Adjustable head structure for wrenches

Details Adjustable head structure for wrenches Adjustable head structure for wrenches

1995-12-28

1997-03-25

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Attachment, or including adjunct or replaceable portion

81185, 81DIG11, B25B 1358

Patent

active

056134100

ABSTRACT:
An adjustable head structure for wrenches is disclosed. The head structure has a head unit integrally formed with or separately formed from a wrench handle. The head unit is commonly used for tightening or loosening nuts and bolts having different sizes by detachably fitting a size adjusting block in one of fitting edges of a size adjusting opening eccentrically formed in the head unit. The head unit has a polygonal depression having side walls. The size adjusting opening having a plurality of fitting edges is eccentrically formed on the bottom of the depression such that the distances from the fitting edges to associated side walls of the depression are different from each other. A size adjusting block is selectively and detachably fitted in one of the fitting edges of the opening, thereby adjusting a grip size of the head unit.

REFERENCES:
patent: 810599 (1906-01-01), Ansorge
patent: 2500835 (1950-03-01), Lang
patent: 2758493 (1956-08-01), Goldwater
patent: 3877328 (1975-04-01), Sullivan

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