Patents by Inventor Blake D. Redfield

Blake D. Redfield 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: 10390400
    Abstract: A soft start circuit device couples at the junction between a 0-10 volt DC dimmer and an LED driver. A first wire couples with the positive polarity dimmer output, and a second wire couples with the negative polarity dimmer output. A capsule provides electrical insulation and physical consolidation and isolation to the capsule interior, and the first and second wires each pass through the capsule wall into the capsule interior. A capacitor and resistor are retained in the capsule interior and are each electrically coupled in parallel across the first and second wires. A sealant fills the capsule interior. At least one indicium is affixed with each wire, to indicate proper polarity connection with the 0-10 volt DC dimmer output. The capsule may further comprise a generally cylindrical and light transmissive polycarbonate packaging tube, and first and second end caps. The sealant may also comprise a light transmissive silicone sealant.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: August 20, 2019
    Assignee: Heartland, Inc.
    Inventor: Blake D. Redfield
  • Patent number: 9830811
    Abstract: A readily replaceable accessible pedestrian signal station is described including a bottom base plate and a sacrificial base plate.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: November 28, 2017
    Assignee: Tip Indications LLC
    Inventors: Doug Bischoff, Blake D. Redfield
  • Patent number: 9788391
    Abstract: A solid state lighting panel sequentially energizes a plurality of LED lighting banks at the zero crossing points of the sinusoidal input line voltage. Each LED lighting bank is provided with a soft start circuit to ramp up the luminous intensity gradually. The energizing of one LED lighting bank at a time at zero cross, in combination with soft start ramp, keeps inrush spikes below the ultimate steady state operating current level. The lighting panel is further provided with line-in and line-out surge protection, along with a specific arrangement of terminals within a terminal block, the provision of surge protectors therein, the use of optically isolated solid state relays, and a plurality of well-placed circuit breakers to provide enhanced surge tolerance.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: October 10, 2017
    Assignee: Heartland, Inc.
    Inventor: Blake D. Redfield
  • Publication number: 20140340244
    Abstract: A readily replaceable accessible pedestrian signal station is described including a bottom base plate and a sacrificial base plate.
    Type: Application
    Filed: April 30, 2014
    Publication date: November 20, 2014
    Inventors: Doug Bischoff, Blake D. Redfield