Heatable centrifuge

• US 4,498,896 A
• Filed: 10/21/1975
• Issued: 02/12/1985
• Est. Priority Date: 10/24/1974
• Status: Expired due to Term

• Current Assignee: Messerschmitt-Bolkow-Blohm
• Original Assignee: Messerschmitt-Bolkow-Blohm
• Inventors: Leis, Hans
• Primary Examiner(s): Lovering, Richard D.
• Application Number:
  US05/624,263
• Time in Patent Office: 3,402 Days
• Field of Search: 233/1 R, 233/11, 233/DIG. 1, 233/26, 102/DIG. 4, 494/13, 494/14, 494/25, 494/33, 494/39, 494/81
• US Class Current: 494/14
• CPC Class Codes: B04B 15/02 for cooling, heating, or heat insulating

Abstract

A heatable centrifuge is formed of a rotor rotatable about a central axis. The rotor includes a dish shaped portion concentric to the central axis and a jacket portion extending upwardly from the outer peripheral edge of the dish shaped portion and disposed in parallel with the central axis. Preferably, the dish shaped portion is formed of an electrically insulating and heat insulating ceramic material and the jacket portion is formed of a high strength electrically conductive material. Sample containers are symmetrically arranged with the rotor supported with an insert within the jacket portion. Conductive heating members, such as electro-magnets, are arranged about the outer surface of the jacket portion for transmitting heat through the jacket portion to the material being centrifuged.

Claims

1. A heatable centrifuge comprising a rotor including a first portion and a second portion, said first portion having a central axis about which said first and second portions are rotatable, said first portion extends transversely of the central axis, said second portion is annular in shape and is secured to said first portion radially outwardly from and concentric to the central axis, said first portion being formed of an electrically insulating and heat insulating material, said second portion being formed of a high strength electrically conductive material, and means arranged for supplying heat energy to said second portion from a location exteriorly of said rotor.

2. A heatable centrifuge, as set forth in claim 1, wherein said first portion is formed of a ceramic material.

3. A heatable centrifuge, as set forth in claim 2, wherein said first portion is formed of silicon nitride.

4. A heatable centrifuge, as set forth in claim 1, wherein said first portion is a dish shaped member.

5. A heatable centrifuge, as set forth in claim 4, wherein an insert is centrally positioned in said dish shaped member on the central axis and is arranged to be connected to a rotational drive, said insert being formed of a metallic material.

14. A heatable centrifuge, as set forth in claim 1, wherein a heat radiation element encloses said rotor.

15. A heatable centrifuge, as set forth in claim 1, including means for enclosing said rotor and said means for supplying energy for carrying out the centrifuging operations under vacuum conditions.

16. A heatable centrifuge, as set forth in claim 1, including means for enclosing said rotor and said means for supplying energy for carrying out the centrifuging operations in a protective gas atmosphere.

6. A heatable centrifuge, as set forth in c1aim 4, wherein said second portion is a jacket member secured to the radially outer peripheral edge of said dish shaped member ahd extending outwardly from said dish shaped member in parallel with the central axis.

7. A heatable centrifuge, as set forth in claim 6, wherein a plurality of sample containers are located within said rotor extending inwardly from said jacket member over said dish shaped member.

8. A heatable centrifuge, as set forth in claim 7, wherein said jacket member has a projecting part extending radially outwardly from the radially outer peripheral edge of said dish shaped member and forming an inwardly facing annular shaped recess, an insert of graphite positioned within said recess in said jacket member, and said sample container embedded within said graphite.

9. A heatable centrifuge, as set forth in claim 7, wherein said jacket member has a projecting part extending radially outwardly from the radially outer peripheral edge of said dish shaped member and forming an inwardly facing annular shaped recess, an insert of silicon nitride positioned within said recess in said jacket member, and said sample container embedded within said silicon nitride.

10. A heatable centrifuge, as set forth in c1aim 6, wherein said means for supplying energy comprising a plurality of members for inductively heating said jacket member.

11. A heatable centrifuge, as set forth in claim 10, wherein said members for inductively heating comprise electromagnets symmetrically distributed around the outer surface of said jacket member and spaced angularly apart with said electromagents disposed in juxtaposition to the projecting part of said jacket member.

12. A heatable centrifuge, as set forth in claim 11, wherein said means include cooling means for said electromagnets.

13. A heatable centrifuge, as set forth in claim 12, wherein said cooling means comprise conduits positioned within said electromagnets for circulating a cooling fluid through said magnets.