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:
Dec. 03, 2002
Filed:
Apr. 27, 2001
Toshiyasu Koda, Nagano-ken, JP;
Suinobu Kubota, Nagano-ken, JP;
Yuji Hayashi, Nagano-ken, JP;
Mamoru Miyagawa, Nagano-ken, JP;
Nissei Plastic Industrial Co., Ltd., Nagano-ken, JP;
Abstract
Upward variations of a molten metal level in a container for melting metallic material shall be carried out by detecting variations of a liquid level inside a detector connected to a gas-pipeline, wherein a rise in the pipeline pressure causes the liquid level to move down. Communication is established by means of a gas-pipeline for inert gas between that portion of a container for melting metallic material which is above a molten metal surface and that portion of a detector comprising a transparent tubular container which is above a liquid surface . Variations of the liquid level inside the detector due to a rise in the pressure inside the above-mentioned gas-pipeline are detected as upward variations of the level of the molten metal surface.