Patents by Inventor Robert C. Lohman

Robert C. Lohman 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).

  • Sliding cover assembly for open body trucks
    Patent number: 4210361
    Abstract: A sliding cover assembly for open body trucks consisting of a pair of elongated guides adapted to be mounted on either side of the truck body forming a slide guide for a sheet of corrugated material extending between the slide guides and extending over the open body with a spring operated return drum mounted at the front end of the truck upon which the corrugated cover is wound when access to the truck body is desired. At the rear end of the corrugated cover there is a latch which secures the cover in its covered position.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: July 1, 1980
    Inventors: Herbert Z. Marvin, Edmond L. Lohman, Robert C. Lohman
  • Apparatus for inspecting a pipeline for leaks
    Patent number: 4172379
    Abstract: A method and apparatus for automatically adjusting the gain of an ultrasonic device for inspecting a pipeline for leaks. The ultrasonic device is designed to pass through the interior of a pipeline and record noise produced by fluids leaking from the pipeline. The response of the device is adjusted automatically by controlling the gain of the amplification in response to the strength of a signal received from an ultrasonic generator positioned outside the pipeline.
    Type: Grant
    Filed: March 3, 1978
    Date of Patent: October 30, 1979
    Assignee: Shell Oil Company
    Inventors: Alfred VAN Tilburg, Robert C. Lohman