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US Patent 5455466 - Inductive coupling system for power and data transfer
US Patent Issued on October 3, 1995
Estimated Patent Expiration Date:
July 29, 2013Estimated 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.
Estimated Patent Expiration Date:
July 29, 2013Estimated 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.AbstractA system for inductively coupling power and data to a portable electronic device. A portable device, such as a personal digital assistant, is powered or recharged via an inductive link between the device and a support unit, thereby eliminating the need for cabling or other connections therebetween. The same inductive link is also used to transfer data signals between the device and a second electronic device, for example, a conventional desktop computer. The support unit includes a primary winding of a transformer, a power amplifier and a modulator. The portable device includes a secondary winding connected in parallel with the input of a rectifier, the output of which is connected to a battery charging circuit, and to a modem, which is further connected to the device microprocessor. Placement of the device on the support unit effects the inductive coupling when the primary and secondary windings are in proximity to one another. | InventorsAssigneeApplicationNo. 098683 filed on 07/29/1993US Classes:307/104, ELECTROMAGNET OR HIGHLY INDUCTIVE SYSTEMS340/10.34Power upField of Search307/104, ELECTROMAGNET OR HIGHLY INDUCTIVE SYSTEMS336/226, Figure "8" section336/184, Coils having different axis or on different core legs336/200, Printed circuit-type coil336/117, With core336/125, About axis normal to other coil axis336/127, Similar spherical-shaped coils336/128, Tubular stationary coil336/120, Angularly movable336/129, Movable along or parallel to other coil axis336/123, About axis parallel to or coaxial with the other coil axis336/121, Angularly and linearly movable coils336/126, Plural coils movable with respect to a coil336/124, Nonsymmetrically pivoted coil movable on axis transverse to other coil axis336/119, Coil and core movable as a unit336/122, Angularly movable323/308, With core having an air gap or magnetic shunt323/331, With core having a gap, aperture, or slot340/825.72Wireless linkExaminersPrimary: Wong, Peter S.Assistant: Krishnan, Aditya Attorney, Agent or FirmUS Patent References4800328, Inductive power coupling with constant voltage outputIssued on: 01/24/1989 Inventor: Bolger , et al.4818855, Identification system Issued on: 04/04/1989 Inventor: Mongeon , et al.4918432, House arrest monitoring system Issued on: 04/17/1990 Inventor: Pauley, et al.5041826, Identification system Issued on: 08/20/1991 Inventor: Milheiser5229652, Non-contact data and power connector for computer based modules Issued on: 07/20/1993 Inventor: Hough5257011Data altering means for multi-memory electronic identification tag Issued on: 10/26/1993 Inventor: Beigel International ClassH04Q 001/18 |
