Patents by Inventor Stewart W. Smith

Stewart W. Smith 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).

  • Constant tension device for filter bag
    Patent number: 4400186
    Abstract: A constant tension device is provided for use with a filter bag. The device includes a spring and a linkage assembly for applying tension to the filter bag. The linkage assembly is designed such that a substantially constant tension is applied to the bag regardless of the force exerted by the spring. A pair of lever arms is included within the linkage assembly for applying pressure to a bag cap if the device is used within the filter bag.
    Type: Grant
    Filed: September 17, 1981
    Date of Patent: August 23, 1983
    Assignee: Albany International Corporation
    Inventors: Carl V. Leunig, Stewart W. Smith