Patents by Inventor Luiz A.V. Cheim

Luiz A.V. Cheim 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: 11587727
    Abstract: The present application is directed to an electrical system including a housing configured to hold electrical components within an internal volume. In one aspect the electrical system is a power transformer. A sensor is mounted to the housing and is configured to sense a parameter associated with one or more electrical components during operation of the electrical system. A control system including a communication unit and a data processing unit is operable for analyzing the sensed parameter and comparing the sensed parameter to a predetermined minimum or maximum threshold value.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: February 21, 2023
    Assignee: HITACHI ENERGY SWITZERLAND AG
    Inventors: George Zhang, James Stoupis, Gregory F. Rossano, Xiaoming Feng, Luiz A.V. Cheim, Craig Stiegemeier
  • Publication number: 20140077072
    Abstract: Optical sensor structure senses the presence of liquid in a sealed conservator tank. The sensor structure includes a sensor head having a body with first and second opposing ends, a plurality of perforations through the body and spaced between the first and second ends, and a mirror disposed at the second end. The perforations are constructed and arranged to receive and hold fluid therein. The sensor head is constructed and arranged to rest on a surface of a bladder. The sensor structure includes a light source, a first fiber optic cable between the light source and the first end of the body, a light detector, and a second fiber optic cable between the light detector and the first end of the body. The amount of light received by the light detector is reduced when liquid, instead of air, is in at least some of the perforations in the body.
    Type: Application
    Filed: November 7, 2013
    Publication date: March 20, 2014
    Inventor: Luiz A.V. Cheim
  • Publication number: 20130016357
    Abstract: Optical sensor structure senses the presence of liquid in a sealed conservator tank. The sensor structure includes a sensor head having a body with first and second opposing ends, a plurality of perforations through the body and spaced between the first and second ends, and a mirror disposed at the second end. The perforations are constructed and arranged to receive and hold fluid therein. The sensor head is constructed and arranged to rest on a surface of a bladder. The sensor structure includes a light source, a first fiber optic cable between the light source and the first end of the body, a light detector, and a second fiber optic cable between the light detector and the first end of the body. The amount of light received by the light detector is reduced when liquid, instead of air, is in at least some of the perforations in the body.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 17, 2013
    Applicant: ABB TECHNOLOGY AG
    Inventor: Luiz A.V. Cheim