Patents by Inventor David J. Smith

David J. Smith 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: 11133720
    Abstract: A stator assembly for a brushless DC motor includes a stator core defining poles and having an outer surface, at least one magnet wire wound on the poles forming phases, and a bus bar including a non-conductive mount arranged on the outer surface and conductive terminals. Each conductive terminal includes: a main portion mounted on the non-conductive mount substantially parallel to the longitudinal axis of the motor, a tang portion folded over the main portion from a first longitudinal end of the main portion, and a connection tab at a second longitudinal end of the main portion. At least a contact portion of the at least one magnet wire is wrapped around the tang portion and fused to make an electric connection to the conductive terminal, and the connection tab is arranged to makes electric contact with a wire supplying electric power to the motor.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: September 28, 2021
    Assignee: Black & Decker Inc.
    Inventors: David J. Smith, Justin H. Ayers, David E. Gillespie, Eric E. Hatfield, Earl M. Ortt, Stephen P. Osborne, Brian E. Friedman, Jarrett A. Dunston
  • Patent number: 11128194
    Abstract: An electric motor is provided including: a stator assembly having a lamination stack defining poles and magnet wires wound on the poles, and a rotor rotatably arranged inside the stator assembly. A mount having a curved profile and made of non-conductive material is provided. Conductive terminals are mounted on and secured to a first surface of the mount, the conductive terminals being separated and insulated from each other via portions of the mount. A second surface of the mount opposite the first surface is mounted over to an outer surface of the lamination stack in contact therewith to align the plurality of conductive terminals longitudinally along the outer surface of the lamination stack.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: September 21, 2021
    Assignee: Black & Decker Inc.
    Inventors: David J. Smith, Justin H. Ayers, David E. Gillespie, Eric E. Hatfield, Earl M. Ortt, Stephen Osborne, Brian Friedman, Jarrett A. Dunston
  • Patent number: 11081933
    Abstract: An electric brushless DC motor is provided including an outer rotor assembly having a metallic rotor body, rotor magnets mounted within an inner surface of the rotor body, and a molded structure formed within the rotor body. The molded structure includes at least one of: a main body formed on inner surface of the rotor body to securely cover and retain the rotor magnets on the inner surface of the rotor body, an axial fan formed at an end of the rotor body opposite the rotor magnets, and/or a sense magnet mount formed at approximately a radial center portion of the axial fan.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: August 3, 2021
    Assignee: Black & Decker Inc.
    Inventors: John B. Fogle, Colin M. Crosby, David J. Smith, Merritt J. Tennison, Madhur M. Purohit
  • Patent number: 11054349
    Abstract: A method for preparation of a dried blood sample for multiplexing of analytes includes the steps of mixing an Internal Standard solution with a first diluent in a vessel, the Internal Standard solution including a plurality of different Internal Standards, adding the dried blood sample to the vessel, sonicating the vessel containing the Internal Standard solution, the first diluent and the dried blood sample, and removing the dried blood sample from the vessel. The Internal Standard solution can include a plurality of Internal Standards. The Internal Standard solution can include at least 15 Internal Standards. The dried blood sample can be generated using less than 50 ?L of blood. The dried blood sample can be generated using less than 10 ?L of blood. The first diluent can include methanol or a mixture of water and methanol.
    Type: Grant
    Filed: April 29, 2020
    Date of Patent: July 6, 2021
    Assignee: ALCALA PHARMACEUTICAL, INC.
    Inventors: David J. Smith, Matthew D. Rifat, Christian Tagwerker, Irfan Baig, Ranulu Samanthi de Zoysa, Eric J. Brunson
  • Publication number: 20210194320
    Abstract: A brushless direct-current (BLDC) motor is provided with a stator assembly including a stator core and stator windings wound around stator teeth, a rotor shaft extending along a longitudinal axis, and a rotor including a rotor core mounted on the rotor shaft supporting at least one permanent magnet. A circuit board is provided including a main body and at least one leg radially projecting from the main body to support at least one magnetic sensor near the permanent magnet. The leg of the circuit board oriented along a radial plane that intersects the stator windings.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 24, 2021
    Inventors: David J. SMITH, Justin H. AYERS, Abraham SANCHEZ
  • Publication number: 20210187707
    Abstract: A power tool includes a housing and a brushless motor with a rotor and a stator assembly. The motor defines a motor envelope bounded by a rear plane at a rearmost point of the stator assembly and rotor, a front plane at a frontmost point of the stator assembly and rotor, and a generally cylindrical boundary surrounding a radially outermost portion of the stator assembly and rotor. A rotor shaft is rotatably driven by the rotor. A transmission includes an input member rotatably driven by the rotor shaft and an output member. A first bearing supporting the rotor shaft is at least partially received within the motor envelope. A second bearing supporting the rotor shaft or a component of the transmission is at least partially received within the motor envelope. A support plate supporting a component of the transmission may be at least partially received within the motor envelope.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 24, 2021
    Inventors: David J. SMITH, Justin H. AYERS, Abraham SANCHEZ, Sandip D. PATEL, Alvaro B. HAESBAERT, Samantha CUNNINGHAM
  • Publication number: 20210194319
    Abstract: A power tool is provided with a tool housing, a support plate provided within the tool housing, a rear tool cap mounted on a rear end of the tool housing, and a brushless direct-current (BLDC) motor received within the housing. The motor includes a stator assembly having a stator core and stator windings, a front motor bearing supported by the support plate, a rear motor bearing supported by the rear tool cap, and a rotor including a rotor core and a magnet ring mounted around the rotor core. The rotor core defines an annular recess within which at portion of the front bearing and a portion of the support plate are located such that the a radial plane intersects the front bearing, the magnet ring, and the stator core.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 24, 2021
    Inventors: David J. SMITH, Justin H. AYERS, Abraham SANCHEZ
  • Publication number: 20210047180
    Abstract: A production system includes a first reaction chamber and a second reaction chamber. The first reaction chamber is configured to receive a first hydrocarbon stream therein through an input port and to form carbon seeds and hydrogen gas therein via hydrocarbon pyrolysis of the first hydrocarbon stream. The second reaction chamber includes a first input port and a second input port. The second reaction chamber is configured to receive the carbon seeds through the first input port and a second hydrocarbon stream through the second input port, and to form carbon product elements and additional hydrogen gas in the second reaction chamber via hydrocarbon pyrolysis of the second hydrocarbon stream. The carbon product elements represent the carbon seeds with additional carbon structure grown on the carbon seeds.
    Type: Application
    Filed: August 14, 2019
    Publication date: February 18, 2021
    Inventors: Richard Louis Hart, David J. Smith, David W. Woodruff, Mark Daniel Doherty
  • Publication number: 20200343789
    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: Application
    Filed: April 23, 2020
    Publication date: October 29, 2020
    Inventors: John B. Fogle, Dustin Jeffries, Michael R. Marjomma, Kevin L. Pulley, Vincent W. Zou, Jarrett A. Dunston, David J. Smith, Rene Thieme, Tim Heimrich, Tobias Heep, Daniel Bernhart, Dieter Schmidtfrerick
  • Publication number: 20200343780
    Abstract: A brushless direct-current motor is provided includes an inner stator and an outer rotor. A rotor shaft extends through a stator core of the inner stator. A first end cap includes a radial back plate disposed on a first side of the stator and a front center opening through which the rotor shaft is supported via a front bearing. A second end cap includes an inner annular body extending axially inwardly and forming a rear center opening, an outer annular body, and a main body extending on a second side of the stator. The inner annular body includes a first portion that extends at least partially into an opening of the stator core and supports the rotor shaft via a rear bearing, and a second portion rearward of the first portion that received a rear end of the rotor shaft therein and houses a sensor board therein.
    Type: Application
    Filed: April 23, 2020
    Publication date: October 29, 2020
    Inventors: John B. Fogle, Dustin Jeffries, Michael R. Marjomma, Kevin L. Pulley, Vincent W. Zou, Jarrett A. Dunston, David J. Smith, Rene Thieme, Tim Heimrich, Tobias Heep, Daniel Bernhart, Dieter Schmidtfrerick
  • Publication number: 20200321825
    Abstract: A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and in contact with an inner curved surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore.
    Type: Application
    Filed: June 22, 2020
    Publication date: October 8, 2020
    Inventors: Colin M. Crosby, Merritt J. Tennison, Ryan F. Schroeder, Jarrett A. Dunston, David J. Smith, Barak N. Gohn, Andrew M. Palich, Justin H. Ayers
  • Publication number: 20200321826
    Abstract: A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and in contact with an inner curved surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore.
    Type: Application
    Filed: June 22, 2020
    Publication date: October 8, 2020
    Inventors: Colin M. Crosby, Merritt J. Tennison, Ryan F. Schroeder, Jarrett A. Dunston, David J. Smith, Barak N. Gohn, Andrew M. Palich, Justin H. Ayers
  • Publication number: 20200309742
    Abstract: A method for extracting pharmacogenetic DNA from dried blood that is retained in a solid resin collection device includes one or more of the steps of combining the dried blood and at least a portion of the solid resin collection device in a first vessel, sonicating the first vessel containing the dried blood and at least a portion of the solid resin collection device, moving at least some of the contents of the first vessel including the portion of the solid resin collection device to a solid resin spin column, adding an elution buffer to the solid resin spin column, centrifuging the solid resin spin column so that at least some of the contents of the solid resin spin column are transferred to a second vessel, and processing the contents of the second vessel by conducting one of capillary electrophoresis, Next-Generation Sequencing, DNA sequencing or genotyping, and mass spectrometry-based sequencing on the contents of the second vessel.
    Type: Application
    Filed: March 16, 2020
    Publication date: October 1, 2020
    Inventors: David J. Smith, Christian Tagwerker, Matthew D. Rifat
  • Patent number: 10786894
    Abstract: A power tool is provided including a tool housing and a brushless DC (BLDC) motor disposed within the tool housing. The motor includes a stator assembly and a rotor assembly having a rotor lamination stack mounted on a rotor shaft to rotate therewith. The power tool also includes a power module for driving the motor, which includes: a printed circuit board, power switches operatively connected to the motor disposed on a first surface of the printed circuit board, positional sensors disposed on a second surface of the printed circuit board around a periphery of a center portion of the printed circuit board, and a heat sink having a substantially planar surface facing the second surface of the printed circuit board and disposed between the motor and the printed circuit board. The heat sink includes a through-hole therein sized to axially expose the positional sensors in the direction of the motor.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 29, 2020
    Assignee: Black & Decker Inc.
    Inventors: Marcell E. Coates, Madhur M. Purohit, Timothy J. Seeley, Joshua M. Lewis, David J. Smith, Bryce A. Wells
  • Publication number: 20200256772
    Abstract: A method for qualitative and quantitative multiplexing of drug analytes from dried blood samples includes the steps of mixing an Internal Standard solution with a first diluent in a vessel, adding the dried blood sample to the vessel, sonicating the vessel containing the Internal Standard solution, the first diluent and the dried blood sample, removing the dried blood sample from the vessel so that a final sample can be attained, and analyzing at least a portion of the final sample using one of LC-MS and LC-MS/MS to simultaneously determine the presence or absence of a plurality of different analytes in the dried blood sample. The Internal Standard solution can include at least 8, 15, 25 or 50 Internal Standards. The dried blood sample is generated using less than 50 ?L, 20 ?L or 10 ?L of blood. The step of analyzing includes simultaneously determining the presence or absence of at least 15, 60, 90 or 130 different analytes.
    Type: Application
    Filed: April 29, 2020
    Publication date: August 13, 2020
    Inventors: David J. Smith, Matthew D. Rifat, Christian Tagwerker, Irfan Baig, Ranulu Samanthi de Zoysa, Eric J. Brunson
  • Publication number: 20200249227
    Abstract: A method for analyzing a urine sample includes binding a plurality of analytes from a urine sample to an adsorbent; and analyzing the plurality of analytes using a molecular analyzer to detect evidence of at least one water soluble vitamin and at least one fat soluble vitamin in the urine sample. The method can also include analyzing the urine sample using the molecular analyzer to detect a thyroid analyte selected from the group consisting of 3-5-Diiodo-L-Thyronine (LT2), 3-3?-5?-L-Thyroxine (LT3) and L-Thyroxine (LT4). Prior to analyzing the analytes, the method can include one or more of: washing the solid phase extraction column with a methanol solution after the step of binding; eluting the plurality of analytes from the adsorbent with at least one of (i) a mixture of isopropanol and methanol, and (ii) a mixture of ethyl acetate and methanol, to form an eluate; evaporating the eluate; and reconstituting the evaporated eluate with a mixture of methanol and water.
    Type: Application
    Filed: January 27, 2020
    Publication date: August 6, 2020
    Inventors: David J. Smith, Christian Tagwerker, Irfan Baig
  • Patent number: 10727715
    Abstract: A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and in contact with an inner curved surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: July 28, 2020
    Assignee: Black & Decker Inc.
    Inventors: Colin M. Crosby, Merritt J. Tennison, Ryan F. Schroeder, Jarrett A. Dunston, David J. Smith, Barak N. Gohn, Andrew M. Palich, Justin H. Ayers
  • Publication number: 20200180134
    Abstract: A power tool is provided including a brushless DC (BLDC) motor having a stator assembly and a rotor; a substantially-cylindrical motor housing having an open end for receiving the stator assembly, a rear end, a substantially-cylindrical bearing pocket formed in the rear end to receive the rear bearing of the motor therein, and a radially-extending slot formed at or near its rear end; and a positional sensor board radially received within the slot along a central receiving axis. The positional sensor board includes a curved inner edge shaped to be positioned around the bearing pocket and includes positional sensors mounted around the curved inner edge and facing the rotor to sense a rotational position of the rotor. The curved inner edge is disposed on a side corner of the positional sensor board such that the positional sensor board is asymmetrically-shape in a direction of the receiving axis.
    Type: Application
    Filed: February 19, 2020
    Publication date: June 11, 2020
    Inventors: Andrew M. Palich, Michael R. Marjomaa, Kevin L. Pulley, David J. Smith, Dennis A. Bush, Mark T. Cherry
  • Publication number: 20200169142
    Abstract: A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and in contact with an inner curved surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore.
    Type: Application
    Filed: January 29, 2020
    Publication date: May 28, 2020
    Inventors: Colin M. Crosby, Merritt J. Tennison, Ryan F. Schroeder, Jarrett A. Dunston, David J. Smith, Barak N. Gohn, Andrew M. Palich, Justin H. Ayers
  • Publication number: 20200161927
    Abstract: A brushless motor is provided including a rotor rotating around a center axis and a stator including a stator core and stator teeth radially extending from the stator core forming stator slots therebetween. Each stator tooth includes a radial main body and a tooth tip extending substantially laterally from an end of the radial main body opposite the stator core, and stator windings are wound around the stator teeth. Winding retention wedges are axially received within the slots, each winding retention wedge comprising: a first portion received within gaps formed between tooth tips of adjacent stator teeth, and a second portion received at least partially between adjacent stator windings to apply a force substantially in a range of a radially-inward direction to a lateral direction to the adjacent stator windings.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 21, 2020
    Inventors: Michael R. MARJOMAA, John B. FOGLE, Kevin L. PULLEY, David J. SMITH