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:
Dec. 09, 1997
Filed:
Sep. 20, 1995
Applicant:
Inventor:
Seiji Takei, Kanagawa, JP;
Assignee:
Nippon Thompson Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 12 ;
Abstract
A linear direct current motor in which one of the primary and secondary sides is provided with two rows of field magnets that are shifted in phase by 1/8 with respect to each other so that different thrust is obtained from each row of field magnets, but the combined thrust is less variable as compared to a single row of field magnets, and there is less thrust ripple.