Patents by Inventor Stephen J. Crain

Stephen J. Crain 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).

  • Battery key, starter and improved crank
    Patent number: 11661915
    Abstract: A system for starting an engine of a vehicle has a fuel injector injecting fuel into a closed intake port to form an air fuel mixture. The system also includes an actuator rotating a crankshaft in a first direction to open the intake port by moving a piston within a cylinder coupled to the crankshaft. A combustion chamber defines between the cylinder and the port receiving the air fuel mixture through the intake port. The actuator rotates the crankshaft in a second direction to close the intake port. A spark plug ignites the air fuel mixture to start the engine. The engine also includes many other disclosed features.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: May 30, 2023
    Assignee: Polaris Industries Inc.
    Inventors: Stephen J. Crain, Trevor F. Rhodes
  • Battery Key, Starter And Improved Crank
    Publication number: 20200347814
    Abstract: A system for starting an engine of a vehicle has a fuel injector injecting fuel into a closed intake port to form an air fuel mixture. The system also includes an actuator rotating a crankshaft in a first direction to open the intake port by moving a piston within a cylinder coupled to the crankshaft. A combustion chamber defines between the cylinder and the port receiving the air fuel mixture through the intake port. The actuator rotates the crankshaft in a second direction to close the intake port. A spark plug ignites the air fuel mixture to start the engine. The engine also includes many other disclosed features.
    Type: Application
    Filed: July 16, 2020
    Publication date: November 5, 2020
    Inventors: Stephen J. Crain, Trevor F. Rhodes