Patents by Inventor David R. Smit

David R. Smit 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).

  • Aircraft emergency power unit with battery powered subsystem
    Patent number: 12116141
    Abstract: An aircraft emergency power unit (EPU) includes a battery powered subsystem that replaces toxic hydrazine fuel use. The battery of the battery powered subsystem is utilized to supply power to an aircraft electrical system in the event of a failure of the EPU turbine-powered generator. The battery of the battery powered subsystem is also utilized to supply power to an electric hydraulic motor pump in the event of a failure of the EPU turbine-powered hydraulic pump (or to augment the output of the EPU-turbine-powered hydraulic pump). The battery of the battery powered subsystem is capable of simultaneously powering the electrical system and the electric hydraulic motor pump or of powering either one of the electrical system and electric hydraulic motor pump independently based upon aircraft fault conditions. Intermittent operation of the electrical system and/or the electric hydraulic motor pump in an intermittent fashion on an as-needed basis is also possible.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: October 15, 2024
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Jeffrey A. Baker, Mario F. Cruz, David R. Smit, Derek Paul Dougherty
  • AIRCRAFT EMERGENCY POWER UNIT WITH BATTERY POWERED SUBSYSTEM
    Publication number: 20220185496
    Abstract: An aircraft emergency power unit (EPU) includes a battery powered subsystem that replaces toxic hydrazine fuel use. The battery of the battery powered subsystem is utilized to supply power to an aircraft electrical system in the event of a failure of the EPU turbine-powered generator. The battery of the battery powered subsystem is also utilized to supply power to an electric hydraulic motor pump in the event of a failure of the EPU turbine-powered hydraulic pump (or to augment the output of the EPU-turbine-powered hydraulic pump). The battery of the battery powered subsystem is capable of simultaneously powering the electrical system and the electric hydraulic motor pump or of powering either one of the electrical system and electric hydraulic motor pump independently based upon aircraft fault conditions. Intermittent operation of the electrical system and/or the electric hydraulic motor pump in an intermittent fashion on an as-needed basis is also possible.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 16, 2022
    Inventors: Jeffrey A. Baker, Mario F. Cruz, David R. Smit, Derek Paul Dougherty
  • Actuator with backup component failure detection
    Patent number: 11300185
    Abstract: An actuator includes a ball screw, a rod provided at least partially within the ball screw, a ball nut, a ball nut restraint, a first biasing member disposed at least partially between a proximate end of the rod and a proximate end of the ball screw, and a second biasing member disposed at least partially between a distal end of the ball nut and an inner surface of the ball nut restraint.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: April 12, 2022
    Assignee: Eaton Intelligent Power Limited
    Inventors: Sorin Gavriliuc, Joshua M. Byron, David R. Smit, Paolo J. Messina
  • ACTUATOR WITH BACKUP COMPONENT FAILURE DETECTION
    Publication number: 20190063567
    Abstract: An actuator includes a ball screw, a rod provided at least partially within the ball screw, a ball nut, a ball nut restraint, a first biasing member disposed at least partially between a proximate end of the rod and a proximate end of the ball screw, and a second biasing member disposed at least partially between a distal end of the ball nut and an inner surface of the ball nut restraint.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 28, 2019
    Inventors: Sorin Gavriliuc, Joshua M. Byron, David R. Smit, Paolo J. Messina