Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1998-12-31
2000-06-06
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
8 632, B25B 1346
Patent
active
060705027
ABSTRACT:
A ratchet box wrench includes a frame having two chambers at two ends, a packing member fitted in an intermediate portion of a frame and having two recesses at two ends, a first lug mounted in one of said chambers and provided with a pin at a top thereof, a second lug mounted in another one of said chambers and provided with a pin at a bottom thereof, a pair of outer plates fastened on two sides of said packing member, a pair of switching members each having an elongated portion at an end at an end having a longitudinal open slit at an intermediate portion, two ratchet box installed in said two chambers, a pair of pawls each rotatably mounted on one of said outer plates and disposed in one of said chambers, and a pair of springs each having a circular loop adapted to engage with said pin of one of said first and second lugs, a side loop engaged with a hook of said switching member, and a leg fitted in said cavity of one of said pawls, and two buttons each engaged with said raised portion of a respective one of said switching members.
REFERENCES:
patent: 1635102 (1927-07-01), Watson
patent: 4748875 (1988-06-01), Lang
patent: 5144869 (1992-09-01), Chow
patent: 5582080 (1996-12-01), Barmore
patent: 5603247 (1997-02-01), Wei
Smith James G.
Thomas David B.
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