Patents by Inventor Christopher William Fotherby

Christopher William Fotherby has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8779716
    Abstract: The present invention relates to a multi output inverter that is adapted to supply mains powered appliances 47-49 and/or poly-phase motors 50, 51.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: July 15, 2014
    Assignee: Power Concepts NZ Limited
    Inventor: Christopher William Fotherby
  • Publication number: 20130241444
    Abstract: The present invention relates to a multi output inverter that is adapted to supply mains powered appliances 47-49 and/or poly-phase motors 50, 51. The inverter is also adapted to reduce ripple current.
    Type: Application
    Filed: May 1, 2013
    Publication date: September 19, 2013
    Inventor: Christopher William Fotherby
  • Patent number: 8526206
    Abstract: The present invention relates to a DC to AC inverter comprising a plurality of voltage controlled switching devices, where one or more of the voltage controlled switching devices is driven by a drive circuit comprising: a bridge switching circuit (59), a transformer (28) with a primary winding (29) and a secondary-winding (30), a transition selection circuit (60) coupled to a control terminal of a respective voltage controlled switching device (40) of the inverter, at least one inductance (37) that forms at least one resonant circuit with the input capacitance (41) of the control terminal, wherein the bridge switching circuit (59) can be operated to generate drive pulses via the selection circuit (60) to operate the respective voltage controlled switching device (40).
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: September 3, 2013
    Assignee: Power Concepts NZ Limited
    Inventor: Christopher William Fotherby
  • Patent number: 8456128
    Abstract: The present invention relates to a multi output inverter that is adapted to supply mains powered appliances (47-49) and/or poly-phase motors (50, 51). The inverter is also adapted to reduce ripple current.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: June 4, 2013
    Assignee: Power Concepts NZ Limited
    Inventor: Christopher William Fotherby
  • Patent number: 8351216
    Abstract: The present invention relates to a layered structure assembly (1) for a DC to AC inverter comprising: a first layered structure (10) with first (12) and second (13) conductive layers, a second layered structure (14) with third (16) and fourth (17) conductive layers, and at least one connector (21) providing a low resistance/inductance interconnection between layered structures (10, 14), the connecter (21) comprising a rod (23) inside a sleeve (26).
    Type: Grant
    Filed: June 10, 2008
    Date of Patent: January 8, 2013
    Assignee: Power Concepts NZ Limited
    Inventor: Christopher William Fotherby
  • Publication number: 20110019454
    Abstract: The present invention relates to a DC to AC inverter comprising a plurality of voltage controlled switching devices, where one or more of the voltage controlled switching devices is driven by a drive circuit comprising: a bridge switching circuit (59), a transformer (28) with a primary winding (29) and a secondary-winding (30), a transition selection circuit (60) coupled to a control terminal of a respective voltage controlled switching device (40) of the inverter, at least one inductance (37) that forms at least one resonant circuit with the input capacitance (41) of the control terminal, wherein the bridge switching circuit (59) can be operated to generate drive pulses via the selection circuit (60) to operate the respective voltage controlled switching device (40).
    Type: Application
    Filed: December 20, 2007
    Publication date: January 27, 2011
    Inventor: Christopher William Fotherby
  • Publication number: 20100320949
    Abstract: The present invention relates to a multi output inverter that is adapted to supply mains powered appliances (47-49) and/or poly-phase motors (50, 51). The inverter is also adapted to reduce ripple current.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 23, 2010
    Inventor: Christopher William Fotherby
  • Publication number: 20100195301
    Abstract: The present invention relates to a layered structure assembly (1) for a DC to AC inverter comprising: a first layered structure (10) with first (12) and second (13) conductive layers, a second layered structure (14) with third (16) and fourth (17) conductive layers, and at least one connector (21) providing a low resistance/inductance interconnection between layered structures (10, 14), the connecter (21) comprising a rod (23) inside a sleeve (26).
    Type: Application
    Filed: June 10, 2008
    Publication date: August 5, 2010
    Inventor: Christopher William Fotherby