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:
Mar. 10, 1981
Filed:
May. 30, 1979
Yoshimasa Kidowaki, Osaka, JP;
Shiro Okamoto, Shigaken, JP;
Iwatani Sangyo Kabushiki Kaisha, Osaka, JP;
Abstract
A casting furnace includes upper and lower chambers, separated by a wall having a pouring path extending therethrough. A crucible is positioned in the upper chamber and a mold is positioned in the lower chamber, both in alignment with the pouring path. A body of casting metal is placed in the crucible and is melted from the top down by an electric arc generated in the upper chamber, the bottom portion of the body of casting metal blocking the pouring path until the casting metal has become molten. Thereafter, the molten casting metal falls by gravity through the pouring path, and into the mold. The arrangement is such that the molten metal requires nothing but the force of gravity to enter the mold cavity.