Patents by Inventor Franz Grof

Franz Grof 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).

  • Disposable filter unit with filter support means at both sides of the filter element
    Patent number: 4874513
    Abstract: A disposable filter unit (1) comprises a two-part fluid-tight and pressure-resistant housing with funnel-shaped inlet and outlet connecting sleeves (3,20). Two filter supports (5,12) are fixed in a fluid-tight and form-locking manner within the housing, and the filter element fixed between the supports. The filter supports (5,12) are essentially circular grate-shaped plates including concentrically arranged coplanar circular webs (16) defining concentrically arranged circular gaps (19) therebetween and a centrally arranged baffle plate (17). The webs and plate are fixed at their back side, facing away from the filter element, with radially extending support webs (18).
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: October 17, 1989
    Assignee: Schleicher & Schuell GmbH
    Inventors: Asok Chakraborty, Herbert Urlaub, Franz Grof, Klaus Cosack