Patents by Inventor Don R. Lawrence

Don R. Lawrence has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4896899
    Abstract: A go-cart vehicle, made from high strength, molded engineering plastics, has a steering shaft tilt assembly which includes a steering shaft (66) slidable in a pivot bushing (70) carried by a bracket (73). The shaft pivots at a U-joint (78) and the bracket (73) pivots at its base. The bracket carries a detent--a cylinder (94) attached to the base (74) of the bracket (73). The cylinder (94) has a number of holes (93) to engage a latch pin (92) which is controlled by a release lever (95) operated by a release button (102). The shaft (66) may be adjusted to varying angles of tilt by moving the latch pin from hole to hole which motion causes the bushing, shaft and bracket to pivot in unison as the shaft slides in the bushing. The vehicle combines a change in caster angle (12) to about 12 degrees with a short, rigid chassis (2) and a live axle (45) to make it possible to turn a sharp corner at speeds of 20 mph or less.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: January 30, 1990
    Assignee: Action Products, Inc.
    Inventor: Don R. Lawrence