Patents Assigned to Tetsudo Kizai Kogyo Company Limited
  • Patent number: 4505428
    Abstract: A rail fastening device comprises a curved tapered spring having free ends adapted to engage a rail flange for preventing lateral and tilting motion of the rail. The spring is secured by a fastening element having a detent which is rotated and slid into a shaped hole in an anchor embedded in the tie on which the rail is supported.
    Type: Grant
    Filed: August 18, 1982
    Date of Patent: March 19, 1985
    Assignee: Tetsudo Kizai Kogyo Company Limited
    Inventors: Yoshio Matsuo, Kentaro Matsubara
  • Patent number: 4447006
    Abstract: A cam actuated elastic rail securing device comprises a spring member which is adapted to engage the flange of a rail and to cooperate with a rotary cam element to apply an elastic restraining force to the rail when the cam is rotated relative to an anchor and slid axially to lock the cam against reverse rotation.
    Type: Grant
    Filed: March 10, 1982
    Date of Patent: May 8, 1984
    Assignee: Tetsudo Kizai Kogyo Company Limited
    Inventor: Yoshio Matsuo
  • Patent number: 4312478
    Abstract: An elastic rail fastening device for securing a rail to a concrete tie having a spike secured therein. A top pressing spring engages the top surface of the rail flange for holding the rail against the tie. One end of the spring is supported beneath a shoulder on the metal spike. A spring receiver is fitted to the tie, and the other end of the top spring bears thereagainst. A side spring is inserted between the side of the rail flange and the spring receiver to receive transverse pressure working on the rail.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: January 26, 1982
    Assignee: Tetsudo Kizai Kogyo Company Limited
    Inventors: Yoshio Matsuo, Kentaro Matsubara
  • Patent number: 4310120
    Abstract: An elastic rail fastening device which uses a metal spike having a projecting jaw, the lower part of the spike being buried in a concrete support. A deformed S-shaped plate spring is provided with one end contacting the upper surface of a spring receiver, a first bent-down portion urged downwardly for depressing the upper surface of the rail flange as laid on the concrete support, a middle portion having the upper surface contacting the projecting jaw, a second bent-down portion for contacting the side of the spring receiver, and the other end contacting the side of the rail flange. The spring receiver is interposed between a guide on the concrete support and the second bent-down portion, whereby the spring receiver pushes up the one end of the spring.
    Type: Grant
    Filed: February 27, 1980
    Date of Patent: January 12, 1982
    Assignee: Tetsudo Kizai Kogyo Company Limited
    Inventors: Yoshio Matsuo, Kentaro Matsubara
  • Patent number: 4143818
    Abstract: A rail fastening apparatus for cooperation with a rail which is supported on and extends transversely across a tie. The apparatus comprising a steel support positioned adjacent one side of the rail and having a leg portion which is buried in the tie and an upper portion which projects upwardly above the tie. A lever is pivotally supported on the upper portion for swinging movement about an axis which extends substantially parallel with the longitudinally extending direction of the rail. The lever has a cam associated therewith. A spring-receiver structure is mounted on the tie and positioned on the opposite side of the axis from the rail, and an elongated plate-like spring extends between the spring-receiver structure and the rail. The spring has one end supported on the spring-receiver structure and the other end supported on a flange of the rail.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: March 13, 1979
    Assignee: Tetsudo Kizai Kogyo Company Limited
    Inventors: Kentaro Matsubara, Yoshio Matsuo