Patents Assigned to Firma Dieter Haubold Industrielle Nagelgerate
  • Working process of a pneumatic operated ramming tool
    Patent number: 4173171
    Abstract: At the beginning of a working stroke of a compressed air loaded working piston disposed reciprocally in a pneumatic operated ramming tool said piston is initially set in motion under the action of minor amounts of compressed air until its top becomes immersed into stored compressed air and the working piston is then exposed to the full force of said stored compressed air to perform its working stroke. This working process permits to use a substantially simpler ramming apparatus.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: November 6, 1979
    Assignee: Firma Dieter Haubold Industrielle Nagelgerate
    Inventor: Wilfried Lange