Patents by Inventor Nigel Tester

Nigel Tester 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).

  • Engine overspeed detection circuit and method
    Patent number: 9804055
    Abstract: An engine over speed detection circuit for determining an engine over speed condition is described. The circuit includes a detection unit configured to send a pulsed signal indicative of engine speed; a reactive impedance configured to discharge upon receipt of a pulse of the pulsed signal at a rate defined by the pulsed signal; a comparator unit to compare a voltage or current value of the reactive impedance with a threshold value and to output the result of the comparison at the rate of the pulsed signal.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: October 31, 2017
    Assignee: Pyroban Limited
    Inventor: Nigel Tester
  • Engine Overspeed Detection Circuit and Method
    Publication number: 20150268130
    Abstract: An engine over speed detection circuit for determining an engine over speed condition is described. The circuit includes a detection unit configured to send a pulsed signal indicative of engine speed; a reactive impedance configured to discharge upon receipt of a pulse of the pulsed signal at a rate defined by the pulsed signal; a comparator unit to compare a voltage or current value of the reactive impedance with a threshold value and to output the result of the comparison at the rate of the pulsed signal.
    Type: Application
    Filed: October 30, 2012
    Publication date: September 24, 2015
    Inventor: Nigel Tester
  • Exhaust Filter Regeneration Regime Method and Apparatus
    Publication number: 20080000219
    Abstract: An exhaust filter regeneration regime is described in which a filter is regenerated by triggering an exothermic reaction in the filter to burn off particulate load. In order to attain the appropriate regeneration temperatures fuel is injected in the exhaust stream and oxidizes upon contact with a catalytic converter. A control regime comprises metering fuel injection dependent upon exhaust stream temperature to provide a flexible control regime independent of engine duty cycle.
    Type: Application
    Filed: March 16, 2005
    Publication date: January 3, 2008
    Inventors: Ian Ratcliff, John Parker, Nigel Tester, Marco Holt, Steve Noakes