Patents by Inventor David C. Marcus

David C. Marcus 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).

  • Patent number: 10273823
    Abstract: An inlet door state control system for an auxiliary power unit (APU) includes an inlet door configured to allow air into an inlet of the APU. The system also includes an actuator configured to open the inlet door. The system also includes an APU threshold switch connected to the actuator, the APU threshold switch configured to automatically change from an open position to a closed position when a predetermined APU operating condition is met. In the system, the actuator opens the inlet door when the APU threshold switch is in the closed position.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: April 30, 2019
    Assignee: United Technologies Corporation
    Inventor: David C. Marcus
  • Publication number: 20170335711
    Abstract: An inlet door state control system for an auxiliary power unit (APU) includes an inlet door configured to allow air into an inlet of the APU. The system also includes an actuator configured to open the inlet door. The system also includes an APU threshold switch connected to the actuator, the APU threshold switch configured to automatically change from an open position to a closed position when a predetermined APU operating condition is met. In the system, the actuator opens the inlet door when the APU threshold switch is in the closed position.
    Type: Application
    Filed: May 20, 2016
    Publication date: November 23, 2017
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventor: David C. Marcus
  • Publication number: 20130187791
    Abstract: A device for monitoring a physical system includes an interface in operable communication with the physical system and a control circuit in operable communication with the interface. The device also includes a memory in operable communication with the control circuitry and an electronic paper display in operable communication with the control circuitry. The electronic paper display continuously displays information related to the operation of the physical system.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: David C. Marcus, Charles R. Gilbreth, Eugene L. Peterson