Cutlery – Cutting tools – Plural cooperating blades
Reexamination Certificate
2000-02-19
2001-05-08
Watts, Douglas D. (Department: 3724)
Cutlery
Cutting tools
Plural cooperating blades
C030S500000
Reexamination Certificate
active
06226875
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shear device, and more particularly to a pair of grass shears.
2. Description of the Prior Art
Typical grass shears comprise two cutting blades movable relative to each other for cutting grass or the like. However, the typical grass shears are operated manually and may not be operated by power tools.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional grass shears.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a pair of grass shears operatable with power tools.
In accordance with one aspect of the invention, there is provided a pair of grass shears comprising a first blade including a first end having a handle provided thereon, a second blade rotatably secured to the first blade at a pivot pin and including a slot formed therein, a follower rotatably received in the handle and including an eccentric shaft extended therefrom and slidably engaged in the slot of the second blade, and means for rotating the follower to move the eccentric shaft along the slot of the second blade and to rotate the second blade relative to the first blade about the pivot pin.
The rotating means includes a first gear rotatably received in the handle and secured to the follower, and includes a second gear rotatably received in the handle and engaged with the first gear.
The handle includes a cap secured thereto for rotatably supporting the first gear and the second gear in the handle. The cap includes an orifice and an aperture and a cavity formed therein, the first gear is rotatably secured in the handle at a pivot rod, the pivot rod includes a first end rotatably engaged in the orifice of the cap. The second gear is partially and rotatably secured in the cavity of the handle at a pivot pole, the pivot pole includes a first end rotatably engaged in the aperture of the cap.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 3408875 (1968-11-01), Briskman et al.
patent: 3536976 (1970-10-01), Briskman et al.
Lii Sheau Pyng
Liu Kuo Chen
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