Patents by Inventor Daniel J. Techtow

Daniel J. Techtow 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).

  • Laser welded fluid filter housing
    Patent number: 5647504
    Abstract: A fluid filter, such as an oil filter for example, has a canister, a top plate and a sealing ring. The sealing ring overlaps portions of the top plate and canister. The sealing ring and canister are joined one to the other by laser welding about the sealing ring adjacent the canister and forming a mechanical lock between the canister and the top plate by mixing of materials.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: July 15, 1997
    Assignee: Caterpillar Inc.
    Inventors: David F. Gullett, Ronald T. Taylor, Daniel J. Techtow