Patents by Inventor Pieter Barendsen

Pieter Barendsen 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: 4834580
    Abstract: Method and device for driving a tunnel by means of a tunneling machine (10). At the same time as the tunnel is driven, an injection hole (91) is drilled in front of the tunnel front (90) by a rock drilling machine (53) placed behind the tunneling machine.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: May 30, 1989
    Assignee: Atlas Copco Aktiebolag
    Inventors: Pieter Barendsen, Bo O. R. Arnegard
  • Patent number: 4223748
    Abstract: In a dust collecting suction system for a rock drilling apparatus, the air rushing out of the borehole is collected in a hood and sucked through a coarse dust separator and a filter unit. The coarse dust from the separator is cleaned by an air currrent to remove remaining fine particles and then it is dumped on the ground whereas the finer dust from the filter unit is collected in plastic bags.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: September 23, 1980
    Assignee: Atlas Copco Aktiebolag
    Inventor: Pieter Barendsen