Patents by Inventor Drew Kallen
Drew Kallen 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: 9025809Abstract: Disclosed loudspeakers include a frame, a magnetic yolk affixed to the frame, a voicecoil, a spider, a resilient surround, and a cone. The yoke includes a slotted sidewall and a central slug that form an air-gap. The voicecoil is disposed within the gap and includes a former, with top and bottom edges, and at least one winding. The voicecoil moves when receiving alternating electrical potentials. The spider has a flexible portion, has rigid members extending through the yolk slots, and has a channel affixed to the former bottom edge such that the channel is no wider than the former and winding(s). The cone includes an inner portion affixed to the former top edge and an outer portion affixed to the frame through the surround, wherein the inner portion includes rigid members capable of movement within the sidewall slots with movement of the voicecoil. Optionally, the former has apertures therethrough.Type: GrantFiled: January 3, 2014Date of Patent: May 5, 2015Assignee: Rockford CorporationInventors: Drew Kallen, James C. Strickland
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Patent number: 9008348Abstract: Disclosed loudspeakers include a frame, a magnetic yolk affixed to the frame, a voicecoil, a spider, a resilient surround, and a cone. The yoke includes a slotted sidewall and a central slug that form an air-gap. The voicecoil is within the gap and includes a former, with top and bottom edges, and at least one winding on the former. The voicecoil moves when receiving alternating electrical potentials. The spider has a flexible outer portion, has an inner portion with rigid members that always extend through the yolk slots, and is affixed to the former bottom edge. The cone includes an inner portion affixed to the former top edge and an outer portion affixed to the frame through the surround, wherein the inner portion includes rigid members capable of movement within the sidewall slots with movement of the voicecoil.Type: GrantFiled: January 3, 2014Date of Patent: April 14, 2015Assignee: Rockford CorporationInventors: Drew Kallen, James C. Strickland
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Publication number: 20100303276Abstract: A loudspeaker configured to include a suspension system which maximizes performance. Materials of the suspension system are selected for ease and effectiveness of manufacturing.Type: ApplicationFiled: May 29, 2009Publication date: December 2, 2010Applicant: Rockford CorporationInventor: Drew Kallen
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Patent number: 7088841Abstract: A subwoofer having a novel component geometry that permits large voice coils and high efficiency heat transfer capability. The subwoofer comprises a frame having an outside and an inside, a central portion, radial heat sink fins, lower ventilation apertures, and a bottom portion having a bottom vent aperture. A motor unit comprising a case and a pole unit, the case having lower ventilation apertures and the pole unit having a cylindrical portion having a center aperture, wherein the cylindrical portion of the pole unit is of a diameter less than the diameter of the case, defining a first chamber area. The lower ventilation apertures of the frame, and the lower ventilation apertures of the motor unit are aligned to allow air to flow from the outside of the subwoofer into the first chamber area.Type: GrantFiled: August 15, 2003Date of Patent: August 8, 2006Assignee: Diamond Audio Technology, Inc.Inventor: Drew Kallen
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Publication number: 20040086144Abstract: A subwoofer having a novel component geometry that permits large voice coils and high efficiency heat transfer capability. The subwoofer comprises a frame having an outside and an inside, a central portion, radial heat sink fins, lower ventilation apertures, and a bottom portion having a bottom vent aperture. A motor unit comprising a case and a pole unit, the case having lower ventilation apertures and the pole unit having a cylindrical portion having a center aperture, wherein the cylindrical portion of the pole unit is of a diameter less than the diameter of the case, defining a first chamber area. The lower ventilation apertures of the frame, and the lower ventilation apertures of the motor unit are aligned to allow air to flow from the outside of the subwoofer into the first chamber area.Type: ApplicationFiled: August 15, 2003Publication date: May 6, 2004Applicant: Diamond Audio Technology, Inc.Inventor: Drew Kallen
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Patent number: 5624155Abstract: An improved electromagnetic actuator includes a first assembly, a second assembly disposed for relative movement with respect to the first assembly and at least a first flexure interconnecting the first assembly and the second assembly. The first assembly includes a core having a first magnetic pole of a first polarity in a second magnetic pole of a second polarity. The second assembly includes an electrical current conductive coil having a first coil portion and a second coil portion. The first magnetic pole is in a facing relationship to the first coil portion and the second magnetic pole is in a facing relationship to the second coil portion. The first coil portion and the second coil portion are arranged so that an electrical current in the coil develops added a flux current cross products at each of the first coil portion and the second coil portion. One of the first assembly and the second assembly includes a magnetic flux return path between the first coil portion and the second coil portion.Type: GrantFiled: January 17, 1995Date of Patent: April 29, 1997Assignee: Aura Systems, Inc.Inventors: Jeffrey Bluen, Dennis C. Bulgatz, Drew Kallen
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Patent number: 5424592Abstract: An improved electromagnetic actuator includes a first assembly, a second assembly disposed for relative movement with respect to the first assembly and at least a first flexure interconnecting the first assembly and the second assembly. The first assembly includes a core having a first magnetic pole of a first polarity in a second magnetic pole of a second polarity. The second assembly includes an electrical current conductive coil having a first coil portion and a second coil portion. The first magnetic pole is in a facing relationship to the first coil portion and the second magnetic pole is in a facing relationship to the second coil portion. The first coil portion and the second coil portion are arranged so that an electrical current in the coil develops additive flux current cross products at each of the first coil portion and the second coil portion. One of the first assembly and the second assembly includes a magnetic flux return path between the first coil portion and the second coil portion.Type: GrantFiled: July 1, 1993Date of Patent: June 13, 1995Assignee: Aura Systems, Inc.Inventors: Jeffrey Bluen, Dennis C. Bulgatz, Drew Kallen