The present invention provides heating elements and methods for their fabrication and use. The heating elements of this invention include a spirally shaped structure having a plurality of spiral forms, and may contain a thermally conductive, electrically insulated polymeric coating, such as a fluoro
The present invention provides heating elements and methods for their fabrication and use. The heating elements of this invention include a spirally shaped structure having a plurality of spiral forms, and may contain a thermally conductive, electrically insulated polymeric coating, such as a fluorocarbon resinous coating of about 0.001-0.020 in. in thickness. The preferred spirally shaped heating elements of this invention provide a lower, preferably substantially lower, flux or watt density than that for a Tubular Heating Element of substantially similar Active Element Volume (in3), wherein said spirally shaped heating element has the same or greater overall wattage rating (total watts) than the Tubular Heating Element. The heating elements of this invention preferably have an Effective Relative Heated Surface Area of about 5-60 in2/in3,with a target range of about 20-30 in2/in3,but can generate a heat flux of about 10-50 w/in2.
대표청구항▼
1. A method of manufacturing a heating element comprising: winding a first resistance heating material in a continuous spiral path having a plurality of spiral forms disposed in three dimensions along a longitudinal axis, and connected by "u" shaped bends, coating a portion of said resistance hea
1. A method of manufacturing a heating element comprising: winding a first resistance heating material in a continuous spiral path having a plurality of spiral forms disposed in three dimensions along a longitudinal axis, and connected by "u" shaped bends, coating a portion of said resistance heating material with an electrically insulating, polymeric material, whereby said resulting heating element has a first radius of curvature at ambient temperature, and a second radius of curvature at 160° F., as measured on the surface of the polymer material, which is substantially greater than said first radius of curvature. 2. The method of claim 1 wherein said second radius of curvature is at least 1% greater than said first radius of curvature. 3. The method of claim 1 wherein said coating step comprises dip coating, electrostatic deposition, molding, painting, or a combination thereof. 4. The method of claim 1 wherein said coating step comprises applying a thermoplastic or thermosetting resin in a thickness of about 0.001-0.020 inches. 5. A method of manufacturing a heating element comprising: winding a first resistance heating material in a continuous spiral path having a plurality of connected individual spiral forms disposed in three dimensions along a longitudinal axis, a plurality of said connected individual spiral forms including a plurality of partially overlapping turns, coating a portion of said resistance heating material with an electrically insulating, polymeric layer, whereby said resulting heating element has a first radius of curvature at ambient temperature, and a second radius of curvature at 160° F., as measured on the surface of the polymer material, which is substantially greater than said first radius of curvature. 6. The method of claim 5, wherein said individual spiral forms are connected to adjacent individual spiral forms by "u" shaped bends. 7. The method of claim 6, wherein said second radius of curvature is at least 1% greater than said first radius of curvature. 8. The method of claim 6, wherein said coating step comprises dip coating, electrostatic deposition, molding, painting, or a combination thereof. 9. The method of claim 6, wherein said coating step comprises applying a thermoplastic or thermosetting resin in a thickness of about 0.001-0.020 inches. 10. A heating element comprising a first resistance heating material wound in a continuous spiral path having a plurality of spiral forms disposed in three dimensions along a longitudinal axis, and connected by "u" shaped bends, at least a portion of said first resistance heating material coated with an electrically insulating, polymeric material, whereby said resulting heating element has a first radius of curvature at ambient temperature, and a second radius of curvature at 160° F., as measured on the surface of the polymer material, which is substantially greater than said first radius of curvature. 11. The heating element of claim 10, wherein the polymeric material includes a thermoplastic or thermosetting resin in a thickness of about 0.001-0.020 inches. 12. The heating element of claim 10, wherein a plurality of said spiral forms include a plurality of partially overlapping turns.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (166)
Schwiebert William H. (Cardiff CA) Kemplin Richard M. (Poway CA) Moore Shelley I. (Poway CA) Cundiff ; Sr. Raymond M. (Poway CA) Richtsmeier Brent W. (San Diego CA) Medin Todd R. (Escondido CA) Russe, Airflow system for ink-jet printer.
Hauschulz Dana S. ; Hilton Daniel E., Apparatus and methods of making and using heater apparatus for heating an object having two-dimensional or three-dimens.
Toy Lester T. (San Francisco CA) Moyer Wendell W. (Atherton CA) Lyons Bernard J. (Atherton CA) Horsma David A. (Palo Alto CA), Conductive polymer compositions, and to devices comprising such compositions.
Grice Karl R. (Abbeville SC) Bannister Jimmy L. (Belton SC) Gregory Leland M. (Belton SC) Whitfield Frank J. (Honea Path SC), Electric heating appliance.
Cunningham Donald M. (Pittsburgh PA) Bartels Mark A. (Columbus MS) Markum T. Randall (Vernon AL), Electric immersion heating element assembly for use with a plastic water heater tank.
Zhao Zhi-Rong (5F ; No. 18-1 ; Lane 143 ; Hang Chue South Road Sec. 1 Taipei TWX), Electrically heated garment with oscillator control for heating element.
Shinohara Makoto (Crystal Lake IL) Miyashiro James J. (Woodstock IL), Epoxy resinous molding compositions having low coefficient of thermal expansion and high thermal conductivity.
Karos Gus (Mayfield Heights OH) Karos Nick (Pepper Pike OH) Weimer Ralph E. (Wheaton IL) Sloan Norman R. (New Lenox IL) Miller Dye O. (Barrington IL), Equipment for holding or staging packaged sandwiches.
Murphy Robert A. (Franklin TN) Syler Rodney R. (Franklin TN) Slattery William H. (Spring Hill TN), Fluid heater utilizing dual heating elements interconnected with conductive jumper.
Lock William L. (North Webster IN) DuBois Dennis L. (North Webster IN), Heating device for a volatile material with resistive film formed on a substrate and overmolded body.
Schwiebert William H. (Cardiff CA) Hall Corrina A. E. (Blodgett OR) Broder Damon W. (Austin TX) Moore Shelley I. (San Diego CA), Method and apparatus for heating print medium in an ink-jet printer.
Batliwalla Neville S. (Foster City CA) Dharia Amitkumar N. (Newark CA) Feldman Randall M. (Redwood City CA) Mehan Ashok K. (Union City CA), Method of making an electrical device comprising a conductive polymer.
Moseley Jennifer D. ; Little John C. ; Narramore Richard W. ; Main Charles A. ; Berens ; Jr. Alan Paul, Microwave popcorn bag with continuous susceptor arrangement.
Firl Gerold G. (Poway CA) Giles Robert R. (Escondido CA) Goss Steven M. (Vancouver WA) Kaplan Ronald J. (San Marcas CA), Multi-purpose paper path component for ink-jet printer.
Rezabek Dennis J. (Kirtland OH) Walty Robert J. (Encinitas CA), Panel heater assembly for use in a corrosive environment and method of manufacturing the heater.
Spehrley ; Jr. Charles W. (Hartford VT) Creagh Linda T. (West Lebanon NH) Schaffer Robert R. (Canaan NH), Platen arrangement for hot melt ink jet apparatus.
Rise James D. (Lake Oswego OR) Pong William Y. (Tualatin OR) Crawford Timothy L. (Tigard OR) Neal Meade (Mulino OR) Hindman Larry E. (Woodburn OR) Urban Carl T. (Lake Oswego OR), Printer media preheater and method.
Horsma David A. (Palo Alto CA) Hammack Teddy J. (Los Altos CA), Self regulating heating device employing positive temperature coefficient of resistance compositions.
Vogel Alan D. (Laurel MD) Snyder Fred E. (Princeton NJ), Terminal block for single phase or three phase wiring of an immersion heater assembly and methods of wiring.
Milkovits Joseph P. (San Diego CA) Maurer Craig A. (Oceanside CA), Thin, shallow-angle serrated hold-down with improved warming, for better ink control in a liquid-ink printer.
Owens George G. (1220 Highway 3033 West Monroe LA 71292) Brinson Ernest D. (Rt. 1 Box 148 Portland AR 71663), Two stage thermostatically controlled electric water heating tank.
Kunnecke Walter (Binningen CHX) Amacher Urs (Aeschi CHX) Meier Max (Luterkofen CHX), Weldable connecting member for connecting or joining thermoplastic pipe elements.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.