Patents by Inventor Richard M. Oehlschlaeger

Richard M. Oehlschlaeger 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).

  • Dual wall safety tube
    Patent number: 4653541
    Abstract: A dual wall safety tube assembly comprises an inner, seamless, stainless steel tube of extended length and an outer, welded stainless steel tube of the same length, in which the inner tube is connected as a process line without any junctions except for end couplings and the outer tube is similarly connected as a monitoring or inerting conduit. The assembly may include further options of electric heating cable, plastic jacketing and thermal insulation of fiberglass or similar material.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: March 31, 1987
    Assignee: Parker Hannifin Corporation
    Inventors: Richard M. Oehlschlaeger, John R. Greco