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:
Jan. 06, 1998
Filed:
Feb. 10, 1995
Kabushiki Kaisha Sankyo Seiki Seisakusho, Nagano, JP;
Abstract
A motor having rotor has a good balance of inertia and a magnetic characteristic that match the specifications of the motor with which those rotors are to be used. A rare-earth containing iron-base resin-bonded magnet is molded from an iron-base magnetic powder containing a rare earth metal such as neodymium and praseodymium in powder, a thermoplastic or thermosetting resin and additive. A density and magnetic characteristic is proportionally changed by adjusting a mixing ratio of a filler powder. Specifically, when a mixing ratio of filler powder containing tungsten having a density 19.1 g/cm.sup.3 is in 13 vol % is injected, or a mixing ratio of alloy powder containing tungsten an nickel, or tungsten and chromium having a density 10.5 g/cm.sup.3 is compression-mold, its magnetic flux assume the same value as those of compression-molded Sm--Co magnets.