Patents by Inventor Hans-Otto Hoffler

Hans-Otto Hoffler 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: 4733811
    Abstract: A machine is disclosed for feeding button parts from a magazine to an attachment position. The machine includes an arcuate sliding surface which guides the button parts to the attachment position, and a transport finger which moves along the sliding surface. The transport finger is spring-urged outwardly to move the button parts in one direction, but is shiftable inwardly to pass over button parts when moved in the opposite direction.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: March 29, 1988
    Assignee: Schaeffer Scovill Verbindungstechnik GmbH
    Inventors: Herbert Birkhofer, Hans-Otto Hoffler
  • Patent number: 4273280
    Abstract: A machine for the attachment of rivets, buttons or the like on clothing pieces, with an upper tool to be moved onto the lower tool, which upper tool sits on a vertically guided tool ram with electrical drive. Two different strength magnets are coordinated to the upper tool ram, the latter being spring-biased in the reverse direction, such that the weaker electromagnet which sits in the range of a cross-sectionally-smaller step of the upper tool ram surrounds the upper tool ram in ring-like manner and the stronger electromagnet has a core which core forms a pot-shaped recess for moving a plate armature therein, the latter being arranged on the free end of the upper tool ram.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: June 16, 1981
    Assignee: Schaeffer-Homberg GmbH
    Inventors: Herbert Birkhofer, Gunther Diekhoner, Hans-Otto Hoffler