Line filter assembly
Patent 5227745 Issued on July 13, 1993. Estimated Expiration Date: 
April 30, 2012. 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.
April 30, 2012. 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 ReferencesNoise suppression inductor Common-mode choking coil Line filter assembly Patent #: 5155457 InventorsAssigneeApplicationNo. 876341 filed on 04/30/1992US Classes:333/177, Transformer coupled333/167, Frequency domain filters utilizing only lumped parameters333/176, Including specific frequency rejection means336/69, WITH COIL CAPACITANCE MODIFYING MEANS336/185, Coil supports or spacers336/210WITH CORE CLAMPS, WEDGES OR FASTENERSExaminersPrimary: Pascal, RobertAssistant: Neyzari, Ali Attorney, Agent or FirmInternational ClassH03H 007/00Foreign Application Priority Data1990-06-18 JPAbstractA line filter assembly adapted to be inserted in an electrical power supply circuit of various electronic appliances for avoiding an invasion and leakage of noise include first and second core members each having a pair of opposite arms connected together through a common bridge. Coils are formed on the arms of each of the core members in such a manner that directions of magnetic fluxes produced in the closed magnetic circuit as a result of flow of line currents counteract while the same coils are so arranged that the magnetic fluxes produced in the closed magnetic circuit as a result of the flow of the line currents are oriented in the same direction.Field of SearchTransformer coupledIncluding specific frequency rejection means Frequency domain filters utilizing only lumped parameters Resonant, discrete frequency selective type With variable coupling means Including bandwidth adjusting, shaping, or stabilization means Two windings (e.g., transformer) Coils having different axis or on different core legs WITH CORE CLAMPS, WEDGES OR FASTENERS Coil supports or spacers Preformed insulation between coil and core (e.g., spool) WINDING WITH TERMINALS, TAPS, OR COIL CONDUCTOR END ANCHORING MEANS WINDING FORMED OF PLURAL COILS (SERIES OR PARALLEL) Coil on a preformed suport or mount WITH COIL CAPACITANCE MODIFYING MEANS Wound to reduce external magnetic field (i.e., fieldless winding) | |
