Patents by Inventor David Blake CRENSHAW

David Blake CRENSHAW 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).

  • Emergency lighting driver with programmable output power
    Patent number: 9999108
    Abstract: An emergency lighting driver (100, 200, 400) includes: a power translation circuit (120, 220, 421/423/425) which receives input power from an emergency power source (10) and supplies output power to a load (20); and a programmable control device (140, 240) which controls the power translation circuit in response to a voltage feedback signal and a current feedback signal to cause the output power supplied to the load to have a programmed power output profile (302, 304), wherein the programmed power output profile is a function of time, temperature, the type of energy source employed for the emergency power source, the amount of remaining energy stored in the emergency power source, and/or the occupancy of an area in which the emergency lighting driver is located.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: June 12, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Stefan-Cristian Rezeanu, David Blake Crenshaw, Abhishek Chandrashekhar Sabnis, Shawn Croley, Brian Inman, Tawatos Phadungsoondararak, Madan Venn
  • EMERGENCY LIGHTING DRIVER WITH PROGRAMMABLE OUTPUT POWER
    Publication number: 20170079111
    Abstract: An emergency lighting driver (100, 200, 400) includes: a power translation circuit (120, 220, 421/423/425) which receives input power from an emergency power source (10) and supplies output power to a load (20); and a programmable control device (140, 240) which controls the power translation circuit in response to a voltage feedback signal and a current feedback signal to cause the output power supplied to the load to have a programmed power output profile (302, 304), wherein the programmed power output profile is a function of time, temperature, the type of energy source employed for the emergency power source, the amount of remaining energy stored in the emergency power source, and/or the occupancy of an area in which the emergency lighting driver is located.
    Type: Application
    Filed: April 28, 2015
    Publication date: March 16, 2017
    Inventors: Stefan-Cristian REZEANU, David Blake CRENSHAW, Abhishek Chandrashekhar SABNIS, Shawn CROLEY, Brian INMAN, Tawatos PHADUNGSOONDARARAK, Madan VENN