Convertible rotary impact hammer drill
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 14, 1982
Grant Date -
N/A
app pub date -
Jun 11, 1980
filing date -
Jun 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a rotary hammer drill in which a tool is driven in rotation by rotating the cylinder housing a driver piston and a striker, the hammering effect is rendered inoperative by providing in the well of the barrel an aperture which is axially positioned so as to vent the space between the driver and striker to the atmosphere. A sleeve is mounted on the external surface of the barrel and is axially movable to blank off the aperture or to place it in communication with the ambient atmosphere.
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Family
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Cited Art Landscape
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