Abstract: A system and method that includes a device that is used in a particular method to install bearings into a lift cylinder yoke bore. The device includes use of a hollow bore hydraulic push cylinder that maneuvers a push plate along a threaded rod. The push plate sinks or sets into the bearing and applies pressure through the movement of the hydraulic push cylinder to place the bearing into a fit position without the abrasion that is usually associated with the installation of bearings into the lift cylinder yoke bore. The threaded rod attaches to a threaded bushing that is inserted into the bore and secured with the use of a pin. The threaded rod extends out of the bore opening and allows for the attachment of a bearing, push plate, hydraulic push cylinder, washer and nut.

Abstract: A support structure for an implement lift cylinder on an earth-working machine. The support structure includes first and second implement lift cylinder supports. The first implement lift cylinder support mounts to the work machine and the second implement lift cylinder support rotatably connects thereto about a first axis of rotation. The second implement lift cylinder support receives the implement lift cylinder and allows rotational movement thereof about a second axis of rotation. The first and second axes are located within a single plane. The dual axes provide stability and adjustability of the implement lift cylinder for different angle configurations of a work implement, such as an earth-working blade.

Abstract: A Z-bar loader linkage having a floating bell crank. A boom is pivotally mounted to a loader frame at one end and an attachment at the other end. The bell crank is pivotally mounted on leveling links extending forwardly from the loader frame. The drive end of the bell crank is provided with an attachment link that extends from the bell crank to the attachment for controlling the angular position of the attachment. A guide link extends between the attachment link and the boom.

Abstract: To provide a dual tilt control system for a work vehicle, the system being capable of using a switching valve adapted to low pressure and low flow rates and left and right tilt cylinders of the same diameter and yielding large force during pitch and dual tilt operations and requiring no piston valve. A left tilt cylinder driving hydraulic circuit and a right tilt cylinder driving hydraulic circuit for respectively supplying pressure oil from a hydraulic pump to the left and right cylinders are arranged in parallel and comprise a left tilt cylinder actuation switching valve and a right tilt cylinder actuation switching valve, respectively. In a pilot pressure signal circuit for controlling the tilt cylinder actuation switching valves, a pilot switching valve for switching a blade between the pitch operation, a single tilt operation and the dual tilt operation by means of the left and right cylinders is provided.

Abstract: A tilting loader is provided including a pair of arms connected to a vehicle and adapted to raise and lower. Also included is a bucket including a rear portion having a rear face pivotally coupled to the arms. A tilt mechanism is included for rotating the bucket about a horizontally oriented central longitudinal axis in a counterclockwise direction. The tilt mechanism further rotates the bucket about a horizontally oriented central longitudinal axis in a clockwise direction.

Abstract: A bulldozer blade (10) is automatically reset to a predetermined excavating pitch while the bulldozer (20) is traveling backwardly after it has completed an operation of excavating, carrying, or dumping earth. The bulldozer blade (10) can be set to an excavating pitch, a carrying pitch, or a dumping pitch when excavating, carrying, or dumping earth while the bulldozer is traveling forwardly, the bulldozer blade being attached to the leading ends of frame members (15A, 15B) which are pivotally mounted on opposite sides of the vehicle body (20a) in such a manner that the bulldozer blade can swing longitudinally.

Abstract: A bulldozer blade mounting structure is disclosed. The mounting structure includes a first pivot arm having a first end adapted for pivotal attachment to a tractor and a second end coupled to a bulldozer blade, and a second pivot arm having a first end adapted for pivotal attachment to a tractor and a second end coupled to a bulldozer blade. The mounting structure also includes a first coupling joint coupling the second end of the first pivot arm to the bulldozer blade, wherein the first coupling joint permits the bulldozer blade to rotate about a longitudinal axis of the first pivot arm and to rotate about an axis substantially perpendicular to the longitudinal axis of the first pivot arm.

Abstract: A front-end mounted earth working apparatus for a vehicle, including a skid steer, forms the subject of this invention. The earth working apparatus has a guide frame portion and grading portion. The guide frame portion is attached to the skid steer by a mounting plate. The mounting plate has a lifting fork extending forward therefrom being substantially horizontal. The grading portion is suspended below the guide frame portion by the lifting fork using a suspension mechanism. The grading portion being substantially parallel to the lifting fork. The grading portion further having front and rear blades attached to side rails. The rear blades being attached below the side rails by being pivotably hinged at one end and selectively secured to a corresponding adjustment plate so that the angle of each rear blade is adjustable.

Abstract: This invention is a simple, safe, and inexpensive beam structure for tractor forward mounting of a blade (24). A pivot plate (11) is mounted at the tractor lower mid-section. Parallel beams (12) are positioned through the pivot plate (11) and extend beyond the tractor front and rear. The aft ends of beams (12) are attached to the tractor 2 or 3 point rear hydraulic lift arms (26). The forward ends of the beams (12) are the blade primary attachment points. A counterweight (13) attached rearward will raise the blade (24) when the tractor 2 or 3 point rear hydraulic lift arms (26) are lowered. The blade (24) is lowered by raising the 2 and 3 point rear hydraulic lift arms (26), thereby, giving effective vertical control of the front mounted blade.

Abstract: A mechanism to interfit between the bucket of a front end loader and its support and tilting arms allows the bucket be tilted in a laterally extending vertical plane. The mechanism provides a rear plate, having rearwardly extending fastening structure to pivotally interconnect to the support and tilting arms, pivotally carrying a front plate having forwardly extending fastening structure to immovably interconnect the bucket. The pivotal interconnection of the front plate with the rear plate is accomplished by a medial journaling pin, journaling channels at each lateral end of the rear plate that carry the lateral portions of the front plate and a medial nut and bolt combination extending therebetween to allow limited pivotal motion. A first species of mounting mechanism powers the tilting motion of the bucket by an asymmetrically positioned, horizontally extending hydraulic cylinder, and a second species powers the tilting motion by an asymmetrically positioned, vertically extending hydraulic cylinder.

Abstract: An improved mechanism for connecting a ground-engaging blade to the frame of a vehicle is disclosed which allows the blade to tilt, pitch or angle relative to the frame. The disclosed arrangement includes a pair of hydraulic cylinders which control the tilting or pitching of the blade and a single hydraulic cylinder which controls the angling of the blade. The cylinders are all pivotally connected to an intermediate member which is pinned to the blade and guided through an arc on the frame by a guide bar formed on the frame. A single hydraulic circuit is disclosed which powers the pair of hydraulic cylinders to pitch or tilt the blade relative to the frame. The resulting arrangement is both simplified and relatively stable when compared to prior art structures.

Abstract: A road shoulder grading attachment movably attachable to the bucket of a front-end loader is provided. The attachment includes an upright grading blade attachable to the bucket of the loader in an angled position forward of the bucket. The attachment also includes support structure for rigidly attaching the blade to the bucket and means for raising the blade out of the path of the bucket so that when the attachment is mounted on the bucket of the loader, normal use of the bucket is possible.

Abstract: An automotive earth moving vehicle for civil and military applications. The lade is movable with respect to the body by two independently operable sets of fluid driven actuator sets which are in intersecting spatial relationship. Each actuator set is arranged symmetrically with respect to a vertical median plane of the blade and its actuators are in parallel spatial orientation with respect to each other. One set of actuators is designed for lifting and lowering the blade while the other set is designed to bring about oscillation and tilt. The blade comprises two segments horizontally linked to each other and is thus adapted to alternate between a dozer mode and a plough mode. Wing members may be provided for attachment to the two flanks of the blade in the plough mode.The vehicle also comprises a sensor for use in the plough mode adapted to feed the blade movement control with data on the terrain.

Abstract: A snow plow assembly adapted for mounting on a vehicle. The snowplow assembly includes a conventional blade mounted on the front of the vehicle and powered with conventional hydraulic systems. The snow plow assembly also includes a blade mounted on the rear of the vehicle which may be raised or lowered and maintained in a selected position by hydraulic ram and which may be tilted in pitch. Diverter switches permit the vehicle operator to selectively use a single control for either changing the angle of the front plow in a horizontal plane or either for raising or lowering the rear blade or for tilting the pitch of the rear blade. Thus, the snow plow assembly can readily be adapted and retrofitted on vehicles possessing conventional front blades. A method of using the snow plow assembly is also disclosed.

Abstract: A bulldozer and backhoe locking device for prevention of theft of heavy equipment having hydraulic pistons and cylinders by locking the blade or bucket against the ground by placement of an elongated sleeve pivoted together along one edge over the extended piston rod for engagement against the end of the piston and cylinder assembly and the boom of the backhoe or the blade of the bulldozer.

Abstract: A dozer blade mounting for a dozer frame having a dozer blade movably supported thereon includes at least one rigid link that has one end pivoted on the vehicle frame and the opposite end pivoted on the dozer frame with fluid ram means associated with the vehicle frame and dozer frame for raising and lowering the blade and dozer frame and angling the dozer frame and blade with respect to a horizontal reference plane. In one version of the invention, two separate links are universally connected at opposite ends to the dozer frame and the vehicle frame and a pair of independently actuated fluid rams are interposed between the dozer frame and the vehicle frame to produce the raising and lowering as well as the tilting of the blade with respect to the vehicle. In another version, the rigid link is raised and lowered through a fluid ram between the link and the vehicle frame and a second fluid ram is interposed between the link and the dozer frame to produce the tilting of the blade.

Abstract: Removable lifting devices for tractors having horizontal front wheel axles which pivot relative to the contour of the ground, one device having tubes pivotably connected on each side of the tractor frame which rotatably and pivotably receive further tubes connected by a hinged structure to the tractor's forward axle and which tend forwardly thereof to be interconnected across the front of the tractor. The connecting hinged structure permits pivotable movement of the tube relative to the axle about substantially horizontal axes parallel and perpendicular to the longitudinal axis of the tractor. The front structure connecting the tube portions extending forwardly from the axle includes a hydraulically operated three-point lifting device wherein hydraulic cylinders are disposed within a quadrangular arrangement of pivotable arms including the lower of the three-point lifting device's links.

Abstract: A mounting structure for a dozer frame having a dozer blade supported thereon consists of a pair of rigid links of equal length which are pivotally connected at vertically spaced pivot points on a vehicle frame and have free ends connected to the mounting frame at vertically spaced locations. The spacing between the pivot axes on the mounting frame and the vehicle frame are substantially equal so that the blade does not tilt when moved between raised and lowered positions.