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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.:

US 5939804 B1

PDFFull Text
Date of Patent:
Aug. 17, 1999

Filed:

Feb. 09, 1998

Linear actuator and optical equipment using the same

Applicant:
Inventors:

Suguru Nakao, Itami, JP;

Tomokazu Tokunaga, Taki-gun, JP;

Yosuke Yamane, Neyagawa, JP;

Norihiko Saka, Neyagawa, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka, JP;

Attorney:

McDermott, Will & Emery

Primary Examiner:

Thomas M Dougherty

Assistant Examiner:

Judson H Jones

Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 12 ;
Abstract

A linear actuator in a simple structure with an excellent S/N characteristic has a movable coil incorporating a pair of magnetic circuits 8a and 8b. The magnetic circuit 8a comprises yokes 6a and 7a, and a magnet 5a of which polarization direction is vertical with regard to a driving direction. The magnetic circuit 8b has the same structure as 8a. As a position detector, a magnetic sensor 10 and a magnetic scale 11 are disposed opposite with each other on a stator side and on a movable element side respetively.

Find Patent Forward Citations

Nakao, Suguru. (1999). Linear actuator and optical equipment using the same (U.S. Patent No. 5939804). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5939804

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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