Blade Sharpening Or Conditioning Type Magnets Patents (Class 335/283)
  • Patent number: 7423506
    Abstract: An annular magnet is formed by coupling a plurality of arc-shaped divided magnets with each other in an annular shape as well as such being magnetized with N and S magnetic poles on the end surfaces thereof in an axial direction, wherein the annular magnet is formed such that each of the divided magnets has joint portions at both ends thereof so that the divided magnets are joined to each other. Each of the joint portions also has a joint surface to overlap the joint portions of adjacent divided magnets in the axial direction. The joint surface is magnetized to a magnetic pole different from that of a joint surface to which such is joined, and the divided magnets are coupled with each other by the magnetic attraction force of different magnet poles.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: September 9, 2008
    Assignee: SMC Corporation
    Inventor: Atsushi Terasaki
  • Patent number: 6084494
    Abstract: A mask support device including two communicating elements, a first element having ferromagnetic shunts, and a second element containing permanent magnets, and wherein the elements are rotatable about a central axis and assume fixed positions in the rotation. The mask support device in one position attracts a ferromagnetic metal mask. In a second position, owing to the shunt redirecting the magnetic field, releases the metal mask.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: July 4, 2000
    Assignee: Hewlett-Packard Company
    Inventors: Geary L. Chew, Matthew K. Schwiebert, Ayn R. Lavagnino, Andy H. Uchida