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:
Nov. 06, 1990
Filed:
Jan. 05, 1990
Hitoshi Yamada, Tokyo, JP;
Ryo Takahashi, Tokyo, JP;
Yokogawa Medical Systems, Limited, Tokyo, JP;
Abstract
A CAT (computerized axial tomography) scanner having a lightweight rotary portion. The scanner has slip rings through which electric power is supplied to an x-ray tube. The slip rings do not need any special insulating mechanism. The scanner includes an inverter (3) for converting a line voltage into an AC voltage between the line voltage and a high voltage applied to the x-ray tube. The frequency of the AC voltage is between the frequency of the line voltage and radio frequencies. This AC voltage is supplied via the slip rings to the rotary portion and then stepped up and rectified by step-up tanks (7, 8) on the rotary portion to obtain the high DC voltage applied to the x-ray tube.