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:
Aug. 15, 1978
Filed:
Dec. 01, 1976
Toshikatsu Haga, Iwaki, JP;
Saburo Hori, Iwaki, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Nihonbashi, JP;
Abstract
Hot gas is introduced into a heat treatment furnace 10 through a plurality of nozzles 11 on the furnace wall to form a conical, downwardly swirling gas flow which is convergent at the top and divergent at the bottom. Such a gas flow pattern both heats the bed below, and acts to contain and oxidize any particles blown or splashed up out of the bed. Exhaust gas is discharged up through the conical apex of the swirling flow. The downward angle .alpha. that each nozzle axis forms with the vertical furnace wall is defined by 0<.alpha..ltoreq.30.degree., and the inclination angle .beta. of each nozzle axis with a horizontal line tangent to the furnace circumference is defined by 45.degree..ltoreq..beta..ltoreq.85.degree..