Patents by Inventor Charles A. Collings, Jr.

Charles A. Collings, Jr. 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 assembly
    Patent number: 4210338
    Abstract: A piston ring assembly for placement between a piston and a cylinder wall is provided. The assembly includes an annular expansion ring disposed around the piston, and an annular parted piston ring disposed around the expansion ring. A predetermined segment of the piston ring engages the expansion ring.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: July 1, 1980
    Assignee: Cummins Engine Company, Inc.
    Inventor: Charles A. Collings, Jr.