TREA

Hans-Dieter Piotrowski

Follow

Person

  • Essen, DE
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Percussion mechanism for a drill rod unit
    • Patent number 5,259,464
    • Issue date Nov 9, 1993
    • Krupp Maschinentechnik Gesellschaft mit beschrankter Haftung
    • Robert-Jan Bartels
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Dual-force hydraulic drive for a demolition tool
    • Patent number 5,199,658
    • Issue date Apr 6, 1993
    • Krupp Maschinentechnik Gesellschaft mit beschrankter Haftung
    • Robert-Jan Bartels
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulically operated striking mechanism
    • Patent number 5,129,466
    • Issue date Jul 14, 1992
    • Krupp Maschinentechnik Gesellschaft mit beschrankter Haftung
    • Robert-Jan Bartels
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
  • Information Patent Grant

    Hydraulically operated hammer drill
    • Patent number 5,117,921
    • Issue date Jun 2, 1992
    • Krupp Maschinentechnik GmbH
    • Robert-Jan Bartels
    • B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS