Patents Assigned to Tracto-Technik Paul Schmidt Maschinenfabrik GmbH
  • Ram boring machine with impact blade piston
    Patent number: 4732222
    Abstract: In a ram boring machine for laying pipelines without trenching, a double blade that is axially moveable against a compression spring is housed in an impact tip and projects through slots in the impact tip. The double blade is struck by a striker piston and moves, during the breaking-up of an old pipe laid in the ground, substantially independently of the ram boring machine or of its housing. In this way substantially all the impact energy of the piston is used for the benefit of the breaking-up operation.
    Type: Grant
    Filed: September 23, 1986
    Date of Patent: March 22, 1988
    Assignee: Tracto-Technik Paul Schmidt Maschinenfabrik GmbH
    Inventor: Paul Schmidt