Abstract: A refiner for beating a raw material supplied between a stator beating part and a rotor beating part, and discharging the beaten raw material, the refiner including a rotating shaft, the rotor beating part attached to the rotating shaft, a motor configured to drive the rotating shaft; and a motor control part configured to variably control a rotation of the motor. The rotation of the motor of the rotor beating part is controlled by the motor control part to beat the raw material.

Abstract: An ice blasting machine comprising a crusher for crushing water ice; and a crusher-activation mechanism to activate or deactivate the crusher, wherein the crusher is activated to operate in water ice mode and wherein the crusher is deactivated to operate in dry ice mode. An ice-blasting method including activating a crusher to crush water ice when operating in water ice mode and deactivating the crusher when operating in dry ice mode.

Abstract: A rebar binding machine comprises a curl guide that causes a wire to curl, a torsion part including a torsion shaft for twisting the curled wire, and a pair of grips that can be grasped by an operator. The grips are provided to the two axial sides of the torsion shaft as viewed from the operator side when the operator grasps the grips to perform an operation, and it is possible to change the height of the grips in the axial direction of the torsion shaft.

Abstract: A high-pressure pump for the overload protection of a jaw crusher, with an actuator unit which adjustably receives an actuation element in a housing, wherein the actuation element has at least one piston, wherein at least one actuator, tensioning cylinder and a pressure accumulator are provided, wherein the actuator unit is in fluid-conveying connection with the actuator such that in one pump stroke of the actuator unit a transfer fluid is pumped into a second chamber of the actuator and of the tensioning cylinder and the quantity of transfer medium displaced from the actuator, and the tensioning cylinder during the pump stroke is temporarily stored in a pressure accumulator.

Abstract: A replaceable work part which has a base and a tooth portion provided on an upper side of the base. A plurality of mounting legs extend downward from the base. Each mounting leg defines a recess and is configured to engage a corresponding mounting structure formed on a jaw of the jaw assembly. The replaceable work part is mounted to the jaw by being inserted into the same from above and sliding the same onto the jaw in a sliding direction to engage the mounting legs with the mounting structures of the jaw. In this state, locking members are inserted between the replaceable work part and the jaw and secured to the replaceable work part to restrict movement of the replaceable work part in the direction opposite to the mounting direction.

Abstract: A method for compressing or decompressing a spring loading a tie rod in a jaw crusher. The tie rod is supported by, at one location, a pendulum of the jaw crusher and, at another location, the jaw crusher's frame through the said spring. The spring is installed between the jaw crusher's frame and a second spring support supported by the tie rod; and the second spring support is moved in relation to the tie rod. A support part of the tightening device and at least two moving screws supported by the support part are arranged to influence the second spring support. The support part is supported by the tie rod through a locking member; and the at least two moving screws supported by the support part are moved to change the distance between the second spring support and the support part.

Abstract: A jaw crusher retraction assembly having a base, a first and second mount boss, a resiliently biased component and an actuating cylinder. The cylinder and resiliently biased component are mounted axially between respective regions of the base and the first and second bosses so as to minimize stress in the retraction assembly components and to provide a compact overall design.

Abstract: A movable jaw mounting assembly to provide adjustment of the close side setting (CSS) of a movable jaw and to act as a retraction assembly or assist with retraction. The assembly includes a pair of linear actuators that are coupled between the back frame end and a region of the toggle unit so as to move the toggle unit towards and away from the back frame end to allow insertion and removal of spacers and/or shims.

Abstract: A machine for shredding plastic container including a pressing device having a main housing having an interior space, a first opening for feeding container and a second opening for disposing the shredded pieces, a fixed plate position at one end within the housing and having slits arranged in matrix pattern, facing the interior of the housing, and having sharp edges, a movable plate having plurality of blades connected to at least one arm. The movable plate can move along a central axis within the housing and the blades have edges facing the sharp edges of the fixed plate. The containers are placed between the plates, such that when the movable plates moves along the central axis of the housing toward the fixed plate, the blades crash and cut the container into flakes. Pegs protrude from the blades, such that when the arm moves forward, the pegs punch the container.

Abstract: A hydraulically activated shear is provided. The shear includes: a first jaw; a second jaw configured to slide past the first jaw in a shearing motion; and a first cutting plate attached to at least one side of the first and second jaws, the first cutting plate defining a shear edge and a shear surface, the shear surface having a positive camber with respect to a plane perpendicular to the jaws, wherein at least one of the first and second jaws is actuated by a hydraulic cylinder.

Abstract: The invention relate to an attachment with interchangeable jaws, in which jaws can be interchanged according to the work purpose in the use of the attachment attached to construction equipment such as an excavator and configured to crush or shear concrete or reinforcing bars. The attachment comprises a main body unit connected to heavy construction equipment, and a jaw unit connected to the main body unit. The main body unit comprises a pair of lock pins, and at least one operating cylinder. The lock pins and the least one operating cylinder are mounted on a main body unit frame. The main body unit frame comprises an equipment connecting section, a first support, a second support, and a hook pin-receiving portion. The jaw unit comprises a pair of jaws, a jaw pin, and a hook pin. The jaw unit frame comprises a third support.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: The present invention relates to a separating device for crushing concrete. The separating device comprises at least two crusher members which, optionally in co-action with bounding elements situated adjacently of the at least two crusher members, define at their upper outer ends an inlet opening for concrete to be crushed and at their lower outer ends an outlet opening for crushed concrete or at least concrete fractions. The separating device further comprises a drive device adapted to move repetitively at least a part of one of the two crusher members in the direction away from and toward the other crusher member. Outlet restriction means are provided under the outlet opening to limit an outflow of crushed concrete and/or concrete fractions. The invention further relates to a method for crushing and separating a composite material, in particular concrete, into original components.

Abstract: A front end of a frame of a jaw crusher comprises a curved front wall for receiving crushing force. The front end comprises an inner rib structure formed to the curved front wall. A jaw crusher and a crushing plant.

Abstract: A pitman of a jaw crusher has an upper part, which includes an upper supporting point for supporting the pitman in the body of the jaw crusher, and a lower part having a lower supporting point for supporting the pitman in the body of the jaw crusher through a toggle plate. The lower part of the pitman includes sidewalls and honeycomb structure open to the crushing direction, which structure has one or more cross-sectional supports reaching from the first sidewall of the pitman to the second sidewall.

Abstract: A rock crusher is attached to a typical excavator that has a swing boom, an extension arm attached to the swing boom, and a bucket attached to the extension arm. The rock crusher has at least one blade fixedly attached within the bucket's interior and at least one anvil fixedly attached to the extension arm just above the bucket. At least one other blade is pivotally attached to the extension arm as well as to the swing boom via a linkage so that when the extension arm is drawn toward the boom by pulling back on the operator's stick, this second blade is crushingly pressed onto the material within the bucket.

Abstract: A roller jaw crusher system including an elongated roller that rotates normally about a center axis, and a movable breaking plate configured to define a gradually smaller gap between the breaking plate and the roller, wherein the movable breaking plate is configured to rise upward and descend in both a downward direction and a direction toward the elongated roller to break a frangible material captured between the elongated roller and the movable breaking plate.

Abstract: A jaw set utilizes blade inserts having serrated surfaces which draw in to capture and cut material prior to the material becoming trapped in the apex of the blade arrangement, thereby maximizing efficiency of the cutting operation. The subject invention is also directed to an individual blade insert having grooves that are longitudinally offset from bolt holes used to retain the blade insert within a jaw set.

Abstract: A blade set associated with jaws for demolition equipment used to break railroad rails includes a bottom blade associated with a bottom jaw and a top blade associated with a top jaw, wherein the bottom jaw and the top jaw are rotatable relative to one another. The bottom blade includes two spaced-apart support rails separated by a cavity, while the top blade includes a single raised knife rail positioned and central to the cavity and rotatable toward the cavity. The top blade additionally may be marked with indicia, such as red paint, such that the machine operator may properly orient the top blade during a cutting operation to maximize safety. Additionally, the recesses may also be aligned and sized to engage the head and the foot of a rail such that tension and/or a bending moment is introduced between the head and foot of the rail.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A chip discharge chute having a flexible chute main section having an upstream end connectable from a chipping machine output, a main section elevation mechanism connected to the downstream end of the chute main section for controlling a height of the downstream end of the flexible main section with respect to a chip receiving area, and a chute deflector section pivotably connected to the downstream end of the flexible main section for receiving chips from the downstream end of the chute main section and a downstream end with a downwardly directed ejection opening for discharging chips into the chip receiving area.

Abstract: A concrete pulverizer adapted for mounting on an arm of an excavator including a lower jaw having a first pivot pin mechanism and a crushing surface. The crushing surface on this jaw is formed with concrete waste apertures. An upper jaw has a rear end section connectible to an end of the arm and has crushing teeth mounted on a lower side. This jaw is pivotably connected to the lower jaw by the pivot pin mechanism. The upper jaw is pivotably connected to a hydraulic cylinder actuator on the arm and can be pivoted between an upper position and a crushing closed position. There is a power mechanism for pivoting the lower jaw between a horizontal scooping position and a dumping position and this mechanism can hold the lower jaw in a crushing position while the upper jaw is being pivoted by the hydraulic cylinder actuator.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools are independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. When the tool is a shear, one blade has a slot which accepts the other blade and provides blade relief along the cutting inserts. Additionally, one blade has a hook shape to draw material toward the throat of the jaws.

Abstract: A blade set associated with jaws for demolition equipment used to break raiload rails includes a bottom blade associated with a bottom jaw and a top blade associated with a top jaw, wherein the bottom jaw and the top jaw are rotatable relative to one another. The bottom blade includes two spaced-apart support rails separated by a cavity, while the top blade includes a single raised knife rail positioned and central to the cavity and rotatable toward the cavity. The raised support rails associated with the bottom blade and the raised knife rail associated with the top blade have spaced recesses across their width which enhance the ability of the jaw sets to grab and retain work pieces. Additionally, the top blade has an outwardly tapering shape, such that upon completing a cutting operation a remaining portion of the severed railroad rail may be held and clamped by the jaw set for transportation or further processing.

Abstract: An improved active grate consisting of at least two elongated rockers positioned parallel to one and another, each rocker having a lower surface and an upper surface and configured to rotate back and forth about their longitudinal axis. Each individual rocker is further configured to rotate in the opposite direction of the adjacent rockers such that any pair of adjacent rockers alternately forms a void allowing material to pass through active grate when rotating in one direction into a first position, and closes the void when rotated in the opposite direction in a second position. The active grate finds particular utility in a combined gasification/vitrification waste treatment system, where it is used to pass partially oxidized materials from a gasification chamber to a vitrification chamber. The rockers include a coolant loop through the longitudinal axis of the rockers.

Abstract: This invention relates to a demolitions shears, including a body having a fixed jaw and a movable jaw that pivots with respect to the fixed jaw. A main shaft for pivotally mounting the moveable jaw to the body. A hydraulic cylinder for actuating the movable jaw to pivot. The movable jaw includes a first rotation stop and the main shaft including a second rotation stop. When the main shaft is installed in the moveable jaw, the first rotation stop and the second rotation stop are coupled to prevent relative rotation between the main shaft and the movable jaw, without axially fixing the main shaft to the movable jaw. A removable stop assembly is constructed and arranged to limit axial movement between the main shaft and the movable jaw.

Abstract: A concrete pulverizer adapted for mounting on an arm of an excavator including a lower jaw having a first pivot pin mechanism and a crushing surface. The crushing surface on this jaw is formed with concrete waste apertures. An upper jaw has a rear end section connectible to an end of the arm and has crushing teeth mounted on a lower side. This jaw is pivotably connected to the lower jaw by the pivot pin mechanism. The upper jaw is pivotably connected to a hydraulic cylinder actuator on the arm and can be pivoted between an upper position and a crushing closed position. There is a power mechanism for pivoting the lower jaw between a horizontal scooping position and a dumping position and this mechanism can hold the lower jaw in a crushing position while the upper jaw is being pivoted by the hydraulic cylinder actuator.

Abstract: A hydraulic crusher includes crushing arms, a crusher body having a hollow portion extending in the longitudinal direction, and hydraulic cylinders. The hydraulic crusher includes four first hydraulic hoses which have proximal caps connected to ports of the crusher body and extend toward the distal side in the longitudinal direction in the hollow portion; four second hydraulic hoses which have proximal caps connected to ports of the hydraulic cylinders, and extend into the hollow portion and then toward the distal side in the longitudinal direction while being curved; and a clamp or the like serving as a joint member movable in the longitudinal direction, the clamp connecting distal sections of the first hydraulic hoses with distal sections of the second hydraulic hoses.

Abstract: A mobile bucket assembly for crushing objects includes a frame configured as a bucket that can carry a screen and/or a magnet. The mobile bucket assembly can be attached to a piece of construction equipment such as a front end loader or an excavator for example.

Abstract: A modular system for connecting attachments to the extension arm of a construction machine, wherein each module has a standardized coupling arrangement. As a result, each module is compatible with another module to provide great versatility in configuring the machine. Additionally, the system includes a variety of different modules and a mechanism for remotely activating the coupling between modules.

Abstract: A crushing apparatus for demolition works includes a main body having a connecting portion intended to be connected to the end of a handling arm, and at least a swingable jaw articulated to the main body at a distal portion with respect to the connecting portion, which is adapted to allow, during a demolition work, that a member to be demolished is grasped. Actuator devices are interposed between each swingable jaw and the main body, which are intended to control the movement of the respective jaw. The apparatus also includes percussion devices adapted to carry out an action of percussion on a member to be demolished, which it is grasped by said at least one jaw.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools are independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: The present invention provides a multi-purpose scrapping machine suitable for the scrapping work for not only discarded automobiles but also various kinds of wastes such as construction wastes and piping wastes. The scrapping machine is equipped with a hydraulic-actuated arm/boom assembly mounted on an automotive vehicle, a nibbling pincher for scrapping work mounted to the tip of the arm/boom assembly, and a pair of right and left power-driven clamp arms mounted at the front or rear of the vehicle. The scrapping machine comprises a peeling tool to clamp a covered electric wire to be scrapped from the periphery thereof by the closing motion of the clamp arms and to slash and peel off the outer sheath of the wire in the state of clamping the wire in accordance with the drawing operation of the core of the wire with the nibbling pincher.

Abstract: A crushing or cutting device comprising a body (6), crushing/cutting jaws (1) making, rotation and attached to the body by means of one or several shafts (5), a first power unit (3) to move said jaws against each other, whereby at least one shaft (5) of jaw (1) is fitted with bearings to rotate in regard both to body (6) and jaw (1) and the said bearings are eccentric among themselves and the device has a second power unit (4) in order to rotate at least one said shaft (5). The second power unit (4) is fitted to press jaws (1) against each other in multiplying the motive force of the second power unit (4) between eccentricity distance (e) of the bearings and by means of a torsion arm longer than said eccentricity distance (e) connected to the shaft, in a situation, where shaft (5) is rotated 180° at the most, and when the first power unit (3) is hydraulically locked or in a position pressing the jaws against each other.

Abstract: A lubricating system for a heavy-duty material processing shears provides lubricant to one of more wear surfaces on one or more wear portions in the shears. The system includes a hydraulic lubricant pump that is actuated by the main hydraulic control system by means of which the jaws of the shears are opened and closed, and may include a sequential valve to distribute lubricant to various wear portions in sequential fashion. The lubricating system may lubricate one or more wear surfaces of the lateral blade stabilizers, primary and secondary blade(s) on the upper and/or lower jaws, pivotal connections between jaws and/or between the upper jaw and the hydraulic cylinder, a forward wear plate, or any other wear portion of the shears. The lubricating system may be retrofitted onto a conventional non-lubricated shears by replacing a conventional upper jaw with an upper jaw with lubricant conduits and a lubricating system.

Abstract: A lubricating system for a heavy-duty metal demolition shears provides lubricant to one of more wear surfaces on one or more wear portions in the shears. The system includes a hydraulic lubricant pump that is actuated by the main hydraulic control system by means of which the jaws of the shears are opened and closed, and may include a sequential valve to distribute lubricant to various wear portions in sequential fashion. The lubricating system may lubricate one or more wear surfaces of the lateral blade stabilizers, primary and secondary blade(s) on the upper and/or lower jaws, pivotal connections between jaws and/or between the upper jaw and the hydraulic cylinder, and a forward wear plate. The lubricating system may be retrofitted onto a conventional non-lubricated shears by replacing a conventional upper jaw with a lubricated upper jaw and lubricating system.

Abstract: A multiple tool attachment system (10) for demolition equipment includes an adapter (12) and a universal body (18) coupled to the adapter with a pair of pivotable jaws (22) pivotally attached to the universal body. Each of the jaws includes a tool carrier for mounting one of a selective set of tool attachments. Each tool attachment forms a distinct tool for the system. The tools can include, but are not limited to a cracker, a pulverizer, a wood shear, an iron/rail cracker and a grapple.

Abstract: A cutting implement (1) includes a plurality of sets of jaws (3) which cut a single length of material at a plurality of separate positions along the length of the material. A single actuation of the implement (1) causes each of the jaws (3) to at least partially and consecutively close. The consecutive closing of adjacent jaws (3) places a first jaw in a cutting configuration and a second, immediately adjacent jaw in a clamping configuration. The cutting implement (1) is connected to and actuated by the actuator arm of an excavator (9).

Abstract: A heavy-duty demolition apparatus for attachment to the boom structure of an excavator, the apparatus having interchangeable jaw sets. The apparatus includes a unitary jaw assembly, having a pair of pivoting jaws connected by a main pivot pin; a first adaptor on the boom structure; a second adaptor on the jaw assembly, the second adaptor engaging the first adaptor, so that the jaw assembly can be easily removed as a unit from the boom structure and another jaw assembly installed on the boom structure; and a lock pin fixed to the first adapter and engaging the second adapter to maintain the jaw assembly in locked relationship to the boom structure. Because of the structure of the apparatus, the distance between the attachment point of the hydraulic ram on the boom structure and the main pivot point of the jaw assembly can be varied between interchangeable jaw assemblies.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A lubricating system for a heavy-duty metal demolition shears provides lubricating lubricant to one of more wear parts. The system includes a hydraulic lubricant pump that is actuated by the main hydraulic control system that opens and closes the jaws of the shears. The lubricant pump may include a sequential valve to distribute lubricant to various wear parts in sequential fashion. As disclosed herein, wear parts that may be lubricated by a lubricating system as per the invention include (but are not limited to) lateral blade stabilizers, a guide blade, and cutting blade insert members.

Abstract: A demolition cutter which can smoothly cut an object while eliminating the possibility of any gap being formed between mating surfaces having cutting edges. The cutter includes an arm pin 8 extending between a pair of side plates 6 of a movable bracket 3. Two arms 9a and 9b are mounted on the arm pin 8 so as to be pivotable about the pin 8 between open and closed positions. Cylinders 14a and 14b are connected to the arms 9a and 9b, respectively. The arms 9a and 9b have mating surfaces 11 formed with cutting edges adapted to cut an object when they cross each other. The cylinders 14a and 14b have their axes offset outwardly from the mating surfaces 11 so that when the cylinders are extended, the arms 9a and 9b are closed with their mating surfaces 11 in close contact with each other. This prevents the formation of a gap between the mating surfaces during cutting.

Abstract: A crushing apparatus includes a substantially U-shaped spring member having a first beam portion having a first free end, a second beam portion having a second free end, and a fixed center portion. The first and second free ends are in opposed, spaced relation with each other. A first crushing mass is positioned on the first free end, and a second crushing mass is positioned on the second free end of the spring member. An exciter is configured to excite the first and second beam portions at about a common first modal frequency. When so excited, the first and second crushing masses reciprocally converge and diverge such that material positioned between the crushing masses is at least partially crushed therebetween.

Abstract: An automatically swiveling crushing apparatus has a swiveling motor in a bracket, and branches diverged from charging and discharging paths that constitute the hydraulic piping leading to a cylinder for closing or opening distal crushing arms. One of the branches extends from one of the paths then operating to open the end arms, so that a portion of the hydraulic fluid is fed to the hydraulic motor if and when internal pressure in this branch has exceeded an upper limit. The other branch extends from the other path leading to the cylinder so as to close the end arms, and this branch prevents any amount of hydraulic fluid from flowing back to the motor. The branches render dispensable a discrete or independent hydraulic piping in a self-propelled platform having a proximal working arm to be connected to the apparatus, saving cost and labor in connecting this arm to the apparatus.

Abstract: A bucket for crushing and screening stone and similar materials. The bucket has a scoop-shaped body defining an inlet opening for the stone to be crushed and an outlet opening for the crushed stone, between which a direction of flow of the stone is defined. The bucket further has a stone-crushing mechanism including a first jaw and a second jaw housed in the scoop-shaped body and movable relative to one another. The bucket still further has an element for moving the first jaw relative to the second jaw. The element imparts to the first jaw a combined rotational and translational movement relative to the second jaw in which a first component of the movement is away from and towards the second jaw and a second component of the movement is substantially parallel to the direction of flow.

Abstract: A multiple tool attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools are independently attachable to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool generally includes a pair of pivotable jaws adapted to be pivotably attached to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.

Abstract: A multiple attachment system is adapted to be attached to demolition equipment. The system includes a universal body attached to the demolition equipment. A series of tools is independently attached to the universal body. The universal body includes a guide slot extending longitudinally along the universal body. Each tool includes a pair of pivotable jaws adapted to pivotably attach to the universal body with at least one linkage extending from the universal body and attachable to each jaw of the tool. A slide member is received within the guide slot, with each linkage attached to the slide member, and a piston cylinder arrangement is attached to the universal body and coupled to the slide member for moving the slide member and the jaws. The multiple tool attachment system is provided with quick change features and is designed to optimize the cutting characteristics throughout the movement cycle.