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:
Feb. 05, 1980
Filed:
Aug. 31, 1978
Masayuki Takamura, Hamamatsu, JP;
Norio Shinoda, Hamamatsu, JP;
Kazuo Kurahashi, Hamamatsu, JP;
Masataka Hatae, Hamamatsu, JP;
Abstract
An improved billet and process for producing a tubular body by forced plastic deformation is disclosed. The billet includes a metallic tubular sheath, a metallic center core and a salt intermediate core. The radial thickness of the metallic tubular sheath is equal to or less than 0.11 times the outer diameter of the metallic tubular sheath. The metallic center core is positioned within the tubular sheath and is surrounded by the salt intermediate core which fills the cylindrical space between the tubular sheath and the center core. In the process of the present invention, the foregoing billet is subjected to forced compulsory deformation to reduce the diameter of the billet. Thereafter, the intermediate core is removed through solution and the center core is drawn out of the sheath in order to obtain the tubular body.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile