Patents Assigned to Tanken Seal Seiko Co., Ltd.
  • Movable vacuum forming apparatus for pressing and vacuum press apparatus
    Patent number: 6709259
    Abstract: The object of the invention is to provide a chamber for a heating press which can cope well with the height change of a composite material article. In a chamber for a heating press, upper and lower metal flanges 6, 7 are provided between upper and lower press heating plates 1, 2 and an intrusion part 11 is further formed in the lower metal flange. This intrusion part 11 is intruded into the upper metal flange 6 and the gap between the intrusion part 11 and the upper metal flange 6 is sealed by a packing 22 having a lip.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: March 23, 2004
    Assignee: Tanken Seal Seiko Co., Ltd.
    Inventors: Yuji Yamauchi, Kiyotaka Fujihira, Saburo Seki, Nobutaka Hatori
  • Mechanical seal
    Patent number: 6460858
    Abstract: The compression ring 21 is mounted on the seal ring 20 at the end thereof. The compression ring 21 has the outer circumference projections 30 that are fixed in the groove 40 extending in the axial direction at the inner surface of the flange 22 . With this construction, the compression ring 21 can move in the axial direction and is stopped in the rotational direction. The compression ring 21 is pressed by the springs 23. Thus the compression ring 21 works as a stopper to stop the rotation of the seal ring 20 and as a spring receiver.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: October 8, 2002
    Assignee: Tanken Seal Seiko Co., Ltd.
    Inventors: Munenari Kitajima, Masayuki Toyoshima, Hiroshi Oka
  • Sintered silicon carbide with graphite added thereto, sintered composite containing the same, and mechanical seal
    Patent number: 5998318
    Abstract: There is provided a sintered silicon carbide with graphite added thereto having excellent lubrication characteristics. The sintered silicon carbide with graphite added thereto contains 10-30 wt. % of natural graphite flakes having an average grain size of 8-100 .mu.m and the remainder silicon carbide and a sintering aid, and having a relative density of 80-92%.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: December 7, 1999
    Assignees: Tanken Seal Seiko Co., Ltd., Syowa Denko K.K.
    Inventors: Hiroshi Takanami, Yukio Ishii, Mamoru Asuwa