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. 10, 1991
Filed:
Jun. 28, 1990
Jun Saito, Kadoma, JP;
Yoshikazu Matsumoto, Kadoma, JP;
Yasuo Suzuki, Kadoma, JP;
Yukihiko Okamura, Kadoma, JP;
Hironobu Hori, Kadoma, JP;
Norito Shiraiwa, Kadoma, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A moving-coil linear motor is formed with a stator means forming a guide and having a permanent magnet array having opposite poles alternately at constant intervals in longitudinal direction of the stator means, and a mover means mounted on the stator means for being movable through an electromagnetic force along the stator means, the mover means having three-phase moving coils wound in bipolar system on cores U-shaped in section. Positive and negative voltages are alternately applied through brushes to the moving coils of the mover means, while its U-shaped cores are opposed to the permanent magnet array, disposing the array between both leg portions of the U-shaped cores, with the magnetic efficiency of the motor thereby remarkably improved while sufficiently effectively minimizing the size.