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:
Jun. 08, 1976
Filed:
Sep. 09, 1974
John C Walsh, Winchester, MA (US);
The De Laval Separator Company, Poughkeepsie, NY (US);
Abstract
The material to be evaporated is continuously fed into a stationary vertical cylinder where it is heated to a boiling condition through the cylinder wall while scraping material from said wall and while rotating the material about a vertical axis to maintain an upwardly opening cavity therein. Vapors drawn from the cavity to concentrate the material are passed through a first path; and concentrated material is displaced through a second path along part of the cylindrical surface while in a cooled condition to arrest the boiling and while maintaining the two paths separated. The discharge pressure of the concentrated material is increased by imposing a substantial resistance to its rotation in the second path; and to permit control of the evaporation, a sensing device is inserted in the second path to indicate changes in the temperature of the discharging concentrated material, which is substantially free of vapor.