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. 06, 2025
Filed:
Jul. 02, 2020
Foster Electric Company, Limited, Tokyo, JP;
Ken Yamakami, Tokyo, JP;
FOSTER ELECTRIC COMPANY, LIMITED, Tokyo, JP;
Abstract
An oscillatory actuatorincludes: an in-case electromagnetic driver; a mover; and a pair of leaf springsandfor supporting the mover. The moverincludes a magnet, pole piecesandpaired, and massesandpaired. The in-case electromagnetic driverincludes coilsandpaired and a tubular yokeradially outside the coilsand, the yoke being made of a soft magnetic material and projecting outward beyond the coilsandalong the oscillation axis O. Along the oscillation axis O, an average length Ly of the yoke O is equal to or longer than the sum of an end-to-end length Lp of the pole piecesandpaired and the double of a one-way amplitude La of an oscillation of the mover, i.e., Ly≥the sum (Lp+2La).