Patents by Inventor Daniel De Frutos

Daniel De Frutos 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).

  • Monitoring of the wear of sliding electrical contacts and its application to the state-dependent and/or predictive maintenance of a device having sliding electrical contacts
    Patent number: 6034531
    Abstract: The method of monitoring the wear of at least one sliding electrical contact of a brush, sliding over a track which can move with respect to the brush, comprises the measurement of the electrical resistance of this contact, the delivery of an image signal corresponding to this resistance, the following of its variations, the construction of a reference signal indicative of a state of wear of the contact, the comparison of the image signal with the reference signal and the derivation of a signal, resulting from this comparison, corresponding to the state of wear of the contact. The resistance is measured by the ratio of the variations in the voltage across the terminals of the contact to the variations in the current flowing through this contact.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: March 7, 2000
    Assignee: Eurocopter
    Inventors: Jean-Paul Senglat, Daniel De Frutos