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. 30, 2002
Filed:
Jul. 10, 2001
Piergiorgio Fontana, Genoa, IT;
SMS Demag S.p.A., Genon, IT;
Abstract
Discharge screw ( ) for a moving hearth, and in particular for an annular rotary hearth ( ) of a reheat furnace for the heat treatment of loose materials, comprising a cylinder ( ) arranged above and substantially radially with respect to this annular hearth ( ) and turned by suitable actuators ( ) so as to discharge the materials from the edges of this annular hearth ( ); this cylinder ( ) comprises on its lateral surface a first series of helicoids ( ) beginning in an area close to its outermost end with respect to the furnace and a second series of helicoids ( ) beginning at its innermost end with respect to the furnace; the inclination of the helicoids ( ) of this first series is essentially symmetrical to the inclination of the helicoids ( ) of this second series; and in this screw ( ) each helicoid ( ) of one series comprises an inward end that meets the inward end of a corresponding helicoid ( ) of the other series in such a way that at at least one of the abovementioned ends a free final section is left for the removal of loose materials from an area underneath it on the annular hearth ( ).