Method and apparatus for making uniform pellets for fusion reactors
Patent 4017290 Issued on April 12, 1977. Estimated Expiration Date: 
April 12, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 12, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2676892 3171714 3350213 3365315 InventorsAssigneeApplicationNo. 05/463860 filed on 04/15/1974US Classes:65/21.4, Hollow or porous particle264/15, SPHEROIDIZING OR ROUNDING OF SOLID PARTICLES264/43, Including vitrification or firing264/54, Chemical blowing425/4C, Continuously65/141, MELT DISINTEGRATOR AND SOLIDIFIER INCLUDING FLUID-MELT CONTACT MEANS65/142, PARTICULATE BEAD OR BALL MAKING APPARATUS (E.G., PIN HEADING)65/22With pore forming in situExaminersPrimary: Lindsay, Robert L.Attorney, Agent or FirmAbstractA method and apparatus for making uniform pellets for laser driven fusion reactors which comprises selection of a quantity of glass frit which has been accurately classified as to size within a few micrometers and contains an occluded material, such as urea, which gasifies and expands when heated. The sized particles are introduced into an apparatus which includes a heated vertical tube with temperatures ranging from 800° C to 1300° C. The particles are heated during the drop through the tube to molten condition wherein the occluded material gasifies to form hollow microspheres which stabilize in shape and plunge into a collecting liquid at the bottom of the tube. The apparatus includes the vertical heat resistant tube, heaters for the various zones of the tube and means for introducing the frit and collecting the formed microspheres. | |
