Patents by Inventor David Dunston

David Dunston 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: 11973374
    Abstract: A brushless direct-current motor is provided includes an inner stator and an outer rotor. The rotor includes a rotor core disposed around the stator, an inner annular member mounted on a rotor shaft, and a plurality of radial blades extending angularly from the rotor core to the inner annular member forming a fan. A first end cap is provided including a radial back plate proximate the fan and a center opening in the radial back plate through which the rotor shaft extends. A second end cap is provided including a main body disposed adjacent the stator opposite the fan. The radial back plate of the first end cap includes at least one sloped surface forming at least one air gap such that the airflow generated by the fan is centrifugally guided within the first end cap by the sloped surface and caused to exit through the air gap.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: April 30, 2024
    Assignee: Black & Decker Inc.
    Inventors: John B. Fogle, Dustin Jeffries, Michael R. Marjomaa, Kevin L. Pulley, Vincent W. Zou, Jarrett A. Dunston, David J. Smith, Rene Thieme, Tim Heimrich, Tobias Heep, Daniel Bernhart, Dieter Schmidtfrerick
  • Patent number: 11951603
    Abstract: A power tool is provided including a tool housing including a motor housing and a handle portion extending longitudinally from the motor housing; a battery receptacle disposed at an end of the handle portion opposite the motor housing, the battery receptacle being configured to receive a battery pack; and a brushless DC (BLDC) motor including an electronically-commutated stator assembly and a rotor assembly configured to rotate with respect to the stator assembly, the stator assembly comprising a stator lamination stack sized to be received within the motor housing having a circumference of approximately 140 to approximately 190 mm. The motor produces a maximum power output of at least 1600 watts for driving an output shaft at a maximum torque of at least 30 inch-pounds and a maximum speed of at least 8000 rotations-per-minute.
    Type: Grant
    Filed: May 9, 2023
    Date of Patent: April 9, 2024
    Assignee: Black & Decker Inc.
    Inventors: Joseph P. Kelleher, William F. Gallagher, Craig A. Oktavec, David J. Smith, Jarrett A. Dunston
  • Patent number: 5127479
    Abstract: A fire extinguishing system for a residential cookstove or range includes a fire extinguisher mounted above a hood in a cabinet positioned over the cookstove or range. The fire extinguisher is connected by flexible hoses and/or adjustable pipes to a pair of nozzles within the hood to dispense fire suppressant over the cookstove or range. The fire extinguisher includes an operator normally biased to the operable position, but held in the inoperable position by a cable system having a plurality of fusible or reusable, heat-activated links distributed therein. The cable system is held in tension adjacent the inner periphery of the hood and includes a section of chain to facilitate installation. Upon the occurrence of a fire, at least one of the links separates, releasing the cable system and allowing the operator to move to the operating position whereby the fire extinguisher releases the fire suppressant.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: July 7, 1992
    Assignee: 21st Century International Fire Equipment Services Corporation
    Inventors: Henry J. Stehling, Grady North, Paul Rouse, David Dunston