Patents Examined by Roy M. Prunnoose
  • Brake check handheld refractometer
    Patent number: 6034762
    Abstract: A refractometric apparatus and method for monitoring the percentage of water in hydraulic fluids employ a temperature sensitive device allowing a user to obtain accurate and correct readings of various measured properties. In particular, the temperature sensitive member comprises a prism-wedge-mirror combination in conjunction with a bimetallic strip. The combination ensures the proper angular displacement of a light beam inside the refractometric apparatus and, therefore, the correct reading of a parameter to be measured.
    Type: Grant
    Filed: January 28, 1999
    Date of Patent: March 7, 2000
    Assignee: Leica Microsystems Inc.
    Inventors: Christopher T. Cotton, Jeffrey M. Sabin, Thomas E. Ryan