Patents by Inventor Donald J. Altobe

Donald J. Altobe 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).

  • Piston ring employing elastomeric sealing member within the ring groove
    Patent number: 5474307
    Abstract: A piston head assembly has one, two or more grooves to receive piston rings. One or more of the grooves may receive multiple piston rings. A circumferential groove from the bottom of the elastomeric material allows oil pressure to aid in sealing. A novel piston ring employs a circumferential channel facing outwardly with a shorter bottom channel facing outwardly with a shorter bottom channel sidewall. The elastomeric material extends to form a circumferential extension cooperative with a subgroove of the piston ring groove.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: December 12, 1995
    Assignee: Richard DeBiasse
    Inventors: Richard DeBiasse, Donald J. Altobe