Rotary cutting assembly having novel flail

Claim 1

Rotary cutting assembly for cutting vegetation with a rapidly whirling flail and comprising: A. an elongate lineal shaft extending along a vertical-axis, the shaft having a bottom-end and a top-end, said shaft being powerably rotatable about its vertical-axis; B. a base-plate co-rotatably associated with the shaft and located nearer the shaft bottom-end, said base-plate including a peripheral-edge lying within a horizontal plane and with the shaft vertical-axis at the substantial geometric center of the base-plate; and C. at least one retainer means attached to the base-plate for removably securing a flail to the base-plate, said at least one retainer being located nearer the base-plate peripheral-edge than to the shaft vertical axis; and D. an elongate horizontal flexible flail extending along a horizontal-axis extending radially outwardly from the shaft and continuing through the retainer means, said flail being wholly singularly constructed of tough resinous material and which comprises a central-core extending along the flail horizontal-axis, the flail also having an elongate external-contour surrounding the central-core and which flail external-contour is of regularly periodically varying cross-sectional size and shape along the entire flail length to provide numerous protuberances at regular intervals therealong, said multi-protuberances flail promoting efficaceous vegetation cutting action as said horizontal flail rotates about the shaft vertical-axis.