Patents by Inventor Lawrence O. Olsen

Lawrence O. Olsen 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: 4664230
    Abstract: A convenience elevator that encompasses dumbwaiter and residential elevator applications wherein the entire elevator assembly is mounted to a wall of the elevator shaft. The elevator carriage is provided with sliding guides of high strength low friction polymer that slide in channels provided in vertical guide rails. A guide line fixes the relative position of the carriage and counter weight and a separate drive line controlably drives the carriage up and down in the shaft. Safety switches and brakes provide for efficient operation and the entire structure is designed for economical installation and operation.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: May 12, 1987
    Inventor: Lawrence O. Olsen