Abstract: A piston lock system having first and second cylinders, first and second pistons telescopically connected to the cylinders, and first and second piston locks. The piston locks are movable in a transverse direction within a planar region between the cylinders, between unlocked positions in which the piston locks are not located between the free ends of the cylinders and the free ends of the piston, and locked positions in which the piston locks are located between the free cylinder ends and the free piston ends. A control link is operatively connected to the piston locks, and configured to simultaneously move the piston locks between the locked and unlocked positions.

Abstract: Truck mounted forklift (200) for mounting on the rear of a vehicle. The truck mounted forklift comprises a u-shaped chassis (201) with a linkage (103) lifting assembly mounted thereon. The linkage lifting assembly comprises a carriage (101) slidably mounted on the chassis and a linkage, the linkage comprising a first link (105) connected to the carriage by a pivot joint (107) and a second link (109) connected to the first link by a pivot joint (111). A fork carriage (113) is connected to the other end of the second link. The second link comprises a telescopic link having a plurality of link sections nested together. Cylinders (115,117) are provided to operate the links and the telescopic link. The linkage is more compact than other duplex (i.e. two part) linkages, will not protrude rearwardly increasing the overhang of the forklift and will be able to be mounted and dismounted in a substantially vertical direction, obviating the need for reinforced, heavier tines.

Abstract: A compact utility loader is operated by a standing operator at the rear of a frame. A loader arm assembly comprises a scissors linkage on either side of the frame nesting around the prime mover. Each scissors linkage has an upper loader arm that is pivoted at its rear end to rears ends of a pair of lower loader arms such that the pivot connections to the upper loader arm move upwardly and forwardly relative to the frame during elevation of the loader arm assembly to provide a high lift capability. The frame is self-propelled by a differential drive and steering system that is operated by dual levers. A hand grip extends between and unifies the operation of the levers to permit the operator to more easily move the levers in the ways that are needed to provide either straight motion of the frame or turns of the frame.

Abstract: Provided is a work vehicle including a cabin and a loader work device. The work vehicle includes: a vehicle main body; a main body rear; front and rear wheels; a bucket; a lifting arm connected to the bucket to lift the bucket; a boom support connected to the lifting arm; a rear link having one end coupled to a first boom support hinge part of the boom support and an opposite end coupled to a rear hinge part of the main body rear; a boom cylinder having one end coupled to a second boom support hinge part of the boom support to rotate the boom support; and a rotation link having one end coupled to a third boom support hinge part of the boom support and an opposite end coupled to a front hinge part of the vehicle main body.

Abstract: This invention relates to a truck mounted forklift for mounting on the rear of a carrying vehicle, the truck mounted forklift having a lifting assembly mounted on the chassis, the lifting assembly comprising a linkage, the linkage comprising: an elongate first link connected at its proximal end to the chassis by a pivot joint; an elongate second link connected at its proximal end to the distal end of the first link by a pivot joint; a fork carriage connected to the distal end of the second link by a pivot joint; a plurality of link cylinders for actuating the links; and a tilt cylinder for actuating the fork carriage. By having such a truck mounted forklift, top far side loads will be accessible without the lifting assembly coming into contact with the roof of the carrying vehicle or with bottom near side loads. Additionally, the front wheels of the truck mounted forklift will not need to be positioned under the carrying vehicle to reach top far side loads.

Abstract: A compact utility loader is operated by a standing operator at the rear of a frame. A loader arm assembly comprises a scissors linkage on either side of the frame nesting around the prime mover. Each scissors linkage has an upper loader arm that is pivoted at its rear end to rears ends of a pair of lower loader arms such that the pivot connections to the upper loader arm move upwardly and forwardly relative to the frame during elevation of the loader arm assembly to provide a high lift capability. The frame is self-propelled by a differential drive and steering system that is operated by dual levers. A hand grip extends between and unifies the operation of the levers to permit the operator to more easily move the levers in the ways that are needed to provide either straight motion of the frame or turns of the frame.

Abstract: Disclosed is a self-level mechanism for controlling a tilting movement of an equipment (15) mounted to an equipment connector (5) of a main arm (3) of a lifting arrangement of a construction machine, preferably a wheel loader (1), upon pivoting said main arm (3). The self-level mechanism is configured to at least partially compensate any tilting movement of the equipment (15).

Abstract: A lifting arrangement for a construction machine comprises a main arm (3) which is provided with a pivot connector (4) at a proximate end thereof and an equipment connector (5) at a distal end thereof, a main arm support means (6) for pivotably supporting said pivot connector (4) of said main arm (3), wherein said main arm support means (6) is movable in a direction which includes at least a component in the front-rear direction with respect to said frame arrangement. Further a guiding means (7) is provided which is engaged to said main arm (3) at a guided portion (10) of said main arm (3) positioned between said pivot connector (4) and said equipment connector (5).

Abstract: The present invention is a high reach lifting big bale fork attachment for attachment to a wheel loader, a large front end loader for an agricultural tractor, a large construction loader, a large forklift or other big bale handling equipment. The high reach lifting big bale fork attachment has a rear coupler slide assembly slidingly connected to a sliding mast assembly having two spaced mast I-beams each beam having a straight rear rail and an arced front rail. When attached to a wheel loader or bale handling equipment, the invention provides improved elevation and offset capabilities to the wheel loader or other bale handling equipment in lifting, moving, tilting, and depositing or retrieving one or more vertically stacked bales onto or from a place of deposit such as the ground, hay barn or shed, or a preexisting bale stack in an agricultural setting. When equipped with the invention, the bale handling equipment can place or retrieve bales higher and further forward and over higher obstacles.

Abstract: In one aspect, a lift assembly for a work vehicle may include a loader arm and a control arm extending between first and second ends. The first end may be coupled to a chassis of the vehicle at a first pivot point and the second end may be coupled to a rear end of the loader arm at a second pivot point. Additionally, the lift assembly may include a lift cylinder coupled between the loader arm and the chassis and a control cylinder extending between upper and lower ends, with the upper end being coupled the control arm and the lower end being coupled to the chassis at a third pivot point.

Abstract: A work vehicle includes a pair of booms, a link mechanism and a control unit. The booms are attached to a front part of a vehicle body in an upwardly and downwardly rotatable state. The link mechanism couples a working unit to tips of the booms. The link mechanism is configured to keep the working unit in a posture generally parallel to the ground without rotating the working unit with respect to the ground while the booms are elevated from a position where the working unit is disposed on the ground when the working unit is a fork. The control unit is configured to execute a tilt angle adjusting control for the working unit in accordance with variation in an angle of the booms while the booms are elevated when a tilt angle of the working unit is greater than or equal to a predetermined threshold.

Abstract: A lift assembly for lifting an implement relative to a frame of a work machine is disclosed. The lift assembly includes a lift arm having a frame pin bore, a cylinder pin bore, a linkage pin bore, and an implement pin bore. The frame pin bore and said cylinder pin bore define a first line. The frame pin bore and said implement pin bore define a second line. The second line is located above said first line. The first line and said second line define an angle which is greater than three degrees. A plane intersects said first line at a center point of said cylinder pin bore and is normal to said first line. A said plane divides said lift arm into a frame-side segment and an implement-side segment. The first line includes a first segment which is entirely coincident with said implement-side segment of said lift arm. The linkage pin bore is defined in said frame-side segment. The lift assembly further includes a tilt lever which is pivotably coupled to the lift arm at said linkage pin bore.

Abstract: An excavator linkage comprising a ternary link with first, second and third pivot connections and a follower link with first and second pivot connections. The first pivot connection of the ternary link is pivotally coupled to the rod end of the bucket actuating hydraulic cylinder. The second pivot connection of the ternary link is pivotally coupled to the excavator bucket. In addition, the excavator bucket is pivotally connected to the dipperstick. The follower link has a first pivot connection that is pivotally connected to the dipperstick and a second pivot connection that is pivotally connected to the third pivot connection of the ternary link. In one frame of reference, the third pivot connection of the ternary link is located between the first and second pivot connections of the ternary link. In addition, the third pivot connection of the ternary link lies above a plane defined by the first and second pivot connections of the ternary link.

Abstract: A surface cleaning machine (10) is disclosed in the preferred form as a combination sweeping-scrubbing apparatus including a sweeping brush (18) for sweeping debris into a hopper (20) and a one piece squeegee (112) for picking up solution after four staggered, disc brushes (122). The squeegee (112) is U-shaped having a longitudinal extent greater than that of the disc brushes (122) located intermediate the legs (124) of the squeegee (112). The drive wheel (16) is located in front of the disc brushes (122), the squeegee (112) and the solution applying means (128). The squeegee (112) is raised and lowered relative to the frame (12) by an actuator (104) which pivots an L-shaped member (94), the leg (96) of which abuts against and pivots a lever (84) interconnected to the mount (62) for the squeegee (112) by a turnbuckle (88). The hopper (20) is raised and simultaneously tilted by a single cylinder (30 ) which pivots the upper arm (24) of a parallelogram including a lower arm (36).

Abstract: A skid steer loader includes lift arms which are supported by two pairs of guide links arranged such that the bucket undergoes substantially vertical movement as it moves between lowered and raised positions. One of the pairs of guide links serves as part of a self-levelling linkage which maintains the bucket in a substantially level attitude throughout the movement of the bucket between the lowered and raised positions thereof.

Abstract: A high-lift attachment for a tractor provided with a three-point linkage comprises a platform provided with a vertical backing frame, and a vertical intermediate frame positioned between the backing frame and the tractor body. The intermediate frame is connected to the three-point linkage arms of equal length by three pivots which are positioned on this frame in spatial alignment corresponding to the position of the points of attachment on the tractor, whereby the frame remains in its vertical position at any height of lift. The intermediate frame and the backing frame are interconnected by one upper and two lower links which are in parallel alignment and wherein the distance between their linkage points is identical for all three links. The two lower links are elongated beyond the intermediate frame towards the tractor body which latter is provided with a pivoted member serving to attach the ends of these links and to keep them in their initial lowermost position.

Abstract: A mechanical linkage and hydraulic circuit are used to control the position of a material handling element. A bell crank and outrigger arm are joined between the boom and dipperstick of a backhoe linkage and the supporting frame. A relief valve discharges fluid pressure building up in the actuator between the support frame and the boom. The bell crank linkage and hydraulic circuit maintains the position of the material handling element along the grade by manipulating the dipperstick alone.

Abstract: A hydraulic excavator has a bucket actuating and control linkage comprising a boom pivotally connected at one end to a self-propelled vehicle, a stick pivotally connected at one end to the other end of the boom, and a bucket pivotally mounted on the other end of the stick. A pair of hydraulic cylinders for actuating the bucket are pivotally connected to the boom via a pair of bucket attitude control bellcranks, respectively. By adjustment of the angular position of the bucket attitude control bellcranks relative to the boom, as by another pair of hydraulic cylinders, the bucket can be conditioned for a level crowd attitude, crowd-to-carry attitude, or crowd-to-dump attitude.

Abstract: The present invention relates to a method for determining the locations of the two hydraulic jacks for controlling an assembly of two pivoted arms, the first arm, called boom or jib, pivoted on the frame of a public works machine, such as a loader or a hydraulic shovel, and the second arm, called balance beam, pivoted on the first arm, while a bucket, adapted to rest on the ground during loading, is coupled to said balance beam, each of said two jacks is coupled between the frame and the balance beam, at least one of the axes of coupling of one of the jacks being separate from the axis of coupling of the other jack on the same element--frame or balance beam--and the instantaneous centers of rotation of the bucket, corresponding respectively to the functioning of each of the control jacks when the bucket is near the ground, are chosen to be on the longitudinal axis of the boom, wherein the first instantaneous center of rotation is chosen to be near the ground, the second instantaneous center of rotation is cho

Abstract: An improvement to large container handlers having a transportable platform. A powered positionable support arm is pivotally mounted on one end to the platform for vertical rotation. A L-shaped arm is pivotally mounted from the other end of the support arm to be vertically rotatable. A container gripping device is suspended from the L-shaped arm. In one embodiment, the support arm is mounted to move the L-shaped arm vertically as the support arm is rotated so as to, thereby, raise and lower a container without sidewards movement.