Induction heating coil
Patent 4296295 Issued on October 20, 1981. Estimated Expiration Date: 
March 25, 2000. 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.
March 25, 2000. 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 3704357 3781503 3781504 3786219 3786220 3809846 3814888 Work coil for use in an induction cooking appliance 4092511 InventorAssigneeApplicationNo. 06/133685 filed on 03/25/1980US Classes:219/624, Core or coil structure219/675, Planar coil336/232Planar typeExaminersPrimary: Mayewsky, Volodymyr Y.Attorney, Agent or FirmInternational ClassesH05B 6/36 (20060101)H05B 6/12 (20060101) Foreign Application Priority Data1979-04-04 JPAbstractAn improved flat induction heating coil for a cooking apparatus of the type in which an electrically conductive cooking utensil is heated according to the principle of electromagnetic induction. To provide a substantially uniform magnetic flux density distribution in the induction coil constituting a part of the cooking apparatus and, hence, a uniform temperature distribution across the bottom of the cooking utensil, a refractory insulating material is wound adjacent inner turns of the coil to provide a comparatively larger winding pitch for said inner turns than for outer turns. This arrangement makes for a flattened temperature profile and eliminates an uneven cooking of food. | |
