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:
Oct. 08, 1991
Filed:
May. 24, 1989
Harold R White, New Lenox, IL (US);
Alar Engineering Corporation, Mokena, IL (US);
Abstract
This invention increases the efficiency and flow rate of rotary drum filtration and makes possible the use of such filtration for volatile and high temperature materials. According to the invention a rotary drum filter unit operates continuously in a pressure vessel and solids are intermittently discharged from the vessel. The filtered solids are scraped from the drum periphery and dropped into a trough in the vessel communicating with a discharge passageway. When the passageway is filled with solids, a shroud, driven by a reciprocating ejector traps the solids in the passageway. The ejector compacts the trapped solids forming plugs which are sequentially discharged from the pressure vessel. The filter unit is fixed to a removable end head for the pressure vessel which has a wheeled carriage riding in the vessel and the vessel in turn is carried on wheels so that when the end head is released from the vessel, the filter unit can be exposed for service such as the replacement of filter screens and cloths on the drum.