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:
May. 18, 1982
Filed:
Mar. 12, 1981
Edward Koppelman, Encino, CA (US);
Robert G Murray, Palo Alto, CA (US);
Other;
Abstract
A screw conveyor apparatus suitable for conveying and processing flowable materials such as particulate materials and slurries, for example, which incorporates cleaning or scraping elements for dislodging the accumulation of materials from the surfaces of the helical flight. The apparatus comprises an elongated housing defining a conveying chamber in which a helical flight is rotatably supported formed with a central axially extending bore through at least a portion of the length thereof and a shaft slidably disposed in the bore and reciprocable and rotatable relative to the helical flight. A series of scraper elements are mounted on the shaft adjacent to the leading and trailing surfaces of the helical flight and a drive mechanism is provided for rotating the helical flight and the shaft. A power mechanism is provided for intermittently or continuously reciprocating the shaft relative to the helical flight to effect a traversing movement of the scraper elements along the helical surfaces to effect dislodgement of any accumulated material therefrom.