Patents by Inventor Mohammad Reza Etemad
Mohammad Reza Etemad 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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Patent number: 6912773Abstract: The invention provides a stator coil construction in which the thickness of the stator windings is reduced without the need for interconnections within the stator. The reduction in thickness of the stator windings is accomplished by wire flattening.Type: GrantFiled: November 7, 2002Date of Patent: July 5, 2005Assignee: The Turbo Genset Company LimitedInventors: Keith Robert Pullen, Arnoldo Fenocchi, Mohammad Reza Etemad
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Patent number: 6774519Abstract: A rotary electrical machine (1) has at least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first position (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.Type: GrantFiled: June 3, 2002Date of Patent: August 10, 2004Assignee: The Turbo Genset CompanyInventors: Keith Robert Pullen, Mohammad Reza Etemad, Arnoldo Fenocchi
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Publication number: 20030173858Abstract: The invention provides a stator coil construction in which the thickness of the stator windings is reduced without the need for interconnections within the stator. The reduction in thickness of the stator windings is accomplished by wire flattening.Type: ApplicationFiled: November 7, 2002Publication date: September 18, 2003Inventors: Keith Robert Pullen, Arnoldo Fenocchi, Mohammad Reza Etemad
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Publication number: 20020149274Abstract: A rotary electrical machine (1) has at least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first position (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.Type: ApplicationFiled: June 3, 2002Publication date: October 17, 2002Inventors: Keith Robert Pullen, Mohammad Reza Etemad, Arnoldo Fenocchi
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Patent number: 6424069Abstract: A rotary electrical machine (1) has at least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first position (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.Type: GrantFiled: December 21, 1999Date of Patent: July 23, 2002Assignee: The Turbo Genset Company LimitedInventors: Keith Robert Pullen, Mohammad Reza Etemad, Arnoldo Fenocchi
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Patent number: 6304011Abstract: A rotary electrical machine which has a plurality of disc-shaped stator stages and a plurality of disc-shaped rotor stages, each of the rotor stages being respectively alternately interleaved with the stator stages. A space is provided between each stator stage and its adjacent rotor stage. Each of the stator stages is provided with at least two stator windings, defining a passage therebetween adjacent windings. A coiled pipe is disposed in or formed integrally with each of the passages in substantially the same plane as the stator stage, such that the outlet of one pipe is coupled with the inlet of the pipe disposed in the adjacent passage. In use, fluid, for example air, helium, water or oil is caused to flow around the coiled pipes in the passages between the stator windings. At the same time, cooling gas, for example, air or helium, is caused to pass through the stator-rotor spaces so as to cool the magnets, etc. and the retention hoops, etc.Type: GrantFiled: June 21, 1999Date of Patent: October 16, 2001Assignee: The Turbo Genset Company LimitedInventors: Keith Robert Pullen, Arnold Fenocchi, Justin Arthur Hall, Mohammad Reza Etemad
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Patent number: 6195869Abstract: A retention ring (1) is applied to a disc rotor assembly (3) which comprises a plurality of substantially equiangularly spaced magnets (7). The ring is expanded by driving it over a tapered mandrel (13) onto a rim (5) of the rotor assembly.Type: GrantFiled: June 21, 1999Date of Patent: March 6, 2001Assignee: Turbo Genset CompanyInventors: Keith Robert Pullen, Arnold Fenocchi, Justin Arthur Hall, Mohammad Reza Etemad
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Patent number: 6104111Abstract: A rotary electrical machine (1) has a least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first position (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.Type: GrantFiled: November 26, 1997Date of Patent: August 15, 2000Assignee: Turbo Genset Co, Ltd.Inventors: Keith Robert Pullen, Mohammad Reza Etemad, Arnoldo Fenocchi
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Patent number: RE37844Abstract: A rotary electrical machine (1) has at least one stator (23). The stator is provided with at least one radial channel (107) for ducting cooling air. The channel (107) extends between a first position (113) at or substantially near the rim (109) of a winding region of the stator (23) and a second position (119) at or substantially near the center (51) of the winding region. The machine (1) has cooling means (91-97) for causing cooling air to enter the radial channel (107) via the second position (119) and exit via the first portion (113). The stator may have electrical windings arranged as coil sectors (183-197) disposed substantially equi-angularly in a generally circular pattern. At least some of the coil sectors are wound in a generally spiral fashion when viewed axially. A rotor (13), for the machine may have a plurality of equi-angularly spaced magnets (127), which are generally circular but with a cut-away portion, when viewed axially.Type: GrantFiled: October 20, 2000Date of Patent: September 17, 2002Assignee: The Turbo Genset Company, Ltd.Inventors: Keith Robert Pullen, Mohammad Reza Etemad, Arnoldo Fenocchi