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:
Feb. 03, 1987
Filed:
May. 14, 1985
Osamu Shibuki, Nagoya, JP;
Noboru Matsuyama, Handa, JP;
Yoshiaki Nagasawa, Toyota, JP;
Katsuhiro Kawai, Nagoya, JP;
Shigeru Sakagami, Nagoya, JP;
Toshiaki Onoyama, Nishio, JP;
Toyota Shatai Kabushiki Kaisha, Kariya, JP;
Abstract
A moving coil type linear motor comprises a rail of generally U-shaped cross section, permanent magnets of flat plate-shape and magnetized in the direction of thickness and provided on an inner side of the rails with varied polarities of magnetic poles next to each other. A pair of coils whose length is 1.5 times that of the magnetic pole and has a space of 0.5 times the length of the magnetic pole in the center thereof, are disposed opposingly with the permanent magnets and travel along the permanent magnets within the rail. Brushes are provided with the respective coils, and a feeder pattern arranged on an inner side of the rail, feeds electric power to the coils through the brushes, only when respective active coil parts of the coils are fully in the magnetic flux of the same direction. The linear motor also comprises sensing means for detecting signals regarding the traveling of the coils, and controlling means for controlling the travel of the coils on the ground of the signals from the sensing means.