Patents by Inventor Earl M. Ortt
Earl M. Ortt 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).
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Publication number: 20110298313Abstract: A permanent magnet electric motor has a stator and a rotor. The stator has a stator housing with at least a North pole and a South pole, each pole including permanent magnets affixed to an inner surface of the stator housing, where at least two of the magnets within a pole have dissimilar characteristics, e.g., different widths or different grades of demagnetization resistance.Type: ApplicationFiled: May 20, 2011Publication date: December 8, 2011Applicant: Black & Decker Inc.Inventors: Stephen Osborne, Colin Crosby, Sankarshan Murthy, Hung T. Du, Earl M. Ortt
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Publication number: 20110278966Abstract: A permanent magnet electric motor has a stator and a rotor. The stator has a stator housing with at least a North pole and a South pole. Each pole includes at least two permanent magnets arranged on an inner surface of the stator housing near the pole tips and an overmold of magnetic material molded around the permanent magnets and over the inner surface of the stator between the permanent magnets. Alternatively, an overmold of magnetic material may be provided over an inner surface of the stator, where the thickness of the overmold layer is greater near tips of each pole than in the middle portion of each pole.Type: ApplicationFiled: May 20, 2011Publication date: November 17, 2011Applicant: Black & Decker Inc.Inventors: Stephen Osborne, Colin Crosby, Sankarshan Murthy, Hung T. Du, Earl M. Ortt
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Publication number: 20110126399Abstract: An armature for an electric motor has a lamination stack on a shaft with a commutator mounted on one end of the shaft. Magnet wires wound in slots in the lamination stack, the commutator and armature shaft are at least partially encapsulated in thermoset. The commutator has a commutator ring divided into a plurality of segments with slots between the segments that are filled with a second plastic when the commutator is made by molding a core of the second plastic, such as phenolic, in the commutator ring before the commutator ring is mounted on the armature shaft. Prior to molding the thermoset, the commutator ring is sealed. The seal prevents the thermoset from flowing into the slots between the commutator ring segments or over the commutator ring.Type: ApplicationFiled: February 9, 2011Publication date: June 2, 2011Inventors: David J. Smith, John C. Stone, Robert Tumberlinson, Earl M. Ortt
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Publication number: 20110115314Abstract: A power tool has a motor having a stator made by separately forming pole pieces, return path pieces and field coils. The field coils are placed over necks of the pole path pieces and the return path pieces are affixed to the pole pieces. An armature having an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. The field coils may be formed so that they extend beyond pole tips of the pole pieces.Type: ApplicationFiled: January 14, 2011Publication date: May 19, 2011Inventors: Hung T. Du, Earl M. Ortt, Brandon L. Verbrugge, Garrett P. Mccormick, Michael A. Zemlock, Eric J. Samuelsen, Kevin M. Hogan, Jiaqi Zhang, Ren Hong Wang, Frank A. Mannarino, Allison A. Smith, Therese M. Rakosky, Kyle J. Wheaton, Antonios M. Nicolaidis, Shane Ashley Moll, Eric L. Bernstein
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Patent number: 7908736Abstract: An armature for an electric motor has a lamination stack on a shaft with a commutator mounted on one end of the shaft. Magnet wires wound in slots in the lamination stack, the commutator and armature shaft are at least partially encapsulated in thermoset. The commutator has a commutator ring divided into a plurality of segments with slots between the segments that are filled with a second plastic when the commutator is made by molding a core of the second plastic, such as phenolic, in the commutator ring before the commutator ring is mounted on the armature shaft. Prior to molding the thermoset, the commutator ring is sealed. The seal prevents the thermoset from flowing into the slots between the commutator ring segments or over the commutator ring.Type: GrantFiled: November 21, 2007Date of Patent: March 22, 2011Assignee: Black & Decker Inc.Inventors: David J. Smith, John C. Stone, Robert Tumberlinson, Earl M. Ortt
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Patent number: 7893583Abstract: A power tool has a motor having a stator made by separately forming pole pieces, return path pieces and field coils. The field coils are placed over necks of the pole path pieces and the return path pieces are affixed to the pole pieces. An armature having an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. The field coils may be formed so that they extend beyond pole tips of the pole pieces.Type: GrantFiled: March 6, 2006Date of Patent: February 22, 2011Assignee: Black & Decker Inc.Inventors: Hung T. Du, Earl M. Ortt, Brandon L. Verbrugge, Garrett P. McCormick, Michael A. Zemlock, Kevin M. Hogan, Jiaqi Zhang, Ren Hong Wang, Frank A. Mannarino, Spencer G. Maid, Shane Ashley Moll, James C. Benton
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Publication number: 20100308673Abstract: A power tool has a housing a housing having an electronically commutated motor disposed therein. The motor has a rotor and a stator. The rotor has permanent magnets. The stator has a lamination stack and windings wound therein. Features are provided to provide double insulation.Type: ApplicationFiled: July 28, 2010Publication date: December 9, 2010Inventors: Madhur M. Purohit, Earl M. Ortt
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Publication number: 20100300641Abstract: A power tool has a housing a housing having an electronically commutated motor disposed therein. The motor has a rotor and a stator. The rotor has permanent magnets. The stator has a lamination stack and windings wound therein. Features are provided to provide double insulation.Type: ApplicationFiled: July 28, 2010Publication date: December 2, 2010Inventors: Madhur M. PUROHIT, Earl M. Ortt
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Patent number: 7791232Abstract: A power tool has a housing a housing having an electronically commutated motor disposed therein. The motor has a rotor and a stator. The rotor has permanent magnets. The stator has a lamination stack and windings wound therein. Features are provided to provide double insulation.Type: GrantFiled: May 2, 2008Date of Patent: September 7, 2010Assignee: Black & Decker Inc.Inventors: Madhur M. Purohit, Earl M. Ortt
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Patent number: 7687964Abstract: An electric motor has a field assembly, such as a stator, for a dynamoelectric machine has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated with insulating sleeves or insulating slot liners. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed.Type: GrantFiled: April 17, 2009Date of Patent: March 30, 2010Assignee: Black & Decker Inc.Inventors: Hung T. Du, Brandon L. Verbrugge, Earl M. Ortt, Michael J. Agnes, Michael A. Zemlock, Robert G. Kusmierski, David J. Smith
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Publication number: 20100033036Abstract: An electric motor has a rotor and a stator. The rotor or the stator has arced permanent magnets that have essentially the same inner radius (IR) and outer radius (OR). In an aspect, the stator has a stator housing having a plurality of poles. Each pole includes a plurality of flat magnets affixed to an inner surface of the stator housing. In an aspect, flats on the outside of the stator housing key the stator assembly in a power tool housing. In an aspect, flat magnets are pre-magnetized, pre-assembled with alternating magnetic polarities, inserted into a stator housing, and remagnetized to a final, desired magnetic polarity configuration. In an aspect, pre-magnetized magnets and unmagnetized magnets are pre-assembled with unmagnetized magnets between magnetized magnets, the pre-assembled magnets inserted into a stator housing, and the unmagnetized magnets magnetized to a final, desired magnetic polarity configuration.Type: ApplicationFiled: October 12, 2007Publication date: February 11, 2010Applicant: BLACK & DECKER INC.Inventors: Earl M. Ortt, Hung T. Du, Sankarshan Murthy
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Publication number: 20100013336Abstract: A permanent magnet electric motor has a stator and a rotor The stator has a stator housing with opposed axial ends and features skived in the stator housing to extend radially inwardly from an inner surface of the stator housing proximate to at least one of the axial ends of the stator housing. An overmolding of material is molded around the features. In an aspect, the overmolding of material is a magnetic composite material and is molded to form magnets. In an aspect, magnets are placed on the inner surface of the stator housing and the overmolding of material is a plastic that is over molded around the magnets and the features. In an aspect, the features hold the magnets in place during the molding of the overmolding around the magnets. In an aspect, the magnets have essentially the same inner radius and outer radius and the overmolding of material is thicker at edges of each magnet than at the center of each magnet.Type: ApplicationFiled: October 12, 2007Publication date: January 21, 2010Applicant: BLACK & DECKER INC.Inventors: Earl M. Ortt, David J. Smith, Eric E. Hatfield
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Publication number: 20090275273Abstract: A power tool has a housing a housing having an electronically commutated motor disposed therein. The motor has a rotor and a stator. The rotor has permanent magnets. The stator has a lamination stack and windings wound therein. Features are provided to provide double insulation.Type: ApplicationFiled: May 2, 2008Publication date: November 5, 2009Applicant: BLACK & DECKER INC.Inventors: Madhur M. Purohit, Earl M. Ortt
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Publication number: 20090200891Abstract: An electric motor has a field assembly, such as a stator, for a dynamoelectric machine has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated with insulating sleeves or insulating slot liners. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed.Type: ApplicationFiled: April 17, 2009Publication date: August 13, 2009Applicant: Black & Decker Inc.Inventors: Hung T. Du, Brandon L. Verbrugge, Earl M. Ortt, Michael J. Agnes, Michael A. Zemlock, Robert G. Kusmierski, David J. Smith
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Publication number: 20090159737Abstract: A tool and method for winding and forming a field coil for field assembly, such as a stator, includes separable tool halves defining a winding cavity therebetween. The winding cavity receives magnet wire that is wound therein, such as by rotating the tool or a winding nozzle. The magnet wire generally conforms to the shape of the winding cavity such that when the tool halves are separated, a field coil having a net shape is produced. Once the magnet wire is sufficiently deposited within the winding cavity, wires of the coil may be bonded together either through a resistive heating process such as by passing an electrical current through the coil or through other heating or chemical bonding methods to thereby maintain the net shape of the field coil once it is removed from the tool.Type: ApplicationFiled: February 26, 2009Publication date: June 25, 2009Applicant: BLACK & DECKER INC.Inventors: Earl M. Ortt, David E. Abbott, John R. Cochran, Garrett P. McCormick
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Publication number: 20090126184Abstract: An armature for an electric motor has a lamination stack on a shaft with a commutator mounted on one end of the shaft. Magnet wires wound in slots in the lamination stack, the commutator and armature shaft are at least partially encapsulated in thermoset. The commutator has a commutator ring divided into a plurality of segments with slots between the segments that are filled with a second plastic when the commutator is made by molding a core of the second plastic, such as phenolic, in the commutator ring before the commutator ring is mounted on the armature shaft. Prior to molding the thermoset, the commutator ring is sealed. The seal prevents the thermoset from flowing into the slots between the commutator ring segments or over the commutator ring.Type: ApplicationFiled: November 21, 2007Publication date: May 21, 2009Applicant: Black & Decker Inc.Inventors: David J. Smith, John C. Stone, Robert Tumberlinson, Earl M. Ortt
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Patent number: 7528520Abstract: An electric motor has a field assembly, such as a stator, for a dynamoelectric machine has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated with insulating sleeves or insulating slot liners. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed.Type: GrantFiled: October 4, 2006Date of Patent: May 5, 2009Assignee: Black & Decker Inc.Inventors: Hung T. Du, Brandon L. Verbrugge, Earl M. Ortt, Michael J. Agnes, Michael A. Zemlok, Robert G. Kusmierski, David J. Smith
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Patent number: 7513029Abstract: A tool and method for winding and forming a field coil for field assembly, such as a stator, includes separable tool halves defining a winding cavity therebetween. The winding cavity receives magnet wire that is wound therein, such as by rotating the tool or a winding nozzle. The magnet wire generally conforms to the shape of the winding cavity such that when the tool halves are separated, a field coil having a net shape is produced. Once the magnet wire is sufficiently deposited within the winding cavity, wires of the coil may be bonded together either through a resistive heating process such as by passing an electrical current through the coil or through other heating or chemical bonding methods to thereby maintain the net shape of the field coil once it is removed from the tool.Type: GrantFiled: February 1, 2006Date of Patent: April 7, 2009Assignee: Black & Decker Inc.Inventors: Earl M. Ortt, David E. Abbott, John R. Cochran, Garrett P. McCormick
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Publication number: 20090021090Abstract: A power tool has a motor having a stator made by separately forming pole pieces, return path pieces and field coils. The field coils are placed over necks of the pole path pieces and the return path pieces are affixed to the pole pieces. An armature having an outside diameter of at least 0.625 the outside diameter of the stator is placed in the stator. The field coils may be formed so that they extend beyond pole tips of the pole pieces.Type: ApplicationFiled: March 6, 2006Publication date: January 22, 2009Applicant: BLACK AND DECKER INC.Inventors: Hung T. Du, Earl M. Ortt, Brandon L. Verbrugge, Garrett P. McCormick, Michael A. Zemlock, Eric J. Samuelsen, Kevin M. Hogan, Jiaqi Zhang, Ren Hong Wang, Frank A. Mannarino, Allison A. Smith, Spencer G. Maid, Therese M. Rakosky, Kyle J. Wheaton, Antonios M. Nicolaidis, Shane Ashley Moll, James C. Benton, Eric L. Bernstein
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Patent number: 7233091Abstract: An electric motor has a field assembly, such as a stator, has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed. The pole pieces and return path pieces are formed with mating features that are mated to hold the pole pieces and return path pieces together.Type: GrantFiled: September 3, 2004Date of Patent: June 19, 2007Assignee: Black & Decker Inc.Inventors: Hung T. Du, Brandon L. Verbrugge, Earl M. Ortt, Michael J. Agnes, Michael A. Zemlok, Robert G. Kusmierski, David J. Smith