Adjustable extension wrench for ratchet drive

Details Adjustable extension wrench for ratchet drive Adjustable extension wrench for ratchet drive

1989-08-10

1991-11-26

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Pivoted side jaw

81186, 279107, B25B 1332

Patent

active

050673769

ABSTRACT:
An adjustable wrench has a drive shaft adapted to be turned by a conventional ratchet wrench. A housing is mounted on the output end of the shaft and three equidistantly spaced jaws are mounted between the shaft and surrounding housing. Cam surfaces are on the jaws and inside of the housing so that housing rotation in one direction will open the jaws and in the other direction will close them. A ratchet mechanism connects the shaft to the housing.

REFERENCES:
patent: 346310 (1886-07-01), O'Neill
patent: 581427 (1897-04-01), Olson
patent: 877773 (1908-01-01), Holm
patent: 1243300 (1917-10-01), Jacoby
patent: 1291421 (1919-01-01), Coulter
patent: 1410080 (1922-03-01), Schwahlen
patent: 1450641 (1923-04-01), Ograbisz
patent: 1844616 (1932-02-01), Whiton
patent: 2580247 (1951-12-01), Secondi et al.
patent: 3377893 (1968-04-01), Shorb
patent: 3664213 (1972-05-01), Anati

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