Multi-purpose attachments for power lawn mower blades

Abstract

The multi-purpose attachments for power lawn mower blades are designed to increase the efficiency and usefulness of the mower both to cut lawns and blow snow, leaves or debris from areas. The serrated cutter attachments allow replacement with ease, have longer lasting sharpness and the cutting surface is protected from foreign objects. In addition, the serrated cutters may be manufactured economically enough to allow used cutter attachments to be discarded. The blower attachments are designed to create adequate air pressure to remove snow, leaves and debris from select areas. The blower attachments are also designed to be resilient to assure safe use if foreign objects are struck during such use.

What is claimed is: .[.1. Attachments for the horizontal directional blade of a powered rotary lawn mower that will allow multi-purpose use of the power equipment comprising in combination: 
     
        object resting on the surface beneath..]..Iadd.2.  An accessory cutting assembly for mounting and use with a rotary linear bar normally adapted to serve as a mowing and/or trimming device by virtue of a pair of cutting edges incorporated into the opposing leading edges of said bar, wherein said planar bar is centrally mounted on a powered output shaft adapted to rotate about a vertical axis of rotation, the accessory assembling including: (a) a rigid formed component having two essentially rectangular planar elements being conjoined along their longer dimension at an acute angle to present a V-shaped vertical cross section defining both external and an internal linear edges;   (b) the external linear edge of the V-shaped conjuncture of said component is provided with adjacent multiple concave cutting edges extending along substantially all of its external linear edge;   (c) a first of the planar elements having a shorter transverse dimension and being positioned to enfold the planar bar normal cutting edge, and its open linear dimension being oriented toward the trailing edge of said cutting bar which provides same with an angular airfoil effect;   (d) the second of the planar elements having a larger and elongate transverse dimension adapted to closely overlay the undersurface of the planar cutting bar; and   (e) at least one borehole positioned centrally of the transverse dimension of the second planar element positioned to align itself with a normally existing perforation in the outer section of the planar bar providing a common passageway for securing one to the other fixedly during cutter bar   
     
     
        operation. .Iaddend..Iadd.3.  The accessory assembly of claim 2 in which the transverse dimension of the second planar element is adapted to closely overlap the external surface of the dual planar cutter bar, which bar is provided with an air foil configuration when seen in vertical cross section. .Iaddend..Iadd.4. The accessory assembly of claim 2 in which the transverse dimension of the second planar element is adapted to closely overlap a generally planar external cutter bar surface which bar is provided with an uninterrupted linear vertical cross section. .Iaddend..Iadd.5. The accessory assembly of claim 2 in which the serrated linear edge of the V-shaped conjuncture is provided with a beveled outer corner. .Iaddend..Iadd.6. The accessory assembly of claim 2 in which the overlapping outer surface of the cutter bar and the second planar element are maintained secured by a machine bolt, washer and lock nut combination with the bolt head oriented to project from the undersurface of said 
     
     
        planar element to minimize cutting material pickup. .Iaddend..Iadd.7.  The accessory assembly of claim 2 in which the second planar element along its trailing linear edge is provided with an upward flange adapted to enclose the trailing linear edge of said planar bar. .Iaddend..Iadd.8. The accessory assembly of claim 2 in which the serrated linear edge of the V-shaped conjuncture is provided with protruding parts leaving the recessed concave areas capable of efficient cutting. .Iaddend.