Patents by Inventor Herwig Pflug

Herwig Pflug 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).

  • Sealing ring
    Patent number: 5997008
    Abstract: A sealing ring, for use in establishing a fluid-tight connection between the facing ends of tubular members which are to be braced axially with respect to one another, comprises a thin sheet-metal ring provided with a corrugation which defines an effective sealing ring thickness greatly in excess of the thickness of the sheet-metal. The sealing ring is provided with a non-metallic coating on both sides, the coating on at least one side being a layer which functions to achieve microsealing.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: December 7, 1999
    Assignee: Klinger AG
    Inventor: Herwig Pflug
  • Lenticular sealing ring with alternating graphite and metal lamellae
    Patent number: 5671929
    Abstract: A lenticular sealing ring comprises alternately arranged lamellae (1) made of expanded graphite and metal lamellae (2). The density of the graphite lamellae (1) increases from the inside toward the outside of the sealing ring. The layering is configured so that on both sides of the lenticular surfaces at least half of the curved surface is covered by a continuous graphite lamella (1') and a plurality of encircling metal and graphite lamellae (1, 2) terminated in the outer edge region.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 30, 1997
    Assignee: Klinger AG
    Inventor: Herwig Pflug