Abstract: A heavy-duty, long-life, light-weight, replaceable rotary cutter head accessory for attachment to a rotary member of a vegetation trimmer is provided by this invention. The invention is characterized by several novel construction features that give the head superior cutting performance. For example, its construction is of two cylindrical coaxially nested cup-like head members with several sets of symmetrical apertures about the rim for retaining extending cutter members. The head members are constructed of light weight and extremely durable plastic, namely ultra high molecular weight polyethylene which has long wearing qualities. With apertures located in the two separate rim members, the head may be adapted for either flexible cord or rigid cutting members. The rigid cutting members are 16 or 20 penny nails, which wear a long time before encountering excessive wear in the special plastic head members.

Abstract: A revolving blade skinning device and blade is described, in which a revolving blade is rotatably arranged between two covers, and wherein the revolving blade is embodied such that cutting edge areas with constant cutting edge radii alternate with notches. In accordance with the present invention it is provided that the notches are embodied V-shaped and as cutting edges, that they respectively take up an angle of 10.degree. to 20.degree. and the cutting edge areas respectively an angle of 25.degree. to 35.degree., and that furthermore the revolving blade projects past the covers in such a way, that in the process the cutting edge radius of the revolving blade is maximally greater by 1.5 mm than the covers.

Abstract: A bevelled edger blade has a base side attachable centrally to a conventional edger shaft. Ends of the base side having cutting edges are extended an equal distance in opposite directions from a blade axis at a central attachment orifice on the base side to vertical corners. An axial corner is positioned a select distance horizontally from the blade axis. Sloped edges of border channels of landscape areas are cut by cutting edges on angular sides intermediate the axial corner and the vertical corners on the three-sided edger blade as it is rotated by the conventional edger shaft. The angular sides can be straight for cutting straight slopes or arcuate for cutting arcuate slopes optionally. A blade brace can be positioned parallel to the base side between the angular sides. The vertical corners can be angled acutely for cutting landscape channels with acute angles between a straight surface and an opposite side.

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: An agricultural tool including a disc blade incorporating hard wear resistant inserts for attachment to an axial member of an agricultural tool for rotation through the soil. The disc blade includes parallel spaced flat round front and rear surfaces having a central cylindrical opening. The front surface tapers radially outwardly to the rear surface thereby defining a common outer rim having a knife edge. A plurality of notches are spaced circumferentially along the front surface of the disc blade and inwardly from the outer edge of the front surface of the disc blade. The notches are configured to receive a plurality of hard wear resistant inserts to provide improved wear resistance.

Abstract: A flexible flail trimmer for conventional trimming of grass, weeds and other vegetation and for edging of sidewalks includes a rotatable combined guide and guard having a depth gage for providing positive vertical indexing during an edging operation. A trimmer is further disclosed as having a rotatable guide and guard which may be selectively fixed in a nonrotatable position. In this nonrotatable position, a second, rear guard may be attached to provide protection to the operator during conventional trimming operations. In further aspects, trimmer guards are disclosed for stabilizing the rotating flail to provide a cleaner, more even cut when the trimmer is used in conventional trimming operations.

Abstract: A monofilament line for a rotating string trimmer has a main body portion of a generally circular configuration. One or more sharp longitudinal cutting edges are integrally formed with the main body portion and protrude from the main body portion at an angle selected to cause controlled flex and asymmetrical drag on the cutting element, as it is rotated by a rotating string trimmer. This causes a torsional rotation of the free end of the line as it is rotated; so that the main body portion of the cutting element first strikes the object to be cut, followed by contact with the sharp cutting edge. This configuration is selected to cause cleaner cuts of grass and the like, with less shredding of the cut ends of the grass blades. In addition, larger vegetation such as weeds and small stalky shrubs may be efficiently cut without abnormally high wear of the cutting line.

Abstract: An electric rotary razor including at least one outer cutter which has slits for whisker entry and at least one inner cutter having a plurality of cutter blades. Each one of the cutting blades is inclined in the rotational direction of the inner cutter and has a cutting edge surface at its upper end that slide on the bottom surface of the outer cutter. The cutting edge surface is thinner than the cutter blade or the cutter blade can have a recess beneath the cutting edge surface. Thus, sheared whiskers are prevented from sticking to the cutter blade of the inner cutter.

Abstract: My invention is a replacement head for string trimmers and includes a block, the block being constructed of metal or alloy having the characteristics of strength, rigidity and generally having a hardness to withstand the abuse received by the rotating element of a string trimmer. The block is preferably of a cylindrical shape being essentially a solid piece with a flat top and bottom, the top and bottom of the block having planes essentially parallel to each other. Cut into the top of the block is a counterbore which is internally threaded to be screwed onto the threaded sinaft of the string trimmer. At or near the bottom of the block are two channels, each passing through tile block, the channels being essentially in a stacked relationship mid generally extending perpendicularly to each other.

Abstract: A cutter blade has a body portion with a central attaching hole for removable attachment to an output end of a powered tool. The blade has a pair of oppositely extending ends with beveled cutting edges on their leading edges. The body and end portions of the blade are curved upwardly for increasing the efficiency in the cutting operation of the blade. It is preferred that the radius of curvature of the blade be approximately 30 inches and that the sharpening bevels on the leading edges extend from a point adjacent the mid point of the blade to the tips of the blade. The cutting edges are progressively narrower from the mid point to the tips for increased cutting efficiency and blade strength. The cutter blade also has clearance bevels on the lower surface thereof at the trailing edges of the end portions. These clearance bevels extend from an inner area of the body portion short of the mid point of the blade to the respective tips.

Abstract: An electric razor including a plurality of external and internal cutting members in which each external cutting member has slits and a plurality of concentric tracks formed in the back and each internal cutting member has a plurality of rows of cutting edges that can rotate in the concentric tracks of the external cutting member. The slits are formed so that imaginary lines extending towards the center of the internal cutting member do not intersect the center of the internal cutting member, and the cutting edges are at the ends of the arms that extend outwardly from the internal cutting member.

Abstract: A device intended for installation onto a rotary cord herbage trimmer to permit the trimmer to easily slide omnidirectionally upon the ground being serviced is comprised of a circular saucer-like disc having a downwardly convex bottom surface and an upwardly concave top surface. A straight mounting post is upwardly emergent from the center of the concave surface, and terminates in a threaded distal extremity.

Abstract: An angle gear drive for a portable lawn care implement including first and second housing portions molded to net shape. First and second housing portions support an input shaft having a bevel gear and an output shaft having a mating bevel gear. The assembled housing portions include annular ribs for locating and restraining the input and output shafts so that the bevel gears are securely enclosed in a sealed gear cavity. The gear cavity is sealed by an anaerobic sealant. Grease is supplied to the sealed gear cavity through an axial lubrication bore formed in the input shaft along the axis of the input shaft.

Abstract: A rotary brush and weed clearing blade for powered implements with a serrated disk and serrated axial elements projecting from one or both disk surfaces for multidirectional cutting and in-situ shredding. The axial cutting elements can be integral or separately mounted and provide efficient operation in blade work directions not possible with conventional blades. Recessed location of projecting cutting elements allows cutting depth calibration for powertrain protection. Staggered axial elements mounting results in a debris-clearing feature through centrifugal forces. Axially projecting cutting elements create a locating guide effect unique to the invention. Use of conventionally serrated cutting elements in new and unique applications transfers their inherent smoothness and yet aggressive efficiency, into this fully multidirectional blade.Design simplicity offers efficient manufacturing.

Abstract: A cutterhead for a string trimmer having a rotatable drive shaft is adapted to hold and meter a cutting filament during operational use thereof. The cutterhead includes a disc-like carrier fixedly connected to one end of the drive shaft to permit the carrier to rotate about a rotational axis. The carrier has a peripheral edge and a peripherally extending outer wall approximately perpendicular to the carrier along the peripheral edge. The outer wall defines a space for accommodating the cutting filament in the cutterhead and has a guide eyelet disposed therein to define a pass-through opening for guiding the filament from the space to the outside of the cutterhead where a segment of the filament extends radially outwardly from the outer wall to define a cutting plane when the drive shaft rotates. The guide eyelet is made of wear-resistant material and is adapted to the diameter of the cutting filament.

Abstract: A resistance spool (16) for holding lines (38,40) in a line trimmer head (10) is disclosed. The spool (16) has a rotatable main body (19) having lines (38,40) wound thereon. The wound lines (38,40) have free ends (42,44) which extend radially from the main body (19). Clamp portions (32,34,36), on the main body (19), restrain the free ends (42,44) of the lines (38,40). The clamp portions (32,34,36) restrain the free ends (42,44) so that the lines (38,40) do not unwind from the spool (16) when the main body (19) is not rotating at a sufficient speed and allows the free ends (42,44) of lines (38,40) to pay out from the spool (16) when the main body (19) is rotating at a sufficient speed. Preferably, the main body (19) includes a hub (20) and axially disposed flanges (22,24,26) extending radially outwardly from the hub (20). The flanges ( 22,24,26) cooperate with one another to pinch the line (38,40) such that the line (38,40) may not unravel during installation of the spool (16) within a line trimmer head (10).

Abstract: A power skinning knife having a single substantially disc shaped blade driven in continuous unidirectional rotary motion with a pair of blade shields on opposite sides of the blade covering most of the blade and exposing only a limited depth arcuate cutting region of the blade between the perimeter of the shield and the cutting edge. The blade is driven by a pneumatic motor that is geared to turn first and second toothed pulleys connected by a toothed belt. The blade may be circular or lobed and mounted concentrically or offset to provide either a smooth or pulsing cutting action. The tool may also include a wiping element which removes debris from the blade edge before it enters the tool housing and a steeling element which can be actuated by the operator's thumb while the tool is being used to sharpen the blade.

Abstract: A line head (10) for a rotary line trimmer uses a bail (16) to clasp a single length of cutting line (18). The head has a first and second side (12, 14). The first side (12) of the head (10) has a plurality of radial ridges extending radially from a central shaft engagement hub (20). The second side has several raised portions (44, 46, 48, 50) which define a first and second channel (17, 19). The bail (16) rotates between an open position to a closed position in the first channel. The second channel (19) is dimensioned to engage the cutting line. The bail (16) has a clasp means (16c) which removably engages a lip portion (42) when the bail is in the closed position. The bail (16) also has a central portion (16b) which overlays the second channel (19) when the bail is in the closed position.

Abstract: An agricultural tool including a disc blade incorporating hard wear resistant inserts for attachment to an axial member of an agricultural tool for rotation through the soil. The disc blade includes parallel spaced flat round front and rear surfaces having a central cylindrical opening. The front surface tapers radially outwardly to the rear surface thereby defining a common outer rim having a knife edge. A plurality of notches are spaced circumferentially along the front surface of the disc blade and inwardly from the outer edge of the front surface of the disc blade. The notches are configured to receive a plurality of hard wear resistant inserts to provide improved wear resistance.

Abstract: A cutting head for a cord-type mower driven by an engine is disclosed. The cutting head includes a rotor capable of rotating about an axis and a bobbin with a cord wound on it. The bobbin can rotate relatively to the rotor about the axis in the rotor. The cutting head includes two types of cord feeding systems. The first cord feeding system automatically feeds a cord in response to cord wear. The second cord feeding system feeds a cord in response to a manual tapping operation executed during driving of the cutting head. The second cord feeding system disconnects one of the bobbin and rotor from the engine in response to the tapping operation.

Abstract: A cutting head for a cord-type mower driven by an engine is disclosed. The cutting head includes a rotor capable of rotating about an axis and a bobbin with a cord wound on it. The bobbin can rotate relatively to the rotor about the axis in the rotor. The cutting head includes two types of cord feeding systems. The first cord feeding system automatically feeds a cord in response to cord wear. The second cord feeding system feeds a cord in response to a manual tapping operation executed during driving of the cutting head. The second cord feeding system disconnects one of the bobbin and rotor from the engine in response to the tapping operation.

Abstract: A cutting head for a cord-type mower driven by an engine is disclosed. The cutting head includes a rotor capable of rotating about an axis and a bobbin with a cord wound on it. The bobbin can rotate relatively to the rotor about the axis in the rotor. The cutting head includes two types of cord feeding systems. The first cord feeding system automatically feeds a cord in response to cord wear. The second cord feeding system feeds a cord in response to a manual tapping operation executed during driving of the cutting head. The second cord feeding system disconnects one of the bobbin and rotor from the engine in response to the tapping operation.

Abstract: An improved blade member is shown for the type of rotary lawn mower that includes a shroud supported on wheels for horizontally traversing the surface of a lawn, a rotatably driven shaft extending downwardly at the horizontal center of the shroud for rotatably driving a blade assembly, and an opening in the upper part of the shroud for the exit of cuttings from the lawn. The blade member has a central section of circular configuration whose periphery is concentric to a center balance point, means for securing the driving shaft to the member at the center balance point, and three blade arms which are symmetrically circumferentially spaced about the central section and extend radially outwardly therefrom. Each blade arm has its forward side sharpened to form a cutting edge and has a portion of its width adjacent its rearward side inclined upwardly to create an air lift for lifting cuttings toward the exit port.

Abstract: Apparatus for cutting vegetation with a rotatable head carrying a non-metallic cutting line extended into a cutting plane. As the line extension decreases from an established preset length an actuator in the head permits additional line to be extended automatically from a supply source within the head. The actuator imposes a back pressure against the line of magnitude correlated to the sensed pull tension wanting to extend the line outward of the head. After the cutting line length is extended to its restored original preset length, the actuator in response to the operational forces imposed thereon secures the cutting line against further extension until a subsequent decrease in line extension is incurred. In one embodiment an inertial drag brake is activated during the course of line feedout and is deactivated after the length of cutting line has been fully restored.

Abstract: A string trimmer provides a cutting head having a passage therethrough receiving a cutting element of fixed length. The cutting element includes a monofilament line and a resilient sleeve surrounds one end of the monofilament line. A rigid eyelet in one end of the resilient sleeve provides an external upset or abutment which cooperates with a shoulder or restriction in the passage to retain the cutting element in the passage during cutting. A groove in the periphery of the cutting head intersects the passage and provides a recess for wholly receiving the cutting element if the user positions the cutting head against an immovable obstacle.

Abstract: The invention relates to a cutter guard (13, 14) in clearing assemblies (1) provided with a cutter (3) mounted on a shaft (6) and rotatable by means of a motor (11), said shaft (6) being carried in a body (8), the guard comprising a hub section (13) provided in association with the cutter (3) and essentially coaxial with the shaft (6), the hub section (13) having a diameter which is less than the diameter of the rotatable cutter (3) and carrying a plurality of fixed arms (14) which extend outwards beyond the periphery of the cutter (3).

Abstract: A cutting implement employing a pair of rollers placed vertically one above the other, the rollers having sharpened edges that slightly overlap and touch each other at a selected position, forming a cutting point where they touch. When the rollers are rotated, the sharpened edges form a continuous cutting edge for cutting material such as most paper and plastics. The rollers are provided with a degree of toe-in in the direction of rotation to insure that they remain in contact with each other during the cutting process. The rollers are rotatably mounted to a stiff carrier to provide dimensionally predictable location of the rollers with respect to each other, and to insure the smooth flow of material through the rollers as the material is being cut.

Abstract: The invention is directed to a cutting filament for a vegetation cutter. The vegetation cutter includes a drive motor which sets the cutting filament in motion thereby producing noise. The cutting filament extends substantially radially outwardly because of the centrifugal force. The cutting filament reduces noise especially at high rotational speeds and thus also at high peripheral speeds. This is achieved in that the cutting filament is configured to have a cross section not having point symmetry. The cutting filament preferably has at least one slot and/or protrusion formed in the surface thereof to extend in the longitudinal direction. The slot and/or protrusion can, for example, be formed so as to follow a helical path with respect to the longitudinal axis of the filament or it can extend parallel to this axis.

Abstract: A tool for cutting an access hole in plasterboard which is mounted to a wall stud. The tool includes a housing portion, a plug or connector portion and a cutting element such as a screw which has a head and a threaded shank. The housing portion has an exit opening, an interior cavity which forms a seat for the head of the cutting portion and a bore which extends from the exit opening to the cavity. The shank of the screw extends freely through the bore and beyond the exit opening. The plug or connector portion of the tool is threaded into the housing and engages the head of the screw for fixing the screw relative to the housing and includes a shank for insertion into the jaw or chuck of a rotary drive mechanism for rotating the cutting element about its central longitudinal axis.

Abstract: Apparatus for cutting foliage having a rotating head and an annular ring mounted for independent rotation in the head. A cam follower is pivotally mounted in the ring and is guided along a circumferential camming surface formed in the head. The camming surface has spaced apart lobes located adjacent to stops. The free end of a supply line is passed over the cam follower and passed out of the ring to a predetermined cutting length. When the head is rotating at operational speed, the resultant centrifugal force of the follower and the line will hold the follower against the stop. If the line is worn or damaged the holding force is decreased and the follower is released and guided over the stop thus allowing the ring to turn relative to the head until the next stop is encountered. This causes a given amount of line to be played out to replenish the damaged or worn section.

Abstract: The invention relates to a blade-protecting device (13, 14) for cleaning units (1) being provided with a rotary cutter or blade (3) which is supported on a shaft (6) and which can be rotated by means of a motor (11). The shaft (6) is mounted in a body (8). The blade-protecting device (13, 14) comprises a hub part (13) having a diameter being smaller than the diameter or the largest dimension of the rotatable blade (3). This hub part (13) is arranged substantially coaxially with the shaft (6) adjacent the blade (3) and is freely rotatable relatively to the body (8). A number of fixed, substantially radially oriented arms (14) are rigidly attached to the hub part and extend past the periphery of the blade or of the circle described by the rotating blade, said arms (14) preferably being arranged in locations spaced equiangularly around the hub part.

Abstract: Appliance for scrub clearance, grass cutting or the like, with multiple lines as cutting elements, with a casing in two parts (51, 53) coupled together and containing at least one spool on which said lines are wound, comprising: devices (77A, 77B) for coupling and decoupling of said parts (51, 53); resilient devices (75) designed to maintain said coupling devices in the hold position; and, of one piece with one (53) of the said two parts, devices for effecting connection (80) between said part and said spool (81), whilst the other (51) of the said parts exhibits outlet bushes for the ends of the lines (F); an intermediate bowl-shaped component (99) designed to be coupled to the rotary drive hub (95); and quick-release coupling devices (100,112) for coupling up said intermediate component (99) and the casing (51, 53) of the appliance, to ensure that the appliance is firmly supported by and rotated with the intermediate component (99).

Abstract: The saw blade has a series of teeth which are formed with cutting elements which are spaced inwardly from an outer circumferential edge and have sides which extend outwardly from planar sides of the saw blade. The saw blade is designed to cut yieldable material without cutting the carrier medium which can be a conveyor belt or a caul. Cutting is achieved by pushing the blade into the yieldable material until a cutting element engages the material. Movement of the blade then causes the cutting element to cut the yieldable material until a full depth cut is accomplished. The conveyor belt or caul is not cut by the saw blade outer edge which acts like a smooth disk. The saw blade can include a wear strip positioned on the outer circumferential rim to lengthen the life of the saw blade and conveyor belt or caul.

Abstract: A line trimmer head 10 for a vegetation cutter having an automatic line feed mechanism which replenishes the line 19 as a result of changes in centrifugal force. The line trimmer head 10 comprises a reel housing 14 which rotates with a shaft 12. A spool 18 containing a supply of line 19 is located within the housing 14. An indexer cam 16 is journaled on the shaft 12 and is axially and rotatably shiftable with respect to the shaft 12. The indexer cam 16 is periodically axially shifted and rotated by a reduction in the centrifugal force applied by the line 19 to the spool 18. A spring 20 is provided to bias the indexer cam 16 axially relative to the housing 14 away from an interlocked posiiton. In the interlocked position, the indexer cam 16 and housing 14 are interlocked together so that the spool 18, indexer cam 16, housing 14 and shaft 12 rotate together.

Abstract: A grass trimmer having a cutting blade mounting head portion in which an output is disposed, and a cutting blade mounting member is provided for mounting a cutting blade. The output shaft has a relative rotation preventing engagement portion formed on a lower portion thereof, and a fitting centering portion formed on a portion of the output shaft which is immediately above and adjacent to the relative rotation preventing engagement portion. The cutting blade mounting member has a central hole extending therethrough, and the inner periphery of the central hole has a fitting portion and a coaxial engagement portion, both formed thereon, the fitting portion being capable of fitting on the relative rotation preventing engagement portion of the output shaft, and the coaxial engagement portion being engageable with the fitting centering portion of the output shaft.

Abstract: A circular tool assembly adapted to be fitted together and secured on a power-driven tool arbor includes first and second circular discs, the discs defining a medial arbor-receiving opening and peripheral portions. At least one of the discs defines an outer convex surface extending continuously between the medial opening and the peripheral portion, and the disc further defines an inner, concave surface extending continuously between the medial opening and the peripheral portion. The discs are adapted to be positioned on the arbor of the tool with a circular tool element, such as a chain saw circlet, positioned between and engaged by the peripheral portions of the discs to hold the element in position between the discs when the discs are forced toward each other along the arbor to tightly hold the tool element between the peripheral portions of the discs.

Abstract: A shield and structure for mounting the shield to a hand held grass trimmer is provided. The generally flat shield is perpendicularly mounted to a gear box extension which is carried coaxial with the drive shaft tube. Twisting and moment forces incurred by the shield when the trimmer is resting on the ground are reduced by mounting the shield to support the weight of the trimmer generally perpendicular to the length of the drive shaft tube. The mounting structure prevents sliding of the shield on the drive tube and provides multiple attaching members to prevent rotation of the shield on the drive tube.

Abstract: In its preferred form the present invention provides a tool for scarifying wallpaper, to create holes by which steam or water can get behind paper stuck to a wall and thereby assist in removing it. The tool includes a pair of sharp toothed wheels rotatably mounted at an angle to each other on a rolling or pivoting block, so that rolling or pivoting the block between two positions can alter the angle between the two wheels in relation to the wallpaper, to be appropriate for scarifying movement of the tool either backwards or forwards.

Abstract: A device for cutting vegetation has a housing rotatable about an axis, a rotatable spool within the housing storing a supply of flexible line having an end extending through an aperture in the housing into a cutting plane normal to the axis, and an arrangement for automatically letting out additional line by causing relative rotation between the spool and housing whenever the length of line extending into the cutting plane is less than a predetermined length. The automatic arrangement includes a series of angularly-spaced locking faces provided on the spool (or on a member connected thereto) or on the housing, and a balance bar pivotally mounted on the housing or on the spool with this balance bar having a member for engagement with the locking faces. The center of gravity of the balance bar is on the side of the pivot point opposite from the engagement member. In use, the balance of forces on the engagement member directs this member against the locking faces.

Abstract: An automatic line trimmer head 10 including a housing 11 containing a rotor 12 which controls rotation of a spool 16 relative to the housing in a stepwise fashion which is actuated by centrifugal force. Centrifugal force acts upon a radially expansible annular member 14 which is disposed between the housing 11 and the rotor 12. The spool 16 contains a supply of line 18 and is attached to the rotor 12 for rotation with the rotor. A shaft extends through the housing 10, rotor 12 and spool 16. The rotor 12 is biased by a helical spring 24 toward an upper plane of rotation. The radially expandable annular member 14 shifts the rotor 12 to a lower plane when centrifugal force expands the annular member 14. Teeth 54 extending radially outwardly from an outer edge 56 of a circular disk portion 50 of the rotor 12 contact an upper set of stop blocks when the circular disk portion 50 is in the upper plane. The teeth 54 contact a lower set of stop blocks 42 when the circular disk portion 50 is in the lower plane.

Abstract: A vegetation cutter has a power unit and a rotating cutting device defining a planar cutting circle. In a hand-held cutter the circle is disposed about an axis at an obtuse angle with respect to the structure held. In a non-hand-held unit the axis is not dependent on any relationship to the structure. For either of these categories, a guard is provided having a narrow elongate arcuate shape, the arc centered on the axis with radius substantially the same as the planar cutting circle and normally disposed below the planar cutting circle and in front of the cutting circle with respect to the forward movement of the cutter and the operator thereof. The guard has sufficient length to operatively support and guide the cutting device when the cutter is turned and operated with the planar cutting circle in vertical disposition as in edging. A mounting assembly is secured to both the structure and the guard and permits the guard to be pivotted from normal operative position to standby position.

Abstract: A multipurpose cutting device for use with power drives is disclosed. Specific and different blade configurations are provided on opposite sides of an elongated bar or a disk type support for performing different cutting functions. By securing one side of the elongated bar or disk to the end of a shaft, one function can be performed. By securing the other opposite side of the elongated bar or disk to the shaft a different function can be performed. By securing or using the elongated bar or disk at an angle to the material being cut both blade configurations can be used simultaneously to perform yet another function. The blades on the one side and the blades on the other side of the elongated bar or disk may each have the blade configuration facing in one direction of rotation of one shape and the configuration facing in the other direction of another shape for different cutting characteristics when the direction of rotation is reversed.

Abstract: An apparatus for holding a plurality of flexible cutting filaments having an angular cross-section for cutting grass and the like comprises a rotary member. The rotary member includes a hub for mounting the member to a drive shaft of a lawn mower or the like. The member includes a rim disposed around the hub. A disk secures the rim to the hub. The member includes at least a pair of passageways for securing at least one pair of flexible cutting filaments. The passageways are keyed to the cross-section of the cutting filaments and extend through the rim for permitting the filaments to be positioned within each respective passageway at a specific orientation. Each of the passageways extends through the rim at different elevations above the ground for permitting the cutting filaments to cut the grass at different heights.

Abstract: An improved casing for a flexible metal drive shaft or cable of the type used for transmitting power from an electric drive motor to the handpiece of a meat trimming knife. The drive shaft is rotatably mounted within the bore of a cylindrical sleeve formed of a dielectric plastic providing a low friction surface for the inner rotating metal shaft. A metal wire braid is formed about the outer surface of the plastic sleeve to increase the longitudinal stability of the casing. An outer covering of a plastic material, preferably a food grade PVC, covers the wire braid.

Abstract: A compact, light weight, structurally simplified bump-feed type cutting head for a flexible line trimmer is formed from only six components--a hollow cylindrical hub having an open lower end; an annular cover member releasably securable over the lower hub end; a threaded arbor press-fitted into the hub to secure it to the trimmer drive shaft for rotation therewith; a hollow tubular release button member slidably extended through the central cover member opening and axially movable between downwardly extended and upwardly retracted positions; a line storage spool rotatable carried by the release button member within the hub; and a cylindrically coiled compression spring captively retained within the release button and biasing it toward its downwardly extended position. During high speed rotation of the hub about its axis, an outer end portion of flexible line coiled on the spool and passing outwardly through a hub side aperture is whirled through a transverse cutting plane to trim adjacent vegetation.

Abstract: A string trimmer providing an incremental indexing of line when the head is stopped and started. The preferred embodiment of the string trimmer head includes a spool member within the body member, the spool member being coaxially positioned within the body member and being rotatable therewith. The spool member includes a grooved end face with a cam channel having at least one switchback and one arcuate segment. A connecting means attached to the body member includes a connector which runs within the cam channel. Upon starting the rotation, the connector runs along an arcuate segment of the cam channel (permitting relative rotation between the spool member and the body member thereby indexing a length of line) until contacting a switchback stopping point. The connector is biased to move along the switchback and resets along the switchback upon stopping of rotation.

Abstract: A tooth structure of a rotary saw blade includes a plurality of teeth arranged circumferentially on the peripheral portion of a disc-like base plate. Each of the teeth is trapezoidal in side view. The top surface of each of the teeth is generally rectangular or exposed to the outside, while the remaining surfaces are coated with ultra-hard abrasive grains.

Abstract: The invention is directed to a cutterhead for a rotatably-driven vegetation cutter apparatus defining a drive axis about which the cutterhead is rotatably driven. The cutterhead includes a housing adpated to be rotatably driven by the vegetation cutter apparatus about the drive axis and a spool carrying a flexible cutting filament wound thereon with the spool being rotatably journalled in the housing. An indexing device permits an incremental rotation of the spool relative to the housing to pay out incremental lengths of the cutting filament. The indexing device includes a blocking lever pivotally journalled in the housing. The blocking lever has a first lever arm having a switching arm formed thereon and a second lever arm has a redirecting element formed thereon for guiding the cutting filament over the blocking lever.

Abstract: An annular saw blade has a outer periphery with cutting or tearing members (15), an inner periphery or inner edge and an annular web portion (16) between the inner and outer peripheries. The saw blade (8) has at least one annular drive surface of a flexible, polymeric solid material (14), against which flexible drive surface a rotatable drive member (13) is intended to be pressed to effect the rotation of the saw blade about its center of rotation. An annular saw for this saw blade has at least one rotatable drive member (30) with projections (37) intended to be pressed into said flexible material of the saw blade.

Abstract: An apparatus for effecting precise slicing and division of various sheet-like food members, such as cake, pizza and the like. The apparatus includes a housing including a manually manipulatable drive gear positioned medially thereof, with the drive gear rotatable by use of a rotatable incrementally divided handle projecting orthogonally and upwardly relative to the housing, with a plurality of reciprocatable gear racks directed exteriorly of the housing through each opposed side thereof in cooperation with the gear to adjust spacing of cutting wheels, each mounted at a remote terminal end of each gear rack.