Ratchet transmission control mechanism of a screwdriver

Details Ratchet transmission control mechanism of a screwdriver Ratchet transmission control mechanism of a screwdriver

1995-10-06

1996-11-12

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Automatic

192 46, 192 47, 81 631, B25B 1504, F16D 4118

Patent

active

055730930

ABSTRACT:
A ratchet transmission control mechanism which includes a casing having a head at one end, toothed shaft inserted into an axial center hole on the head to hold a bit for turning screws, two stop blocks mounted in a respective slot on the head of the casing and retained in place by a clamp for engagement with the toothed portion of the toothed shaft, an adjusting cap mounted around the toothed shaft over the head of the casing and retained in place by a locating ring, whereby when the adjusting cap is turned to the middle position, the two stop blocks are forced into engagement with the toothed portion of the shaft, for permitting the shaft to be turned by the casing in both ways; when the adjusting cap is turned to the leftward position or the rightward position, only one stop block is forced into engagement with the toothed portion of the shaft, and the shaft can only be turned by the casing in one direction.

REFERENCES:
patent: 2395681 (1946-02-01), Odlum et al.
patent: 2565961 (1951-08-01), Godfrey
patent: 2649176 (1953-08-01), Winger
patent: 4735120 (1988-04-01), Beugelsdyk

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