The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 1992
Filed:
Nov. 27, 1990
Lewis S Smith, Fairport, NY (US);
Henry T Mastalski, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. An impact target is mounted within the grinding chamber and centered on the chamber's central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the center of the impact target. In another embodiment, a fluidized bed jet mill has a grinding chamber with a peripheral wall, a base, and a central axis. Multiple sources of high velocity gas are mounted in the peripheral wall of the grinding chamber, are arrayed symmetrically about the central axis, and are oriented to direct high velocity gas along an axis intersecting the central axis of the grinding chamber. Each of the gas sources has a nozzle holder, a nozzle mounted in one end of the holder oriented toward the grinding region, and an annular accelerator tube mounted concentrically about said nozzle holder. The end of the accelerator tube closer to the nozzle is larger in diameter than the nozzle holder and the opposite end of the accelerator tube. The accelerator tube and the nozzle holder define between them an annular opening through which particulate material in the grinding chamber can enter and be entrained with the flow of gas from the nozzle and accelerated within the accelerator tube to be discharged toward the central axis. These embodiments can be combined for further efficiency enhancement.