Patents by Inventor John P. MCDONNEL

John P. MCDONNEL 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).

  • Pump with wear-resistant barrel and plunger having coating support
    Patent number: 10393111
    Abstract: A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: August 27, 2019
    Assignee: Caterpillar Inc.
    Inventors: Alan Ray Stockner, Aaron M. Brown, Sridhar Thangaswamy, Glenn B. Cox, John Jay Truhan, Jr., Michael J. Pollard, John P. McDonnel
  • PUMP WITH WEAR-RESISTANT BARREL AND PLUNGER HAVING COATING SUPPORT
    Publication number: 20170096998
    Abstract: A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.
    Type: Application
    Filed: December 15, 2016
    Publication date: April 6, 2017
    Applicant: Caterpillar Inc.
    Inventors: Alan Ray STOCKNER, Aaron M. BROWN, Sridhar THANGASWAMY, Glenn B. COX, John Jay TRUHAN, JR., Michael J. POLLARD, John P. MCDONNEL