Abstract: A vegetation cutting implement includes a rotatable support head which mounts a hub having a plurality of cutter elements comprising self-supporting struts. Each strut is more than 50% non-metallic material (typically more than 90% plastic or rubber), and the hub is readily replaceable in the vegetation cutting implement merely by detaching a fastener. Typically the cutter elements are integral with the hub, although a number of radially extending openings may be provided through which individually replaceable cutter elements pass. The self-supporting struts each preferably comprise a beam-like structure with a first axis which is the strongest axis and has a highest moment of inertia and a second, weaker axis, and the head is rotated so that the first axis of the beam-like structure of each strut is positively maintained and moves in a predetermined cutting plane which is generally transverse to a portion of vegetation to be cut.

Abstract: The present invention is a one-piece fixed line vegetation cutting head with several advantages. It is easily adaptable to virtually any vegetation trimmer and it will accommodate a variety of types and gauges of both cutting filament line and wire. The preferred embodiment has an upper portion with the shape of an inverted truncated cone which gives the head an advantage in deep vegetation by hindering the advance and entanglement of long pieces of vegetation around the vegetation trimmer's drive shaft. The preferred embodiment also has a disc-shaped lower portion with two pairs of cutting filament line passage holes in opposed positions near the circumference of the disc which are oriented at oblique angles to both the diameter and the central bore of the disc. When a discrete length of cutting filament line is inserted through the adjacent passage holes in each pair, it is subjected to less bending and wear during high speed rotation than would be experienced with the use of non-angular passage holes.

Abstract: An apparatus and a method for cutting vegetation and simultaneously treating the remaining stems of the cut vegetation with a treatment fluid. The apparatus includes a mower, a cutting blade drive rotatably mounted on the mower, a blade carrier secured to the rotatable drive, and at least one cutting blade assembly rotatably mounted on the blade carrier. The apparatus further includes a fluid container for containing the treatment fluid in a plurality of interconnected, stackable and removable fluid container cells, a pumping device for pumping the treatment fluid to the at least one cutting blade assembly, a flow control device for metering the amount of treatment fluid that is pumped to the at least one cutting blade assembly, and a fluid conduit device for delivering the treatment fluid from the fluid container to the cutting and treating device.

Abstract: A cutting attachment for use with a vegetation cutting device. The cutting attachment has a body with a generally planar coupling portion and a central axis of rotation. In one embodiment, the body further includes a conical central wall portion extending radially outwardly and in a first direction from the coupling portion and the axis and a circular outer wall portion adjoining the central wall portion and extending generally radially outwardly therefrom. The central wall portion defines a conically-shaped self-cleaning inner cavity disposed symmetrically about the axis. The outer wall portion has a generally smooth outer surface which serves as a skid plate. An outer self-cleaning cavity is formed by an outer surface of the central wall portion and an inner surface of the outer wall portion. A coupling assembly, which can include an adapter having first and second clamping elements, is carried by the coupling portion for coupling the body to the cutting device to cause rotation about the axis.

Abstract: A process for forming flexible cutting line for use in rotary vegetation trimmers of the type having two or more monofilament lines mounted on a common spool. The line produced by the process of the present invention defines two monofilament strands joined together in a side-by-side relationship by a severable bond. Each strand defines a plurality of circumferentially spaced and outwardly projecting vegetation cutting edges thereon, two of the edges on one of the strands being in parallel contact with two of the edges on the other strand so as to define a pair of parallel readily severable welds bonding the strands together in a side-by-side disposition.

Abstract: A vegetation trimmer attachment head includes a main body, a plurality of elongated blades extending radially outward therefrom, and pins to pivotably attach the blades to the main body. A single pin cover mates with the main body to retain the pins in place. The pin cover is held in place by being interposed between the main body and the vegetation cutting device. The attachment head is simple and can be quickly disassembled and reassembled without tools because it has few parts, none of which are threaded or snap together.

Abstract: A mower comprising a frame, a deck with a discharge located forwardly of at least one cutting blade, a baffle in the deck disposed between the blade and discharge that is spaced from the top wall of the deck defining a discharge aperture in the deck that creates suction and focuses clippings toward the discharge, and wheels coupled to the frame by a suspension preferably of independent construction. Each blade is massive for high inertia, generally planar, and disc-shaped having at least three cutting arms that each have a tab extending below the plane and having a cutting edge. Each arm preferably also has an upwardly extending suction-increasing flap. The suspension has a pair of control arms pivotally mounted to the frame with each arm having a mounting arm extending above the frame capturing a biasing element that urges the arms away from each other to keep the wheels in contact with the ground.

Abstract: A cutting assembly adapted for use in line trimmers that employ either a spooled filament or a fixed filament. The cutting assembly comprises a cutting filament consisting of a stainless steel filament coated with a polymeric elastomer, steel tube-type collar stops, and allen head set screws. The cutting performance and capabilities of commercially available vegetation trimmers can be substantially improved by replacing their cutting assembly with the instant cutting assembly. The cutting filament does not have a point of attachment within the rotating housing hub located on the bottom of the trimmer, thereby enabling the cutting filament to better follow the rotation of the hub, and thereby improve the overall cutting ability of the trimmer.

Abstract: An apparatus and method for forming a string trimmer head assembly is disclosed. The head assembly includes a head and one or more flails. Each flail includes at least one deformed portion and at least one undeformed portion and the head includes a flail holding portion adapted to mate with the deformed portion for securing the flail to the head.

Abstract: A mobile implement for mulching which provides complete control of the mulching process and uniformly distributes the mulch back upon the lawn. Grass and leaves are cut using a standard cutting blade. The mass of cut vegetation is then lifted upward into a hammermill by the trailing edge of the rotating cutting blade. The air stream generated by the rotating hammers of the hammermill forces the vegetation against a shear screen. Repeated blows by the hammers chop the vegetation to a controlled size and force it through the screen. A portion of the chopped mulch falls back upon the ground in the area of the trailing quadrant of the implement's path. The remainder of the mulch is forced into the discharge duct and blown uniformly out onto the lawn through the discharge opening of the mower housing. This same system of hardware may be incorporated into either a hand push or a power driven rotary mower as well as a gang unit, mounted on or pulled by a tractor.

Abstract: A cutter blade is pivotally attached to a blade carrier so that it may operate as a flail. The blade carrier itself rotates about a drive shaft spaced from the pivot axis. A pivot pin is received in respective bores of the cutter blade and the blade carrier; a distal, protruding portion of the pivot pin is threaded. A pair of clamping collar halves each have a threaded surface which threadedly engage the threaded portion of the pivot pin shaft. After the correct amount of axial play between the cutter blade and the carrier is adjusted by rotating the collar halves on the shaft threads, the collar halves are clamped together on the pivot shaft using fasteners so as to affix the clamping collar halves to the shaft.

Abstract: A blade for a rotary mower, in particular lawnmowers, with a cup-like downward open cover (21) for the seating of the blade (1) presenting two sails (4, 4') that are provided on their front longitudinal edges (5, 5') in the direction of rotation with cutting edges (6, 6). The cutting edges of the blade sails of the blade according to the present invention constitute several cutting planes, whereby the outer cutting edge section (8) within the region of the sail extremities is located below the plane of the blade's hub portion (3). To this outer cutting edge section (8, 8') is attached a central cutting edge section (10, 10') that curves above the plane of the hub portion (3) and changes over to an inner cutting edge section (13, 13') that drops off toward the hub portion (3).

Abstract: A rotary blade assembly for a rotary mower that provides an equivalent cut with a substantial reduction in necessary driving power, and a method of implementing the same to reduce the necessary driving power of a mower. The rotary blade assembly includes a support structure fixedly disposed to a rotary drive shaft, at a height sufficient to avoid or to minimize contact with vegetation, such that the rotary drive shaft rotates the support structure about an axis. The rotary blade assembly includes a plurality of cutting elements that project downwardly and outwardly from the support structure to a predetermined distance such that the cutting elements are positioned to avoid contact with the ground and to cover the area to be cut in a more uniform way. The support structure of the rotary blade assembly can be a support arm having the cutting elements spaced over a length thereof.

Abstract: A fixed line trimmer head for string trimmer machines is made to accommodate trimmer lines of a range of line sizes, from a relatively small diameter line to a maximum diameter line, typically from 0.080" to 0.160". To accomplish this, the trimmer head consists of a generally cylindrically-shaped hollow main housing member having a central axis through it. Exit openings for the line are formed on diametrically opposite sides of the main housing member in a plane which is perpendicular to the axis of the housing member. A first set of string entry holes is formed through the housing member in a plane which is offset from the plane of the exit openings; and these holes are located on opposite sides of a line which is perpendicular to the projection of a line passing through the exit openings.

Abstract: Mowing mechanism for lawn mower with a housing (10) and at least one motor driven blade disc provided in the housing (18, 20), on which cutting blades (20, 24) are secured. Pairs of each other opposing cutting blades (20, 24) extend outwardly from the blade disk and parallel to them, wherein each pair is comprised of an upper blade (22) and a lower blade (24). The cutting blades (22, 24) can exhibit shovel like bent edges (32) for achieving a ventilator effect. When desired two identical blade disks (18, 20) can be provided to each other in the housing, wherein the areas of coverage of the respective blades (22, 24) overlap with each other.

Abstract: An elongated flexible cutting string, or substantially self-supporting strut cutting element, is connectable to a rotating device for use in a method of cutting vegetation. The cutting string has numerous advantages over conventional cutting strings, having a drag coefficient which is at least about 5% (e.g. 10-300%) less than the drag coefficient of a string having a substantially round and smooth cross-section. The drag coefficient of aerodynamic line 10 is 1.0 or less, e.g. about 0.35 or less. The cross-sectional configuration preferably simulates a tear drop (with or without an extension nose), and can have a textured (e.g. with golf ball simulating dimples, saw toothed or a wavy configuration) exterior surface. The pitch of the line is positively maintained while it is rotated in a cutting plane, e.g. controlled with an eyelet and/or a compound taper. Other cross-sectional configurations are an ellipse of at least 1.

Abstract: A string trimmer head and head assembly include a plurality of arms which connect the head to a hub member. One or more flails are captured between the head and the hub member and extend outwardly into a cutting plane.

Abstract: The present invention provides a lawn mower blade spindle assembly which can be easily serviced in the field, which includes a blade height adjustment feature which allows a blade to be replaced or be adjusted without removing the blade spindle bearings. An improved stress loading arrangement is further provided which reduces spindle stress and lessens the opportunity for spindle assembly failure upon catastrophic blade impact with an immovable object such as with a rock.

Abstract: A cutting disc (12) for a lawn mower, the disc (12) having a plurality of cutting blades (13) and being formed with apertures (23). Associated with the apertures (23) are fan blades (22) which force air downwardly through the disc (12) to aid in mulching cut grass.

Abstract: A mower deck is disclosed that utilizes an auxiliary source of pressurized air in order to avoid clipping buildup under the mowing deck, most particularly at the trailing edge of the discharge chute. The auxiliary source of air comes through a cloverleaf shaped hole in the mower deck. The spindle is mounted to the mower deck through this hole, as in conventional mowers. However, unlike conventional mowers, because the hole in the mower deck has a cloverleaf configuration air can flow through the corner portions of the cloverleaf configured hole and act as an auxiliary source of air even though the spindle is mounted to the mower deck through the hole.

Abstract: A blade adapter for attaching a mower blade to a blade drive shaft of a lawn mower is disclosed. The blade adapter includes first and second extensions that extend beneath the bottom surface of the blade adapter and correspond with holes located along a longitudinal axis of the mowing blade equadistance from the center hole of the mowing blade. The first and second extensions act to pass torque between the blade adapter and the mowing blade, thereby reducing stresses on the teeth and slots of the central section of the blade adapter and mowing blade. A method for installing a mowing blade onto the disclosed blade adapter is also disclosed which includes the step of aligning the first and second holes of the mowing blade with the first and second extensions of the blade adapter and aligning the central star hole of the mowing blade with the central star section of the blade adapter.

Abstract: A modular disc cutterbar utilizes self-contained cutter modules clamped between alternating spacer modules by fasteners engaged with the spacer modules. To resist bending moments in the cutterbar, selected fasteners can have a length to span more than one cutter module. The drive mechanism is also of a modular construction including a symmetrical, reversible sealed drive apparatus within each cutter module and a transfer shaft passing through each interstitial spacer module to interconnect each cutter module drive mechanism. The drive apparatus incorporates an oil slinger to keep the remote seals lubricated. The rock guard for each cutter module is mounted on the adjacent spacer modules, while the skid shoe mounting is simplified. A crop mover mounted on each disc member above the cutting knife improves the transfer of severed crop material.

Abstract: The sharpness or efficiency of cutting edges of blade rails or other blades used in mowing mechanisms is very rapidly lost on meeting a obstacle. The blade shape of this invention, presents a cutting edge including a series of adjacent parallel recesses transversely to the cutting edge on the top of the blade. This gives equidistant thin and complete material. A differentiation is made on the cutting edge between the protective material (full thickness) and sharp edges (recesses). Experience has shown that, on the encountering of an obstacle, the cutting edge (thin Material) is protected by the full material to its left and right which results in a long useful life with relatively constant cutting efficiency.

Abstract: A rotary blade for a mower or cutter is formed from boron steel, such as 10B38 steel, and is heat treated to yield high hardnesses of 48 Rockwell C or above. The blade has increased hardness because of the heat treating, but due to the alloy composition, is still sufficiently tough to perform satisfactorily as a cutting blade, in particular to pass conventional impact tests. Furthermore, the low carbon content of the blade makes cold working of the part practical.

Abstract: A safety lawn mower blade is provided including a central portion removably coupled to a conventional lawn mower. Also included is a plurality of replaceable blades removably coupled to a periphery of the central portion and extended radially therefrom.

Abstract: A string cutter head for weed trimmers comprises a solid seamless hub having an upper disk and a lower disk. The lower disk comprises at least two pairs of vertically drilled holes for installation of a monofilament cutting string. The upper disk acts as a spacer from the trimmer housing to allow installation and removal of cutting string without removal of the cutting head from the weed trimmer. Several holes of different diameters may be used for different diameter strings. The hub comprises a threaded connection for attachment to the shaft end of the trimmer. In the preferred embodiment, the hub is machined from aluminum alloy.

Abstract: The felling head is operatively installed at the front end of a tractor vehicle, and used for debrushing a brush covered terrain. It comprises a rigid framework, from which downwardly depends a pair of flat, spaced-apart elongated skates that slidingly rest on the ground and support the framework over ground. A pair of discoid saw blades are rotatably supported by the frame, with a ground clearance of a few inches relative to the plane of the skates. The framework is hingedly attached to the tractor vehicle by of a pair of linked parallel parallelograms forced into a common pivotal displacement, each having four rigid bars hingedly attached to one another so as to form a parallelogram configuration. A pair of hydraulic cylinders act on the parallelograms and on the frame, so as to allow vertical linear movement of the frame and a distinct vertical pivotal movement thereof.

Abstract: A new lawn mower blade for improving the cutting edge to produce a more efficient cutting area. The inventive device includes an elongate blade member, a first scalloped cutting edge region on one end of the blade member, a second scalloped cutting edge region on the other end, a first deflecting fin on the opposite edge of the second scalloped cutting edge region, a second deflecting fin on the opposite edge of the first scalloped cutting edge region, and a mounting means for mounting the blade member to a lawnmower. The new lawn mower blade is designed to increase the surface area of the cutting edge to effectively cut grass cleaner and more even than a conventional rotary lawn mower blade.

Abstract: A rotary blade for a mower or cutter is formed from boron steel, such as 10B38 steel, and is heat treated to yield high hardnesses of 48 Rockwell C or above. The blade has increased hardness because of the heat treating, but due to the alloy composition, is still sufficiently tough to perform satisfactorily as a cutting blade, in particular to pass conventional impact tests. Furthermore, the low carbon content of the blade makes cold working of the part practical.

Abstract: A mulching mower is provided which is capable of cutting grasses finely without leaving uncut grasses and which is capable of discharging the cut grass clippings onto the cut grass path so as to be evenly dispersed. A pair of cutter blades are arranged to the right and to the left of the mulching mower in a cutter housing which opens downwardly. A guitar-shaped or figure 8 shaped enclosure wall hangs down from an under surface of an upper wall of the cutter housing to completely surround the periphery of the right and left cutter blades along tip end rotation loci of the blades at a slight distance therefrom. The enclosure wall is formed by side wall portions ar right and left outsides of the cutter housing and front and rear enclosure wall portions hang down from the under surface. The cutter blades rotate in opposite directions from each other so that tip ends of the cutter blades move from front to rear at right and left outsides, respectively, of the mulching mower.

Abstract: A rotary cutting assembly to be attached to a rotary shaft of a weed trimming device for cutting vegetation. The rotary cutting assembly includes a cutting member constructed of a hub and a plurality of cable ties secured to the hub such that a spoke pattern is formed. Due to the cable ties' relatively heavy mass and ability to resist a wide range of dynamic stresses that may be placed thereon during normal operation of the weed trimming device, the cutting member of the present invention can be used to cut through thick and dense vegetation. The cutting member is encased between a top cover and a bottom casing. The bottom casing is defined in part by a semi-dome shaped portion which is sized to engage the outer periphery of the top cover to encapsulate the cutting member to ensure that the hub and the head portion of the cable ties remain protected and insulated from the environmental elements typically encountered by weed trimming device.

Abstract: A disk mower moveable in a cutting direction includes a mower cutter support and a plurality of mowing disks mounted on the cutter support, the mowing disks being aligned in a direction generally perpendicular to the cutting direction. Each of the mowing disks rotate within a working circle having a working circle diameter, the working circle diameter of at least one of the mowing disks being different from the working circle diameter of at least one other mowing disk.

Abstract: A drive connection between a spindle and a mowing blade wherein the roots of the extending teeth of the interlocking member define an inner diameter substantially equal to the threaded stud utilized to hold the blade on the spindle.

Abstract: A circular brush cutting blade with peripheral cutting teeth. Segments are bent or deflected out of the blade body at an angle to the plane of the blade less than normal. The segments are configured to provide an inclined leading edge for each segment that cuts a laterally extended path with movement of the blade laterally or axially. The segments produced by folding the segments around a base line or juncture with the blade body whereby the opening through the blade created thereby is radially outward of the juncture.

Abstract: A rotary mower includes a flanged, straight rotary mower arm with a plurality of spaced, cutting width related knife blades and suspension hooks. The knife blades are adjustable to various cutting widths and are angular in configuration with respect to the grass being cut. The angular blades are arranged to provide a recutting element to mulch the cut grass in addition to the primary cutting.

Abstract: For a device for cutting plants with a cutting line (36, 38) which rotates around an axis of rotation and is wound on a reel (13), wherein a slide (16) releasably locks the reel (13) by means of a cam (26) with respect to elements which rotatingly take it along, wherein the length of the free end (37, 39) of the cutting line (36, 38) can be adjusted by unlocking the reel (13), wherein the slide (16) is displaced out of its locked position into its unlocked position by means of centrifugal force in the course of the shortening of the cutting line (36, 38), the cutting line adjustment is simplified and functionally improved in that the slide (16) is maintained in its locked position only by means of the force equilibrium of the mass support forces between its cam (26) and a detent (28) on the reel side, out of which it is displaceable by centrifugal force into its unlocked position, so that the reel (13) can rotate in respect to the cup (12), wherein the cam (26) is returned into the locked position by the mass

Abstract: A rotary mower cutter disc includes a replaceable knife mount shield which, in one embodiment, comprises a unitary slotted body which is received over the edge of the disc and held in place by the knife mounting bolt. The nut holding the bolt in place is located within a cylindrical cavity of the shield. In a second embodiment, the shield in made in two pieces mounted in sandwiching relationship to the mounting location of the disc having a back-turned lip defining a slot received over the edge of the disc and with the other piece being located on the side of the disc beside the lip and forming the cylindrical cavity for protecting the nut of the knife mounting bolt.

Abstract: A cutting tool for use with a brush cutter, trimmer or like device (1) for cutting thicket, grass and like vegetation, wherein the device includes a rotary shaft (3) for receiving a cutting tool which includes a rotatable center disc (6) which can be fitted to the tool and which includes cutting blades (9) having a cutting edge (10) along the front side of the blade as seen in the direction of rotation, wherein each individual cutting blade (9) is bent down through a first angle (v) such that the rear edge of the cutting blade (9) will be located closer to the ground than the edge-provided front side (10) of the blade when the center disc is held parallel with the ground, so that as the centre disc (6) rotates air will be pressed down towards the ground and therewith causes the tool to hover or lift slightly above the ground surface.

Abstract: A blade assembly is provided for a lawn mower which includes first and second fan blades to maintain the interior of the blade housing free of accumulated grass clippings as occur when mowing damp or wet grass. The blade assembly includes a conventional grass cutting blade and two axially spaced and radially displaced fan blades which are affixed to the engine shaft, above the cutting blade. The fan blades create sufficient turbulence within the housing to prevent grass accumulation, thereby improving the ability and efficiency of the mower.

Abstract: A mulching mower is provided for mowing and mulching turf vegetation in order to reduce the size of the cut vegetation and more evenly distribute the vegetation once thus cut. Counterrotating, coaxial mowing blade and mulching tool assemblies are provided. The mowing blade assembly is driven by a central shaft rotatably mounted through a drive barrel which drives the mulching tool. The mulching tool assembly includes a plurality of blades, typically pivotally mounted, at least one of the mulching blades being in a lower mulching plane, and at least one other of the mulching blades being in an upper mulching plane.

Abstract: One or more replaceable cutting blade tips and a central mounting bar comprise a blade assembly. Each of the replaceable cutting blade tips can be selectively attached to the central mounting bar without the use of tools. During typical operation, the replaceable cutting blade tips snugly fit relative to the central mounting bar and little, if any, relative pivoting therebetween is evident. However, some relative pivoting can occur when exceptional loads are encountered by the replaceable cutting blade tips such as when an obstacle such as a rock is encountered. In such an instance, a tearable "zipper" is provided which allows the blade tip to "tear" its way through the zipper while pivoting, thus advantageously providing a means for dissipating energy. Also provided is a "family of bars" concept which reduces inventory, reduces tooling expenses, and facilitates efficient and correspondingly low cost blade tips due to the volumes possible.

Abstract: A rotary mower (42) suitable for mowing ground vegetation including a cutting system (76) having a cutting deck (105). Mounted beneath the cutting deck (105) is a plurality of rotatable cutting blades (16), wherein each cutting blade (16) comprises a central portion (60) and first and second spaced apart tip portions (62a, b), wherein each tip portion (62) comprises a leading edge (56 ) having a sharpened cutting surface (64) for cutting the vegetation, a trailing edge (58), and an extending surface or "sail" (70) generally extending from the tip portion (62), whereby the sail (70a) of the first tip portion (62a) is different from than the sail (70b) of the second tip portion (62b).

Abstract: A rotary blade including a disc and a ring secured to the disc, wherein the ring has cutting filaments that extend radially outward past the outer edge of the disc. As the disc is rotated the filaments are adapted for cutting grass and the like. Projections extending from the disc create an air turbulence that both lifts the vegetation to be cut and swirls the clippings to further mulch the clippings.

Abstract: A rotary blade for a rotary mower that provides an equivalent cut with a substantial reduction in necessary driving power, and a method of implementing the same to reduce the necessary driving power of a preexisting mower. The rotary blade includes a support arm fixedly disposed symmetrically about a rotary drive shaft, at a height sufficient to avoid contact with vegetation cut by the blade, such that the rotary drive shaft rotates the support arm about an axis. The rotary blade also includes several cutting elements attached to the support arm which have respective longitudinal axes that project downward from the support arm to a predetermined distance such that the cutting elements are positioned to avoid contact with the ground.

Abstract: A cutting head for a string trimmer is provided which accommodates any string gauge thickness and may be easily and quickly re-threaded upon failure of a string previously disposed therein. Clamping members are provided to clamp the strings within the cutter head, with the clamping force being provided by springs and centrifugally generated moments. The clamping members are capable of generating two degrees of clamping force. The lesser degree of clamping force can be overcome by a string forcibly inserted into the cutting head.

Abstract: A cutting attachment is provided having a first body member, a second body member and a plurality of pins spaced an equi-distance apart for connecting the first body member to the second body member to form a rigid body wherein at least a portion of the first and second body members are spatially disposed a distance apart, each of the pins having a bearing surface substantially corresponding in length to the distance between the first and second body members.

Abstract: A reversible mower blade is formed from an elongated length of bar stock, the end portions of the blade including respective outer segments twisted in opposite senses about the longitudinal axis of the blade's central portion and respective inner segments also twisted in opposite senses about the axis. The inner and outer segment which form an end portion of the blade are twisted about the axis in opposite sense relative to one another.

Abstract: A lawn mower includes a housing having a top wall portion and a generally vertically extending side wall portion. A plurality of wheels attached to the housing to allow the housing to roll over a surface to be mowed. An engine mounted atop the housing rotatably drives a shaft extending through the housing. An elongate blade attached to and rotatable with the shaft has a central portion and a pair of end portions, with at least one of the end portions including a cutting edge for cutting vegetation disposed inside of the housing to a first length upon rotation of the blade. A pair of line trimmer assemblies are attached to the blade to provide a pair of filament lines which extend radially outside of the housing to cut vegetation disposed outside of the housing to a second length upon rotation of the blade.

Abstract: In order to provide a rotating trimming line (10) for brush cutters (100) equipped with a driving motor (119) which sets the rotating trimming line (10) that is clampingly secured with one end (13) into rotational movement, in which case the rotating trimming line (10), by virtue of the centrifugal force, extends essentially toward the outside and the rotating trimming device (10) is constructed in such a way that, in relation to its longitudinal axis (L), it possesses a varying position of the cross-section, with which, even at a high speed of rotation or at a high number of revolutions per unit time of the rotating trimming line, a substantial noise reduction can be achieved in comparison with the known rotating trimming line embodiments, which is simple to manufacture and which possesses a great stability, it is proposed that the rotating trimming line (10) possesses a radially symmetrical, viz.

Abstract: A line for a rotating trimmer has a plurality of longitudinal outwardly-extending cutting edges, spaced circumferentially about the main body portion of the line. A cross-sectional area of the main body portion is selected to be between 70 percent and 90 percent of the area of the space circumscribing the cutting edges to provide substantial bulk to the line to increase its wear, while retaining the advantages of the cutting edges for facilitating cutting of grass and the like.