Abstract: A tractor has a vehicle frame with a pair of right and left elongate frame members spaced from each other and extending in a longitudinal direction and interconnected in intermediate positions by a cross member, an engine supported by the elongate frame members in a front region of the vehicle frame, a rear axle unit connected to rear axle connecting members fixed to the elongate frame members in a rear region of the vehicle frame, and a drive transmitting mechanism for transmitting drive from the engine to the rear axle unit. A front loader and/or a backhoe are/is attachable to a front and a rear of the tractor as supported by the vehicle frame. A reinforcing frame unit is provided for reinforcing the vehicle frame. The reinforcing frame unit is connected to the vehicle frame by reinforcing frame connecting members spaced horizontally and/or vertically from the rear axle connecting members.

Abstract: A boom lock having an actuator and a hook assembly locks a boom of a work vehicle to a swing frame. The hook assembly is pivotally coupled to the swing frame and comprises two hooks and an actuator plate. The hook assembly has a locked position wherein the hooks contact a catch assembly located on the boom and an unlocked position wherein the hooks do not engage the catch assembly. The hook assembly is moved between these two positions by the actuator. The actuator is provided with a fork having an upper tine that contacts the top surface of the actuator plate and a lower tine that contacts the bottom surface of the actuator plate. The actuator is pivotally mounted to the vehicle by a bracket and is provided with a latch for latching the actuator in a first or second position.

Abstract: The invented vehicle includes a chassis, a cabin mounted on a first side of the chassis on a forward portion thereof, and a plurality of wheels coupled to the chassis to movably support the chassis. The vehicle also includes a boom unit, a tool coupled to an end of the boom unit, and turntable unit mounted to the chassis at a central portion thereof, the turntable unit coupled to and supporting the boom unit for rotation relative to the chassis. The turntable unit is capable of moving the boom unit and the tool over a second side of the chassis opposite the first side between a first position at which the tool is positioned forward of the chassis to pick up the load and a second position at which the tool is positioned over the dump body to dump the load into the dump body. The vehicle also includes a dump body mounted to a rear portion of the chassis. The dump body can be tilted to the rear or either side of the vehicle.

Abstract: Disclosed is a chip diffuser that is useful in efficiently distributing wood chips and other particulate materials. The chip diffuser includes a novel spider helix rotor assembly that includes a spider hub that is rotatably mounted upon a central shaft stem, and at least two vane mounting rods that are attached to the spider hub. In addition, substantially planar vanes are attached to the vane mounting rods typically in a one-to-one relationship. The chip diffuser preferably functions using only the kinetic energy of the falling wood chips or other particulate materials contacting the chip diffuser.

Abstract: An excavator undercarriage frame is made to reduce the amount of machining necessary for supporting a swing bearing and ring gear on which an upper swing platform including the cab and operator's platform are mounted. The frame is made in two separate frame sections having top plates and formed peripheral skirts that nest together to form a planar support on which the base ring of a swing bearing and ring gear are mounted. The frame section plates are thin enough so that they will flex to conform to the base ring of the swing bearing, so it is not necessary to provide a machined surface for the swing bearing. The frame sections are welded together only around the peripheral edges and skirts, so that the distortion in the plates is substantially eliminated.

Abstract: When a conventional swivel working vehicle is constructed such that a real part of a swivel body is not extended beyond a traveling device in order to improve an operability at a small site, a balance weight must he significantly increased in weight so as to prevent falling and tumbling of a machine body. In the invention, left and right core metal projections of a crawler are laterally offset from a center line of the crawler and right and left lugs are formed on an outer peripheral surface of the crawler. The lugs are formed to assume the same shape on the right and left sides or laterally symmetrical shapes or occupy the same area on the right and left sides, and to be symmetrically shaped about a center of rotation of the swivel body between the left and right crawlers of the machine body.

Abstract: A swing-to-tree feller buncher has its boom swing-house assembly adjustably supported from its track carriage frame by a leveling mechanism which includes a front link, a rear link, and a pair of laterally spaced apart hydraulic cylinders. Both links are fixed to the frame toward the front of the carriage and the front link is shorter than the rear link. The upper ends of the hydraulic cylinders connect to the turntable support of the swing-house assembly at a position forward of the rear link and extend rearwardly to connect at their lower ends to the frame of the carriage at a position which is rearward of the rear link. The turntable support is also pivotable from side to side relative to the carriage about a minor axis.

Abstract: A pinion gear rotatively connected to a drive motor is radially movable relative to a swing gear of a work machine by an eccentric member to adjust the backlash between the pinion and swing gears. A supporting bracket is supportingly connected to a second end portion of the pinion gear and maintains the second end of the pinion gear from radial movement. An adjustable stop engages the supporting bracket and further prevents radial movement of the pinion gear.

Abstract: An upper cover has a curved portion formed in its end portion on the side near a work front for avoiding interference with the work front. The curved portion comprises a recessed surface having a center axis aligned with the axis of a vertical pin of a swing post, a first stepped portion provided at a lower end of the recessed surface and defining a substantially constant gap with respect to a locus drawn by a rear projecting portion of the swing post when the work front is swung, and a second stepped portion provided in an intermediate portion of the recessed surface in the direction of height thereof and having a substantially horizontal surface for assuring a foothold. The recessed surface is configured to extend along a locus drawn by a back surface of the boom when the work front is swung in its minimum-turn posture, while defining a gap with respect to the locus.

Abstract: A backhoe boom lock for locking the boom to the swing frame during transporting and craning operations. The boom is provided with two upwardly open hooks that project on either side of the swing frame when the boom is retracted into its craning or transport positions. Two bell cranks are located on each side of the swing frame and are provided with transverse catches for engaging the upwardly open hooks. The bell cranks are biased downwardly by springs. A linkage for lifting the bell cranks against the biasing force of the springs extends from the bell cranks into the interior of the operator's cab. The linkage is provided with a control lever, located inside the operator's cab for lifting the bell cranks. After the boom has been retracted into its transport or craning position, the control lever is released and the bell cranks rotated by the biasing springs so that the catches engage the upwardly open hooks on the boom.

Abstract: Disclosed herein is a miniature, portable, self-contained power machine for handling materials, comprising, a rigid frame providing the base structure for all components of said machine, a means of electrical power supply for said machine, means for regulating the motion of said machine, two endless roller chains forming a traction system and serving as the means to move said machine over various types of terrain, means for readily receiving and rigidly securing a variety of miniature, hydraulically powered material handling implements to said machine, and a central hydraulic system which is powered by said power supply means and which supplies power to said attachable material handling implements. The machine has a diversity of applications in numerous industries. The machine accepts any of a variety of attachable implements through an assembly socket and a torque arm socket, and then links the implement to the central hydraulic system with hydraulic hoses leading to a hydraulic power manifold.

Abstract: A linkage mechanism which allows a substantially 180.degree. pivoting motion of a frame, and hence a boom arm secured to the frame, around the frame's pivot axis includes a mast to which the frame is fixedly secured, the mast being pivotably mounted on a pivot axis to an associated support frame. First and second hydraulic cylinders, each having a piston rod end and a cylinder end, are connected to respective sides of the mast. A control member is operatively associated with the first and second hydraulic cylinders for effecting a linear movement of the piston rods thereof and hence a pivotal movement of the mast and thus the boom arm secured to the mast about the mast's pivot axis. An overload protection circuit is connected to at least one of the first and second hydraulic cylinders such that the mast, and the frame and boom arm, will pivot around the pivot axis in the event an associated tool secured to the boom arm meets an obstruction. This avoids damage to the associated tool as well as the boom arm.

Abstract: A control system for controlling quantity of hydraulic fluid of an excavator. The control system of this invention provides a method for controlling the quantity of the hydraulic fluid supplied to the swing motor in which in case of swinging operation for driving the swing motor in order to turn the upper frame with respect to the lower frame, the first hydraulic pump is automatically controlled by the controller in order to optimally output hydraulic fluid to timely correspond to starting of the practical swinging operation of the swing motor.

Abstract: Disclosed herein is a miniature, portable, self-contained power machine for handling materials, comprising, a rigid frame providing the base structure for all components of said machine, a means of electrical power supply for said machine, means for regulating the motion of said machine, two endless belts forming a belt traction system and serving as the means to move said machine over various types of terrain, means for readily receiving and rigidly securing a variety of miniature, hydraulically powered material handling implements to said machine, and a central hydraulic system which is powered by said power supply means and which supplies power to said attachable material handling implements. The machine has a diversity of applications in numerous industries. The machine accepts any of a variety of attachable implements through an assembly socket and a torque arm socket, and then links the implement to the central hydraulic system with hydraulic hoses leading to a hydraulic power manifold.

Abstract: A four way tilt mechanism maintaining the superstructure of an off-road vehicle generally horizontal while the vehicle is working on uneven terrain is disclosed. The tilt mechanism is very robust and provides independent adjustment of the angle of tilt relative to each of two pivot axes. The tilt mechanism incorporates a spherical bearing mounted on a shaft perpendicular to the longitudinal pivot axis of the tilt mechanism to eliminate end-play in the joint which forms the longitudinal pivot axis. The longitudinal and transverse pivot axes lie in the same plane so that many of the the forces which are transferred from the superstructure of the vehicle through the tilt mechanism to the chassis of the vehicle cannot cause a torque on the components of the tilt mechanism.

Abstract: A linkage mechanism which allows a substantially 180.degree. pivoting motion of a frame, and hence a boom arm secured to the frame, around the frame's pivot axis includes a mast to which the frame is fixedly secured, the mast being pivotably mounted on a pivot axis to an associated support frame. A first hydraulic cylinder having a piston rod end and a cylinder end is pivotably secured at the piston rod end to a first side of the mast. A second hydraulic cylinder having, a piston rod end and a cylinder end is pivotably secured at the piston rod end to a second side of the mast. A control member is operatively associated with the first and second hydraulic cylinders for effecting a linear movement of the piston rods and hence a pivotal movement of the mast and thus the boom arm secured to the mast about the mast's pivot axis.

Abstract: In the case of an excavator, particularly a shovel excavator, the superstructure is held on an undercarriage so that it can be swivelled around a first vertical axis. A jib is held on the superstructure by way of a boom swivelling block which receives the jib in a supporting manner so that it can be swivelled around a second vertical axis of rotation. A swivel device is connected with the boom swivel block and comprises a hydraulic cylinder which is connected with the swivel block by way of a guide rod. The boom swivel block with the jib can be rotated by way of a driven crank mechanism from a forward working end position extending diagonally to the longitudinal center axis of the excavator, about the second vertical axis of rotation, into a transport position which is swivelled back with respect to the driving direction.

Abstract: This invention relates to an improvement over a prior art mobile hydraulic conveyor apparatus which is mounted on the rear end of a truck for both vertical and lateral pivoting, as well as vertical storage for transport to different locations. The apparatus is moved vertically by a block and tackle arrangement under hydraulic control. Lateral pivoting is achieved by activation of a pair of hydraulic cylinders which act on the conveyor apparatus to shift the apparatus laterally about a pivot axis extending centrally through a turret connected to the conveyor apparatus and mounted on a turret holder which in turn is pivotally mounted on the rear end of the truck. The turret holder includes a c-ring which is mounted in a circumferential groove formed on the turret. The conveyor apparatus includes two pivotally connected trays which support a hydraulically driven belt which transports material dispersed from the truck to a selected location.

Abstract: Arrangement for rotator units, especially those which are intended for rotation of excavator buckets. It comprises a motor (27) which, together with a transmission (26, 29) which is coupled to a drive wheel (24) in the chain transmission, is arranged in a movable support (14), which is suspended in the housing (6) in a pivotable manner, but free from fixed connections to the housing. In the transmission there is a drive wheel (24) for a chain transmission, which wheel is connected by means of a drive chain (25) to a driven chain wheel (13) included in a shaft system (12) mounted in the housing. Spring elements (30) are arranged to pivot the movable support (14) in such a way that the chain is held tensioned. The suspension of the movable support in the housing is designed in such a way that deformations of the housing resulting from external force effect are not transmitted to the movable support in a way that would deform the latter.

Abstract: A self-contained, full-function, crane attachment for loading machines that is capable of quick release coupling with the standard bucket attachment mechanism of conventional loaders. The attachment comprises a wheel-mounted supporting frame equipped with two hydraulically driven outriggers to provide additional stability and with a control panel pivotally adjustable for comfortable use from the loader's driver seat. A horizontal boom platform is rotatably connected to the supporting frame through a vertical central axle and a generally horizontal hydraulic cylinder for adjusting the relative position of the two, so as to provide a lateral rotational degree of freedom for the platform of approximately 45 degrees in either direction.

Abstract: A step device in a miniature shovel car includes a vehicle body, a working boom mounted to a front portion of the vehicle body, a boom cylinder for vertically pivotably operating the boom, a swing cylinder for horizontally pivotably operating the boom, and an engine and a transmission case both mounted on a rear portion of the vehicle body. The step device includes a recess formed at a laterally central portion of a lower surface of the transmission case and extending in a longitudinal direction of the transmission case, a step arm pivotably mounted at its front end to a front portion of the recess, and a step mounted to a rear end of the step arm. The step arm is adapted to be raised and lowered, and the step arm is retracted into the recess when raised.

Abstract: A device is provided for tiltably connecting the boom section of a backhoe unit to the dipper section of the backhoe unit. The device includes a first member mountable to the dipper section so as to be rotatable about a first pivot axis transverse to the dipper section. The first member is connectable to the boom cylinder of the backhoe which pivots the first member about the first axis. A second member is provided which is attachable to the boom section of the backhoe. Respective coupling brackets extend from the first and second members to pivotably couple the first and second members and enable them to rotate about a second pivot axis generally orthogonal to the first pivot axis. Fluid cylinder mounting brackets extend from the first and second members adjacent the edges thereof to mount a pair of fluid cylinders in a diagonal crosswise configuration between the first and second members for tilting the first and second members relative to each other about the second axis.

Abstract: A backhoe loader has a rearward backhole mechanism having a swing frame pivotally connected to a tractor main frame on a pair of vertical pivots. A backhoe boom is swingable on a transverse pivot carried by the swing frame by actuation of a hydraulic cylinder, and the booom being swingable between rearward operating positions and a generally upright transport position. The boom is lockable in its transport position by a mechanism that includes a T-shaped latch member that is swingably mounted on the swing frame on a horizontal pivot, the swinging movement being controlled by a control lever and cable system actuable from the vehicle operator station.

Abstract: An extendable boom fork lift vehicle is described wherein the boom and its actuator are positioned over the rear axle of the vehicle such that the weight of the frame between the front and rear axles and behind the rear axle may be reduced. A modified boom and jib are also described wherein the jib may be selectively fixed relative one telescoping member of the boom. A light-duty carriage is provided to operably engage and articulate a secondary heavy-duty carriage.

Abstract: A lift vehicle for moving mine roof supports has a main drive section with a forward lift platform and a rearward articulated battery section. The articulating connection between the main section and the battery section has a clevis and pin assembly and a rotatable sleeve bearing connection. The sleeve bearing is rigidly connected to the clevis and pin assembly and rotatably connected to the battery section. The lift platform is rotatable about a horizontal axis to give it a tilting capability and is rotatable about a vertical axis to assume angled positions to either side of the vehicle.

Abstract: A swing reduction gear assembly for a swing device which prevents admission of grease into the same and in which the pressing force of grease squeezed out from between mutually meshing teeth of a pinion and an internal gear wheel thereof is reduced. The swing reduction gear assembly comprises a lower bearing for supporting an output shaft for rotation on a casing, a sealing collar fitted on an outer periphery of the output shaft and located above a pinion integrated with the output shaft, a retainer mounted on the casing below the lower bearing, and an oil seal fitted around the retainer and normally held in engagement with an outer periphery of the sealing collar. The oil seal has a lower face side lip portion formed thereon, and a disk-shaped plate is mounted on an outer periphery of the sealing collar such that the lower face side lip portion of the oil seal is normally held in contact with an upper face of the disk-shaped plate to prevent oil from entering the swing reduction gear drive.

Abstract: A bulldozer apparatus for a working vehicle comprising a vertically pivotable arm assembly, and a blade pivotable on a fore and aft axis extending along a center position of the vehicle. Two hydraulic cylinders are disposed at opposite sides of the fore and aft axis for causing pivotal movement of the blade such that the blade is pivotable in opposite directions with extensions of the hydraulic cylinders. Two engaging devices extend substantially longitudinally of the vehicle at opposite positions across the fore and aft axis and interconnect the blade and the arm assembly for relative pivotal movement.

Abstract: A hydraulic circuit for a backhoe comprising a first multiple valve, a second multiple valve, and a confluence mechanism mounted between the first and second multiple valves. The first multiple valve includes control valves connected to a first pump in parallel to one another for driving working implements. The second multiple valve includes further control valves connected to a second pump in parallel to one another for driving other working implements. The confluence mechanism is connected to a rear end of a center bypass line of the first multiple valve and to a rear end of a center bypass line of the second multiple valve. Further, the confluence mechanism, in neutral position, is connected to a return oil line for confluently returning oil from the first and second multiple valves to a tank.

Abstract: The subject device is an operational apparatus for front end loaders. The apparatus can be adapted directly onto the front end loader linkage arms at the attaching points that normally a bucket is attached to or can adapted by the means of a quick coupling attachment. The subject device should be used with a quick coupling device but is not limited to this device for its operation. The subject device herein is specifically adapted to a front end loader as an operational apparatus to perform various work functions such as a mobile crane, a front end loader, a fork lift or similar work functions in construction or railroad use but with an added dimension, that being the ability to swing 90.degree.. Such a unit comprises an auxiliary operational mechanism having dimensional power motions when attached to a front end loader and is basically a swinging, lifting and tilting member for three dimensional movement actuated by hydraulic cylinders.

Abstract: An earth moving machine comprises an earth moving tool, a plurality of drive elements arranged to move the earth moving tool in different directions, and a control unit operative for actuating the drive elements, the control unit including a single control member which is freely movable from an initial position toward all sides and additionally turnable about at least one turning axle, the control unit being further provided with at least one handle which is fixedly connected with the control member, the control unit also having sensors which respond to the movements of the control body in three mutually perpendicular directions and to the turning of the control body, the sensors being associated with the drive elements so that each of the drive elements causes a movement of the earth moving tool in a direction-synchronous manner with the movements and turning of the control member.

Abstract: A fluid pressure control system comprising a first selector valve for controlling the action of a first actuator, a second selector valve for controlling the action of a second actuator, a first flow control valve for controlling a fluid to be supplied to the first actuator, and a second flow control valve for controlling a fluid to be supplied to the second actuator. A pressure reducing valve is provided for reducing the pressure of the fluid supplied to the second actuator. The pressure on the outlet side of the pressure reducing valve is controlled by the proportional pressure relief valve which is controlled by an external pilot pressure. This system is applicable, for example, to a hydraulic excavator.

Abstract: The present invention is directed to a leveling assembly for a work vehicle. The leveling assembly comprises upper and lower plates that are pivotally connected to one another about a horizontal axis. Two trunnion mounted hydraulic cylinders are mounted to the plates for changing the relative angular position of the plates to one another. The upper plate is mounted to the upper structure of the work vehicle, whereas the lower plate is mounted to the undercarriage of the work vehicle. A portion of each trunnion mounted cylinder extends downwardly into the undercarriage of the work vehicle.

Abstract: On a work vehicle having a support, an implement carrying swing frame connected to the support by a first pivot pin apparatus, and an elevatable boom connected to the swing frame by a second pivot pin apparatus, a controllable locking apparatus having a boom lock for locking the boom in a substantially vertical position and maintaining the boom against movement, a swing lock for locking the swing frame against side to side movement, and an obstruction for preventing the swing frame from being locked against side to side movement unless the boom is locked against movement, is provided.

Abstract: A self-propelled vehicle maneuverable in an underground mine includes an elongated body having a forward end portion with a boom assembly mounted thereon. The boom assembly includes a pair of boom members that are telescopically arranged to vary the overall length of the boom. A material handling device is secured to the end portion of the boom assembly and is operable to perform various material handling operations in the mine. A support arrangement secures the boom assembly to the front of the vehicle. A pair of double acting piston cylinder assemblies are mounted on the mobile body and are connected to the support arrangement for laterally swinging the boom assembly relative to the elongated body. The boom assembly is also connected to the support arrangement for upward and downward pivotal movement independently of the lateral swinging movement by operation of a pair of pivoting cylinders.

Abstract: An earth-working machine such as an excavator includes a mobile chassis having a support base on which an internal or external gear is fixedly mounted. A slider ring is mounted on the underside of a turntable with a hydraulic motor mounted thereon and having a drive pinion held in mesh with the internal or external gear. A carriage supporting an excavating mechanism has an internal or external gear fixed to the underside of the carriage and rotatably mounted on an annular holder fixed to the turntable. An intermediate shaft is rotatably journalled in at least one bearing mounted on the turntable and has a pair of pinions fixed thereto and held in mesh with the gears, respectively. Alternatively, an intermediate shaft may have a pinion held in driving mesh with the gear secured to the carriage and driven by another hydraulic motor mounted on the turntable through sprockets and a chain trained therearound.

Abstract: Device (14) for a load carrying unit (12), intended to interconnect the load carrying unit (12) and a supporting member (10) for the load carrying unit (12), arranged to cause a rotary movement for the load carrying unit (12) in relation to the supporting member (10) in a first plane, and preferably also a pendulous motion in a second plane extending from the first plane. A member (36) is arranged turnable or rotatable in relation to the supporting member (10), suspending the load carrying unit (12), and also a preferably cylindrical disc shaped member (30), defining a first a contact plane directed towards the load carrying unit (12). The load carrying unit (12) is arranged with a contact member, defining a second contact surface directed towards the cylindrical member (30) and extending in a substantially parallel relationship.

Abstract: An improved swingable tractor-backhoe interconnection for a tractor-mounted backhoe having a pair of vertically-spaced articulation means along the axis forming an axially-aligned void space therebetween, a preferably free-floating center yoke in the void space with two vertical rows of openings securing hydraulic hoses in two adjacent rows, and a pair of side yokes on the tractor, one for each row of hoses, positioned on opposite sides of the center plane and spaced from the axis and center plane such that the two rows of hoses are divergent between the center and side yokes.

Abstract: A four track vehicle especially adapted for logging on steep slopes includes a running unit and an upper unit. The upper unit is articulated relative to the lower unit to maintain a center of gravity within the four tracked pods upon which the running unit is mounted. Sensing systems are utilized to alert the operator when the machine is in an anticipitated tipping condition. Moreover, a unique suspension system combining a torsion frame and swingable pod mounting arms are employed. The pods are locked in position when the vehicle is in an operating mode and are unlocked when the vehicle is in a travel mode.

Abstract: An earth-working machine includes a first internal gear fixedly mounted on a mobile chassis, a turntable coaxially rotatably mounted on the first internal gear, a carriage rotatably mounted on the turntable in eccentric relation thereto and having a second internal gear, an earth-working mechanism mounted on the carriage, a first hydraulic motor mounted on the turntable and having a first pinion held in driving mesh with the first internal gear for rotating the turntable about its own axis, a second hydraulic motor mounted on the turntable and having a second pinion held in driving mesh with the second internal gear for rotating the carriage about its own axis, and hydraulic driving devices for actuating the first and second hydraulic motors independently or in synchronism. The hydraulic driving devices may be controlled by an electric control system supplied with signals from angle detectors such as rotary encoders for detecting angular displacements of the turntable and the carriage.

Abstract: A motor-driven garbage truck provided with a detachable garbage container equipped with releasable coupling elements, and also having permanently mounted thereon which includes a pouring chute in the forward portion, lifting and tipping apparatus for picking up a garbage can and discharging the contents thereof into the chute leading to a receiving space, and a conveying and compacting apparatus for transferring the garbage from the receiving space into the container through the receiving opening, which is provided with a closure is disclosed. The pouring unit is disposed in part above the driver's cab and in part between the cab and the container, the chute being disposed in a region extending behind and above the cab. The lifting and tipping apparatus includes at least one lifting arm, pivotally movable about a transverse pivot carried by the pouring unit or the chassis of the vehicle.

Abstract: A material handling vehicle is provided which includes a lower truck chassis and an upper material handling structure pivotally supported by the lower chassis, all functions of which vehicle are driven by a single engine. The material handling vehicle is controllable from a main truck cab on the truck chassis or from an upper operator's cab mounted on the upper structure. The single engine provides highway travel power and power to all excavator functions, while the vehicle, including remote travel and implement manipulation capabilities, may be controlled from the upper operator cab. The main engine, when used for over the highway travel, powers the driven wheels through a power shift transmission in a conventional manner.

Abstract: An articulated arm-type excavator machine has a boom which has a trolley track affixed onto its underside. A trolley member from which a pulley block can be suspended travels along this track, and is urged into an operator-selected position by a double-acting hydraulic cylinder. A power winch is mounted on the overcarriage of the machine and a lifting cable runs from the winch, over the pulley block, to a lifting hook or other device.

Abstract: A vehicle has a steerable subframe articulated to the remainder of the vehicle, a set of lifting forks projecting forwardly from the subframe and supported thereon by a linkage permitting lifting, tilting and lateral movement of the forks, and a counterweight balancing a load carried by the forks across the subframe, the counterweight projecting rearwardly from the subframe beneath the remainder of the vehicle. Interchangeable units are engageable with the forks to transport thereby to a worksite, such as pallet units, a work platform, a crane and a cable dispenser.

Abstract: An improved swing gear for a power mining shovel which can be removed and replaced simply by partially separating the upper rotatable frame assembly from the lower stationary frame assembly and including upper and lower bearing rails formed of a plurality of arcuate segments and a plurality of arcuate bearing segments removably coupled to each other to form a circular bearing arrangement positioned between the upper and lower bearing rails whereby the bearing segments and bearing rail segments may be removed and replaced in an area exposed by the upper frame assembly without any separation of the upper rotatable frame assembly from the lower stationary assembly.

Abstract: Arrangement for swinging an attachment holder for the equipment of a hydraulic excavator around an axis perpendicular to the platform plane of the upper carriage, in a working direction parallel to the longitudinal direction of the excavator chassis. The lower part of the boom is vertically swingably fastened to the attachment holder which in turn is pivoted to the upper carriage by two radial links which are mounted at each end for turning around a vertical axis. The upper carriage is pivoted to the chassis. Furthermore the attachment holder is operatively connected to an active setting member. It is the pivoting of the carriage relative to the chassis together with the pivoting of the attachment holder relative to the carriage which enables the movement of the attachment holder in a working direction parallel to the longitudinal direction of the excavator chassis.

Abstract: An earth-working machine such as an excavator includes a mobile chassis having a support base on which an internal or external gear is fixedly mounted. A slider ring is mounted on the underside of a turntable with a hydraulic motor mounted thereon and having a drive pinion held in mesh with the internal or external gear. A carriage supporting an excavating mechanism has an internal or external gear fixed to the underside of the carriage and rotatably mounted on an annular holder fixed to the turntable. An intermediate shaft is rotatably journalled in at least one bearing mounted on the turntable and has a pair of pinions fixed thereto and held in mesh with the gears, respectively. Alternatively, an intermediate shaft may have a pinion held in driving mesh with the gear secured to the carriage and driven by another hydraulic motor mounted on the turntable through sprockets and a chain trained therearound.

Abstract: A digging apparatus (5) attachable to a bucket loader e.g. a tractor loader (1) of the type used for smaller digging work, such as excavating trenches, e.g. in agriculture, park management or the like, and incorporating a connecting device (4), intended to be connected to said bucket loader and with a pivot axle (8) connected thereto and extending mainly perpendicularly to the extension of the digging beam, a digging beam (11) pivotably supported about the pivot axle and having an overhead stay bar (13) and a bucket (17) attached to the free end of the digging beam, which bucket is operable by means of a driving device (15), and having at least one hydraulic piston (20) adapted to bring about the pivoting of the digging beam about the pivot axle and arranged to transfer pivot force to the digging beam at a short distance from the pivot axle, and wherein the digging beam (11) and the stay bar (13) are both designed as telescopic tubular profiles (11a, 11b and 13a, 13b resp.

Abstract: A shovel excavator with an upper carriage pivoting unrestrictedly on an undercarriage and with an attachment holder (6) for a boom (8) pivoting laterally at the front. The pivot shaft (5) is located a distance corresponding to at least half the conventional shovel width from the front edge (22) of the operator cab, so that when the boom is pivoted transversely and the shovel post (10) is folded up, together with the excavating shovel (11), this assembly remains within the contour of the upper carriage. Unhampered view forward and on the ground through the folded-up boom assembly is provided to the operator cab. The second pivot shaft (5) is located in the area between the travel track and the longitudinal center line L of the vehicle in one main excavating position of the upper carriage. Neither in the travel position nor in the main excavating position do the side walls of the upper carriage project laterally beyond the undercarriage.

Abstract: A hydraulic circuitry for a backhoe in which a hydraulic motor for driving one of right and left crawlers and a hydraulic cylinder for vertically oscillating a working arm assembly are connected in parallel to each other to a first pump through a multiplex valve assembly having a first center bypass, and a hydraulic motor for driving the other crawler, a hydraulic motor for slewing a platform, a hydraulic cylinder for flexing and stretching the arm assembly, a cylinder for actuating a bucket and a cylinder for actuating a dozer are connected in parallel to one another to a second pump through a further multiplex valve assembly having a second center bypass. The invention provides a circuit to permit fluid pressure from the first pump to enter the circuit connected to the second pump to provide confluence therein, when the dozer actuating cylinder connected to the second pump, for example, is operated while the backhoe is running.

Abstract: An excavating vehicle according to the present invention comprises an excavating apparatus rotated by a hydraulic actuator, said excavating apparatus being stopped automatically and smoothly at predetermined positions with a simple operation.