Induction charging system
Patent 3938018 Issued on February 10, 1976. Estimated Expiration Date: 
February 10, 1993. 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.
February 10, 1993. 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 1982689 3253596 3277358 3418552 3454012 3652915 3673485 InventorApplicationNo. 506530 filed on 09/16/1974US Classes:320/140, With DC-DC converter (e.g., flyback supply, etc.)320/139, Pulsed336/225COILS OF SPECIAL CONFIGURATIONExaminersPrimary: Miller, J. D.Assistant: Hickey, Robert J. Attorney, Agent or FirmAbstractA normal 117-volt, 60 cycle source is converted into a high frequency signal resulting in radiation of a substantial portion of the energy in the signal. A receiving coil is inductively coupled to the radiation over a given distance substantially less than a wave length of the high frequency signal to provide a received signal without the necessity of any electrical wires. The received signal in turn is converted into a D.C. signal and passed to a rechargeable battery for charging. The inductive coupling can be utilized for recharging portable electrical instruments having rechargeable batteries or for charging larger rechargeable batteries such as used in electrically driven vehicles. | |
