Tool driving or impacting – Drive controlled by relative axial movement of tool – Drive motor controlled
Patent
1980-03-31
1982-11-16
Mackey, Robert
Tool driving or impacting
Drive controlled by relative axial movement of tool
Drive motor controlled
251354, B25D 1710
Patent
active
043591086
ABSTRACT:
A pneumatic hammer having a vibration attenuating hollow cylindrical member axially movable in a housing body, a striking piston axially movable within the cylindrical member, a stationary sealing sleeve engaging a portion of the outer surface of the cylindrical member, inlet air control means including an inlet passage in the wall of the cylindrical member, a slidable pressure ring cooperating with a pressure spring for urging the cylindrical member into a rest position in which the inlet air control means are disconnected from the inlet air channel and are connected instead to an outlet air channel in the housing body. Upon lifting the cylindrical member via a working tool, the passage to the outlet air channel is closed and the passage from the inlet air channel to the inlet air control means is opened and a normal operation of the hammer is initiated.
REFERENCES:
patent: 1380118 (1921-05-01), Sparrow
patent: 2899934 (1959-08-01), Salengro
Heerde Klaus
Mechelke Klaus
Radtke Gerd
Steiner Hans-Joachim
Mackey Robert
Striker Michael J.
VEB Werkzeugkombinat Schmalkalden
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