Patents by Inventor John Andrew Bleecker, III

John Andrew Bleecker, III 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).

  • Filter apparatus and method for brushless DC motors
    Patent number: 8796973
    Abstract: In a multi-phase brushless DC motor, a zero crossing N-bit filter includes a comparator and a phase multiplexer. The phase multiplexer connects each motor phase to each of a positive and a negative input of the comparator, with a switch in each connection to form a switch array. A microprocessor is disposed to operate the switches, and is configured to measure a BEMF for a first phase by opening the switches connecting all other phases to the positive input of the comparator and by opening the switch connecting the first phase being measured to the negative input of said comparator. The comparators output is received by a shift register. The microprocessor is configured to respond to a zero crossing when a majority of bits in the shift register change between high and low.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: August 5, 2014
    Assignee: Hella Corporate Center USA, Inc.
    Inventors: Scott Eugene Bauer, John Andrew Bleecker, III
  • FILTER APPARATUS AND METHOD FOR BRUSHLESS DC MOTORS
    Publication number: 20130249459
    Abstract: In a multi-phase brushless DC motor, a zero crossing N-bit filter includes a comparator and a phase multiplexer. The phase multiplexer connects each motor phase to each of a positive and a negative input of the comparator, with a switch in each connection to form a switch array. A microprocessor is disposed to operate the switches, and is configured to measure a BEMF for a first phase by opening the switches connecting all other phases to the positive input of the comparator and by opening the switch connecting the first phase being measured to the negative input of said comparator. The comparators output is received by a shift register. The microprocessor is configured to respond to a zero crossing when a majority of bits in the shift register change between high and low.
    Type: Application
    Filed: March 26, 2012
    Publication date: September 26, 2013
    Applicant: HELLA KG HUECK & CO.
    Inventors: Scott Eugene Bauer, John Andrew Bleecker, III