Patents by Inventor Don R. Drawbaugh

Don R. Drawbaugh 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).

  • Gas stopper and methods of constructing and utilizing same
    Patent number: 5123557
    Abstract: A gas cap permanently mounted to an access door for preventing back flow of fuel from a filler neck. A tubular member is secured to the access door including a mating member for connecting with the filler neck and locking members. Upon the presence of pressure caused by a fuel backflow, the locking members are engaged to the filler neck preventing the gas cap from being removed. Thus, release of fuel in vehicle accidents, such as rollovers, is prevented.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: June 23, 1992
    Inventor: Don R. Drawbaugh