Ratchet mechanism for screwdrivers and the like

Details Ratchet mechanism for screwdrivers and the like Ratchet mechanism for screwdrivers and the like

1997-01-13

1998-11-17

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Automatic

81 631, B25B 1504, F16D 4108

Patent

active

058364307

ABSTRACT:
The ratchet mechanism has a body which is secured to the tool's handle, and an output shaft which extends axially from the distal end of the body. The output shaft has a splined portion which is secured rotatably within a generally cylindrical axial cavity in the distal end of the body. Two pins are mounted to project through the body of the mechanism, on a rocker for example. Depending on the position of the rocker, one or the other or both of the pins extend(s) into the splines. The pins are configured such that one permits rotation of the splined portion in one direction and prevents rotation in the opposite direction, and the other pin permits rotation in the opposite direction and prevents rotation in the first direction. There are thus three operating positions, namely "left", "right" and "locked".

REFERENCES:
patent: 309902 (1884-12-01), Watson
patent: 968080 (1910-08-01), Repass
patent: 1421792 (1922-07-01), Linden
patent: 5582081 (1996-12-01), Lin

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