Patents by Inventor Otto G. Crass

Otto G. Crass 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 measurement of valve stem thrust
    Patent number: 4570903
    Abstract: A method and apparatus for directly measuring the thrust present on a valve stem wherein a valve actuator is operated to actuate a valve and to automatically shut off when a predetermined actuator condition is attained, the invention, including a tension load cell supported for coupling to the valve stem to provide a measurement of the thrust present on the externally accessible end of the valve stem to provide a valve stem thrust reading directly without the need to disassemble the valve, or actuator assembly, with minimal hardware requirements, and at low cost.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: February 18, 1986
    Inventor: Otto G. Crass