Patents Assigned to Tanken Seiko K.K.
  • Silicon carbide sintered body for mechanical seal and mechanical seal using the same
    Patent number: 5080378
    Abstract: A silicon carbide sintered body for a mechanical seal which has independent pores having an average pore diameter of from 10 to 40 .mu.m and a porosity of from 4 to 13 vol %. The mechanical seal includes a stationary sliding ring and a rotary sliding ring, with at least one of the rings being the silicon carbide sintered body. The silicon carbide sintered body is preferably made of .alpha.-silicon carbide powder.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: January 14, 1992
    Assignees: Showa Denko K.K., Tanken Seiko K.K.
    Inventor: Fumio Kagawa