The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1994
Filed:
Jan. 22, 1992
Michael F Bruni, Hermosa Beach, CA (US);
Gerald A Cox, Playa Del Rey, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A hand-held inductive charger having concentric windings for transferring electrical power across a dielectric medium using magnetic induction. The charger comprises a removable primary coil assembly having a housing with a primary core disposed therein, and a primary winding protruding from the primary core. An electrical cable coupled to the primary winding that is adapted to couple power thereto from a power source. A secondary coil assembly having a receptacle housing is also provided, and a secondary core is disposed in the receptacle housing, and first and second concentric secondary windings are disposed in the secondary core. The first and second concentric secondary windings are coupled to a battery of an automobile. The first and second concentric secondary windings have a gap therebetween that is adapted to receive the primary winding therein. The primary and secondary coil assemblies form a transformer when their respective windings are mated. The charger allows an electric vehicle to be charged safely without any type of conventional electrical plug. The charger thus provides a safe, convenient and weatherproof mechanism for coupling power from a voltage source to an electric vehicle to recharge its propulsion battery. Approximately 6000 watts has been transferred through an embodiment of the charger having a volume of 25.8 cubic inches, yielding a power density of 230 Watts/cubic inch.