Patents Assigned to Tracto-Technik Paul Schmidt Speczialmashinen KG
  • Percussion boring machine
    Patent number: 5558167
    Abstract: A percussion boring machine having an impact piston axially movable in a housing, a control pipe connected to a compressed air hose and an elastic separator fitted between the housing and the control pipe and held under axial compression, whereby assembly of the separator is simplified. In addition the housing, control pipe and compressed air hose suffer less damage, and the control pipe can be assembled and disassembled more easily.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: September 24, 1996
    Assignee: Tracto-Technik Paul Schmidt Speczialmashinen KG
    Inventor: Alfons Hesse