Tool driving or impacting – Impacting devices – With anvil arranged to transmit torsional impact to tool
Patent
1991-04-24
1993-04-06
Watts, Douglas D.
Tool driving or impacting
Impacting devices
With anvil arranged to transmit torsional impact to tool
B25B 2102
Patent
active
051995050
ABSTRACT:
A rotary impact tool including a generally tubular cage rotated by a motor about a central longitudinal axis of the cage. The cage has an internal wall with axially extending guide channels formed in it for receiving hammer pins capable of moving axially in the guide channels. The hammer pins have a generally flat striking surface. An output shaft mounted generally coaxially with the cage for rotation relative to the cage has radially outwardly projecting anvils having generally flat impact surfaces. A clutch mechanism intermittently moves the hammer pins to an extended position in which the striking surfaces of the hammer pins are in registration with the impact surfaces of the anvils. The striking surfaces of the hammer pins strike the impact surfaces of the anvils upon further rotation of the cage for delivering an impact to the output shaft, and then withdrawn by the clutch mechanism to regain momentum.
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Shinano Pneumatic Industries Inc.
Smith Scott A.
Watts Douglas D.
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