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. 11, 1989
Filed:
Jan. 27, 1987
Applicant:
Inventor:
Jacques Fourre, Soisy Sous Montmorency, FR;
Assignee:
Le Carbone Lorraine, Courbevoie, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
378144 ; 378143 ; 428634 ; 428665 ; 428408 ;
Abstract
The present invention concerns a support of carbonaceous material for a rotary target of X-ray tubes. The support is formed of two parts which are fixed with respect to each other, one part being of a carbon/carbon composite which provides mechanical strength and the other part being of polycrystalline graphite for receiving a refractory metal, by virtue of its coefficient of expansion. A thermal contact is provided between the two parts. The invention is especially applicable to targets of X-ray tubes which rotate at a high speed, 20,000 RPM and above.