Patents Assigned to Twist Inc.
  • Brake cylinder piston spring
    Patent number: 5180149
    Abstract: A coil spring is provided for use in biasing opposing piston portions of a brake cylinder away from each other. The spring includes a body portion formed of a length of alloy wire and including adjacent coils spaced from each other defining a cylindrical helix. A pair of end portions are formed integrally with the body portion and include a plurality of coils positioned in contact with each other and defining a conical helix shape for engaging the opposing piston portions of the brake cylinder.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: January 19, 1993
    Assignee: Twist Inc.
    Inventors: Michael S. Given, Joe W. Wright