Cutlery – Cutting tools – With blade moving means
Reexamination Certificate
2000-04-08
2001-12-11
Payer, Hwei-Slu (Department: 3724)
Cutlery
Cutting tools
With blade moving means
C030S286000, C030S347000, C056S017400
Reexamination Certificate
active
06327782
ABSTRACT:
BACKGROUND OF THE INVENTION
Field
This invention concerns grass and weed cutting or trimming implements of the type commonly known as Weedeater® wherein a whirling Nylon or the like line or string, or a rigid blade provides the cutting element. Such implements are typically powered by electric motors, house current or battery powered, or gasoline powered engines and the line cutter types are fitted with string feed-out and cut-off devices which provide the proper length to the string either by manual or automatic actuation. Such implements are shown, for example, in U.S. Pat. Nos.: 2,583,113; 3,174,224; 3,306,015; 3,378,995; 3,453,732; 4,987,681; 5,010,720; 5,115,870; 5,279,100; 5,423,126; 5,524,349; 5,584,348; 5,924,205 the disclosures of which are hereby incorporated herein by reference. The present invention particularly concerns shielding for mounting on such implements for the protection of the users or bystanders against flying debris such as pebbles or stick pieces thrown out by the cutting element with damaging force.
Prior Art
Various protective shielding for such implements have been developed and include those shown in the aforementioned U.S. patents and GRAINGER catalog. These shieldings have been found to afford only limited usefulness however, because of one or more factors such as their cumbersomeness, structural weight and complexity, the hindrance they give to free motion of the cutting head when the shielding is brought into contact with the terrain, and the inherent danger of debris rebounding from rigid shielding.
OBJECTS OF THE INVENTION
Objects therefore of the present invention are: to provide a shielding for such implements which can be provided on original, factor produced cutting implements or adapted for retrofitting existing cutting implements and which allows near complete freedom of motion to the cutting head while affording markedly improved protection against flying debris; and to provide such shielding as an inexpensive and easy to install item.
SUMMARY OF THE INVENTION
The above and other objects have been attained in accordance with the present invention which is summarized as an implement for cutting grass or weeds or the like wherein a Weedeater type cutting head is provided on which a cutting line or blade or the like cutting element is mounted for rapid whirling motion, and wherein protective shielding is provided on the implement and interposed between the cutting element and the normal standing position of the operator, and a skirt-like mat of tough, resilient, flexible plastic filaments are provided on the shielding for extending downwardly therefrom toward and preferably into contact with a terrain surface when the implement is in its operative posture, said filaments being sufficiently flexible to readily conform to the terrain surface when brought into contact therewith to thereby afford greatly enhanced protection against flying debris while providing substantially unhindered freedom of motion to the cutting head.
REFERENCES:
patent: 2706941 (1955-04-01), Swanson
patent: 3006421 (1961-10-01), Feilbach
patent: 5077898 (1992-01-01), Hartwig
patent: 5423126 (1995-06-01), Byrne
patent: 5924205 (1999-07-01), Sugihara et al.
patent: 5940973 (1999-08-01), Kitz
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