Patents by Inventor Paul David Smallidge

Paul David Smallidge 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).

  • Valve seat insert for engine head having venturi flow crowns and seating surface profiled for limiting valve recession
    Patent number: 11060425
    Abstract: A valve seat insert for a gas exchange valve such as an intake valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming wear crowns to contact the gas exchange valve at different wear states. The valve seat insert is further structured by way of the inner peripheral surface with an incoming flow crown, and a venturi extending from the incoming flow crown toward a throat of the valve seat insert. The venturi accelerates incoming gas flow.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: July 13, 2021
    Assignee: Caterpillar Inc.
    Inventors: Ashwin A. Hattiangadi, Srikanth Reddy Boddapati, Dongyao Wang, Uijal Paladhi, Paul David Smallidge, John Robert Brubaker, Abe Ingold
  • VALVE SEAT INSERT FOR ENGINE HEAD HAVING VENTURI FLOW CROWNS AND SEATING SURFACE PROFILED FOR LIMITING VALVE RECESSION
    Publication number: 20200291827
    Abstract: A valve seat insert for a gas exchange valve such as an intake valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming wear crowns to contact the gas exchange valve at different wear states. The valve seat insert is further structured by way of the inner peripheral surface with an incoming flow crown, and a venturi extending from the incoming flow crown toward a throat of the valve seat insert. The venturi accelerates incoming gas flow.
    Type: Application
    Filed: March 13, 2019
    Publication date: September 17, 2020
    Applicant: Caterpillar Inc.
    Inventors: Ashwin A. Hattiangadi, Srikanth Reddy Boddapati, Dongyao Wang, Uijal Paladhi, Paul David Smallidge, John Robert Brubaker, Abe Ingold
  • Valve seat insert for long life natural gas lean burn engines
    Patent number: 10767520
    Abstract: A valve seat insert of an engine has a valve seating surface including an outer curved segment forming a first wear crown for contacting the valve at an early wear state, an inner curved segment forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the outer and the inner curved segments. A top flow crown is set off radially inward from the engine head, and a sloping segment extending from the top flow crown is oriented at an acute angle relative to the valve seat center axis.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: September 8, 2020
    Assignee: Caterpillar Inc.
    Inventors: Ashwin A. Hattiangadi, Paul David Smallidge, Rong Qu