Ratchet screwdriver

Details Ratchet screwdriver Ratchet screwdriver

1988-12-20

1990-04-17

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

192 84PM, 192107M, 74575, 74578, B25B 1300

Patent

active

049169882

ABSTRACT:
A ratchet screwdriver contains a magnetic clutch assembly which is accessible by external switching means. The switching means can alternately switch the clutch assembly from a first position to a second position and vice-versa. When the clutch assembly is in the first position the handle will be in a fixed relationship with the shaft and head when the handle is turned in a clockwise direction but will rotate relative to the shaft and head when the handle is turned in a counterclockwise direction. ALternatively, when the clutch assembly is in the second position, the handle will be in a fixed position relative to the shaft and head when the handle is turned in a counterclockwise direction but will rotate relative to the shaft and head when the handle is turned in a clockwise direction. Previous ratchet drivers do not operate smoothly or they are much too complex.

REFERENCES:
patent: 4485699 (1984-12-01), Fuller

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