Abstract: A mowing head is described, particularly for a bush-cutter, comprising a rotor rotating around a rotation axis (R-R) and its cover, in which the rotor is equipped with at least one supporting surface from which at least one external perimeter wall and at least one internal wall depart, such external perimeter wall and such internal wall mutually defining at least one housing seat of at least one length of flexible cutter, the external perimeter wall being radially equipped with at least one slit adapted to allow at least one length of the flexible cutter to go out from inside the housing seat to the outside.

Abstract: A rotary mower includes a rotary cutting disk, at least one knife, at least one knife pin, and a spring plate. The rotary cutting disk has at least one knife mount location. Each knife has an end with an opening therein. Each knife opening has a double keyhole shape with a larger center hole and two smaller partial holes respectively on generally opposite sides of the center hole. Each knife pin extends through a corresponding knife opening and is mounted to the rotary cutting disk at a corresponding knife mount location. Each knife pin has a distal keeper with a double keyhole shape which generally approximates and is slightly smaller than the double keyhole shaped opening in each knife. A spring plate is positioned under the cutting disk adjacent to each distal keeper of each knife pin.

Abstract: A coupler comprising a shaft, an enlarged head, a proximal end of the shaft, and a journal for contacting and rotating in an annular bearing surface of a component for forming a pin connection with the component. In addition, the coupler includes a plurality of projecting fins projecting from the journal along axes generally parallel to the longitudinal axis of the shaft and are radially spaced around the journal.

Abstract: A rotary mowing implement including a rotary cutter bar disk, at least one hub, a blade element, a pin, and a pin retaining mechanism. The at least one hub is connected to the rotary cutter bar disk. The blade element has a hole therein. The pin couples the blade element to the hub. The pin is insertable through the hole and is removably coupled to the hub. The pin retaining mechanism couples the pin to the hub.

Abstract: A rotary mowing implement including a rotary cutter bar disk, at least one hub, a blade element, a pin, and a pin retaining mechanism. The at least one hub is connected to the rotary cutter bar disk. The blade element has a hole therein. The pin couples the blade element to the hub. The pin is insertable through the hole and is removably coupled to the hub. The pin retaining mechanism couples the pin to the hub.

Abstract: A cutting blade assembly (8) for a rotary mower. The assembly (8) comprises a blade carrier (1) and four swing-back cutting blades (10) (only one of which is shown). The blade carrier (1) has a substantially planar discoid body (2), a mount (3) for mounting the body (2) to a drive shaft assembly (not shown) of the mower, four airflow passages (5) extending through the body (2), and a blade connecting mechanism (6) for connecting the blades (10) to the body (2). The body (2) is made of laser- or plasma-cut, high-strength steel (Bisplate 80™) having a thickness in the order of 5 to 6 mm.

Abstract: A scraper device for connection to the knife connector in a rotary cutterhead and for rotation therewith that prevents debris from accumulating in the space between the knife and the cutterhead housing and which also dislodges accumulated debris from areas adjacent to the space between the knife and the cutterhead housing.

Abstract: Blades with multiple inclined cutting wings are applied on any rotating support. The inclination of the cutting wings or arms of the blade are carried out on the X axis with an angle that varies from 5° to 60° with regards to the frontal support. The inclination is produced by following the rotating direction. The blades are equipped with wedge-shaped upper cutting winglets which have a function of grass grinders and/or with wedge-shaped lower cutting winglets which have a function of airing and breaking grass into little pieces. These blades are produced in one single piece, or placed one upon the other or divided/split, in metal, in plastic or compound material, to be used for the cutting of a lawn.

Abstract: A lawn mower blade assembly for a rotatable driveshaft includes a blade mount to be secured to the rotatable driveshaft and a cutting blade removably coupled to the blade mount and defining therewith a blade base unit having at least one wedge surface thereon. At least one sliding retainer removably couples the cutting blade to the blade mount and is slidably movable between a locked position and a released position. The at least one sliding retainer has at least one wedge surface thereon cooperating with the at least one wedge surface of the blade base unit to securely couple the cutting blade to the blade mount when in the locked position.

Abstract: A lawn mower blade assembly for a rotatable driveshaft includes a blade mount to be secured to the rotatable driveshaft and having at least one wedge surface thereon. A cutting blade is removably coupled to the blade mount. At least one sliding retainer removably couples the cutting blade to the blade mount and is slidably movable between a locked position and a released position. The at least one sliding retainer has at least one wedge surface thereon cooperating with the at least one wedge surface of the blade mount to securely couple the cutting blade to the blade mount when in the locked position.

Abstract: An improved rotary cutting blade assembly which is characterized by reduced friction and enhanced cutting efficiency is disclosed. The improved rotary cutting blade includes a rotary cutting blade having a blade hub, a plurality of blade arms extending outwardly from the blade hub and a plurality of blade winglets carried by the plurality of blade arms, respectively.

Abstract: A high-lift mower is disclosed. The mower includes a frame, at least two wheels disposed along opposite sides of the frame and having a space between them, and a blade rotation mechanism, mounted to the frame, for providing a rotational force relative to the frame. A blade assembly is coupled to the blade rotation means. The blade assembly comprises a plurality of cutting blades. Each of the plurality of blades includes a front face having a cutting blade and a rear face disposed away from the front face. The rear face has a lift portion. A roller assembly is adjustably coupled to the frame for, upon engagement with a surface located in the space between the pair of wheels, maintaining the blade assembly a predetermined distance above the surface. A blade assembly and a roller assembly for use with the high-lift mower are also disclosed.

Abstract: A cutting blade apparatus includes a blade and a replaceable cutting edge component that is removably engageable with the blade. The cutting blade apparatus may be used in a variety of cutting applications, and in some embodiments may be useful in rotary lawn mower applications. The replaceable cutting edge components may present a profile useful in vegetation mowing and mulching applications. The cutting blade apparatus of the present invention facilitates the maintenance of high-quality cutting edges without the need to disassemble the blade from its mounting.

Abstract: Mowing device for plants, comprising at least one rotor with a rotor axis, in particular a vertical rotor axis or first rotation axis, and at least one blade which is driven in rotation by the rotor, in which the blade is attached to a blade holder, which is attached to the rotor so as to be rotatable about a second rotation axis which is situated at a radial distance from the rotor axis.

Abstract: A blade bolt for attaching a blade to a rotating member of a rotary mower has a head at a lower end, a cylindrical shoulder portion extending from the head, a shank extending from the shoulder portion, the shank having a cross-section that is rounded and non-cylindrical, and a threaded portion extending from the shank. The shoulder portion extends laterally beyond at least a portion of the shank such that the shoulder portion bears against the rotating member when the shank is inserted into a mounting aperture defined by the mounting member that has a shape corresponding to the cross-section of the shank. The rounded and non-cylindrical shank prevents rotation of the bolt, and distributes stress forces across a wider area compared to the prior art.

Abstract: A mower, edging, and trimmer cutting device or blade designed for improved durability, performance, and safety. The blade is molded of flexible material composed of synthetic engineered urethane polymer, a polyamide or other resilient mesh bonded to or embedded in the blade for a cutting material to provide a cutting edge, and a metal or other high-durometer support member embedded in the blade. The size of the mesh may be coextensive with that of the blade and the fabric is positioned to intersect the cutting edges of the blade.

Abstract: A mower blade locking joint for fastening and securing a rotary cutting blade to a vertically aligned spindle driven by an engine. The spindle extends below a mower deck. The blade has a pair of opposing cutting ends and a mounting hole between the cutting ends. The joint includes a threaded section, a lobed section, and a collar. At least one of the spindle and the mounting hole have seven lobes. The lobes have continuous radii, an inner or minor diameter, and an outer or major diameter. The outwardly directed lobes have the same dimensions as the inwardly directed lobes, and both the spindle and the blade have the same cross sectional or surface area. The inner or minor diameters of the spindle and mounting hole are at least 75% of the major or outer diameters.

Abstract: Apparatuses and methods are provided for preventing damage to a lawnmower engine and crankshaft when the lawnmower cutting blade encounters an obstructive object. A cutting device for a lawnmower is provided and can include an elongate base member, at least one cutting element pivotably attached to the elongate base member, and a biasing mechanism that engages the cutting element and elongate base member. The at least one cutting element can include a blade portion and a drive engagement portion. The cutting element can pivot when the blade portion strikes an obstructive object such that the blade portion absorbs the impact and retracts to form a blunt shape to prevent damage to the cutting element. The pivoting of the cutting element causes the drive engagement portion to disengage from the crankshaft of the lawnmower to prevent damage thereto.

Abstract: A cutting blade assembly incorporating two lawnmower cutting blades and a holder configured to hold the lawnmower cutting blades in perpendicular orientation with respect to each other. The holder does not occupy any space on the lawnmower blade mounting shaft and results in less rotational inertia than conventional mounting hub designs.

Abstract: A cutting device configured to attach to a spindle of a mower. The cutting device includes at least two pivot-blades and a blade mounting assembly. The blade mounting assembly has an upper retaining plate, a lower retaining plate, and a mounting spacer positioned at least partially between the upper retaining plate and the lower retaining plate, wherein end portions of the pivot-blades are retained between the upper and lower retaining plates.

Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid

Abstract: This application discloses a method for separating banana clusters into individual fruits. In this method, the banana cluster is hung on a carrier (such as a cable) in such a way that the hanging point is the place where the banana fruit stalks converge (at the crown). The cluster and/or the cutter are moved toward each other and the cutter is positioned such that the cutter cuts the fruit stalks at a point lower than the cluster hanging point.

Abstract: The present invention is directed to a horizontal rotary cutting system and a method for using such system to cut plant material, such as crops and tall grasses. The axis of rotary motion of the cutting blade is essentially horizontal, i.e., or parallel to the ground and is essentially perpendicular to the longitudinal axis stalk of the plant material to be cut. The cutting blade has an elongated cutting surface that rotates perpendicularly toward, and passes through and cuts the plant material stalks. A cutting diameter of about two inches or less is used to achieve lower horsepower requirements, lower friction losses, and lower vibration of the system when compared to prior systems. High speeds of rotation of the cutting blade permit and facilitate the use of high ground speeds of the cutting system.

Abstract: A rotary lawn mower cutting blade with reduced drag and improved cutting ability includes a central mounting section, intermediate sections, and outboard sections along a common longitudinal axis and disposed about a common center of rotation. The outboard sections includes downward and inward projecting sections. The cutting blade also preferably includes cutting edges on the full extent of the leading edge of the outboard section including the downward and inward projecting sections. Additionally, the outer section can be twisted slightly to enhance airflow upward.

Abstract: A lawn mower having upper and lower cutter blades in a cutter housing is provided. The blades are disposed with a phase difference such that upper blade edge parts of the upper cutter blade are advanced forward with respect to lower blade edges of the lower cutter blade in the rotation direction, whereby interference of the upper cutter blade with the air-lifting parts of the lower cutter blade is avoided, and the noise produced by the rotation of the upper and lower cutter blades is reduced.

Abstract: In an embodiment, a spool for a trimmer head has a structure for guiding the trimmer line around a region for a driveshaft. In an embodiment, a component (e.g., a turn knob or a stop) is attached to the spool so that after determining the orientation in which to install the spool, the user is unlikely to install the spool in another orientation, even though the spool is invertible. In an embodiment, the turn knob also includes a structure that allows the turn knob to be used as a tool (e.g., as a wrench or screw driver) that facilitates disassembling the trimmer head.

Abstract: A rotary motor blade has rotational mounting structure in its body member to mount the blade to a power driven motor and thereby rotate the blade. The body member includes at least one free end extending outwardly of the mounting structure with the free end having a front leading edge and a rear trailing edge interconnected by a tip. At least a portion of the front leading edge is tapered to comprise a cutting edge. At least one and preferably a plurality of air flow deforming elements such as indentations are formed in the front leading edge and extend inwardly from the exposed outer surface of the front leading edge to disturb air flow along the rotating blade and enhance the creation of vortices which allow the flow to go from the front leading edge to the rear trailing edge.

Abstract: A cutting blade for a motor-driven implement is provided. The cutting blade has a main body having a central fastening opening and blade sections that extend approximately radially from the main body. The blade sections have edges that extend in a radial direction and form cutting edges. Each blade section is provided with at least one bead-like embossment having a longitudinal axis that extends at an angle of between 0 and 45° relative to a longitudinal direction of the blade section.

Abstract: A cutting device including a gearbox of an upper part, a lower part, and a front piece, the front piece having a thickness greater than the thickness of the upper part. At least one guide bearing is connected to the gearbox by assembly elements. At least one cutting member is connected to the gearbox by the guide bearing, the cutting member being driven in rotation during work about an upwardly directed axis. And, at least one assembly element is anchored in the front piece of increased thickness, attachment of the guide bearing being thus improved.

Abstract: A brush cutter blade for shredding of grasses, weeds, vines and brush and also for saw cutting of saplings and tree branches, comprising a circular saw blade member with auxiliary cutting elements projecting from the underside of the blade. Several preferred embodiments include semielliptic and rectangular structures and serrated and non-serrated cutting edges for the auxiliary cutting elements. All embodiments share outwardly sloped, substantially flat structures, circularly and symmetrically disposed, with centrally inclined base lines. This combination of structural features is enacted upon by centrifugal forces during rotation, to create an effective self-cleaning mechanism, whereby cutting debris is urged upward, outward and away from the auxiliary cutting elements.

Abstract: A modularized lawnmower replacement blade which can be can be attached to a standard lawnmower shaft. The modularized blade includes a central mounting hub with four recessed seats. In the preferred embodiment, a cutting blade is attached to each recessed seat so that the blades are positioned at a right-angled orientation with respect to each other.

Abstract: A mower blade includes a mid-section, two sharpened, end sections, and a blade longitudinal axis. The mid-section includes a circular, central hole having a relatively large diameter and being centered on the blade longitudinal axis and first and second slots centered on the blade longitudinal axis. Each of the first and second slots are positioned on opposite sides of the central hole. The mid-section also includes first and second circular, side holes positioned off the blade longitudinal axis and on opposite sides of the central hole. Each of the first and second side holes have a diameter that is smaller than the diameter of the central hole. The diameter of the central hole is larger than the width of each of the first and second slots.

Abstract: A cutting device, particularly a lawn mower, has at least one rotating knife mounted on a rotating, motor-driven knife carrier by a screwless, detachable connection. This connection is detachable by a relative rotation between the knife and the knife carrier. It is essential that the connection between the knife and its knife carrier be made by a centrally arranged bayonet lock and that this bayonet lock be locked in the closed position by an additional locking element.

Abstract: A head for a line trimming apparatus includes a body member and a detachable cover that may include a replaceable insert for connecting the head to a drive shaft of a line trimming apparatus. The body member includes opposed openings and a filament-receiving channel for inserting an elongated flexible cutting filament into the head for retention thereon. A spring-biased clamp is supported on the body member and is engageable with the filament portion residing in the channel to releasably retain the filament connected to the head. An actuator button projects through an opening in the body member and is operable to be pressed to cause the clamp to release forcible engagement with a filament so that the filament may be removed and replaced. In one embodiment the clamp and actuator are an integrally formed part and the filament projects through openings formed in spaced apart arms of the clamp member.

Abstract: A lawn mower blade assembly is described that comprising a generally flat, elongated blade having a central mounting opening for mounting of the blade to a rotating motor shaft of a lawn mower. The blade further includes a plurality of bit openings positioned along the blade, and a plurality of elongated, generally cylindrical bits for insertion into the bit openings. Each bit has a head and a plurality of rib protrusions located slightly away from the head at one end of the bit. Each bit is inserted into one of the bit openings from the bottom side of the blade, past the rib protrusions, and snapped into place against the head. As such, each bit is held in place in the bit opening by the rib protrusions and the head. The bit, once installed, each extend generally perpendicularly from the top surface of the blade.

Abstract: An improved mounting arrangement for a knife to a disc for use on a rotary disc cutter that eliminates the need for a threaded connector and the associated nut is disclosed. It also provides a positive retention method on the top side of the disc. In addition, it provides a method of removing the knife from the disc without the use of wrenches, simply requiring a tool for prying, such as a screw driver. A further feature is a low profile retainer that does not need to be protected by a wear protector.

Abstract: Mowing blades which include a one-piece member having a drive mechanism coupling section, a deformation section and a cutting section. When the mowing blades receive a particular load from an obstructing object, the deformation section deforms, dissipates energy and reduces damage to drive mechanisms of mowing machines.

Abstract: Attachable to a rotary lawnmower shaft is a body assembly of a rectangular shape having a removable and reversible blade on each end. The blades are easily and quickly removed, reversed, and replaced without tools. The blades are locked in position by a unique and simple locking device. During operation of the mower, the centrifugal force of the rotating body assembly further locks the blades in place for additional safety. When the body assembly is in rotation, the blades are designed to create air turbulence which causes the cut grass clippings to exit the lawnmower.

Abstract: A tool head for a motor-driven, manually guided implement for receiving a rotatable cutter tool is provided. The tool head comprises a housing in which is provided a tool shaft that is rotatably mounted via bearings. Secured on the tool shaft so as to turn with it is a tool carrying mechanism for the cutter tool. This tool carrying mechanism includes an engagement plate having an engagement surface, which is oriented perpendicular to the axis of the shaft, and a centering shoulder. The engagement plate and a centering element having the centering shoulder are embodied as separate components. The engagement plate is of light weight construction and is positively connected with the tool shaft. The centering element is made of a material, the hardness of which is adapted to the cutter tool.

Abstract: A rotary cutting deck has dual, side-by-side cutting chambers each of which houses a rotary cutting blade. The blades rotate so that grass clippings exit to the rear of the cutting deck through a central, rearwardly extending exit tunnel. A pivotal mulch door is located within the exit tunnel with the mulch door swinging between two positions. In one position, the exit tunnel is open to permit operation of the cutting deck in a discharge/collection mode of operation. In the other position, the exit tunnel is closed to convert the cutting deck to a mulching mode of operation. A V-shaped baffle with a forwardly facing apex is placed in the bottom and rear of the exit tunnel to enhance performance in the mulching mode of operation.

Abstract: A thatching attachment for a rotary power lawn mower that uses short lengths of nylon trimmer cord as bristles to thatch lawns by mounting the brushes on a blade. The device uses alternatives to bristles and new arrangements of the blades to better groom lawns overall. The new thatching elements work on all types of grasses and perform better than plain nylon bristles. Moreover, these thatching elements last longer and are, therefore, more economical. Finally, my new designs are better at mulching the cuttings, which reduces the amount of waste picked up by the mower. This saves time and cost of bagging and disposal of the waste.

Abstract: An improved mounting arrangement for a knife to a disc for use on a rotary disc cutter that eliminates the need for a threaded connector and the associated nut is disclosed. It also provides a positive retention method on the top side of the disc. In addition, it provides a method of removing the knife from the disc without the use of wrenches, simply requiring a tool for prying, such as a screw driver. A further feature is a low profile retainer does not need to be protected by a wear protector.

Abstract: A flexible cutting group consisting of a plate (1), supplied at the centre with a hole (2) for its fastening onto the rotating motorized group of the bush-cutter, and pieces of metal chain (4), intended to operate as cutting means; with said pieces of chain combined in a removable way to the plate (1) in symmetrical positions by appropriate fastening means (3).

Abstract: A rotary disc cutterhead knife mounting system uses a spring plate bolted to the underside of the cutterhead cover. A knife pin is attached also to the underside of the cover, adjacent the outer edge thereof, and extends downwardly therefrom. The knife has a mounting hole therethrough, slightly larger that the diameter of the knife pin. With the knife hole fitted on the knife pin, the spring plate compresses the knife toward the underside of the cover; holding the knife in operating position. A special tool is used to remove the knife by forcing the spring plate downward, freeing the knife.

Abstract: A rotary lawnmower attachment for providing blowing capability to a rotary lawnmower to assist in removing leaves and other debris through force of air generated by the rotary lawnmower blade includes fin members insertable into slots having open ends facing a center of the lawnmower blade. The fin members are positioned at each end of the lawnmower blade, extending upward and downward from the lawnmower blade, to increase air flow generated by rotation of the lawnmower blade.

Abstract: An improved mounting arrangement for a knife to a disc for use on a rotary disc cutter that eliminates the need for a threaded connector and the associated nut is disclosed. It also provides a positive retention method on the top side of the disc. In addition, it provides a method of removing the knife from the disc without the use of wrenches, simply requiring a tool for prying, such as a screw driver. A further feature is a low profile retainer that does not need to be protected by a wear protector.

Abstract: An apparatus for finely pulverizing lawn debris has a central drive shaft with a clutch driven by a gasoline or electrical power source. Lawn debris is drawn into a suction chamber by a fan impeller blade mounted on the central drive shaft. The fan impeller blade initiates pulverization of the debris. A grinding blade with a plurality of blade elements is mounted on the central drive shaft below the fan impeller blade and effects additional pulverization of the debris. A clutch is mounted next on the drive shaft followed by a distributing plate with a plurality of inclined apertures for dispensing a high velocity stream of the pulverized debris uniformly over a lawn from the rotating distributing plate. When the clutch is disengaged the distributing plate rotation is stopped and the finely pulverized garden debris is collected in a side collection chamber and is periodically emptied through a bottom discharge gate.

Abstract: A lawn mower blade having a thickness of approximately 0.075 inches comprises a main body, an elevational profile, and end portions equidistant from the center of the blade. The elevational profile consists of a raised portion that reaches a height at the plateau portion at the center of the blade. The elevational profile increases at an angle &agr; as the end portions approach the plateau. Each of the first and second end portions has a cutting edge portion. The height to blade thickness ratio is at least two-to-one. Further, since the mower blade is generally not heat treated, ribbing is added to the mower blade to provide strength.

Abstract: A mulching lawn mower blade assembly having replaceable inserts and mulching teeth. The mulching teeth may be located on the replaceable inserts or the mulching blade. A sickle insert is disclosed for use in tall grass. The mulching lawn mower blade assembly may include means for sand to flow over the mulching teeth in high sand areas.

Abstract: A harvester which uses a rotary style cutter bed has a series of rotary cutters extending across the path of travel of the machine and rotatable about individual upright axes. Part of the cutter bed is a flat gear case containing a train of intermeshed spur gears that serve to distribute power between the cutters above the gear train. Each end of the gear case has a hollow, gearless extension welded thereto which supports at least one additional outboard cutter that receives its driving power exteriorally of the gear case. One embodiment uses a mechanical drive to bring power to the upright shaft of the cutter having the first spur gear so that the cutters with gears receive all their power from the driven cutter.