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:
Apr. 26, 1994
Filed:
Mar. 27, 1990
Applicant:
Inventor:
Takashi Ishimaru, Gunma, JP;
Assignee:
Ogura Clutch Co., Ltd., Gunma, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ; H01F / ;
U.S. Cl.
CPC ...
335296 ; 336192 ; 336107 ; 192 / ;
Abstract
In an electromagnetic coupling apparatus, an excitation coil constituted by a plurality of turns of a winding member is covered with a resin coil bobbin. The coil bobbin can be divided into at least two members and is formed into a hollow annular shape. The divided mating surfaces of the members constituting the coil bobbin are joined to each other by ultrasonic welding.