Patents by Inventor Erwin Dunz

Erwin Dunz 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 of securing tubular bellows to a cylinder
    Patent number: 3938237
    Abstract: A yieldably resilient, tubular bellows is fastened to a metal cylinder by first inserting an axial end portion of the bellows in a more rigid clamping ring whose internal cross section is greater than the cross section of the cylinder, but not substantially greater than that of the outer cross section of the bellows, then axially juxtaposing the bellows and the cylinder, and exerting axial pressure in opposite directions on the ring and the cylinder while preventing the bellows from moving out of the ring until an axially terminal portion of the cylinder enters the bore of the bellows, smaller in cross section than the cylinder, and is axially coextensive with the ring, whereby the bellows is radially compressed between the ring and the cylinder.
    Type: Grant
    Filed: July 17, 1974
    Date of Patent: February 17, 1976
    Assignee: Fichtel & Sachs AG
    Inventor: Erwin Dunz