Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent
1979-02-21
1981-11-17
Mackey, Robert
Tool driving or impacting
Automatic control of power operated means
Tool advance causing or controlling means
81 5722, 91 59, 92 33, 92136, B25B 23145
Patent
active
043006418
ABSTRACT:
A rotary power driver is provided which drives with a two-stage torque and speed control, wherein the initial driving is done at higher speed and lower torque, and a subsequent higher torque is automatically imposed with lower speed. The second stage is a selected pre-set stage, with provision for the selected torque built into the driver. The second stage is imposed on the drive shaft by a one-way clutch or ratchet drive.
REFERENCES:
patent: 3438451 (1969-04-01), Hayes, Jr.
patent: 3897834 (1975-08-01), Swopsher et al.
DEMAG Aktiengesellschaft
Mackey Robert
LandOfFree
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