AU2008202666B2 - Improved jaw crusher bucket - Google Patents

Abstract

A jaw crusher bucket (10) is used for splitting, crushing and pulverising large pieces of rubble. The bucket (10) is adapted to be attached to a front-end loader or excavator. The bucket (10) has a plurality of teeth (12,13) for splitting the rubble into smaller split pieces of rubble, and jaw means (14,16) for crushing the split pieces of rubble into smaller crushed pieces. The jaw means include a stationary jaw (14) and a movable jaw (16). The stationary jaw (14) has concavely arranged crushing splines (18) on an inner face thereof, and the movable jaw (16) has convexly arranged crushing splines (20) on an inner face thereof. The bucket (10) also has grinding means (57) for pulverising the smaller crushed pieces into even smaller pulverised pieces. N1r '.4. ,"', '.4

Description

Regulation 3.2 Revised 2/98 AUSTRALIA Patents Act, 1990 ORIGINAL COMPLETE SPECIFICATION TO BE COMPLETED BY THE APPLICANT NAME OF APPLICANTS: Gregory Noel Went and Karen Margaret Went ACTUAL INVENTOR: Gregory Noel Went ADDRESS FOR SERVICE: Peter Maxwell and Associates Level 6 60 Pitt Street SYDNEY NSW 2000 INVENTION TITLE: IMPROVED JAW CRUSHER BUCKET DETAILS OF ASSOCIATED PROVISIONAL APPLICATION NO(S): 2007 903 472 - 26 June 2007 - AU The following statement is a full description of this invention including the best method of performing it known to us: m:\docs\20081023\1 44920.doc 2 The present invention relates to a jaw crusher bucket for use in splitting, crushing and pulverising large pieces of rubble, such as large boulders and chunks of concrete at a quarry or demolition site. Conventional rock quarrying methods result in the accumulation of 5 stockpiles of large boulders split from the quarry rock face that require crushing. At present, the crushing of excavated large boulders is achieved with the use of dedicated rock breaking machinery and is both time consuming and noisy due to the hammering process involved. Similarly, the demolition of concrete slab structures often produces large pieces or chunks of concrete 10 requiring crushing for efficient disposal at tips and land fill sites. There is a high cost associated with using dedicated rock and concrete breaking machinery which, when coupled to the high fees for disposing of large boulders and pieces of concrete at tips and land fill sites, encourages their illegal dumping at remote road sides and the like. 15 Australian Patent No. 2003 201 403 by the same applicants discloses a jaw crusher bucket having jaw means comprising a stationary jaw and a movable jaw. The stationary jaw presents a convex profile of crushing members and the movable jaw presents a concave profile of crushing members. Although effective at crushing large boulders and chunks of 20 concrete, there is an upper limit to the size of boulders and concrete chunks that the jaw crusher bucket of that patent can effectively crush. Modern excavation and demolition processes often produce very large boulders and concrete chunks which require effective splitting, crushing and pulverisation. There is also a limit to the size to which rock and concrete may be broken down 25 or crushed with the jaw crusher bucket of Australian Patent No. 2003 201 403. A more finely crushed or pulverised product than what can be achieved from 13/06/08 3 the jaw crusher bucket of that patent would be more useful and valuable to, say, the construction industry. It is an object of the present invention to provide a jaw crusher bucket which eliminates the need to use the dedicated rock and concrete breaking 5 machinery of the prior art. It is another object of the invention to provide a jaw crusher bucket which can split, crush and pulverise boulders and concrete chunks that are larger than those which can be handled by the jaw crusher bucket of Australian Patent No. 2003 201 403, and which can break them down to a more finely 10 crushed or pulverised product. According to the present invention, there is provided a jaw crusher bucket for use in splitting, crushing and pulverising large pieces of rubble, and adapted to be attached to a front-end loader or excavator, comprising a plurality of teeth for splitting the rubble into smaller split pieces of rubble, jaw 15 means for crushing the split pieces of rubble into smaller crushed pieces, the jaw means comprising a stationary jaw and a movable jaw, the stationary jaw having concavely arranged crushing splines on an inner face thereof, and the movable jaw having convexly arranged crushing splines on an inner face thereof, grinding means for pulverising the smaller crushed pieces into even 20 smaller pulverised pieces, the grinding means comprising a grinding plate region at a rear end of the bucket, and a crusher ram, a crushing action of the crusher ram being controlled by control means that enables the stroke of the crusher ram to be adjusted to a desirable length whereby the size of the pulverised pieces crushed by the grinding plate region can vary. 25 Preferably, the control means comprises a detent system. It is preferred that the detent system is adjustable by operation of a pivoting slide block arrangement. ' n/r I4 n 3a In a preferred form, the pivoting slide block arrangement is operable to cause the movable jaw to drag and roll rubble into the rear end of the bucket. Preferably, the crushing splines of the movable jaw and of the stationary jaw are strips of steel welded onto a steel plate. 5 It is preferred that the strips forming the crushing splines of the movable jaw are at different heights that create a crossways convexly arranged jaw plate. In a preferred form, the splines of the movable jaw change in direction at the rearward end of the movable jaw so as to define a first grinding plate 10 region. In a further preferred form, the strips forming the crushing splines of the stationary jaw are at different heights that create a crossways concavely arranged jaw plate. Two pulveriser rams and the crusher ram are preferably pinned on the 15 rear side of the movable jaw. In order that the invention may be more readily understood and put into practical effect, reference will now be made to the accompanying drawings in which: Fig. 1 is a front perspective view of a preferred jaw crusher bucket of the 20 invention showing the jaws open, Fig. 2 is similar to Fig. 1 but showing the jaws closed, Fig. 3 is a rear perspective view of the jaw crusher bucket shown in 9fl~fR~lI 4 Fig. 1 in which a guard door of the bucket is open to show internal detail, Fig. 4 is a top plan view of the movable jaw of the jaw crusher bucket shown in Figs. 1 to 3, 5 Fig. 5 is a side view of the movable jaw shown in Fig. 4, Fig. 6 is a front view of the movable jaw shown in Fig. 4, Fig. 7 is a schematic side view of the concavely arranged crushing splines on the inner face of the stationary jaw of the jaw crusher bucket shown in Figs. 1 to 3, 10 Fig. 8 is a schematic side view of the convexly arranged crushing splines on the inner face of the movable jaw of the jaw crusher bucket shown in Figs. 1 to 3, Fig. 9 is a partly sectional plan view of a detent arrangement used in the jaw crusher bucket shown in Figs. 1 to 3, and 15 Fig. 10 is a perspective view of the detent arrangement shown in Fig. 9. The jaw crusher bucket 10 shown in Figs. 1 to 3 has a plurality of rock and concrete splitting teeth 12, 13 and jaw means for crushing any pieces of rubble split from the rock or concrete into small pieces. The jaw means comprises a stationary jaw 14 and a movable jaw 16. The stationary jaw has 20 concavely arranged crushing splines 18 on an inner face thereof, and the movable jaw 16 has convexly arranged crushing splines 20 on an inner face thereof. The ribs or crushing splines 20 of the movable jaw 16, which may be replaceable, are strips of high grade, hard wearing steel welded onto a high 25 grade steel plate with different heights or depths that create a crossways convexly arranged jaw plate (see Fig. 8). There is a slight change in direction of 13/06/08 5 the splines 20 at the rearward aperture end of the movable jaw so that it may define a first grinding plate region 57. The ribs or crushing splines 18 of the stationary jaw 14 are made from similar materials as the crushing splines 20 of the movable jaw, but the 5 crushing splines 18 create a crossways concavely arranged jaw plate (see Fig. 7). There are a total of fifteen pressure piercing spikes or teeth 12, 13 in an entry region of the jaw means for splitting or snapping, and gripping purposes. The movable jaw 16 carries the convex jaw plate and nine pressure 10 piercing teeth 12 in three rows of three teeth each. The movable jaw also has two pulveriser rams 24, 26 and a larger crusher ram 28 pinned on the rear side of the movable jaw. The movable jaw also has a pivoting slide block arrangement 30 at the rear or aperture end thereof. The bucket 10, via a protective and supporting shell 31, also carries the 15 stationary jaw with its concave jaw plate. There are three pressure piercing spikes or teeth 13 on each of two opposite sides of the shell 31 at the entry region of the jaw means. The hydraulically driven rams 24, 26, 28 and the pivoting slide block arrangement 30 connect to the shell 31 of the bucket and assist in controlling movement of the movable jaw 16. 20 The pulveriser rams 24, 26 close the entry region or front end of the bucket and are operated by electric foot pedals in the cab of a front-end loader or excavator to which the jaw crusher bucket 10 is attached. The electric foot pedals are operably connected to a valve block 34 (see Fig. 3) of the bucket 10. The crusher ram 28 provides a repetitive crusher action which is controlled 25 by a detent system 36 and automatically starts operation when the operator takes his foot off any one of the electric foot pedals. GIlt/nUz/ 1 1) 6 The detent system 36 (see Figs. 9 and 10) is a mechanical arrangement that enables the stroke of the crusher ram 28 to be repetitive and adjusted to any desirable length or to suit any size of aperture end of the bucket 10 with the simple adjustment of the pivoting slide block arrangement 30. Such adjustment 5 may be readily accomplished using a half inch set or small shifting spanner. The bucket 10 includes an adjustable hitch 38 which allows it to be fitted to a wide range of excavator quick hitch arrangements. This can be achieved by replacing the rear pin bosses 40, which support hitch pins 48, with correctly fitting and sized alternatives to suit the excavator. There is thus no need to cut 10 the bucket and re-weld to remove the hitch pins. The slide block arrangement 30 has three functions. Firstly, a slide action of the movable jaw relative to the stationary jaw is enabled by the slide block arrangement 30, and this drags crushed rubble, such as small pieces of concrete, down into the rear or aperture end of the bucket 10 where they are 15 grinded into even smaller pieces. Secondly, the slide block arrangement 30 acts as a hinge point for the pulverising action of the jaws. Coupled with this, the slide block arrangement 30 prevents the movable jaw 16 from twisting as it moves about the hinge point. At the rear of the jaw crusher bucket 10 is a dust suppression boot 42 20 which acts as a containment area to eliminate dust entering the working environment around the bucket. There is a steel extraction unit 44, also at the rear of the bucket, which has a permanent magnet that magnetises a steel frame located inside the dust suppression boot 42. Any steel that falls past the magnetised steel frame is 25 magnetically collected thereby for recycling or other purposes. 13/06/08 7 The forward facing spikes 22, of which there are four located at the front end of the stationary jaw 14, are of the screwed-on kind and are used for loading of the boulders and chunks of concrete into the jaws of the bucket. There are four tie down lugs 46, two at the front of the shell 31 and two 5 at the back of the shell 31, that provide a positive point for fastening safety chains or the like thereto when the bucket 10 is being transported. The adjustable hitch 38 has its hitch pins 48 mounted to the opposite walls of the shell 31 by the bosses 40. The hitch pins 48 can, if required, be machined to a size suitable for the quick hitch arrangement of an excavator. 10 Rock and concrete that is crushed and pulverised by the impact of the jaws 14, 16 exits the bucket through the aperture 50 at the rear or aperture end of the bucket. The bucket 10 also includes an oil filter 52 to prevent contamination of the hydraulic circuitry, and a guard door 54 to prevent human contact and 15 damage to the hydraulic rams 24, 26, 28. There is a flat steel bar 56 (see Figs. 5 and 6) that supports a central row of pressure piercing teeth 12 in the movable jaw 16. The flat steel bar 56 allows the central row of piercing teeth 12 to extend further downwardly than either of the rows on opposing sides of the central row, thereby creating a 20 convex arrangement of piercing teeth in the movable jaw 16. The first grinding plate region 57 of the movable jaw 16, which is at the rear or aperture end of the jaw 16, presents a different angle of contact with the rubble compared to that of the more forward section of the movable jaw plate, thereby providing a smaller nip angle which results in more finely crushed and 25 pulverised rock or concrete pieces and an improved, more useful, shape of those pieces. 13/06/08 8 The pivoting slide block arrangement 30 defines a hinge point for movement of the movable jaw 16 relative to the stationary jaw 14, and that hinge point comprises the axle 58 (see Fig. 4) of the slide block arrangement. The axle 58 not only provides a hinge point determined by the location of the 5 slide block arrangement 30, but it also provides a mounting location for pinning the crusher ram 28 to the movable jaw 16. The axle 58 also carries the slide block arrangement and various dirt seals. Referring more specifically to the crushing splines 18, 20, the concavely arranged crushing splines 18 of the stationary jaw 14, and the convexly 10 arranged crushing splines 20 of the movable jaw 16 will cooperate, when the jaws are brought together, so as to crush, say, a block of split concrete into smaller pieces. The aperture end of the bucket 10 provides a change in direction of the opposing jaw plates so as to reduce the nip angle as the crushed material passes therethrough. The grinding plate region adjacent to 15 the aperture end of the bucket creates more fine material that can pass through the aperture. After prolonged use, the stationary and movable jaw plates and their crushing splines may become worn down and need to be replaced, and replacement may occur by unbolting the worn plates and installing new plates. The bucket 10 has a splitting section at the front end thereof that is 20 made up of a three row, convex arrangement of pressure piercing spikes or teeth 12 extending downwardly on the movable jaw 16 and a two row arrangement of similar teeth 13 extending upwardly on the stationary jaw 14. The splitting section of the stationary jaw does not have a central row of pressure piercing teeth. A piece of concrete that may be too large to fit within 25 the internal crushing section of the bucket, where the crushing splines 18, 20 are located, is scooped up by the forward facing spikes 22 and grabbed by the teeth 12, 13. The concrete is thus sandwiched between, on the underside, two 13/06/08 9 rows of piercing teeth 13 mounted on the opposed outside edges of the stationary jaw and, on the upperside, three rows of piercing teeth 12 mounted on the movable jaw. This leaves a large gap under the concrete between the two rows of piercing teeth 13, enabling the concrete to be split or snap when 5 the convexly arranged piercing teeth 12 of the movable jaw press downwardly upon the concrete. This is primarily achieved by the central row of piercing teeth 12 on the movable jaw extending further downwardly than the opposed rows, and it is the central row of piercing teeth that press against the unsupported centre region of the concrete, bending and snapping it into smaller 10 pieces. Splitting by the piercing teeth is repeated in this way until the concrete pieces are small enough to fit within the internal crushing section of the bucket 10 where the curved crushing splines of the jaws 14, 16 can effect crushing. This is achieved by orientating the bucket in an upwardly facing direction (where the forward facing spikes 22 on the stationary jaw are pointing upwards) 15 so that by opening the jaws fully the split concrete pieces will slide down into the jaws before the movable jaw is closed against the stationary jaw, allowing a first round of crushing of the already split rubble. The movable jaw is then fully opened to allow the partly crushed rubble to slide down further into the bucket, as accommodated by the now smaller size of the rubble, and the movable jaw 20 is again closed on the stationary jaw to further crush the rubble. This process may be repeated a desired number of times until the concrete has been crushed to an acceptably small size. The control of the opening and closing of the movable jaw against the stationary jaw is by foot operation of the electric foot pedals in the cab of an excavator. The size of the crushed rubble that is 25 released from the rear or aperture end of the bucket is further controlled by the size of the aperture at the rear end of the bucket, which in turn is controlled by the detent system. 13/06/08 10 The operation of the slide block arrangement is such as to cause the movable jaw to drag and roll rubble by a force-feeding action into the aperture end of the jaw crusher bucket. Specifically, the rubble is dragged and rolled through the grinding plate region 57 to the rear of the movable jaw, and this 5 allows the crushed rubble to be of a finer consistency and therefore more useful as a product. The action of the slide block arrangement increases the power of the jaw crusher bucket as provided by the crusher ram 28 from approximately 62 tons to approximately 70.68 tons, which is a gain of approximately 14% in power. The sliding action of the slide block arrangement 10 also allows the movable jaw to move slightly parallel to the stationary jaw as the two pulveriser rams 24, 26 follow a slight inwards arc, thereby enabling the movable jaw to provide equal crushing pressure simultaneously at both its front and rear ends. This improves productivity for each stroke of the pulveriser rams 24, 26. 15 Referring specifically to the dust suppression boot 42, this acts as a containment area to eliminate dust in the working environment and does not allow any wind to blow through the crushed material while it is falling through the aperture. This is achieved by the operator locating the boot 42 on the ground, stockpile or into the back of a truck, and crushing the material into the 20 boot directly. As the boot 42 slowly fills up with dust and other debris, the operator slowly raises the boot so as to maintain contact with the ground or stockpile. Referring specifically to the steel extraction unit, this includes a permanent magnet that is located close to a steel frame inside the dust 25 suppression boot 42. The steel frame thus becomes magnetised and collects any steel, such as reinforcement steel or bolts, that are present in, say, the concrete being crushed. Such steel falls through the dust suppression boot 42 13/06/08 11 and then the magnetised steel frame, during which the steel is attracted towards the magnetised steel frame and away from the remainder of the crushed material. When the operator notices that the flow of crushed material is being restricted by the build up of steel, the operator flicks a toggle switch 5 inside the cab of the excavator so as to pull the magnet away from the steel frame, thereby demagnetising the steel frame, and allowing the waste steel to be dumped into a skip bin or onto a steel pile. Referring specifically to the adjustable detent system, that system allows for repetitive action of the movable jaw. The system can be set to a desired 10 stroke or aperture size to accommodate a potentially large range of desired product sizes. The detent system operates a three directional valve block 34 through a cable. The detent system is a double ball type system that allows a detent spool to float between two balls with very little side pressure and a large range of adjustment. When the crusher ram 28 travels in the crush direction 15 and arrives at the change over clamps, the spring pressure loads up until the spring pressure on the balls is overcome, allowing the detent system to change the directional valve in the valve block 34 in the opposite direction. The crusher ram 28 then travels back to the other end of its stroke that has been set, with the other change over clamps loading up the springs. This process can be 20 repeated for as long as the operator has a foot on the main oil flow pedal in the cab. The change over clamps can be adjusted by a small ring spanner, thus making the adjustment of the repetitive movable jaw action very easy. During manufacture, the pressure in the detent system is preset and does not require changing during use. The detent system also has dust seals for the elimination 25 of concrete dust and the like entering the detent system and wearing out or jamming its components. 13/06/08 12 Referring now to the adjustable hitch, the jaw crusher bucket can be easily fitted to a wide range of quick hitch arrangements for excavators, and allows the same bucket to be fitted to differently sized quick hitch arrangements without requiring major modifications to the bucket. All that is required in that 5 instance is the replaceable boss plates in the bucket. Also, if required, the diameter of the hitch pins can be machined down to fit an appropriately sized quick hitch arrangement. Referring now to the grab action, utilisation of the jaw crusher bucket as a grab is an efficient means of moving large pieces of rock, concrete or timber. 10 The jaw crusher bucket has advantages over a general purpose bucket which is not adapted to grab and break large pieces of rock, concrete or timber in a controlled way, and over a dedicated grab and break device which requires changing when its specific task is over before other operations can take place. The double ball type detent system shown in Figs. 9 and 10 has the 15 following features. There is an outer cable 100 and a cable adjustor 102 which can be gripped by a spanner for adjusting a detent spool 111 up or down relative to a detent body. When the detent spool is in a suitable position, the outer cable 100 may be locked in that position tightly by lock nuts 103. The cable adjuster 102 has an outer cable thread 104 which is used for cable 20 adjustment. The outer cable thread 104 turns independently of the outer cable 100, thereby lengthening or shortening the outer cable. There is an inner cable 105 which is screwably secured at its lower end by an inner cable lock nut 106. There are two ball tension adjustment bolts 107. The adjustment bolts 107 include saw cuts in their respective heads, and the saw cuts serve as markers. 25 Turning of the adjustment bolts 107 a selected number of turns, say, by five turns, will be required to properly operate the detent system. If the detent system does not appear to be changing with sufficient power, further turning of 13/06/08 13 the adjustment bolts 107 may be required to vary the level of ball spring movement. However, turning the adjustment bolts 107 beyond an acceptable number of turns may destroy the detent system as the balls may be pushed through by the power of the hydraulic rams. There are lock nuts 108 for the 5 adjustment bolts 107 to maintain the operable turn location of the adjustment bolts, balls and springs. There are two tension springs 109, of the coil type, and these tension springs provide the detent spool with inward and opposite side pressure through the side balls. The two side balls, or bearing balls 110, exert opposing pressure on their respective tension springs. When hydraulic 10 pressure is applied to the detent spool 111 that is sufficient to overcome the inward side ball pressure, the resultant sliding movement of the spool through the body allows the detent spool 111 to move to alternating positions, thereby reversing the directional valve in the valve block. This operation can be repeated whilst oil is supplied by operation of the main oil supply pedal. The 15 detent spool 111 includes a pair of adjacent recesses on opposite sides thereof, and a respective bearing ball jumps from one recess to another recess during its operation. There is a top slide adjustment clamp 112 that can be moved up or down a main shaft 116. When moved up the shaft 116 so that it is closer to the detent spool, the top slide adjustment clamp 112 allows for a 20 longer jaw stroke. When moved down the shaft 116, the top slide adjustment clamp 112 allows for a smaller jaw stroke. There are two main shaft tension springs 113. Loading up the pressure on the detent system until the side ball pressure is overcome allows the balls to jump out of one recess and into an adjacent recess in the detent spool 111. The main shaft springs 113 push the 25 detent spool 111 so that the balls engage the other recess, thereby reversing the spool in the main valve. This occurs via the cable 100 and allows for repetitive jaw action. The rod end 114 is mounted to a ram and slides up and 13/06/08 14 down the main shaft 116 pushing against the main shaft tension springs 113 to activate the detent system. There is a ram mount 130 and securing bolts 115. A bottom slide adjustment clamp 117 provides adjustment of aperture size at the aperture end of the bucket. When moved down the shaft 116, the bottom slide 5 adjustment clamp 117 reduces the aperture size. There is an end pin 118 to prevent any components of the detent system coming free. An adjustor keeper rod 119 may be used when the jaw stroke is set at approximately 50mm. At this stroke, the adjustor keeper rod 119 maintains the top and bottom slide adjustment clamps 112, 117 the same distance apart when the clamps are 10 moved up or down. To release suitably sized product from the rear or aperture end of the jaw crusher bucket, the clamp lock bolts 120 on the main shaft 116 may be released and the clamps 112, 117 moved up the shaft for larger product or down the shaft for smaller product. There are two clamp lock bolts 120 that engage the main shaft 116 and one clamp lock bolt 120 that engages 15 the adjustor keeper rod 119. It will be apparent from the foregoing description that the jaw crusher bucket 10 has the advantage that it can grab, split, crush and pulverise rock and chunks of concrete that are larger than a size receivable within the jaws. The piercing teeth of the movable jaw and the stationary jaw split such a large 20 piece into smaller pieces that are then able to enter the bucket and be subject to crushing by the splines of the jaws. Crushing by the jaws is achieved by the effect of concavely arranged crushing splines of the stationary jaw and convexly arranged crushing splines of the movable jaw. Figs. 8 and 9 identify how the concave and convex arrangement of splines in each of the jaws is 25 provided. The so crushed pieces are then dragged by the action of the slide block arrangement towards the aperture end of the bucket where they are 13/06/08 15 subject to a grinding action to release a product that is of a finer grade than that produced by conventional jaw crusher brackets. It will also be apparent to persons skilled in the art that various modifications may be made in details of design and construction of the jaw 5 crusher bucket without departing from the scope or ambit of the present invention. 13/06/08

Claims (11)

1. A jaw crusher bucket for use in splitting, crushing and pulverising large pieces of rubble, and adapted to be attached to a front-end loader or excavator, comprising a plurality of teeth for splitting the rubble into smaller split pieces of rubble, jaw means for crushing the split pieces of rubble into smaller crushed pieces, the jaw means comprising a stationary jaw and a movable jaw, the stationary jaw having concavely arranged crushing splines on an inner face thereof, and the movable jaw having convexly arranged crushing splines on an inner face thereof, grinding means for pulverising the smaller crushed pieces into even smaller pulverised pieces, the grinding means comprising a grinding plate region at a rear end of the bucket, and a crusher ram, a crushing action of the crusher ram being controlled by control means that enables the stroke of the crusher ram to be adjusted to a desirable length whereby the size of the pulverised pieces crushed by the grinding plate region can vary.

2. The jaw crusher bucket of claim 1 wherein the crushing splines of the movable jaw and of the stationary jaw are strips of steel welded onto a steel plate.

3. The jaw crusher bucket of claim 2 wherein the strips forming the crushing splines of the movable jaw are at different heights that create a crossways convexly arranged jaw plate.

4. The jaw crusher bucket of claim 3 wherein the splines of the movable jaw change in direction at the rearward end of the movable jaw so as to define a first grinding plate region. IN/MR/iO1 17

5. The jaw crusher bucket of claim 2 wherein the strips forming the crushing splines of the stationary jaw are at different heights that create a crossways concavely arranged jaw plate.

6. The jaw crusher bucket of any one of claims 1 to 5 wherein the teeth are located in an entry region of the jaw means.

7. The jaw crusher bucket of any one of claims 1 to 6 wherein two pulveriser rams and the crusher ram are pinned on the rear side of the movable jaw.

8. The jaw crusher bucket of claim 7 wherein the pulveriser rams are adapted to close the front end of the bucket and are operated by electric foot pedals in the front-end loader or excavator.

9. The jaw crusher bucket of any one of claims 1 to 8 wherein the control means comprises a detent system.

10. The jaw crusher bucket of claim 9 wherein the detent system is adjustable by operation of a pivoting slide block arrangement.

11. The jaw crusher bucket of claim 10 wherein the pivoting slide block arrangement is operable to cause the movable jaw to drag and roll rubble into the rear end of the bucket. Dated this 2 0 th day of June 2012 Gregory Noel Went and Karen Margaret Went Patent Attorneys for the Applicant PETER MAXWELL AND ASSOCIATES 9)A/Ar1)