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:
May. 02, 1995
Filed:
Dec. 21, 1993
Applicant:
Inventors:
Toshio Ohji, Mito, JP;
Yuji Kanda, Tottori, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
336120 ; 336200 ; 336232 ;
Abstract
A composite coil member for use in a rotary transformer is disclosed which is easily assembled and easily fitted in a transformer core of the rotary transformer. A plurality of coaxial conductive coils 4 are formed photolithographically on a plurality of coaxial portions of a flexible insulating member prepared by photolithography and the respective coaxial portions of the flexible insulating member are supported at at least three points on each coaxial portion by radially extending connecting portions 8 of the flexible insulating member.