12 which accommodate swinging buckets 13.
  • FIG. 1 shows the rotor in its stationary condition with the buckets 13 depending vertically downward.
  • FIG. 6 shows the rotor assembly under centrifugation with the swinging bucket 13 in the horizontal position.
  • the bucket shoulder 14 is seated against the rotor seat 16 to limit outward movement of the bucket during centrifugation.
  • an improved hanger assembly for the swinging buckets.
  • the assembly includes a hanger 17, FIGS. 2, 3, 4 and 5, having an. elongated body 18 with a cross pin 19 secured at the lower end.
  • the hanger body 18 is disposed in hole 20 extending through the rotor parallel to and spaced from the axis of the rotor.
  • the cross pin is engaged by the bucket cap hooks to support the bucket.
  • the body 18 also serves as a spring which deflects, as indicated in FIG. 4, when centrifugal forces act on the bucket whereby the bucket seats against the rotor seat.
  • the cross pin 19 has its ends 21, FIG.
  • the hanger is positioned axially in the hole 20 by means of a screw 26 which screws into the threaded hole 27 at the top of the hanger body 18.
  • the hanger body is split at 28 whereby when the screw is threaded into the hole, it expands the upper end of the body and locks the hanger in the rotor.
  • an improved bucket cap 30 which has a flat stern portion with the upper hooked end slotted 31 to form a pair of spaced hooks or tangs 32 which serve to straddle the body 18. It is impossible to attach the bucket assembly to the cross pin with only one of two hooks engaged. The cooperation between the slot 31 and body 18 serves to guide the bucket as it swings from the horizontal to the vertical position.
  • cavities 12 each include a pocket 23 formed by a simple machine operation and which is concentric to the hanger stern and hole 20.
  • Cavity 12 also includes an adjacent cut or well 37 which serves as a guide to guide hooks or tangs 32 of the bucket cap as the bucket is inserted in the rotor cavity.
  • the wall separating the pocket 23 and well 37 is slotted to form slot 38.
  • the slot width is slightly wider than the width across the outside tangs 32 whereby it guides the hook inwardly to assure that the spaced tangs straddle the hanger body 18.
  • the slot cooperates with the hanger body 18 to guide the bucket as it swings.
  • the depth of the pocket 23 is controlled to provide a minimum clearance above the cross pin to minimize the possibility of unhooking when the rotor is moved about.
  • an improved swinging bucket centrifuge assembly in which the rotor cavities and bucket caps cooperate to guide the bucket cap to easily engage the hanger pin and which guide the rotor cap as the bucket swings.
  • the bucket cap is shaped to provide a firm grip to unscrew the cap from the associated bucket without the need for a tool.
  • the entire rotor assembly occupies a minimum space making available more load carrying capacity.
  • a centrifuge rotor of the type including a rotor head having a plurality of cavities configured for receiving buckets having enlarged shoulders and means in each of said cavities for supporting a bucket by a bucket cap having hook means, the bucket being supported in a vertical position and being allowed to swing into a horizontal position where the shoulder seats on a portion of said cavity during centrifugation the improvement comprising for each cavity a pocket formed within said cavity for receiving at least a portion of said hook means, a hole for retaining the bucket supporting means, said hole extending through the rotor spaced from and parallel to the axis of the rotor communicating with said pocket, a well formed within said cavity and spaced radially outwardly from the pocket forming a portion of said rotor therebetween, and a slot in that portion of the rotor, said slot having a width sufficient for passage therethrough of the hook means of the bucket cap.
  • a centrifuge rotor assembly of the type including a rotor body having a plurality of bucket receiving cavities and pin means in said cavities adapted to support an associated bucket in a vertical position and allowing it to swing into a horizontal position where it moves outwardly to seat on a portion of said cavity during a centrifugation operation the improvement comprising for each cavity a pocket formed within said cavity, a hole extending through the rotor spaced from and parallel to the axis of the rotor communicating with said pocket, a well formed within said cavity and spaced radially outwardly of the rotor axis, said rotor being slotted for forming a guide slot extending between said pocket and well, said pin means including an elongated hanger extending through said hole with one end disposed in said pocket and a cross pin secured to said one end of the hanger, said cross pin including end portions shaped for seating on the adjacent wall portions of said pocket under the action of centrifugal force.
  • a centrifuge rotor assemblyof the type including a rotor body having a plurality of cavities configured for receiving buckets having enlarged shouders and pin means in said cavities adapted to support an associated bucket in a vertical position and allowing it to swing into a horizontal position where the shoulder seats on a portion of said cavity during centrifugation the improvement comprising for each cavity a generally cylindrical pocket formed within said cavity, a hole extending through the rotor spaced from and parallel to the axis of the rotor communicating generally centrally with said pocket, a well formed within said cavity and spaced radially outwardly from said pocket forming a portion of said rotor therebetween, a guide slot cut into said portion, said pin means being secured within said hole and extending into said pocket, and a bucket cap including at least one hook engaging said pin means to support the bucket, said hook including a flat stem portion adapted to cooperate with said guide slot to guide the stem portion.
  • a rotor assembly as in claim 4 wherein said hole has a substantially uniform cross section and said hanger is tapered downwardly with the upper portion thereof having approximately the same cross-section as said hole, said boss being disposed adjacent the lower edge of said hole.

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  • Centrifugal Separators (AREA)
US00240968A 1972-04-04 1972-04-04 Swinging bucket rotor assembly Expired - Lifetime US3752390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24096872A 1972-04-04 1972-04-04

Publications (1)

Publication Number Publication Date
US3752390A true US3752390A (en) 1973-08-14

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Application Number Title Priority Date Filing Date
US00240968A Expired - Lifetime US3752390A (en) 1972-04-04 1972-04-04 Swinging bucket rotor assembly

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US (1) US3752390A (xx)
JP (1) JPS5028676B2 (xx)
CA (1) CA957668A (xx)
CH (1) CH550611A (xx)
FR (1) FR2178904B1 (xx)
GB (1) GB1415600A (xx)
IT (1) IT979244B (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935995A (en) * 1975-05-07 1976-02-03 E. I. Du Pont De Nemours And Company Swinging bucket centrifuge rotor
US3997105A (en) * 1975-04-11 1976-12-14 E. I. Du Pont De Nemours And Company Swinging bucket centrifuge rotor
US4254905A (en) * 1978-04-05 1981-03-10 Heraeus Christ Gmbh Centrifuge rotor construction
WO1985005569A1 (en) * 1984-06-04 1985-12-19 Beckman Instruments, Inc. Centrifuge rotor and method of assembly
US4585433A (en) * 1984-10-01 1986-04-29 E. I. Du Pont De Nemours And Company Sample container for a top loading swinging bucket centrifuge rotor
US4589864A (en) * 1984-11-05 1986-05-20 E. I. Du Pont De Nemours And Company Centrifuge rotor having a resilient trunnion
EP0186863A2 (en) * 1984-12-21 1986-07-09 E.I. Du Pont De Nemours And Company A centrifuge rotor having a flexible carrier with restoring cap assembly
US4624655A (en) * 1984-12-21 1986-11-25 E. I. Du Pont De Nemours And Company Restoring cap assembly for a centrifuge rotor having a flexible carrier
US4659325A (en) * 1984-12-21 1987-04-21 E. I. Du Pont De Nemours And Company Centrifuge rotor having a flexible carrier
EP0224955A1 (en) * 1985-11-15 1987-06-10 Ultra-Centrifuge Nederland N.V. Centrifuge, in particular for biomedical use
US4832678A (en) * 1987-12-03 1989-05-23 E. I. Du Pont De Nemours And Company Adapter for a centrifuge tube and a removal tool therefor
US5496255A (en) * 1994-12-09 1996-03-05 Beckman Instruments, Inc. Swinging bucket centrifugation rotor with conforming bucket seat
US5591114A (en) * 1995-12-15 1997-01-07 Sorvall Products, L.P. Swinging bucket centrifuge rotor
US5624370A (en) * 1995-12-15 1997-04-29 Sorvall Products, L.P. Bucket for use in a swinging bucket centrifuge rotor
WO1999046047A2 (en) * 1998-03-10 1999-09-16 Large Scale Proteomics Corporation Detection and characterization of microorganisms
EP1498182A1 (de) * 2003-07-14 2005-01-19 Andreas Hettich GmbH & Co. KG Verschlussvorrichtung für ein Zentrifugenröhrchen
WO2005074662A2 (en) * 2004-01-30 2005-08-18 Gabor Lederer A centrifuge apparatus and system, and method for operating the same
US20080105998A1 (en) * 2006-11-03 2008-05-08 R&D Green Materials, Llc Process for Preparing Biodegradable Articles
US20110183829A1 (en) * 2010-01-25 2011-07-28 Hitachi Koki Co., Ltd. Centrifugal separator and swing rotor for centrifugal separator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744638Y2 (xx) * 1975-11-29 1982-10-01
JPS6098384U (ja) * 1983-12-12 1985-07-04 株式会社　山長 加工たらこ
JPH0198461A (ja) * 1987-10-12 1989-04-17 Hayashikane Sangyo Kk らせん状の形状を有するソーセージ及びその製造方法
JPH0253460A (ja) * 1988-08-18 1990-02-22 Yoshiyasu Nishizaki ソーセージの製造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894010C (de) * 1951-03-30 1953-10-22 Paul Funke & Co Zentrifuge fuer Butyrometer
DE925817C (de) * 1951-07-18 1955-03-31 Feinmechanik Vormals Jetter & Zentrifuge, deren Gehaenge aus gabelfoermigen Haltern mit darin schwenkbar gelagerten Behaeltern besteht
US3028075A (en) * 1959-01-12 1962-04-03 Sorvall Inc Ivan Swinging bucket centrifuge
US3377021A (en) * 1965-05-17 1968-04-09 Internat Equipment Company Centrifuge rotors, buckets and combinations of such buckets and rotors
US3393864A (en) * 1966-04-11 1968-07-23 Beckman Instruments Inc Centrifuge apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE894010C (de) * 1951-03-30 1953-10-22 Paul Funke & Co Zentrifuge fuer Butyrometer
DE925817C (de) * 1951-07-18 1955-03-31 Feinmechanik Vormals Jetter & Zentrifuge, deren Gehaenge aus gabelfoermigen Haltern mit darin schwenkbar gelagerten Behaeltern besteht
US3028075A (en) * 1959-01-12 1962-04-03 Sorvall Inc Ivan Swinging bucket centrifuge
US3377021A (en) * 1965-05-17 1968-04-09 Internat Equipment Company Centrifuge rotors, buckets and combinations of such buckets and rotors
US3393864A (en) * 1966-04-11 1968-07-23 Beckman Instruments Inc Centrifuge apparatus

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997105A (en) * 1975-04-11 1976-12-14 E. I. Du Pont De Nemours And Company Swinging bucket centrifuge rotor
US3935995A (en) * 1975-05-07 1976-02-03 E. I. Du Pont De Nemours And Company Swinging bucket centrifuge rotor
US4254905A (en) * 1978-04-05 1981-03-10 Heraeus Christ Gmbh Centrifuge rotor construction
WO1985005569A1 (en) * 1984-06-04 1985-12-19 Beckman Instruments, Inc. Centrifuge rotor and method of assembly
US4585433A (en) * 1984-10-01 1986-04-29 E. I. Du Pont De Nemours And Company Sample container for a top loading swinging bucket centrifuge rotor
EP0181582A2 (en) * 1984-11-05 1986-05-21 E.I. Du Pont De Nemours And Company Centrifuge rotor having a resilient trunnion
US4589864A (en) * 1984-11-05 1986-05-20 E. I. Du Pont De Nemours And Company Centrifuge rotor having a resilient trunnion
EP0181582A3 (en) * 1984-11-05 1987-05-13 E.I. Du Pont De Nemours And Company Centrifuge rotor having a resilient trunnion
EP0186863A2 (en) * 1984-12-21 1986-07-09 E.I. Du Pont De Nemours And Company A centrifuge rotor having a flexible carrier with restoring cap assembly
US4624655A (en) * 1984-12-21 1986-11-25 E. I. Du Pont De Nemours And Company Restoring cap assembly for a centrifuge rotor having a flexible carrier
US4659325A (en) * 1984-12-21 1987-04-21 E. I. Du Pont De Nemours And Company Centrifuge rotor having a flexible carrier
EP0186863A3 (en) * 1984-12-21 1987-12-02 E.I. Du Pont De Nemours And Company A centrifuge rotor having a flexible carrier with restoring cap assembly
EP0224955A1 (en) * 1985-11-15 1987-06-10 Ultra-Centrifuge Nederland N.V. Centrifuge, in particular for biomedical use
US4769000A (en) * 1985-11-15 1988-09-06 Ultra-Centrifuge Nederland N.V. Centrifuge, in particular for biomedical use
US4832678A (en) * 1987-12-03 1989-05-23 E. I. Du Pont De Nemours And Company Adapter for a centrifuge tube and a removal tool therefor
US5496255A (en) * 1994-12-09 1996-03-05 Beckman Instruments, Inc. Swinging bucket centrifugation rotor with conforming bucket seat
US5591114A (en) * 1995-12-15 1997-01-07 Sorvall Products, L.P. Swinging bucket centrifuge rotor
US5624370A (en) * 1995-12-15 1997-04-29 Sorvall Products, L.P. Bucket for use in a swinging bucket centrifuge rotor
WO1999046047A2 (en) * 1998-03-10 1999-09-16 Large Scale Proteomics Corporation Detection and characterization of microorganisms
WO1999046047A3 (en) * 1998-03-10 1999-12-02 Biosource Proteomics Inc Detection and characterization of microorganisms
US20050011894A1 (en) * 2003-07-14 2005-01-20 Guenter Eberle Closure device for a centrifuge tube
EP1498182A1 (de) * 2003-07-14 2005-01-19 Andreas Hettich GmbH & Co. KG Verschlussvorrichtung für ein Zentrifugenröhrchen
WO2005074662A2 (en) * 2004-01-30 2005-08-18 Gabor Lederer A centrifuge apparatus and system, and method for operating the same
WO2005074662A3 (en) * 2004-01-30 2005-11-10 Gabor Lederer A centrifuge apparatus and system, and method for operating the same
US20080105998A1 (en) * 2006-11-03 2008-05-08 R&D Green Materials, Llc Process for Preparing Biodegradable Articles
WO2008058036A1 (en) * 2006-11-03 2008-05-15 R & D Green Materials, Llc Process for preparing biodegradable articles
US8535591B2 (en) 2006-11-03 2013-09-17 Green Materials, Llc Process for preparing biodegradable articles
US20110183829A1 (en) * 2010-01-25 2011-07-28 Hitachi Koki Co., Ltd. Centrifugal separator and swing rotor for centrifugal separator
US8821361B2 (en) * 2010-01-25 2014-09-02 Hitachi Koki Co., Ltd. Centrifugal separator and swing rotor for centrifugal separator

Also Published As

Publication number Publication date
DE2311234A1 (de) 1973-10-18
GB1415600A (en) 1975-11-26
JPS498861A (xx) 1974-01-25
JPS5028676B2 (xx) 1975-09-17
CH550611A (de) 1974-06-28
IT979244B (it) 1974-09-30
FR2178904A1 (xx) 1973-11-16
DE2311234B2 (de) 1977-03-10
CA957668A (en) 1974-11-12
FR2178904B1 (xx) 1976-11-05

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