Patents by Inventor Lee M. Flasche

Lee M. Flasche 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 back-purging during welding of pipe
    Patent number: 4916281
    Abstract: Disclosed is an improvement in the process of gas back-purging the root section of the weld during open-butt welding of pipe. The rates of gas flow in back-purging and in torch shielding are controlled and a ratio between the flow rates is established. The invention teaches a gas back-purging flow rate of about 40 CFH and a torch shielding flow rate of about 10 CFH under typical conditions to maintain a required 4 to 1 ratio of the flow rates.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: April 10, 1990
    Assignee: Haynes International, Inc.
    Inventors: Lee M. Flasche, Gregory L. Hoback, James L. Meyers