Patents by Inventor David S. Dunn

David S. Dunn 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).

  • Publication number: 20210066721
    Abstract: By mixing Poly (3-hexylthiophene-2,5-diyl) (P3HT) with carbon nanotubes (CNT), the resultant mixture of P3HT-CNT serves as a surface coating for the cathode material LiNi0.8Co0.15Al0.05O2 (NCA) and offers a number of advantageous properties when used as a conductive binder for lithium-ion battery cathode materials.
    Type: Application
    Filed: September 11, 2020
    Publication date: March 4, 2021
    Inventors: Bruce S. Dunn, Sarah H. Tolbert, Chun-Han Lai, David S. Ashby, Terri C. Lin, Jonathan Lau, Andrew Dawson
  • Patent number: 10905903
    Abstract: Various embodiments of a respirator (10) that includes a harness (13, 16), a mask body (12), and an exhalation valve (14) are disclosed. The exhalation valve (14) can include a valve seat (20) and a flexible flap (22) that is in engagement with the valve seat. The flexible flap can have one or more materials that can cause the flap to flash (26) when moving from a closed position to an open position or vice versa. The flashing valve can make it easier for a user to ascertain whether the valve is operating properly.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: February 2, 2021
    Inventors: Philip G. Martin, Caroline M. Ylitalo, Gina M. Buccellato, James M. Jonza, William Ward Merrill, Douglas S. Dunn, David T. Yust
  • Patent number: 10370748
    Abstract: An austenitic stainless steel having low nickel and molybdenum and exhibiting comparable corrosion resistance and formability properties to higher nickel and molybdenum alloys comprises, in weight %, up to 0.20 C, 2.0-9.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 1.0-5.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities, the steel having a ferrite number of less than 10 and a MD30 value of less than 20° C.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: August 6, 2019
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Patent number: 10323308
    Abstract: An austenitic stainless steel composition having low nickel and molybdenum and exhibiting high corrosion resistance and good formability. The austenitic stainless steel includes, in weight %, up to 0.20 C, 2.0-6.0 Mn, up to 2.0 Si, 16.0-23.0 Cr, 5.0-7.0 Ni, up to 3.0 Mo, up to 3.0 Cu, 0.1-0.35 N, up to 4.0 W, up to 0.01 B, up to 1.0 Co, iron and impurities. The austenitic stainless steel has a ferrite number less than 11 and an MD30 value less than ?10° C.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 18, 2019
    Inventors: David S. Bergstrom, James M. Rakowski, Charles P. Stinner, John J. Dunn, John F. Grubb
  • Publication number: 20110296630
    Abstract: An appliance lid for an appliance is disclosed. The appliance lid includes a viewing window; and at least one clamshell providing partial encapsulation of the viewing window using at least two parts surrounding the viewing window. The viewing window allows operation of the appliance to be observed. In one embodiment, the clamshell includes a top piece and a bottom piece encapsulating the viewing window. The appliance may be, for example, a top loading washing machine. The top and bottom pieces can be fastened to one another, for example, using an adhesive or one or more mechanical fasteners. One or more gaskets can optionally be provided along at least one edge of the viewing window. A magnet can optionally be embedded in the clamshell to provide a safety lock for the appliance.
    Type: Application
    Filed: June 8, 2010
    Publication date: December 8, 2011
    Inventors: Daniel S. Frazer, Todd P. Boutiette, David S. Dunn, Stephen E. Hettinger, Matthew Parsons, James Q. Pollett
  • Patent number: 5553521
    Abstract: A device for adjusting the spring tension in a door closer in situ comprises body having a front side and back side surface. Mounting screw openings are disposed within the body and are positioned at locations corresponding to locations of selected locking screws in the closer used to secure a spring cover. Mounting screws are disposed within respective mounting screw openings. A centrally positioned cavity is disposed within the body and accommodates rotatable placement of an adjustment shaft therein. The adjustment shaft comprises a hexagonal head extending outwardly from the front side surface, and is attached to an adjustment assembly comprising a drive disk extending outwardly from the back side surface of the device. Adjustment pins extend outwardly from the drive disk and are numbered and configured to correspond to adjustment holes in the spring cover.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: September 10, 1996
    Inventor: David S. Dunn
  • Patent number: 4263632
    Abstract: A vibration damper for a transducer positioning system of a diskette system employing a stepping motor for driving a moveable transducer carriage that is coupled to the stepping motor drive means. The mass of the carriage and the coupling means form a vibratory system having a natural frequency of oscillation significantly different from the frequency of the pulses applied to the stepping motor so that while the motion of the carriage reflects the total motion of the shaft, the incremental motions of the shaft are not transmitted to the carriage thereby minimizing noise ancillary to the positioning of the carriage.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: April 21, 1981
    Assignee: MFE Corporation
    Inventors: Edward F. Burke, Jr., David S. Dunn
  • Patent number: 4198871
    Abstract: Apparatus for moving a transducer carriage intermittently along a tract relative to a recording medium employs belting arranged in a closed loop that is tensioned by engagement around at least one idler and connected to the carriage. Belt end segments comprising the loop are wrapped in opposite directions around the periphery of a stepping motor-driven capstan and their ends are secured thereto at axially spaced apart locations thereon. The belting and idlers are arranged so that all of the belt segments wrapped around the capstan remain parallel to the carriage track as the capstan rotates so as to advance the carriage a maximum number of increments along its track.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: April 22, 1980
    Assignee: MFE Corporation
    Inventors: David S. Dunn, R. Bruce Gifford, Edward F. Burke, Jr.
  • Patent number: 4197489
    Abstract: A floppy disk drive system employs an inside-out DC motor whose centrally located stator is mounted directly to the chassis. The motor has a tubular rotor that encircles the stator and it is supported co-axially with the stator by the rotary disk drive spindle. A timing and commutation disk is mounted directly on the rotor and, together with speed control and commutation networks, maintains uniform motor speed.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: April 8, 1980
    Assignee: MFE Corporation
    Inventors: David S. Dunn, Fernando M. Vasconselos