Abstract: The invention concerns itself with a hammermill, specifically for the fragmentation of metal car bodies, equipped with a shaft to which radially pointing rotor arms are attached, to the ends of which movable hammers are attached in the direction of the shaft rotation. The hammers are individually attached to the rotor arms, are U-shaped and embrace the end and sides of the rotor arms, thereby protecting the rotor arm ends and sides without requiring additional protective caps. On one of the preferred embodiments the positioning of the hammers is configured eccentrically so that an adjustment of the travel circle radii of the hammers is possible allowing greatly extended periods of operation of the hammermill.

Abstract: A hammer mill for batchwise operation has a mill housing having a perforated screening plate intended for discharging a fine fraction of the milling material. A coarse fraction of the milling material is emptied through an emptying flap. A supply shaft opens tangentially into the milling chamber. The supply shaft is closed by a movable closure wall. In order to maintain short consistent treatment times of the milling material and to precisely reproduce a specific degree of filling for the treatment space, the supply shaft is dimensioned such that it can receive more than a milling-chamber fill. The movable closure wall is displaceable back and forth between a raised standby position and a lowered operating position such that the milling material introduced into the supply shaft when the closure wall is raised is forced into the milling chamber and then held therein by the closure wall being displaced in the direction of the milling chamber.

Abstract: The present invention is directed to an apparatus and method for compacting and pulverizing waste and soil, including a mechanism for cutting wire, tubing, hoses, plastics, carpet, mattresses, and other like materials that tend to be present at landfill and other waste sites and that can interfere with the operation of a compacting and pulverizing apparatus. The mobile compactor, pulverizer and cutting method achieves superior performance in terms of increased compacting ability by using a plurality of compacting and pulverizing members that are mounted rotatably on a plurality of rods running parallel to a main shaft, which compacting and pulverizing members rotate about the main shaft during operation to compact and pulverize waste and soil and other materials.

Abstract: A hammermill-type shredding apparatus having a rotor assembly disposed in a housing, the rotor assembly including hammer elements of longer and shorter lengths mounted in an intersticed or alternating manner thereon, a grate having thicker and thinner portions in like alternating manner so as to accept longer length hammers adjacent the thinner portions of the grate and between the thicker portions of the grate, the housing further provided with a comb assembly having finger portions extending into the circle defined by the hammers when in operation, and further extending between the hammer elements so as to remove and prevent any undesirable materials accumulations.

Abstract: A hammermill including a main shaft rotatable about a main axis passing longitudinally through the main shaft. Connected to the main shaft and spaced longitudinally along the main axis are a plurality of substantially parallel plates. Pivotally mounted between the plates along pivot axes parallel to and spaced from the main axis are a plurality of free swinging hammers for crushing material. A plurality of sealing members are positioned along the pivot axes and compressed between the hammers and the plates.

Abstract: A disc type chipper/mulcher having multi-blade flails in which two or more blades are attached to a sleeve, and the blade/sleeve combination pivots about a post as a single unit. The flails are sharpenable and reversible, and can be mounted on the same side of the disc as the knives. The chipper/mulcher may also include disc mounted fan blades and a screen for governing the size of the processed materials.

Abstract: The invention concerns itself with a hammermill, specifically for the fragmentation of metal car bodies, equipped with a shaft to which radially pointing rotor arms are attached, to the ends of which movable hammers are attached in the direction of the shaft rotation. The hammers are individually attached to the rotor arms, are U-shaped and embrace the end and sides of the rotor arms, thereby protecting the rotor arm ends and sides without requiring additional protective caps. On one of the preferred embodiments the positioning of the hammers is configured eccentrically so that an adjustment of the travel circle radii of the hammers is possible allowing greatly extended periods of operation of the hammermill.

Abstract: An apparatus for the treatment of medical waste, including solid and non-solid materials, permits the collection of such medical waste at the point and at the time of its generation in a solid container. The contained medical waste can be subsequently transported for pulverization, decontamination and safe disposal. A separate portable processing chamber, with an integral means to treat medical waste, can be used at locations remote from its power unit for the collection of medical waste and then moved to the location of the power unit to drive the waste-treatment means within the chamber.

Abstract: A varying tapered conical shell is provided with a varying taper conical rotor having pinlike radially extending projections whereby the varying taper assures more uniform solids distribution in a fluffing solids/gas contactor.

Abstract: A hammermill includes a pair of rotors to each of which are attached a plurality of relatively long and relatively short hammers. In one embodiment each long hammer on one rotor is arrayed opposite a short hammer on the other rotor such that, as the rotors rotate, a circular path described by an end of each long hammer is in close proximity to a circular path described by an end of a corresponding short hammer on the other rotor. The long hammers are interleaved and a plurality of impact plates are shaped and positioned in close proximity to the hammer circular tip paths so that materials being reduced by the hammermill impact the impact plates until the materials are reduced to a desired size. The inventive hammermill is particularly effective in reducing tough and pliable materials such as automobile tires as well as light materials such as paper and aluminum cans.

Abstract: A straw or chaff chopper attachment for a combine has at least one delivery funnel which can be fixed in place on the outlet hood of the combine, a cup-shaped rotor housing disposed under the delivery funnel, and an ejection chute connected with the rotor housing. The cup-shaped rotor housing is disposed underneath the delivery funnel and is capable of being pivoted back and forth around a vertical pivot axis (6) on a shaft (7). A chopping and ejection unit (8) disposed in the cup-shaped rotor housing (4), which rotates around the shaft (7), which extends coaxially with the vertical pivot axis (6) and chops the material and ejects it at the same time. A pair of the delivery funnels may be coupled for axial rotation about respective vertical pivot axes such that their respective ejection chutes move together.

Abstract: This invention relates to an apparatus for comminuting rock and other material and, in particular, to a rotary driven blade apparatus which comminutes rock, drilling materials and other material by impact rather than by grinding or crushing. More particularly, the invention creates a comminution environment which maximizes the establishment of a clear trajectory for the material between the orbit of each spinning blade and a single breaker bar.

Abstract: An apparatus for the treatment of medical waste, including solid and non-solid materials, permits the collection of such medical waste at the point and at the time of its generation in a solid container. The contained medical waste can be subsequently transported for pulverization, decontamination and safe disposal. A separate portable processing chamber, with an integral means to treat medical waste, can be used at locations remote from its power unit for the collection of medical waste and then moved to the location of the power unit to drive the waste-treatment means within the chamber.

Abstract: A free-swinging cutter element for a timber thinning machine includes a generally stirrup-shaped member having an outer wall and integral side walls. Each half of the member is formed as the frustrum of a triangle so that bevels on the upper and lower surfaces form sharp cutting edges that incline to respective upper and lower points in the center of the outer wall. This construction moves the center of mass further outward toward the outer wall to increase chipping and cutting efficiency, which is further increased by the form of the cutting edges. A single edged cutter having similar overall shape also is provided.

Abstract: A hammer for mounting to and rotary movement by a rotor of a material reducing machine. The hammer is mounted at a first end portion thereof for free pivotal movement about an axis parallel to the axis of rotation of the rotor. A material engaging tooth extends radially outwardly from the second end portion thereof. In a preferred embodiment, the tooth is a rotary conical bit.

Abstract: A metal shredding machine includes spaced apart support plates which are interconnected by rods carrying hammers. The hammers contact and shred metal which is passing through the machine. Sleeves are mounted on the peripheral edges of the plates. The sleeves reduce the frequency of breakage and replacement of the support plates.

Abstract: The hammers provide multiple impact points for debris, by providing impact points via tips at different radii from the axis of rotation of the hammer mill. The tips preferably are at substantially the same radius from the axis of rotation of the hammer about the hammer support shaft, so that efficiency is maintained even as the hammers lay back. The multiple impact points produce a more effective result, by partially sizing the debris on initial impact, before more precise final sizing in the grinding chamber. Angled surfaces on the hammer tips provide more effective shearing and tearing action than with conventional bar hammers. Wear patterns are such that grinding efficiency as the hammers wear down is maintained throughout the life of the replaceable tips. Preferably, the hammers weigh substantially more than conventional hammers, to provide a higher energy impact, and to reduce the tendency of the hammers to lay back.

Abstract: An improved pulverizing and grinding hammer and methods of making and using such a hammer in a hammer mill are disclosed. The improved hammer has a substantially trapezoidal insert made of a hard metal such as STELLITE 12 that is brazed onto a groove in a conventional hammer to form a contact face having an approximately ten degree layback angle with the vertical. The improved hammer provides a clear visible boundary between the insert material and base metal of the hammer, which acts as a wear indicator when the layback angle wears to approximately 40 to 50 degrees, the critical angle at which the size reduction efficiency of the mill decreases.

Abstract: A mill for shredding objects by rotating hammers. Each hammer has two heads and is mounted to rotate on its central axis. Thus both heads are operative for shredding without stopping the machine.

Abstract: An opening device for opening bagged refuse to liberate the contents of the bag, in which garbage bags are transported along a conveyor, and a plurality of endless chains having tines attached thereto are operated above the conveyor. As bags pass under the endless chains, tines extending downwardly from the chains pierce the garbage bags. Adjacent chains are operated at different speeds, and the tines move at different speeds relative to the conveyor, tearing the bags, liberating the refuse.

Abstract: The invention is a waste processor which incorporates the advantages of the chipper knife holder 100, swing hammers 50 and hog 120. A swing hammer 54 is used, providing for the use of all the kinetic energy stored in the swing hammers 54 together with good material contact. The swing hammer 54 profile is designed to spread the impact force over a large area, thus increasing the life of the swing hammer 54. If necessary, the swing hammers 50 can be locked to the rotating disc assembly 18, preventing their contacting any material. Hog hammers 120 are placed immediately behind the swing hammers 50. The position of the hog hammers 120 is such that they provide room for the swing hammers 50 to recoil, but are close enough to impact the material in approximately the same place as the swing hammers 50. The hog hammers 120 use the much larger amount of kinetic energy that is stored in the rotating disc assembly 18.

Abstract: A compact medical waste disposal device, operable without water or other processing, disposal or disinfecting fluid or solution, for pulverizing Sharps into medically acceptably safe small particles, and directing the particles into a disposable container. The disposal device comprises a waste receiving and pulverizing chamber containing a pulverizing disc blade, with the disc blade being operable only when the pulverizing chamber is sealed. The pulverizing disc grinds the medical waste against the inner surface of a closely adjacent liner of the pulverizing chamber. Relatively heavy elements, rotatably swing on the upper surface of the pulverizing disc to direct medical waste materials and fragments, towards the pulverizing interface between disc and liner.

Abstract: A rotor for use in an impact crusher or in a hammer mill is assembled of two or more coaxial metallic discs having neighboring hubs and axially spaced apart radially outermost portions which define annular clearances for introduction of a welding implement. Such implement is used to apply annular welded seams which bond the ends of the hubs to each other. The welded seams are provided at the peripheral surfaces of the hubs. The hubs are mechanically coupled to each other by bolts prior to making of the welded seams. The radially outermost portions of the discs are thereupon connected with hammers or beater bars, depending on the intended use of the rotor.

Abstract: A rotor (1) for impact or hammer mills is formed out of several rotor disks (1) made of cast steel and welded together, where the rotor disks exhibit hubs (3) contacting each other at annular sections representing the longest extension of the rotors in an axial direction. The rotor disks are connected to each other by annular weld seams at the hubs. According to a further embodiment of this rotor, the turn-outs (17), furnished for the weld seams (9) at the front faces of the hubs (3), extend from the outer edges over a substantial part of the radial thickness of the hubs, and the weld seam grooves (16), formed by the turn-outs of the neighboring rotor disks, are filled with welding materials.

Abstract: Apparatus for reducing material in which a rotor is formed with a plurality of material impact hammers and fan elements mounted on the rotor for simultaneously reduced material upon impact and moving the reduced material through the rotor, and a housing encloses the rotor between a material inlet and a reduced material outlet with the fan elements preventing reduced material bypassing the outlet to return to the inlet.

Abstract: A hammermill is presented which includes a plurality of hammers each presenting an arcuate striking profile. The hammermill includes a rotor having rods for swingable carrying the hammers thereon and a motor for rotating the rotor. The hammers are longitudinally spaced along the rotor and preferably helically arrayed thereabout. The hammers present a head and a body, the head having an arcuate striking face which may include a point. As the rotor turns, the hammers are free to swing on the rods and comminute material fed into the hammermill. The hammers preferably present symmetrical striking profiles whereby after one profile becomes worn, the position of the hammer on the rod may be reversed to increase the useful life thereof.

Abstract: A hammermill (10) comprises a casing (12) having a longitudinal axis (18) and a sidewall (20) such that an enclosed grinding space (24) is defined within the casing. A rotor assembly (26) is situated within the casing for rotation about the axis, and includes hammer elements each having a radially outer tip (34) which defines a hammer rotation diameter. At least one grinding plate at the inside of the sidewall defines a grinding surface (38) in the grinding space having a radius of curvature centered on the axis, a length dimension parallel to the axis, and a width dimension defined by an arc about the axis. The grinding plate has a plurality of spaced apart edges such that each hammer tip (34) passes along the width dimension of the grinding plate with a clearance from the edges which defines a grinding gap. The sidewall other than at the grinding plate has a non-uniform curvature which defines a non-uniform clearance from the hammer rotation diameter that is greater than the grinding gap clearance.

Abstract: A processor can chip and shred vegetation including wood and one or more of various other materials such as agricultural products, yard and garden debris, or forestry brush and waste. This processor has a housing with a hopper opening. Also included is a rotor that is rotatably mounted in the housing and has a non-uniform radial dimension. The processor has a drive means that is adapted to drive the rotor. A cutter is mounted on the rotor to swing past the hopper opening. A hopper is mounted at the hopper opening on the housing for feeding the material toward and past the cutter. The processor also has at least one flail mounted alongside the rotor to rotate relative thereto in a full circle. The flails interdigitate with the fixed cutter mounted on the inside of the rotor housing at the periphery of the rotor.

Abstract: A method for recycling waste plastic material, from polymeric film or hydropulper waste, including plastic and cellulosic fiber or organic contaminants. The method includes the steps of introducing the waste plastic material into a size reduction unit, and reducing the size of the waste plastic material to particles having a maximum dimension ranging between about 1 inch and about 8 inches; mechanically hammering and rubbing the plastic material for separating a portion of the cellulosic fiber from the plastic; separating another portion of the cellulosic fiber from the plastic by flotation with agitation; further reducing the particle size of the plastic to a maximum dimension of about 1/2inch; dewatering the plastic; drying the plastic to a moisture content of less than about 10 weight percent; and rolling the plastic into pellets.

Abstract: Pulverizing apparatus, known as hammer mills, for crushing rocks, etcetera, are known, which use swinging hammers, pivotally mounted on a rotating axis within a casing. The present invention provides a crushing apparatus comprising a housing with first and second cylindrical chambers, the first chamber having an inlet for input of material to be crushed, and the second chamber having an outlet for expulsion of crushed material. An axle is mounted for rotation in the housing and provided with means for rotating the axle. Hammers are mounted for rotation in the first chamber. Blades are mounted for rotation in the second chamber and have a flat surface for moving air in the second chamber. A flywheel is mounted for rotation on the rotating axle and forms a central wall between the first and second chamber while being adapted to leave a clearance between the first and second chamber sufficient for movement of crushed particles.

Abstract: A two-piece hammer for use in a shredder comprises a work engaging piece made from a hard, wear resistant material and a supporting piece made from a softer, relatively ductile material having a relatively high tensile strength. The two pieces are secured together by a removable fastener, with a resilient member being interposed between the work engaging piece and a supporting flange of the supporting piece to dampen the transmission of impact forces from the work engaging piece to the supporting piece. The supporting piece comprises an aperture which is adapted to receive a support pin of the shredder when the hammer is mounted in the shredder.

Abstract: A rotary agricultural tool which may be incorporated in a number of different types of agricultural equipment, such as in a device for chopping up bulk material is disclosed. The rotary tool has an elongate cutter body mounted in a frame for rotation about a substantially horizontal axis and carrying on its outer periphery pivotally mounted cutter blades, a housing extending partly around the cutter body, and feed rollers for feeding the bulk material to the cutter body. The blades are arranged in pairs of blades.

Abstract: A fiberizer is described having a rotor to which plural hammers are mounted for fiberizing a sheet of fibers delivered to the rotor as the rotor is rotated. A feed mechanism utilizing a pair of seal rollers, at least one of which is driven, is configured for effective delivery of both wet or dry sheets to the fiberizer. The hammers are configured to minimize dead spaces within the fiberizer. In addition, air flow is directed through the fiberizer to minimize accumulations of fibers therein. Furthermore, an optional liquid flushing mechanism is provided for periodically cleaning the fiberizer during use.

Abstract: An apparatus for shredding debris from lawns and trees, such as twigs, leaves and like material has a housing in which a rotor is rotatably mounted about an upright axis. The plane of the rotor is thus generally horizontal and supported on a frame which permits movement across the ground. A vertical shaft engine is mounted on the upper side of the housing and supports the rotor within the housing cavity. The rotor has blades which generate an air flow as the rotor is rotating, to provide a vacuum in the center portions of the rotor. The vacuum draws material through a central opening in the bottom of the housing, and the blades impel the material outwardly toward pivotally mounted shredder blades at the outer periphery of the rotor. The rotor also mounts chipper blades in an upper surface thereof with an upwardly extending guide chute receiving limbs and guiding such limbs into the path of the chipper blades as the rotor is rotated, to chip branches, limbs and the like.

Abstract: An improved pivot pin which allows individual pin connection of each hammer in the rotor of a shredder is disclosed. The pivot pin includes male and female pin members which interengage in a tight fit so as to function as a single pin when fitted together. A bore extends through both of the male and female pin members, with the bore through the female pin member being threaded. A securing device such as a socket head capscrew passes through the male pin member from the outer to the inner end portion thereof and is threadedly received in the female pin member.

Abstract: A debris conveyor for removing limbs, bark and other debris from between a tree stripping apparatus and a tree chipping apparatus defines a path between the stripper and chipper and comprises a conveyor extending under the path for conveying debris away from between the stripper and chipper. In one aspect of the invention, the conveyor is provided with wheels and a frame adapted for trailering. In one embodiment of the invention, the conveyor includes a power source for powering the conveyor. In an alternative embodiment, the conveyor is adapted for connection with the power source from one of the stripper and the chipper. The stripper incluldes, in one embodiment a serpentine drive system for controlling stripping elements.

Abstract: A protective shield for a hammer-crusher rotor protects at least the circumferential surfaces of disks attached to and rotating with a rotor shaft. In the spacing between neighboring disks, at least one hammer is tiltably or pivotally supported on an axle rod extending at a radial spacing from the shaft through the disks. Each protective shield is formed by at least one filler body made of an especially wear resistant material. The filler bodies are arranged and secured in the free space between neighboring disks where the hammers are not located. In its installed position, each filler body has a radially outwardly facing wear resistant surface having an axial width substantially the same as or slightly wider than the axial gap width of the respective spacing. The radially outer surface of the filler bodies is approximately flush with or concentric to a circumferential outer surface of the neighboring disks.

Abstract: A spider assembly for a rotary hammer assembly for a hammermill, the spider assembly including a spider having a number of arms, a replaceable end member mounted on the end of each arm and a protective cap mounted on the end of the replaceable member. The replaceable member including a contoured web that matingly engages a corrresponding socket in the spider arm. The web and socket including corresponding abutments for resisting the centrifigal force of the rotary motion of the hammer assembly. The protective cap is provided with a shroud having a contoured surface that matingly engages and protects the face of the end member.

Abstract: A hammer assembly for a hammermill of the type having a housing forming a fragmentizing chamber, a hammermill assembly being mounted for rotary motion in the chamber and including a drive shaft, a number of spider assemblies axially aligned on the shaft, each spider assembly including a number of arms having a pin opening at the outer end thereof, a number of discs alternately arranged on the shaft between the spider assemblies, each disc including a number of hammer pin openings corresponding to the number of openings in the spider arms to form axially aligned rows of openings, a hammer pin aligned at each row of openings and a number of hammers randomly mounted on the hammer pins in the spaces provided in the spider arms and between the adjacent discs.

Abstract: The litter disintegrating machine is tractor drawn over a poultry raising area. Ripper teeth extended forwardly of and mounted on the side walls of the machine act with the forward edges of the side walls to provide a section of litter for travel between the side walls. On advance of the machine, the section of litter between the side walls is acted upon by a rotary flail unit extended between and mounted on the side walls rearwardly of the ripper teeth for disintegration and discharge back to the ground floor for reuse. The density of the discharged litter material may be varied by varying its rate of discharge from the machine.

Abstract: A protective end cap for a hammermill assembly including a drive shaft having a number of spider assemblies mounted thereon, each spider assembly including a hub having a number of spider arms with the spider arms being aligned with the spider arms on the adjacent spider arm assemblies, a hammer shaft extending through each row of spider arms, a number of hammers mounted on the hammer shaft in the spaces between the spider arms and a protective cap mounted on the exposed portions of the hammer shafts between the spider arms, the caps including flanges on one or both sides for protecting the outer ends of the spider arms.

Abstract: A crushing device includes a casing with an inner wall, a rotor having a vertical axis of rotation, mounted in the casing and formed by a disk having a working surface with radially arranged fractionating blades mounted thereon and each including a working lateral face and a lateral face opposite to said working lateral face and each consisting of a main portion rigidly secured relative to the rotor disk and located nearer to the rotor axis and a peripheral portion pivoted to the rotor disk, rotatably mounted about the vertical axis, and having a section radially extending beyond said disk, and stationary grinding elements placed on the inner wall of the casing and arranged coaxially with the rotor disk.

Abstract: A heavy duty hammermill having a fragmentizing chamber and a hammer assembly mounted for rotary motion in the chamber and cooperating with a cutting comb and grate bars for fragmentizing auto parts fed into the chamber, the hammermill assembly being formed from a number of spiders mounted on a drive shaft and an end disc mounted on the shaft at each end of the spider assemblies, the spiders being spaced apart equal distances by spacer members provided between each pair of spiders and the end discs, each spider assembly including a spider having six arms with freely rotating hammers mounted on hammer pins in the spaces between the arms, the spider arms having a hub portion spaced outwardly from the spacer members and protective caps mounted on the impact areas of the spider arms and end discs.

Abstract: A material grinding mill of reversible character having hog-type hammers formed with chisel edges pivotally mounted on supporting discs, and further formed with landing areas positioned to contact the supporting discs so that the chisel edges are prevented from impacting upon or nicking the discs. The pivoting of the hammers allows them to rebound when encountering a body of hardened material so the hammer reverses direction, hence the landing area impacts on the discs and the discs are protected against being nicked by the chisel edges of the hammers.

Abstract: A Hammer mill, comprising discs (1) mounted on a drive shaft (2), crosspieces (3) for spacing apart the discs (1), hammers (4) mounted between the discs (1) at intervals defined by the crosspieces (3) and spindles (5) for swingably mounting the hammers (4) and passing through the discs (1). A device (6) is provided for selectively individually locking the hammers (4) in a retracted position in the drum which drives the hammers (4), for releasing the hammers for outward swinging. The locking device is a fluid-actuated peg (7) insertable in and withdrawable from a hole (9) in each hammer.

Abstract: A machine for preparing soil mixes and the like utilizing a hopper and a conveyor forming a live bottom for the hopper to convey the materials into a shredding chamber. A hammer mill type apparatus is positioned in the shredding chamber to shred and mix the materials. The hammer mill apparatus works in cooperation with spring-loaded bars and with stationary bars which retard the bypassing of material around the hammer mill.

Abstract: A drive shaft (2) rigidly carries disks (4) through which parallel and eccentric hammer carrier axles (6) pass. Between the disks (4), hammers (7) are mounted pivotably about the hammer carrier axles (6). Protective covers (8) cover the disks (4) and the inter-disk spaces not occupied by hammers. Each cover (8) has the form of a sector of cylinder terminating in rims (11, 12) facing the drive shaft (2) and engaged in notches (13) of the disk. On a disk (4) two consecutive notches (13) between them define a dovetailed boss and form a retaining and guiding shaped portion avoiding the use of screw fastenings and serving as a slideway during assembly.

Abstract: A rotor for a hammer mill. A plurality of support elements rest against one another in the axial direction and are staggered in a circumferential direction. Hammers are pivotably mounted on hammer shafts that are disposed in ends of the support elements. The hammers are disposed between two axially adjacent support element ends. Caps are provided on the support element ends, with both the caps that immediately follow one another in the circumferential direction, as well as the hammers that immediately follow one another in the circumferential direction, being staggered in the direction of the axis of rotation of the rotor. The caps form parallel, spaced-apart, stepped, helical coverings of the rotor periphery, and the thus-formed free spaces that are successively disposed in the circumferential direction between each two axially adjacent caps form stepped, helical hammer lanes.

Abstract: A replaceable, protective end cap assembly for the end of a spider arm for a rotary hammer assembly, the end cap assembly including a side plate assembly and a protective cap. The side plate assembly including a pair of side plates connected by upper and lower cross members that matingly engage the leading edge of the spider arm with the side plates covering the side wall surfaces in the impact area of the spider arm. The protective cap includes a shroud that overlies the front surface of the spider arm as well as the peripheral edges of the side plates and the side plate assembly and end caps being retained on the spider arms by the hammer shaft.

Abstract: An arrangement for securing a cap to the end of a supporting body of a hammer mill rotor. The forward end of the supporting body end is provided with a front projection that is an integral part of the supporting body end and extends parallel to the axis of rotation of the rotor. The rearward end of the supporting body end is provided with a recessed portion for receiving a filler member that forms a rear projection. The front and rear walls of the cap are provided with respective flanges that are directed toward one another, extend parallel to the axis of rotation of the rotor, and extend in a hook-like manner about the front and rear projections. The cap covers all sides of the supporting body end but leaves free spaces between a hammer shaft and the side walls of the cap.