US Patent 6945287 Columnar seal for particle processing system

Patent 6945287 was granted and assigned to Crown Iron Works Company on September, 2005 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Patent Applicant

Current Assignee

Crown Iron Works Company

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

69452870

Patent Inventor Names

George E. Anderson0

Date of Patent

September 20, 2005

Patent Application Number

107202980

Date Filed

November 24, 2003

Patent Primary Examiner

‌

Timothy L. Maust

Patent abstract

A backflow blocker prevents backflow of gas to a lower pressure first stage of a system for processing particles from a downstream higher pressure second stage of the system. The blocker comprises an upright duct connecting the first stage to the second stage. The duct is at least partly filled with a column of particles passing from the first stage to the second stage. By properly selecting the duct dimensions and by controlling the flow rate of particles into and from the duct, the velocity of downwardly moving particles in the duct can be made to exceed the velocity at which the gasses flow through the particles in the duct. This prevents gasses from flowing from the lower pressure downstream stage to the higher pressure upstream stage.