Patents by Inventor Ernst Bachmann

Ernst Bachmann 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).

  • Process and apparatus for producing at least two forgings on a hot-forming press
    Patent number: 4590780
    Abstract: Starting from a pre-heated bar, there is sheared-off first a portion (41) which, in a first forming stage of the machine, is formed into a tier shaped pressed article. In the second forming stage, the pressed article is further formed so that it has an inner ring (J), an outer ring (A) arranged co-axially to this and a radial annular web (S) connecting the two rings (J,A). The sheared-off outer ring (44) is therefore ejected in the next to last stage, while in the last working stage the inner ring (45) separated from the outer ring is subjected to further working. This last working stage involves stamping out a waste piece (35) and shearing-off an annular web (38). It is also possible to carry out a forming operation in this last working stage to upset the remaining inner ring (22a).
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: May 27, 1986
    Assignee: Hatebur Umformmaschinen AG
    Inventor: Ernst Bachmann