Cutting blade for brush cutter

Abstract

A cutting blade has two ends and two sides and includes a mounting hole mounted on a front housing of a brush cutter; a convex member on a central portion of either side and having two notches at two ends respectively and an intermediate, curved cutting edge; and two cutting edges on either side with the convex member disposed between, each cutting edge having a first end terminated at the notch and a second end terminated at either end. Two cutting edges of different sides with the mounting hole disposed between comprise a plurality of groups of an outward inclined cutting member and a cavity. The other two cutting edges of different sides with the mounting hole disposed between comprise a plurality of groups of an inward inclined cutting member and a recess.

Claims

1. A cutting blade having two straight ends and two sides, comprising: two convex members each on a central portion of either side of the two sides of the cutting blade, each of said convex members including two notches at two ends respectively and an intermediate, curved cutting edge; a mounting hole disposed between the convex members; and two inclined cutting edges on either side of the two sides of the cutting blade with the convex member disposed between, each of said inclined cutting edges having a first end terminated at one of the notches and a second end terminated at either end of the two straight ends of the cutting blade; wherein one of said inclined cutting edges of either side of the two sides of the cutting blade comprise a plurality of groups of an outward inclined cutting member and a cavity; and wherein the other one of said inclined cutting edges of either side of the two sides of the cutting blade comprise a plurality of groups of an inward inclined cutting member and a recess.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a top view of a conventional cutting blade for brush cutter;

(2) FIG. 2 is a top view of another conventional cutting blade for brush cutter;

(3) FIG. 3 is a perspective view of a cutting blade according to a first preferred embodiment of the invention;

(4) FIG. 4 is a top view of FIG. 3;

(5) FIG. 5 is an environmental view of the cutting blade mounted to the front housing of a brush cutter;

(6) FIG. 6 is a perspective view of a cutting blade according to a second preferred embodiment of the invention;

(7) FIG. 7 is a top view of FIG. 6;

(8) FIG. 8 is an environmental view of the cutting blade of FIG. 6 mounted on the front housing of a brush cutter; and

(9) FIG. 9 is a perspective view of the cutting blade of FIG. 6 showing grass being cut.

DETAILED DESCRIPTION OF THE INVENTION

(10) Referring to FIGS. 3 to 5, an elongated cutting blade 30 for a brush cutter 60 in accordance with a first preferred embodiment of the invention comprises a mounting hole 31 mounted to a front housing 61 of the brush cutter 60, a convex member 32 on a central portion of either side 33 and having two notches 321 at two ends respectively and an intermediate, curved cutting edge 322, and two inclined cutting edges 35 on either side 33 with the convex member 32 disposed between, each cutting edge 35 having a first end terminated at the notch 321 and a second end terminated at either end 34. Two cutting edges 35 at different sides 33 with the mounting hole 31 disposed between comprise a plurality of groups of an outward inclined cutting member 35a and a cavity 35b. The other two cutting edges 35 at different sides 33 with the mounting hole 31 disposed between comprise a plurality of groups of an inward inclined cutting member 35c and a cavity 35d.

(11) It is envisaged by the invention that the outward inclined cutting members 35a, the cavities 35b, 35d, the inward inclined cutting members 35c, the notches 321, and the intermediate, curved cutting edges 322 together can completely cut grass.

(12) Referring to FIGS. 6 to 9, an elongated cutting blade 40 for a brush cutter 60 in accordance with a first preferred embodiment of the invention comprises a mounting hole 41 mounted to a front housing 61 of the brush cutter 60, a convex member 42 on a central portion of either side 43 and having two notches 421 at two ends respectively and an intermediate, curved cutting edge 422, and two curved cutting edges 45 on either side 43 with the convex member 42 disposed between, each cutting edge 45 having a first end terminated at the notch 421 and a second end terminated at the end 44. Two cutting edges 45 at different sides 43 with the mounting hole 41 disposed between comprise a plurality of groups of an outward inclined cutting member 45a and a cavity 45b. The other two cutting edges 45 at different sides 43 with the mounting hole 41 disposed between comprise a plurality of groups of an inward inclined cutting member 45c and a cavity 45d.

(13) It is envisaged by the invention that the outward inclined cutting members 45a, the cavities 45b, 45d, the inward inclined cutting members 45c, the notches 421, and the intermediate, curved cutting edges 422 together can completely cut grass 51.

(14) As shown in FIG. 9 specifically, the cutting blade 40 rotates counterclockwise so that the outward inclined cutting members 45a, the cavities 45b, 45d, and the inward inclined cutting members 45c can cut the grass 51 contacting all portions of the cutting blade 40 except the central portion of the cutting blade 40. Further, the notches 421 and the intermediate, curved cutting edges 422 can cut the grass 51 contacting the central portion of the cutting blade 40. As a result, the cutting blade 40 is capable of cutting the grass 51 completely.

(15) While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims.