Ratchet screw driver

Details Ratchet screw driver Ratchet screw driver

1999-06-01

2000-11-21

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 60, 81438, B25B 1346

Patent

active

061486965

ABSTRACT:
A ratchet screw driver includes a barrel having a stud en gaged into a handle and having a pair of opposite passages for slidably receiving a pair of pawls. A gear is rotatably received in the barrel and has an aperture for receiving various kinds of driving stems. A spring is engaged on the barrel and has two end beads engaged with the pawls for biasing the pawls to engage with the gear. The barrel includes a curved slot for receiving an actuator which is engaged into the curved slot of the barrel and located between the pawls for moving the pawls against the spring.

REFERENCES:
patent: 1961246 (1934-06-01), Powers
patent: 2158728 (1939-05-01), Peters
patent: 2527492 (1950-10-01), Cleary et al.
patent: 4776246 (1988-10-01), Elliston
patent: 5570616 (1996-11-01), Thompson et al.
patent: 5573093 (1996-11-01), Lee
patent: 5651294 (1997-07-01), Shiao
patent: 5687820 (1997-11-01), Lin
patent: 5732606 (1998-03-01), Chiang
patent: 5894765 (1999-04-01), Anderson et al.
patent: 5901622 (1999-05-01), Sweeny
patent: 5974915 (1999-11-01), Chou
patent: 6047617 (2000-04-01), Chen

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