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:
Mar. 29, 1994
Filed:
Nov. 20, 1992
Takanobu Lee, Matsudo, JP;
Ikuo Matsushita, Matsudo, JP;
Masao Take, Matsudo, JP;
Masahiro Mifune, Matsudo, JP;
Mabuchi Motor Co., Ltd., Chiba, JP;
Abstract
A rotor for rotary electrical machinery comprising a permanent-magnet member made of a mixture having ferromagnetic material powder and a binder resin for chief ingredients, and a shaft, in which a recess whose projected contour on a plane orthogonally intersecting the axial line of the permanent-magnet member is of a non-circular shape is provided at least an end face of the permanent-magnet member, and a shaft is press-fit into a metallic bush fitted to the recess, thereby ensuring high coaxiality tolerance between the permanent-magnet member and the shaft, easy assembly and low manufacturing cost.