Cordless electric hair-dryer
Patent 5195253 Issued on March 23, 1993. Estimated Expiration Date: 
June 11, 2011. 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.
June 11, 2011. 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 ReferencesInduction charging system Reversable shaft with rotary and selective oscillating motion Portable cordless electric hair dressing appliance utilizing stored heat Electric hairdryer having a cage-shaped heater element Patent #: 4767914 InventorsAssigneeApplicationNo. 713305 filed on 06/11/1991US Classes:34/97, With gas or vapor flow for contact392/382, With support392/385Pistol-grip typeExaminersPrimary: Hepperle, Stephen M.Attorney, Agent or FirmForeign Patent References
International ClassA24D 020/10Foreign Application Priority Data1990-06-12 FRAbstractA cordless electric hair dryer and stand are provided in which the portable hair dryer unit has a rechargeable battery and a thermal heat reservoir. The fan blows ambient air over the thermal reservoir in heat exchange relationship to expel hot air from the dryer when in use. The stand has an electrical circuit inductivley coupled through a coil in the base of the stand to a coil in the rear of the housing of the dryer which provides power to charge the rechargeable battery in the handle of the dryer and to heat the thermal storage medium in the dryer. The heating is accomplished by resistors mounted in heat exchange relationship with the thermal reservoir material. The rechargeable battery is used only to run the fan during drying operation of the portable unit. | |
