Patents Examined by Daniel G. Sharley
  • Jack with urethane brake
    Patent number: 6527251
    Abstract: A scissor jack assembly with double-lead Acme threaded screw. Through use of urethane or similar material as a braking means, the jack assembly is operable with a self locking action over a wider range of loads and especially at lower loads where an Acme loading phenomenon that results in said self locking action has previously been unattainable. Faster and smoother jack operation is made possible by employing a thrust bearing, including a plurality of roller or ball bearings, with the jack assembly.
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: March 4, 2003
    Assignee: Norco Industries, Inc.
    Inventor: Bernie L. Garceau