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Publication numberUS3709429 A
Publication typeGrant
Publication date9 Jan 1973
Filing date19 Oct 1970
Priority date19 Oct 1970
Publication numberUS 3709429 A, US 3709429A, US-A-3709429, US3709429 A, US3709429A
InventorsFriedly E, Mc Kenzie D
Original AssigneeFriedly E, Mc Kenzie D
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 3709429 A
A centrifuge having a circular head horizontally mounted on a vertical rotable shaft with a resilient test tube holder mounted adjacent the head having radially disposed openings in alignment with openings in the head for frictionally engaging test tubes inserted through the openings.
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Description  (OCR text may contain errors)

United States Patent 1191 McKenzie et al. 14 1 Jan. 9, I973 [541 CENTRIFUGES 2,739,759 3/1956 Davidson et a1 ..233/26 [76] Inventors: Donald J. McKenzie; Ernest F. gggg g; 3 g g "248/314 Frledly both of 979 Miller Street l Den er Co 2 5 2,729,080 1/1956 Bennett 1 l ..248/3l4 X [22] Filed: Oct. 19, 1970 Primary Examiner-Jordan Franklin Assistant Examiner-George H. Krizmanich [21] Appl' SL717 Attorney-Enloe Wilkinson [52] US. Cl ..233/26, 211/74 [57] ABSTRACT [51] Int. Cl. ..B04b 9/12 A centnfuge havmg a circular head horizontally [58] new of Search "233/1 24 mounted on a vertical rotable shaft with a resilient test tube holder mounted adjacent the head having radially disposed openings in alignment with openings in the [56] References Cited head for frietionally engaging test iubes inserted UNITED STATES PATENTS through the Openings- 3,361,343 1/1968 Lerner ..233/26 4 Claims, 2 Drawing Figures PATENTEDJAN 9:915

1 x'llllllll'llllllllll INVENTORS. ERNEST E FRIEDLY DONALD J. MCKENZIE ATTORNEY CENTRIFUGES This invention relates to centrifuges and more particularly to centrifuges of the type used in laboratories where samples of materials are subject to centrifugal action for analysis or testing. Usually test tubes or similar vessels are mounted in radially disposed slots in a rotatable centrifuge head which permit the test tubes to assume an angular position to the axis of rotation when in motion and to return to a substantially vertical position when at rest.

In such centrifuges each test tube must be removed individually for emptying or cleansing.

It is therefore an object of the present invention to provide a tube holder which is removably mounted on a rotable centrifuge. head.

Another object is to provide a centrifuge having a holder which will retain the tubes in the head when the head is inverted for removing the contents of the tubes.

A further object is to provide an improved centrifuge having a tube holder which may be easily applied to a centrifuge head.

Another object is to provide a centrifuge which has a tube holder which is simple in construction and economical to manufacture.

With these and other objects in view, the invention may consist of certain novel features as will be more fully described and particularly pointed out in the specification, claims and drawings appended hereto.

In the drawings, in which like references are used to designate like parts,

FIG. 1 is a top plan view of a rotatable centrifuge head with the tube holder attached to the underside and showing portions of the holder in broken lines.

FIG. 2 is a partial cross section of the device shown in FIG. 1 taken on the lines 2 2 of FIG. 1 looking in the direction of the arrows and showing one of the tubes in broken lines positioned in the head and holder.

Referring to the drawings more in detail the centrifuge head is indicated at 10. This is usually a circular metal plate which is removably connected to a driven rotatable shaft 11.

The head may be secured to the shaft 11 by screws or bolts 12 which also engage the holder 13 which is made of a resilient material, and secure them both to the rotatable shaft 11. The head and holder may be otherwise keyed to the shaft in any suitable manner.

The tube holder 13 snaps onto the underside of the head 10 and has an upstanding peripheral rim or flange 14 which engages the peripheral edge of the head 10. The rim 14 has spaced, inwardly extending portions 15 which overlay the outer margin of the head and clamp the holder to the head.

The head 10 has radially disposed elongated openings 16 through which the test tubes 17 extend. These openings permit the tubes to swing outwardly as the head is rotated by the shaft 11. The holder 13 has circular openings 18 in alignment with the elongated openings 16 in the head. These openings have a diameter slightly less than the width of the elongated openings 16 in the head 10 and less than the diameter of the tube 17;

The holder 13 has arcuate, oppositely disposed slits l9 and 20. The centers of the arcuate slits pass through the outer periphery of the circular openings 18 in the holder 13 fprmiiag flaps 21, 22 23 and 24 in the holder. As shown in Fl 2, a test tube 17, shown in broken lines is inserted through the elongated opening 16 in the head 10 and through the aligned circular opening 18 in the holder 13. Since the openings 18 in the holder have a diameter slightly less than that of the tube 17, the tube pushes against the flaps forcing them downwardly and the flaps frictionally engage the side of the tube as shown in FIG. 2.

The tubes 17 may be individually removed from the head 10 and holder 13 by lifting them upwardly. In

order to empty all of the tubes at one time by tilting or inverting them, the screws or bolts 12 are removed and the head 10 together with the holder 13 are removed fromthe shaft 11. The head 10 and holder 13 together with tubes 17 may then befinverted and the tubes will not fall out of the holder 13 which is clamped to the head by the portions 15 which overlay the head.

It is to be understood that this disclosure is by way of illustration and not limitation and that various other embodiments of the invention will become apparent to those skilled in the art without departing from the scope of the claims and spirit of the invention.

We claim:

1. A centrifuge comprising a circular head horizontally mounted on a vertical rotatable shaft, said head having elongated radially disposed. openings for receiving test tubes and a resilient test tube holder secured beneath said head having circular openings in central alignment with the openings in said head, said circular openings having a diameter less then the width of theopenings in the head, said holder having flap portions adjacent the circular openings therein.

2. A centrifuge as defined in claim 1 wherein the holder has oppositely disposed arcuate slits adjacent the circular forming said flaps.

3. A centrifuge as defined in claim 1 wherein the holder has an upstanding peripheral rim co-extensive with and adjacent the peripheral edge of said head.

4. A centrifuge as defined in claim 3 wherein the upper edge of the upstanding peripheral rim has spaced inwardly extending portions overlaying the upper surface of the head.

a: a: t

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2729080 *7 Feb 19523 Jan 1956Dixie Cup CoPaper cup holder
US2739759 *28 Sep 195427 Mar 1956Clay Adams IncCentrifuge
US2956687 *19 Nov 195818 Oct 1960Mabel A RobichaudBottle holder
US3361343 *1 Nov 19652 Jan 1968Irwin S. LernerHematological centrifuge
US3603551 *20 May 19697 Sep 1971Peterson Darwin HToolholding device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3889452 *18 Apr 197317 Jun 1975Package King IncApparatus for preloading a tray and transferring the preloaded material to a sealing fixture for heat sealing
US3980227 *8 Nov 197414 Sep 1976Baxter Travenol Laboratories, Inc.Adjustable rotator for fluid samples
US4055396 *22 Mar 197625 Oct 1977G. D. Searle & Co.Tray and carrier assembly
US4057148 *17 Jul 19758 Nov 1977G. D. Searle & Co.Multiple sample support assembly and apparatus for facilitating radioimmunoassays and the like
US4301964 *24 Jan 198024 Nov 1981Beckman Instruments, Inc.Swinging tube holder
US4347879 *27 Mar 19817 Sep 1982Blaser Anton JBottle neck coupling device
US4930532 *17 Feb 19895 Jun 1990Ipco CorporationBeaker holder for use with ultrasonic cleaning device
US5047210 *12 Dec 198810 Sep 1991Melet Schloesing LaboratoriesDevice for presenting receptacles
US5074505 *1 Jun 199024 Dec 1991Akzo N.V.Support attachment for holding bottles within a bottle block
US5133939 *21 Mar 199128 Jul 1992Barnstead Thermolyne CorporationTest tube holder and tray assembly
US5137693 *30 Jul 199011 Aug 1992Miles Inc.Spring biased test tube holder
US5472110 *10 Mar 19945 Dec 1995Rubbermaid IncorporatedStorage container for tools
US5941274 *28 Nov 199824 Aug 1999Fox; Peter M.Method and apparatus for securing a fire hydrant or other valve devices
US5993745 *4 Mar 199830 Nov 1999Roche Diagnostics CorporationArchival storage tray for multiple test tubes
US6001310 *10 Oct 199714 Dec 1999Shaffer; John V.Pliable centrifuge tube array
US6474481 *8 Jun 20015 Nov 2002Yung-Yuan LiuFlexible tool storage device
US6533133 *18 May 200118 Mar 2003Jun-Tai LiuTest tube rack with inserting structure
US959768921 Jul 200621 Mar 2017Eppendorf AgContainer holder
US20090188823 *24 Jan 200530 Jul 2009Morten ZwergiusDrill bit holder/bit change-over device
DE102005035335A1 *28 Jul 20051 Feb 2007Eppendorf AgGefäßhalter
DE102005035335B4 *28 Jul 200531 Oct 2012Eppendorf AgGefäßhalter
DE202007006719U110 May 200723 Oct 2008Ass Elektronik GmbhVorrichtung zum Einsetzen von Behältnissen, insbesondere Reagenzgläser, in Behältnisse, insbesondere Reagenzglasträger
EP0296254A1 *20 Jun 198728 Dec 1988Eppendorf-Netheler-Hinz GmbhCentrifuge rotor
U.S. Classification494/16, 211/74
International ClassificationB04B5/04, B04B5/00
Cooperative ClassificationB04B5/0414
European ClassificationB04B5/04B2