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:
Jul. 23, 1985
Filed:
Sep. 23, 1982
Applicant:
Inventors:
Yoshio Fukuhara, Yokohama, JP;
Hideo Koizumi, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
378144 ; 378125 ;
Abstract
The invention provides a rotary anode which has a graphite body having a plurality of radial slits and a target layer adhered to the upper surface of the graphite body. The target layer is a single layer of tungsten or a tungsten alloy, or a composite layer consisting of the single layer and a molybdenum layer. In the manufacturing process and in use of the rotary anode, a thermal stress which occurs in the graphite body is decreased, thus preventing cracking of the graphite body. The invention also provides a method for manufacturing the rotary anode.