Induction heating coil
Patent 4453067 Issued on June 5, 1984. Estimated Expiration Date: 
January 11, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 11, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2452197 2751480 3275784 3632948 3819903 3843857 Work coil for use in an induction cooking appliance Induction heating coil Patent #: 4296295 InventorsApplicationNo. 06/338667 filed on 01/11/1982US Classes:219/624, Core or coil structure219/622, With support219/675, Planar coil336/205, Coil turns cemented to support or embedded in plastic336/232Planar typeExaminersPrimary: Shaw, C. C.Assistant: Leung, Philip H. Attorney, Agent or FirmInternational ClassesH05B 6/06 (20060101)H05B 6/12 (20060101) AbstractAn induction heating coil for use in a cooking range or the like. The coil is defined by a flat spiral of electrically conducted wire having at least three radially related sections including a radially outermost section having closely spaced turns, a radially innermost section having closely spaced turns, and a radially intermediate section having widely spaced turns. In one form, the intermediate section turns are uniformly widely spaced. In another form, the intermediate section turns are arranged in widely spaced groups. The disclosed configurations provide a substantially uniform power transfer to the element being heated, such as a ferromagnetic utensil. | |
