|Publication number||US3709429 A|
|Publication date||9 Jan 1973|
|Filing date||19 Oct 1970|
|Priority date||19 Oct 1970|
|Publication number||US 3709429 A, US 3709429A, US-A-3709429, US3709429 A, US3709429A|
|Inventors||Friedly E, Mc Kenzie D|
|Original Assignee||Friedly E, Mc Kenzie D|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (23), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 1191 McKenzie et al. 14 1 Jan. 9, I973 [541 CENTRIFUGES 2,739,759 3/1956 Davidson et a1 ..233/26  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  Filed: Oct. 19, 1970 Primary Examiner-Jordan Franklin Assistant Examiner-George H. Krizmanich  Appl' SL717 Attorney-Enloe Wilkinson  US. Cl ..233/26, 211/74  ABSTRACT  Int. Cl. ..B04b 9/12 A centnfuge havmg a circular head horizontally  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  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.
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
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2729080 *||7 Feb 1952||3 Jan 1956||Dixie Cup Co||Paper cup holder|
|US2739759 *||28 Sep 1954||27 Mar 1956||Clay Adams Inc||Centrifuge|
|US2956687 *||19 Nov 1958||18 Oct 1960||Mabel A Robichaud||Bottle holder|
|US3361343 *||1 Nov 1965||2 Jan 1968||Irwin S. Lerner||Hematological centrifuge|
|US3603551 *||20 May 1969||7 Sep 1971||Peterson Darwin H||Toolholding device|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3889452 *||18 Apr 1973||17 Jun 1975||Package King Inc||Apparatus for preloading a tray and transferring the preloaded material to a sealing fixture for heat sealing|
|US3980227 *||8 Nov 1974||14 Sep 1976||Baxter Travenol Laboratories, Inc.||Adjustable rotator for fluid samples|
|US4055396 *||22 Mar 1976||25 Oct 1977||G. D. Searle & Co.||Tray and carrier assembly|
|US4057148 *||17 Jul 1975||8 Nov 1977||G. D. Searle & Co.||Multiple sample support assembly and apparatus for facilitating radioimmunoassays and the like|
|US4301964 *||24 Jan 1980||24 Nov 1981||Beckman Instruments, Inc.||Swinging tube holder|
|US4347879 *||27 Mar 1981||7 Sep 1982||Blaser Anton J||Bottle neck coupling device|
|US4930532 *||17 Feb 1989||5 Jun 1990||Ipco Corporation||Beaker holder for use with ultrasonic cleaning device|
|US5047210 *||12 Dec 1988||10 Sep 1991||Melet Schloesing Laboratories||Device for presenting receptacles|
|US5074505 *||1 Jun 1990||24 Dec 1991||Akzo N.V.||Support attachment for holding bottles within a bottle block|
|US5133939 *||21 Mar 1991||28 Jul 1992||Barnstead Thermolyne Corporation||Test tube holder and tray assembly|
|US5137693 *||30 Jul 1990||11 Aug 1992||Miles Inc.||Spring biased test tube holder|
|US5472110 *||10 Mar 1994||5 Dec 1995||Rubbermaid Incorporated||Storage container for tools|
|US5941274 *||28 Nov 1998||24 Aug 1999||Fox; Peter M.||Method and apparatus for securing a fire hydrant or other valve devices|
|US5993745 *||4 Mar 1998||30 Nov 1999||Roche Diagnostics Corporation||Archival storage tray for multiple test tubes|
|US6001310 *||10 Oct 1997||14 Dec 1999||Shaffer; John V.||Pliable centrifuge tube array|
|US6474481 *||8 Jun 2001||5 Nov 2002||Yung-Yuan Liu||Flexible tool storage device|
|US6533133 *||18 May 2001||18 Mar 2003||Jun-Tai Liu||Test tube rack with inserting structure|
|US9597689||21 Jul 2006||21 Mar 2017||Eppendorf Ag||Container holder|
|US20090188823 *||24 Jan 2005||30 Jul 2009||Morten Zwergius||Drill bit holder/bit change-over device|
|DE102005035335A1 *||28 Jul 2005||1 Feb 2007||Eppendorf Ag||Gefäßhalter|
|DE102005035335B4 *||28 Jul 2005||31 Oct 2012||Eppendorf Ag||Gefäßhalter|
|DE202007006719U1||10 May 2007||23 Oct 2008||Ass Elektronik Gmbh||Vorrichtung zum Einsetzen von Behältnissen, insbesondere Reagenzgläser, in Behältnisse, insbesondere Reagenzglasträger|
|EP0296254A1 *||20 Jun 1987||28 Dec 1988||Eppendorf-Netheler-Hinz Gmbh||Centrifuge rotor|
|U.S. Classification||494/16, 211/74|
|International Classification||B04B5/04, B04B5/00|