Patents by Inventor by Laird C. Cleaver, personal representative

by Laird C. Cleaver, personal representative 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).

  • Apparatus for cleaning heat exchanger tubes
    Patent number: 4124065
    Abstract: In a cleaning system for heat exchanger tubes each tube has a chamber at its end for capturing a tube cleaning element such as a brush that is subject to being propelled in opposite directions through the tube by reversing the direction of fluid flow therein. Novel means are provided for enabling access to the tube through the chamber for such purposes as replacing brushes and admitting a flaw detector to the tube.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: November 7, 1978
    Assignee: Water Services of America, Inc.
    Inventors: Gordon F. Leitner, Fred G. Wiegratz, John C. Cleaver, deceased, by Laird C. Cleaver, personal representative, Lee Wolcott, Vice President, First Wisconsin Trust Company, personal representative