Patents by Inventor Calvin H. Cox

Calvin H. Cox 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).

  • Method and apparatus for detecting the rotational speed of a rotary member
    Patent number: 8205503
    Abstract: The speed of rotation of a rotary member such as a compressor or turbine wheel of a turbocharger is determined by directing an ultrasonic signal into a blade cavity and receiving the reflected signal, which is amplitude modulated by virtue of the passage of the blades across the ultrasonic transducer. The received signal is demodulated to determine the frequency of amplitude modulation of the received signal caused by passage of blades between the first and second locations. This enables the speed of rotation to be calculated. The performance of the turbocharger can thus be optimised in the context of the overall engine system via an engine control module.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: June 26, 2012
    Assignee: Cummins Turbo Technologies Limited
    Inventor: Calvin H. Cox
  • METHOD AND APPARATUS FOR DETECTING THE ROTATIONAL SPEED OF A ROTARY MEMBER
    Publication number: 20100011868
    Abstract: The speed of rotation of a rotary member such as a compressor or turbine wheel of a turbocharger is determined by directing an ultrasonic signal into a blade cavity and receiving the reflected signal, which is amplitude modulated by virtue of the passage of the blades across the ultrasonic transducer. The received signal is demodulated to determine the frequency of amplitude modulation of the received signal caused by passage of blades between the first and second locations. This enables the speed of rotation to be calculated. The performance of the turbocharger can thus be optimised in the context of the overall engine system via an engine control module.
    Type: Application
    Filed: January 4, 2008
    Publication date: January 21, 2010
    Inventor: Calvin H. Cox