Patents Represented by Attorney Holtz Frishauf

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  • Method of collecting dust during rock drilling and a dust collecting suction system for a rock drilling apparatus
    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