Tools – Wrench – screwdriver – or driver therefor – Plural pivoted jaws and handle-lever
Patent
1979-02-14
1980-11-25
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Plural pivoted jaws and handle-lever
81128, 279 37, B25B 1328
Patent
active
042351340
ABSTRACT:
An adjustable wrench comprises a supporting member having a plurality of gripping arms pivotally supported thereon. The gripping arms are moveable into and out of engagement with a hex-headed nut or bolt. The apparatus may be modified to use two or four or eight arms for gripping square-headed or octagonally-headed nuts or bolts. Obviously, the gripping structure could also be used for gripping other objects, as in a drill chuck or lathe.
The apparatus has a second moveable member capable of rotary motion adjacent to the supporting member. The second moveable member has supported thereon a cylindrical cam member moveable longitudinally of said gripping arms and engageable with cam surfaces thereon to move said arms pivotally inward into gripping relation. Said second rotary moveable member and said supporting member for said gripping arms are provided with cooperating rotary cam surfaces operable to move said moveable member, upon rotation thereof in either direction, to move said cylindrical cam member longitudinally of said gripping arms.
Special details are also disclosed of the hinge connection between said gripping arms and said supporting members. Also, disclosed are details of an optional arrangement interconnecting said moveable members to prevent twisting movement thereof.
REFERENCES:
patent: 1990525 (1935-02-01), Chancellor
patent: 2592037 (1952-04-01), Keiser
patent: 2745305 (1956-05-01), Reiffin
patent: 2850931 (1958-09-01), Conwax
patent: 3724299 (1973-04-01), Nelson
Mosely Neal J.
Smith James G.
LandOfFree
Adjustable wrench does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable wrench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable wrench will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1124645