Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Patent
1980-06-11
1982-09-14
Schroeder, Werner H.
Tool driving or impacting
Drive adjustable to completely change kind of drive
Adjustable to impacting device
B25D 1112
Patent
active
043490743
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.
REFERENCES:
patent: 3114423 (1963-12-01), Naslund
patent: 3791461 (1974-02-01), Rosselet
patent: 4114699 (1978-09-01), Wolf
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4232749 (1980-11-01), Rohrbach
Falik Andrew M.
Kango Electric Hammers Limited
Schroeder Werner H.
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