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:
Jan. 11, 2005
Filed:
Dec. 18, 2001
Takayuki Sakai, Ogasa-gun, JP;
Takayuki Sakai, Ogasa-gun, JP;
Asahi Tec Corporation, , JP;
Abstract
There is provided a heat treatment unit which uses a multi-layered heat treatment furnace () comprising a layer of fluidized bed () composed of particles and another layer of atmosphere layer () composed of gases, the former being excellent in thermal efficiency and uniformity of heat distribution and the latter being positioned in the free board section over the fluidized bed (), in which these layers operate at temperature levels different from each other, and the work piece is heat-treated by being partly immersed in the fluidized bed () having a given temperature with the other part being exposed in the atmosphere layer () also operating at a given temperature, according to desired mechanical properties of the work piece at each position. This heat treatment unit is improved from the conventional one in that it can give desired mechanical properties which are required by each part of metallic work requires without increasing the investment cost.