Patents by Inventor Robert P. Redner

Robert P. Redner 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).

  • Air filter gauge
    Patent number: 6190442
    Abstract: An air filter cleanness gauge is provided. The gauge in a preferred embodiment includes a transparent cover. The housing has a first opening for fluid communication with the atmosphere and a second opening having fluid communication with a fluid source exposed to a filter. A vane is pivotally connected within the housing and provides a pressure boundary between the first and second openings. Movement of the vane indicates a change in pressure differential between the atmosphere and the fluid source, thereby indicating a need to change the air filter.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: February 20, 2001
    Assignee: Tishken Products Co.
    Inventor: Robert P. Redner