A cutter blade for a mower includes a blade base part, a cutting part positioned further outward radially than the blade base part, a descending part formed between the blade base part and the cutting part, and a curved part formed so as to curve upward from the cutting part. The descending part and the curved part have an intersection part at which an end of the descending part in the counter-rotating direction and a radially inner end of the curved part intersect.

A cutter blade for a mower includes a blade base part, a cutting part positioned further outward radially than the blade base part, a descending part formed between the blade base part and the cutting part, and a curved part formed so as to curve upward from the cutting part. The descending part and the curved part have an intersection part at which an end of the descending part in the counter-rotating direction and a radially inner end of the curved part intersect.

A lawn mower includes a blade assembly configured to perform a cutting function. The blade assembly includes an upper blade mounted about a blade rotation axis and an upper blade proximal portion being substantially flat and including a first cutting edge. A lower blade is mounted in overlap with the upper blade about the blade rotation axis. The lower blade includes a lower blade proximal portion positioned outward from the lower blade mounting portion in a radial direction, a lower blade end portion positioned outward from the lower blade proximal portion and below the lower blade proximal portion, and a second cutting edge. A lower blade falling portion transitions from the lower blade proximal portion to the lower blade end portion.

A lawn mower includes a blade assembly configured to perform a cutting function. The blade assembly includes an upper blade mounted about a blade rotation axis and an upper blade proximal portion being substantially flat and including a first cutting edge. A lower blade is mounted in overlap with the upper blade about the blade rotation axis. The lower blade includes a lower blade proximal portion positioned outward from the lower blade mounting portion in a radial direction, a lower blade end portion positioned outward from the lower blade proximal portion and below the lower blade proximal portion, and a second cutting edge. A lower blade falling portion transitions from the lower blade proximal portion to the lower blade end portion.

A head 1 for brush cutter suitable for cutting grass and herbaceous plants having a support element 2, rotatable about a vertical axis Y-Y thereof, connected to a series of first pins 3 and a series of second pins 4. The series of first pins 3 is coupled to a first plurality of cutting elements 5 and the series of second pins 4 is coupled to a second plurality of cutting elements 6.

Said first plurality of cutting elements 5 defines a cutting plane P1 and said second plurality of cutting elements defines a second cutting plane P2, spaced apart from the previous one. The first and second plurality of cutting elements 5, 6 having, over an angular sector of 360° , an alternating arrangement.

A head 1 for brush cutter suitable for cutting grass and herbaceous plants having a support element 2, rotatable about a vertical axis Y-Y thereof, connected to a series of first pins 3 and a series of second pins 4. The series of first pins 3 is coupled to a first plurality of cutting elements 5 and the series of second pins 4 is coupled to a second plurality of cutting elements 6.

Said first plurality of cutting elements 5 defines a cutting plane P1 and said second plurality of cutting elements defines a second cutting plane P2, spaced apart from the previous one. The first and second plurality of cutting elements 5, 6 having, over an angular sector of 360° , an alternating arrangement.

A cutting blade (100) for a lawn mower may include a mounting portion (130) and a plurality of cutting elements (102,104,106,108). The mounting portion (130) may include a plurality of mounting arms (136) and a mounting orifice (132) formed at an axis of the cutting blade. The mounting orifice (132) may be configured to interface with a shaft of the lawn mower. Each of the cutting elements (102,104,106,108) may be operably coupled to a corresponding one of the mounting arms (136). Each of the cutting elements may include a wing portion (110) at a distal end thereof, and a transition region (120) configured to operably couple the wing portion (110) to a respective one of the mounting arms (136). The cutting elements may further include a first cutting edge (140) disposed at the wing portion (110), and a second cutting edge (142) disposed at the transition region (120).

A cutting blade (100) for a lawn mower may include a mounting portion (130) and a plurality of cutting elements (102,104,106,108). The mounting portion (130) may include a plurality of mounting arms (136) and a mounting orifice (132) formed at an axis of the cutting blade. The mounting orifice (132) may be configured to interface with a shaft of the lawn mower. Each of the cutting elements (102,104,106,108) may be operably coupled to a corresponding one of the mounting arms (136). Each of the cutting elements may include a wing portion (110) at a distal end thereof, and a transition region (120) configured to operably couple the wing portion (110) to a respective one of the mounting arms (136). The cutting elements may further include a first cutting edge (140) disposed at the wing portion (110), and a second cutting edge (142) disposed at the transition region (120).

Embodiments of blades for use with lawn mowers are provided herein. In some embodiments, a blade for a lawn mower includes a substantially flat central portion having a rotational axis configured to be coupled to a motor for rotating the blade; a distal portion extending radially from opposing sides of the flat central portion, the distal portion being a cutting region of the blade when mowing and defined by the following: a non-zero leading angle defining an angle of attack; and a non-zero camber percentage; and an intermediate portion disposed between the central portion and the distal portion and configured to minimize an amount of torsional stress between the central portion and the distal portion, wherein each distal portion comprises about 25 percent or less of a total length of the blade.

Embodiments of blades for use with lawn mowers are provided herein. In some embodiments, a blade for a lawn mower includes a substantially flat central portion having a rotational axis configured to be coupled to a motor for rotating the blade; a distal portion extending radially from opposing sides of the flat central portion, the distal portion being a cutting region of the blade when mowing and defined by the following: a non-zero leading angle defining an angle of attack; and a non-zero camber percentage; and an intermediate portion disposed between the central portion and the distal portion and configured to minimize an amount of torsional stress between the central portion and the distal portion, wherein each distal portion comprises about 25 percent or less of a total length of the blade.