Adjustable pliers

Details Adjustable pliers Adjustable pliers

1999-12-22

2001-03-13

Meislin, D. S. (Department: 3729)

Tools

Tool jaw

Adjustable relationship between jaw

C081S413000, C081S357000

Reexamination Certificate

active

06199459

ABSTRACT:

This invention deals with improved adjustable pliers.
Pliers with two bodies that pivot and slide together are already well-known.
The research has been focused, on the one hand, on the shape of the mouth and its jaws—which determine the efficiency of the pliers—and on the other, on the way to position the two bodies together—and keep them positioned—in order to determine the correct position of these bodies when gripping tubes of different diameters.
The part is gripped by the pliers with its teeth, but as different pliers cannot be manufactured for each part diameter, some pliers are manufactured, which adapt to different thicknesses or diameters, for examples of tubes, and pliers have been sought that can grip the largest number of diameters possible, especially when the diameters of the tubes corresponding to the European measurement system are slightly different from those of the US measurement system.
There are already some adjustable pliers that are comprised of two bodies that bear the mouth jaws, and which pivot together on a moveable pivot in a groove and which can be fitted into different heights of one of the bodies. Proceedings U-8900254, DE-20316561, U.S. Pat. No. 3,005,368 and U.S. Pat. No. 4,269,089, among others are mentioned as examples.
One of the problems of these adjustable pliers with traditional technology is the security of keeping the arms positioned together and releasing them easily.
The improved adjustable pliers according to the invention exceed these limitations advocating new pliers of the type described, which are characterised because:
a).—this groove, foreseen in one of the bodies, has monodirectional teeth on one of its walls;
b).—the axle-pivot, foreseen in the other body, has a catch, which defines combined monodirectional pluri-teeth and an operating arm to release these teeth at the user's will;
c).—this catch has a spring which is aimed at keeping it in a fastened position, until the arm of the catch is activated.
The pluri-toothed catch (instead of one tooth) offers the advantage of quick and secure positioning of the arms together.
The catch operating arm offers the user easy, accessible, economical and rapid control to release pluri-teeth of the catch from the pluri-teeth in the groove, or in other words, to release the arms.


REFERENCES:
patent: 1867505 (1932-07-01), Graner
patent: 5887495 (1999-03-01), Kao

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