Tool comprising a damping and/or opening spring

Details Tool comprising a damping and/or opening spring Tool comprising a damping and/or opening spring

1999-02-25

2001-07-24

Hail, III, Joseph J. (Department: 3723)

Tools

Tool jaw

Resiliently urged

Reexamination Certificate

active

06263770

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tool, of the type comprising an arm or handle which has a metal part and which, when the tool is used, is brought closer to an element opposite, particularly consisting of a base or of another arm or handle of the tool, and a damping and/or opening spring.
2. Discussion of the Related Art
The invention applies particularly to the various types of pliers (flat-nose or round-nose pliers, so-called combination pliers, side cutters, etc.), to secateurs and to tools comprising a relatively long arm or lever articulated by one end to a base, such as shears, guillotines, ricers, etc.
SUMMARY OF THE INVENTION
The object of the invention is to provide a damping and/or opening spring which, although particularly economical, can be passed on in varying forms suited to predetermined behaviour during use of the tool, and which can also act as a member for positioning and/or limiting the extent of opening of the arm with respect to the element opposite.
To this end, the subject of the invention is a tool of the aforementioned type, characterized in that the spring comprises a spring-forming part based on flexible polymer or elastomer, which flexes and/or compresses as the said arm is brought closer, and the ends of which are secured respectively to the arm and to the element opposite.


REFERENCES:
patent: 3458933 (1969-08-01), Rogers
patent: 3583264 (1971-06-01), Brunosson et al.
patent: 3921478 (1975-11-01), Ygfors
patent: 4304158 (1981-12-01), Brunosson et al.
patent: 5522289 (1996-06-01), Eggert
patent: 5522290 (1996-06-01), Visser et al.
patent: 5603643 (1997-02-01), Krivec
patent: 1443913 (1976-07-01), None

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