Patents by Inventor Karl Widmann

Karl Widmann 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).

  • Patent number: 3990289
    Abstract: Apparatus for stripping articles from a press ram including a plurality of individual strippers supported in ring members surrounding the press ram. Each of the strippers is formed as a rigid member having an operating piston and a stripping piston rigidly joined together by a web section with the pistons extending parallel to and laterally spaced from one another. The operating pistons of the respective strippers are rotatably supported in bores provided in a first support ring and the operating pistons are guidably supported in radial slots at a second support ring. The two rings are rotatably moved with respect to one another by way of a piston-cylinder unit, with relative rotation of the rings effecting a forced rotation of the strippers about the operating pistons into and out of respective stripping positions adjacent the press ram.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: November 9, 1976
    Assignee: L. Schuler GmbH
    Inventors: Karl Widmann, Karl Zwerina
  • Patent number: 3935724
    Abstract: Apparatus for stripping hollow articles off of a press ram including a stripper supporting ring extending circumferentially around the press ram, a plurality of segments mounted on said supporting ring for limited radial displacement with respect to the press ram axis, and a plurality of individual hydraulically cushioned strippers mounted in each of said segments for direct engagement with the article to be stripped from the press ram. Various preferred embodiments include various mechanisms for permitting and/or positively providing radial displacement of the segments so as to accommodate passage of the press ram and article to be stripped. Several of these preferred embodiments include biasing means such as springs and/or pressure medium forces for biasing the segments radially inwardly and chamfered conical beveled edges on the segments for accommodating an outward biasing force application by way of the article and press ram.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: February 3, 1976
    Assignee: L. Schuler GmbH
    Inventors: Kurt Finsterwalder, Karl-Heinz Philipp, Martin Veil, Karl Widmann, Karl Zwerina