Patents by Inventor Stephen M. Ruffing

Stephen M. Ruffing 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).

  • ELECTRIC MOTOR HAVING FLUID CIRCULATION SYSTEM AND METHODS FOR COOLING AN ELECTRIC MOTOR
    Publication number: 20120256504
    Abstract: An electric motor having a housing, a stator mounted in the housing, and a rotor mounted in the housing for rotation relative to the stator about a central axis. A plurality of fluid flow passages extend through the rotor between opposite ends. An electro-magnetic drive system is adapted for driving rotation of the rotor relative to the stator. A fluid circulation system is in fluid communication with the fluid flow passages for providing fluid flow from the first end of the rotor to the second end of the rotor through at least one of the fluid flow passages and fluid flow from the second end of the rotor to the first end of the rotor through at least one other of the fluid flow passages.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 11, 2012
    Applicant: NIDEC MOTOR CORPORATION
    Inventors: Stephen M. Ruffing, Ronald W. Schmidt, Kenneth R. Friedman
  • Electric motor having fluid circulation system and methods for cooling an electric motor
    Patent number: 8159094
    Abstract: An electric motor having a housing, a stator mounted in the housing, and a rotor mounted in the housing for rotation relative to the stator about a central axis. A plurality of fluid flow passages extend through the rotor between opposite ends. An electro-magnetic drive system is adapted for driving rotation of the rotor relative to the stator. A fluid circulation system is in fluid communication with the fluid flow passages for providing fluid flow from the first end of the rotor to the second end of the rotor through at least one of the fluid flow passages and fluid flow from the second end of the rotor to the first end of the rotor through at least one other of the fluid flow passages. The rotor and components of the fluid circulation can be assembled to make a rotor assembly.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: April 17, 2012
    Assignee: Nidec Motor Corporation
    Inventors: Stephen M. Ruffing, Ronald W. Schmidt, Kenneth R. Friedman
  • ELECTRIC MOTOR HAVING FLUID CIRCULATION SYSTEM AND METHODS FOR COOLING AN ELECTRIC MOTOR
    Publication number: 20100231067
    Abstract: An electric motor having a housing, a stator mounted in the housing, and a rotor mounted in the housing for rotation relative to the stator about a central axis. The rotor has opposite ends and a plurality of fluid flow passages extending through the rotor between the ends. An electro-magnetic drive system is operatively connected to the rotor for driving rotation of the rotor relative to the stator. A fluid circulation system is in fluid communication with the fluid flow passages for providing fluid flow from the first end of the rotor to the second end of the rotor through at least one of the fluid flow passages and fluid flow from the second end of the rotor to the first end of the rotor through at least one other of the fluid flow passages. The rotor and components of the fluid circulation can be assembled to make a rotor assembly.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 16, 2010
    Inventors: Stephen M. Ruffing, Ronald W. Schmidt, Kenneth R. Friedman