Ratchet screw driver

Details Ratchet screw driver Ratchet screw driver

1998-01-20

1999-10-19

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

81 60, B25B 1346

Patent

active

059670037

ABSTRACT:
A ratchet screw driver includes a handle having a tube and having a number of ratchet teeth and a driving stem rotatably engaged in the tube. A follower is slidably engaged on the driving stem and includes a number of ratchet teeth for engaging with the ratchet teeth of the handle. A spring may bias the ratchet teeth of the follower to engage with the ratchet teeth of the handle for allowing the driving stem to be rotated in an active direction by the handle and to be rotated freely relative to the handle when the handle is rotated in the reverse direction.

REFERENCES:
patent: 1553850 (1925-09-01), Davis
patent: 1627441 (1927-05-01), Lawyer
patent: 5782146 (1998-07-01), Lin

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