Abstract: A light-weight, integrated, self-contained golf premium device to aid a golfer during a golf game comprising a generally rectangular two-piece case having a circular rotatable stroke counter, a retractable cleaning tool, a ball marker retainer and ball marker, an information display surface and an eyelet to secure the device to a key chain or golf bag. The two-piece case has a front and rear piece formed of a relatively rigid material which are fixedly secured to one another by conventional internal connecting elements. Each case piece has a generally planar wall with a peripheral edge, an upper and lower end, a first side and a second side. The peripheral edges of the front and rear pieces are adapted to cooperate with each other to form the eyelet and to form the case for holding the ball marker, the stroke counter and the retractable cleaning tool.

Abstract: A digging tooth for a bucket having a concave top surface and a convex bottom surface which intersect forming a forward cutting edge. Sidewalls connect the two surfaces and are concave having a moldboard shape. The rear portion of the tooth is provided with a mounting assembly for mounting it to a bucket. The bottom surface continuously diverges from the forward cutting edge to the rear portion; whereas the top surface first converges then diverges from the forward cutting edge to the rear portion.

Abstract: A cemented carbide tip for a cutter bit is rotationally symmetric about its longitudinal axis and has a socket in its rear end for brazing to a steel protrusion on a steel tool shank. The tip socket and an outer rearmost facing surface on the tip rear end have respective pluralities of first and second bumps thereon for spacing, centering and aligning the tip on the bit body to facilitate formation of a braze joint of a desired given cross-sectional thickness profile between the tip and bit body.

Abstract: A tooth point for earth working, particularly ripping, which includes a relatively elongated body having rearwardly projecting tongue and recess means which cooperate with complementary tongue and recess means on a ripper shank protector.

Abstract: A cemented carbide tip is provided with a socket for mounting onto the steel shank of a cutter bit. The socket has an annular convex surface therein extending from the earth engaging portion of the tip radially inwardly and forwardly. This convex surface is brazed to the forward end of a steel shank to form a cutter bit.

Abstract: A tillage point for attachment to an excavating or earthmoving apparatus includes a tapered point extending below its longitudinal axis and formed by a convex top surface and concave bottom surface when viewed in side elevation. A convex protuberance axially extending along the bottom surface, combined with the tapered point permits enhanced soil penetration with reduced drag and friction.

Abstract: A soil tilling machine comprising subsoil tilling members, known as subsoilers, which are drivable via a tractor's PTO around inclined upwardly directed axes. The subsoilers are each primarily constituted by a fowardly and downwardly inclined extending shaft. In front of the tilling members, coulter discs are arranged which cut trenches through which the subsoilers' shafts can move so that the subsoil is intensively worked and broken up while the surface of the soil is hardly disturbed. A roller wheel which controls the depth of the subsoilers is disposed to their rear. The subsoilers are supported by a frame which is hingedly attached to a frame portion having a rectangular trestle for coupling to a tractor's three-point hitch via a spring-loaded parallelogram arrangement which assists in permitting the subsoilers to lift automatically if they encounter obstructions.

Abstract: The present invention relates to a method of attaching a wear part to an earth-working tool and a thereto adapted wear part. Characteristic of the invention is that the parts are joined together by means of a press fit which in turn is blocked by means of pretensioned resilient locking means which when fitted in place continually act upon the parts in the direction of interconnection. The invention provides a play-free and reliable interconnection for the tool and wear part, which is also very easy to remove.

Abstract: The shovel for an excavator has teeth arranged at a distance apart from one another on its digging edge. The areas of the edge of the shovel between the teeth are equipped with caps that are relatively resistant to wear and are put on in such a manner that they can be replaced, and have a short hook-like projection which engages under the edge of the shovel and a long leg which fits over the edge of the shovel. Secured to the upper surface of the shovel between the teeth of the shovel are retaining pieces which can fit together with the legs of the caps when the caps are put onto the edge of the shovel and which cooperate with them in an interengaging manner to prevent the legs of the caps from being lifted off from the upper surface of the shovel. Detachable securing members hold the legs of the caps and the retaining pieces together in the direction in which they can be fit together.

Abstract: The invention is a new design for dipper teeth for bulldozer buckets, comprising a pair of teeth joined by a plate, each tooth having a flat, pointed front edge, longitudinal U-shaped slot at its rear end, and bolt means disposed through an opening in the top surface to hold the teeth in position on the bucket.

Abstract: This invention relates to a wear-parts system for earth-moving machines such as digger, loading, and mining machines. This wear-parts system consists of a holder (2, 23) and at least one protruding wear-part (8, 24) in the form of a tooth or similar fixed on the front of the holder (2, 23) by means of a wedge or other locking device (15, 16, 38).

Abstract: A soil cultivating implement comprises a hollow portion which rotatably supports a row of substantially vertical shafts, each shaft carrying a corresponding soil working member at its lower end. Each soil working member comprises a tine holder having two laterally extending limbs which are both curved rearwardly with respect to the intended direction of operative rotation thereof and define shallow U-shaped channels, the outer end of each limb being integrally provided with a corresponding tine carrying sleeve in which is snuggly and slidably received a relatively rigid tine composed of spring-type steel.

Abstract: An improved plow point such as used on a chisel plow has a forward tooth for breaking the soil. Wings extend outwardly and rearwardly of the tooth portion of the tool at a shallow angle. That is, the leading edges of the wings slope downwardly and slightly rearwardly from the tooth. After the tooth breaks the soil, the wings raise, twist and turn the broken deep soil. This lifting action provides aeration of the soil. The wings also bring up some deep soil and leave large chunks of soil that become mellow due to the freezing and thawing cycles during the winter. The outboard rear edge of each wing may be turned slightly downward which enhances the twisting motion of the soil. All of this is done without creating a plow sole.

Abstract: An attachment assembly for securing an excavation tooth in a row of closely spaced teeth on large earth excavating equipment. The assembly includes a nose piece, an excavation tooth and a securement pin. The nose piece has a base portion which is secured in a conventional manner to the shovel or dipper bucket of the excavation equipment, and a tapered extension for carrying the tooth. The tapered extension of the nose piece defines a recessed flat horizontal surface at the extended end thereof inwardly spaced from the lateral sides of the nose piece to define a horizontal stabilizing surface bordered by a vertical stabilizing wall. The tooth has a channel therein corresponding in configuration to the tapered extension of the nose piece so that the nose piece can fit thereover in a mating relationship.

Abstract: An earth engaging instrumentality is equipped with wedge-like surfaces for displacement of earthen material. Rollers are rearwardly offset from the leading edge of the instrumentality and have chordal segments projecting outwardly beyond the diverging surfaces of the instrumentality to displace earthen material and hence facilitate penetration of same. An open, roller receiving area of the instrumentality is shown as being of a non-uniform width to receive upper and lower rollers of different widths which rollers may be of different peripheral configuration.

Abstract: A vertical multi-axis cutter, comprising a plurality of knives mounted on axes of rotation that are vertical or somewhat inclined relative to the vertical, wherein said knives are arranged so that the cutting edge meets the circular path under an angle .alpha. other than zero relative to the tangential direction and preferably said angle .alpha. is of a value ranging between 15.degree. and 35.degree., said values being determined by the machine feeding rate and rotational speed of the rotating shaft carrying the knife.

Abstract: A ground penetrating tool for a farm implement shank has a pyramidal tooth provided with a pointed, leading apex and a socket in its trailing end that receives a mating, triangular tongue integral with an upwardly and rearwardly extending mount releasably secured to the shank. The trailing end of the tooth abuts shoulders on the mount to absorb the load on the tooth and further protect a fastener passing transversely through the tooth and tongue for releasably attaching the tooth to the mount.

Abstract: An excavating tooth including an adapter, a wear cap for the adapter and a point in which the point and adapter have primary cooperating stabilizing surfaces and in which the point and wear cap are equipped with inter-engaging flanges to provide secondary stabilizing surfaces.

Abstract: A rotary hoeing tool comprising a flat portion, or hoe-blade, furnished with a forward cutting edge and one or more teeth set apart, parallel with each other, interchangeable or otherwise and protruding downwards to the rear of the tool's cutting edge, designed to forestall compaction of the earth resulting from the action of the hoe-blade. The said flat portion or blade (4, 5 & 15) may be fixed direct to the flange (11) of the cultivator's rotor shaft (10) by way of a flat shank (2), or onto an L-shaped mounting connected to the flange (11) of the cultivator shaft (10). The teeth (6, 7, 8 or 22) may be incorporated directly into the flat portion or blade (4 or 5) part of the tool, or made fast to the L-shaped mounting independently of the actual hoe-blade.

Abstract: An earth clod pulverizing and earth smoothing implement (10) has rows of heavy, cast-iron, pointed teeth (14a-v) which are wedge-shaped in cross section with the cutting edges (42) of the wedges defining substantially vertical lines facing the forwardly direction. The implement further includes downwardly directed channel irons (16a-d) after each row of teeth, with each successive channel iron being mounted slightly lower than the one in front of it. The front leg (54) of each channel iron is shorter than the back leg (56). The implement (10) also includes downwardly directed side walls (18a and b), an upwardly flared front member (20) and a downwardly flared rear, smoothing, member (22). A channel iron (16e) having equal sides is mounted on the downwardly flared smoothing member (22). The teeth are spaced two feet apart in the rows, and the rows of teeth are spaced 14 inches apart.

Abstract: A cultivating implement has an elongated frame portion that mounts a row of soil working members, each of which rotates about an upwardly extending shaft and mounts a lower tine or tines. The lower shaft end preferably is a flattened horizontal part and can have a threaded stub shaft that extends through a central hole in a matching horizontal tine fastening portion. Alternatively, the tine can be hollow and bolted to one side of a carrier. Preferably, the inner side of the tine is concave and a recess formed. Alternatively, the entire soil working portion is conical and tapers downwardly. The diameter of the upper part is at least five fold that of the lower part and is, at the most, one-fifth the total length of the soil working portion.

Abstract: A cultivating implement has an elongated frame portion that mounts a row of rotors, each rotor having an upwardly extending shaft and a lower tine. The lower shaft end is a flattened horizontal part with a threaded stub shaft that extends through a central hole in a matching horizontal tine fastening portion. A nut secures the fastening portion to the shaft end part and the nut is surrounded by a space partly defined by side cheeks of the fastening portion. Preferably, the inner side of the tine is concave and the recess formed therein merges into the space. A lug of the fastening portion fits into a recess of the shaft part to further secure the tine to the shaft. The soil working portion tapers downwardly from a curved intermediate portion to a lower tip that can be replaced.

Abstract: The invention relates to a public works machine constituted by a frame, by moving members with which the said frame rests on the grounds, by a device for driving the said moving members and, by a wheel provided with teeth for penetration into the ground, which wheel is mounted to rotate about a horizontal and transversal axis, and is coupled to a device for driving it into rotation whilst being adapted to be held in one position wherein the distance between the axis of the said wheel and the ground is less than the distance separating said axis from the free end of a tooth, whereas a synchronizing mechanism holds substantially constant the ratio of the rotation speed of the wheel to the linear speed of the moving members.The profile of the active face of each tooth is an involute profile defined by the substantial lack of pressure exerted by said profile on the ground during the rotation of the wheel.The invention finds an application in the production of channeling machines.

Abstract: A detachable, self-sharpening digging shoe for deep tillage shanks is shaped, sized and disposed in a manner to provide the proper angle of attack and to minimize resistance to its movement through the soil such that the movement is not only smooth but incapable of creating that kind of soil turbulence which normally results in substantial wear on critical areas of the shoe and the shank.

Abstract: A soil working machine has elongated carriers that extend transverse to the direction of travel, one behind the other. Eccentric mechanisms are attached to each carrier to move tools depending from the carriers, back and forth in directions parallel to the direction of travel. The eccentrics have upper supports connected with resilient controls and lower supports of unequal lengths so that the tools work different paths. A front levelling member is connected to the frame via a parallelogram linkage and the rear carrier has a row of tines. A supporting roller is connected to the frame by arms each of which has two portions. The portions can be pivoted or slid towards and away from one another so that the roller is also moved towards and away from the carriers. Also, the arms with roller are vertically adjustable and fixable in position.

Abstract: A machine for cultivating the soil has a main transverse beam carrying a transverse tool shaft driven to drive wobble bearings on the tool shaft, thereby to oscillate a plurality of tool holders having lever arms guided for transverse swinging movement in the beam. The tool holders mount the tines directly in tapered bores in the tool holders. The tines are secured to the tool holders by bolts threaded into the upper ends of the tines and are provided with break sections, to protect the tool holders.

Abstract: A detachable impact tip (10) for an impact rock breaker (B) has a mounting socket (11) and an improved tooth (12) which has a rectangular base (13) abutting the socket (11), and a body (14) which is wedge-shaped in side elevation and generally spade-shaped in plan. The body (14) has smoothly rounded longitudinal margins (17), and an extremity (15) which forms a generally blunt edge smoothly rounded from top to bottom and gently convex from side to side, and smoothly curved forward margins (18) between generally triangular sides (14a) of the body (14) and said extremity (15).

Abstract: A soil stabilizer comprises a self-propelled vehicle, a rotor having soil-working teeth, and a motor for driving the rotor. The motor is reversible to drive the rotor in opposite directions. The rotor includes tooth holders, each having generally oppositely directed tapered sockets. A tooth is received in one of the sockets so as to project in the direction of rotation. The rotor can thus be effectively utilized in either direction of rotation. The sockets are coplanar and intersect so that the zone of intersection forms an interruption in the tapered engagement between the tooth and socket intermediate the ends thereof to compensate for manufacturing variations in the tapered fit.

Abstract: The individual tine is oval in cross section adjacent the base and gradually changes to a circular cross section at the distal end thereof. It is held in a flexible insert by means of lugs on each side adjacent the base and can be turned so that the wider portion of the oval faces the direction of travel whereupon the tine flexes readily or, the tine can be turned at right angles to the direction of travel thus presenting a much stiffer tine. The first position may be used upon relatively light crops and the second position upon relatively heavy crops.

Abstract: A rotary harrow has a row of soil working members that are driven to rotate about upwardly extending axes and work overlapping paths. Each member has spaced apart downwardly extending tines having lower soil working portions. A flat tool is fitted on each tine with a sleeve-like fastening portion that is releasably bolted to the soil working portion. The tools are planar and mounted to extend generally perpendicular to the member's axis of rotation to cut stubble and roots. Each tool has sides that surround the respective tool and the sides form cutting edges that meet at points, the rearmost point being located further from the tine than the foremost point. The tools of adjacent members are positioned at different levels to avoid fouling.

Abstract: A tooth for a rotary drilling tool, more particularly an earth drill especially adapted for drilling in rocky soils is described including a working or cutting portion and a retaining portion; said working portion having at least one longitudinal edge provided with a rib extending up to the cutting edge of the tooth in order to receive a tungsten carbide tip, the thickness of the web portion of said working portion of the tooth being smaller than that of said ribbed edge; said web being substantially bevelled in longitudinal section, the junction between at least one face of the retaining portion of the tooth and the working portion forming a transverse rib which defines a transverse shoulder designed to cooperate with the front side of a tooth carrier of said tool.

Abstract: A soil cultivating implement has elongated transverse carriers that mount tines and corresponding eccentric mechanisms that are driven by a common shaft to orbit the tines through circular paths. Each carrier is pivoted to the frame by arms and springs suspend the carriers from the frame. During operation, the tines are moved smoothly, up and down, and torsion affects on the carriers are reduced. The tines can be connected to the carriers by quick-release cotter pins or bolts.

Abstract: A cultivating implement has cultivating members that are driven to rotate about a first upwardly extending axis. Each cultivating member preferably has three working members, that are freely rotatable about respective second upwardly extending axes, and downwardly extending tines. The tines can be journalled for free rotation at the corners of a triangular plate-shaped support and can be mounted in pairs on a bracket that affords protection to the connection points of the tines. The tines can be strip-shaped with trailing lower operative portions.

Abstract: This invention consists of a device which is attached to the pavement ripper of a back-hoe machine in order to convert the ripper into a combined ripper and trench digger so that the ripping of the pavement and the subsequent digging of the trench is accomplished in a single operation. The device consists of a heavy steel plate which terminates into a sharp digging edge at one end thereof. This plate is bent to conform with the ripper edge of a standard back-hoe ripper, upon which it rests, and is held in position at one end by fitting into an undercut part of the ripper and by two spaced side walls attached to the underside of the upper plate. At this end it is also pinned or bolted to the ripper. At the digging end, this plate is provided with a wedge-shaped pocket in which is located the horn end of the ripper to provide additional attachment of the device to the ripper. The width of the upper plate determines the width of the trench to be cut.

Abstract: A cultivating implement has an elongated frame portion and soil working members journalled in the frame portion to rotate about upwardly extending axes. Each soil working member has a single downwardly extending tine that is spaced from a shaft that defines the corresponding axis of rotation. The upper ends of the shafts of the members are secured to pinion gears and the gears of neighboring shafts are meshed with one another so that a power take off connection to a central pinion drives all of the pinions and adjacent soil working members rotate in relatively opposite directions. The members are staggered in two straight transverse rows so that their axes of rotation are arranged at the corners of an imaginary zig-zag line when the implement is viewed in plan and the members of a leading row are rotated in common in a direction opposite from those members of a rear row. The tines of the members in each row are preferably orientated in the same direction.

Abstract: A tine mounting for a rotary harrow has an elongated support and a holder at each outer support end. Each holder has a configured vertical bore that tightly receives the fastening portion of a tine and a central bore that receives a rotary shaft. The mounting is preferably made of a single piece of forged or cast material with the forward side of each holder having an integral screen and a majority of the mass of the material. The support can have an inclined portion that projects from each side of the central bore. The vertical bores can taper upwardly and be multi-sided to conform to a tine fastening portion.

Abstract: A harrow attachment has side-by-side rotary soil-working members mounted on upright axes journalled in a frame. A delivery mechanism with an elongated hopper and agitators and/or other feeding mechanisms can be connected to be rotatable and driven by the power take off of the prime mover or transmission connections from a rotary roller pivotably secured on arms to the frame to trail the working members. The working members are rotors with tines or earth working portions formed by a single metal sheet material which has been bent over to form two downwardly extending blades with lower parts that are inclined rearwardly. The blades are twisted so that leading cutting edges work overlapping paths and a horizontal portion of the rotors is secured by breakable bolts to upright shafts.

Abstract: A soil-cultivating implement has soil-working members mounted for rotation about corresponding upwardly extending axes. A soil-working tool, preferably one or more tines, is connected to a support of the soil-working member by at least one quick release fastener. The tool or tine can be a torsioned spring steel strip or a rod that has a spring coil. Each tine can have one or more operative soil-contacting ends that are spaced apart from one another. When the operative ends are located one above the other, the soil-working member can work deep in the soil. The fastener can be a pin that extends horizontal and at right angles to the axis of rotation of the soil-working member so that the operative ends can pivot to some extend about the fastener. The ends of each tool or tine can extend in different directions from one another and tines in pairs can be mounted on the same support.

Abstract: A tine on a rotary harrow has an upper fastening portion and a lower soil working portion which portions meet at a junction. The fastening portion is tapered to be tightly held in a holder without turning and has an upper threaded end that receives a nut and a lower, multi-sided region that merges into a similar region at the top of the soil working portion. The junction has an enlarged cross-section that preferably is hexagonal and towards the lower tip of the soil working portion, the cross-section changes into a generally rectangular cross-section region. When placed in a holder, the junction is located at the lower end of the holder and the longitudinal axes of the two portions are angled to one another. Also, a rib is located at the leading side of the soil working portion and grooves are formed in the leading flat sides thereof. Grooves of lesser magnitude are formed in the trailing sides of the soil working portion relative to the direction of intended rotation.

Abstract: A cultivating machine has one or more working members that are driven to rotate about upwardly extending axes. Each working member is connected to a drive transmission to turn and, spaced apart soil working members mounted for free rotation about respective axes, are moved through the soil. At least two of the soil working members are different from one another and capable of workingthe soil in different ways. One member can be a group of tines that are freely rotatable about an upwardly extending axis and an adjacent member can be a disc that rotates about a horizontal axis. Each member includes a stub shaft that is journalled in a universal mount so that the members can be released and exchanged to meet varying soil conditions. The mount has a pivot connection and a setting device to retain the soil working member at various working angles. Also, the stud shaft is adjustable within a sleeve of the mount.

Abstract: A soil cultivating machine has soil working members that are driven about upwardly extending axes. Each working member has radial arms and a tined cultivating rotor is pivotably connected to the outer end of each arm. Each cultivating rotor is freely rotatable about an upwardly extending axis and an adjustment device can be set to vary the position of the cultivating rotor about the pivot connection to its corresponding arm to change the working positions of the tines. The cultivating rotor can use different tines depending on the condition of the ground being worked.

Abstract: A cultivating implement has side-by-side soil working members journalled in a hollow frame portion. Each member includes a support with hub that is connected to the lower end of a corresponding shaft. The shafts of the soil working members have meshed pinions on their upper ends that are housed in an upper chamber of the frame portion. The support and hub are housed substantially in their entireties within the frame portion and the lower side of each hub has apertured tags with pins that comprise quick release fastenings for downwardly extending tines.

Abstract: A cultivator or rotary harrow has rotatable soil working members with tines that are driven to rotate about upwardly extending axes. Each tine has a fastening portion that is secured to a support, and a lower soil working portion. In one embodiment, the center lines of the two portions substantially coincide. Alternatively, the lower part of the soil working portion can be an offset straight part that extends outwardly or the lower part can be curved outwardly with respect to the remainder of the soil working portion. The opposite sides of the lower part of the soil working portion gradually flattens and broadens towards the lowermost tip.

Abstract: A tine for use on rotary soil working members that are rotated about upwardly extending axes has a upper fastening portion joined to a lower soil working portion. Each of the portions has a longitudinal axis and one axis is preferably inclined to the other so that the soil working portion can be held in a trailing or a leading position. The soil working portion has a oval cross section region that merges into a polygonal cross section region towards the lower tip of the tine. The fastening portion has means for fastening the tine to support holders of a soil working member.

Abstract: A ground engaging element having slots extending therethrough and being positioned at preselected locations, being of preselected configuration, and terminating at preselected distances from a forward cutting edge of the element for controllably breaking away selected portions of the element in response to forces subjected on the element after the forward edge has been worn away a preselected amount.

Abstract: A cultivating machine has an elongated cultivating member that is rotatably mounted to turn about a horizontal axis that extends transverse to the direction of normal travel. A plurality of tined soil cultivating means is mounted on a support shaft of the member and that shaft defines the horizontal axis of rotation. Each cultivating means comprises a group of tines that is freely rotatable about a corresponding axis of rotation. The axes of rotation of the cultivating means non-perpendicularly intersect the shaft and are formed by stub shafts that are journalled on brackets fastened to the shaft. Upon rotation of the cultivating member about the shaft, the tines of successive cultivating means engage the ground and the cultivating means each rotate to work a broad path of soil. The group of tines extend at angles to the axis of rotation of each cultivating means and twos of the cultivating means are mounted in opposing pairs that are offset with respect to adjacent pairs.

Abstract: A rotary harrow or cultivator tine has an upper fastening portion that is tightly received in a holder. The fastening portion is integral with a lower soil working portion that terminates in a tip and the two portions are angled with respect to one another. The soil working portion has a generally round cross section for a part of its length that is tapered outwardly to form a leading rib with respect to the intended direction of rotation of the tine. In the lower region adjacent the tip, the cross section of the soil working portion becomes less round and can merge into a polygonal cross section region having grooves and flat sides.

Abstract: A rotary harrow has a plurality of soil working members each of which has a support and a central shaft that forms the axis of rotation of said member. Each support has a holder at each end thereof and a downwardly extending tine secured in each holder. The holder is preferably inclined so that its top is located further from the central shaft than its bottom and also leads in the direction of normal rotation relative to the holder bottom. The holders are sleeves with integral screens and the sleeves receive the fastening portions of tines. The holders together with the support form tine mountings configured to minimize damage from stones and other debris. The tine fastening portions are held inclined to the vertical as well as soil working portions which are bent first towards one another then away, so that the lower tine tips are located further from the shaft axis than are the corresponding fastening portions.

Abstract: A ripper of an earthworking apparatus includes a shank with a tapered, forwardly projecting lower end portion that has a blunt extremity, a detachable hollow shin protector which embraces the lower end portion of the shank, both to reinforce said lower end portion and to transfer some ripping forces to the upper portion of the shank which is stronger than the tapered lower end portion, and a one-piece detachable ripper tip which has a rearward mounting stub provided with spaced control surfaces that abut mating control surfaces on the shank and/or the shin protector to positively position the ripper tip and to transfer certain ripping forces through the shin protector to the upper portion of the shank.

Abstract: Disclosed herein is a soil aerating device including a frame, a hollow cylindrical drum supported from the frame for rotation about a horizontally extending axis and for folling travel along the surface of the ground or turf to be aerated. Fixedly mounted on the exterior of the drum in registry with respective apertures provided in the drum are a plurality of hollow core-forming tines which are arranged to act much like involute gear teeth, while cutting and removing a plug or core from the ground or turf as the drum is rolled over the surface thereof, and to leave a "rack-like" pattern of holes. Each tine includes a pair of generally V-shaped, opposed side walls having an apex located on or near a radial plane extending radially from the drum axis.