Tools – Wrench – screwdriver – or driver therefor – Pivoted outer jaw
Patent
1996-04-16
1998-06-30
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Pivoted outer jaw
81111, 81155, 81167, B25B 1328
Patent
active
057717613
ABSTRACT:
A wrench includes a fixed jaw (16) at one end of a handle (15) and a pivoted jaw (19) joined to the handle by a pivot (20) disposed in a plane (30). A spring (25) urges the pivoted jaw through a gripping position in which flat gripping surfaces (17, 18) are parallel and separated by a distance which equals the size of the bolthead or nut to be turned. The plane (30) extends through the proximal edges of the surfaces (17, 18) which are flat from the plane to the distal edges of the jaws, and perpendicular to the plane. An auxiliary lever (45) assists in ratcheting. The wrenches may be single ended, double ended, or adjustable, in which case, an integral pivot bar (50) slides within the wrench handle perpendicular to the gripping surfaces (17, 18). A plurality of springs (25b, 25c) may be used.
REFERENCES:
patent: 471940 (1892-03-01), Brink
patent: 586738 (1897-07-01), Hall
patent: 1015504 (1912-01-01), Meyer
patent: 1634908 (1927-07-01), Lynch et al.
patent: 2655064 (1953-10-01), Simon et al.
patent: 3901106 (1975-08-01), Causey
Meislin D. S.
Williams M. P.
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