Patents by Inventor Goergan Rydgren

Goergan Rydgren 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 the control and independent monitoring of an extremely small gas flow
    Patent number: 5471977
    Abstract: A method and apparatus for independent monitoring of a flow-through quantity and, potentially, of a concentration of a gas flow that is extremely small in comparison to a respiratory gas flow is provided. The valve for the control of this small gas flow can not be controlled via the overall gas flow. In order to be able to simply and reliably monitor the flow-through quantity and the concentration of this small gas flow without a gas analyzer and independently of gas flow regulators that are usually present, it is provided that the small gas flow be separately measured and compared to a value derived from the respiratory gas flow. Given the presence of prescribable criteria, an alarm is triggered and the flow-through quantity of the small gas flow is, for example, interrupted.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: December 5, 1995
    Assignee: Siemens Aktiengesellschaft
    Inventors: Sven-Gunnar Olsson, Goergan Rydgren, Anders Larsson