Patent ID: 6360517
Filing Date: 2002-03-26
Classification: A01D

Abstract:
A mower unit comprising;a housing; blades supported in said housing on each to be rotatable about a vertical axis acting as a center of rotation wherein each blade has a centerline intersecting with the vertical axis and bisecting the blade; cutting edges defined at front edge regions of each of said blades with respect to a direction of rotation thereof; and lift vanes defined at rear edge regions of each blade with respect to the direction of rotation thereof, each of said lift vanes including: a first vane portion defined by a first point and a second point, wherein the first vane portion extends from the first point radially outwardly and rearwardly with respect to the direction of rotation to the second point and wherein a line connecting the first point and the second point defines a first vane angle relative to the blade centerline; and a second vane portion adjacent to the first vane portion defined by the second point and a third point, wherein the second vane portion extends from the second point radially outward and rearwardly with respect to the direction of rotation to the third point and wherein a line connecting the second point and the third point defines a second vane angle which is less than the first vane angle.