Abstract: An agricultural harvesting combine is provided with a hydraulically positioned reel at the forward end of the combine. One single acting hydraulic cylinder is carried at each end of the reel. Hydraulic fluid is supplied to the cylinders through a rotary flow divider to cause each cylinder to synchronously be displaced to raise both ends of the reel in unison.

Abstract: A harrow that includes a frame having a generally laterally extending rigid beam, a shaft located below the beam, a plurality of spaced disks mounted on the shaft for rotation therewith and a pair of spaced bearing standards for resiliently mounting the shaft on the beam with each standard including a first generally C-shaped spring having an upper portion connected to the beam and the lower portion rotatably supporting the shaft for low disk impact loads and a second C-shaped spring nested within the first C-shaped spring but spaced therefrom, the first spring, as an increasing portion of its C-periphery contacts the second spring, providing therewith a graduated, higher spring rate at high disk impact loads.

Abstract: A dynamic brake mount assembly is disposed within the fluid filled chamber and comprising a brake housing immobilizingly supported by an actuator mechanism housing on one side and by support elements attached to a chamber casing on the other side.

Abstract: A rotary valve having a hollow spool with a metering notch rotatable on a sleeve which is pressed into a valve body, the sleeve having an opening selectively and progressively alignable with said notch. A thrust needle bearing is trapped between a shoulder on the spool and a cap threaded into the valve body. A passage freely transmits pressure inside said hollow spool to the side of the bearing opposite said shoulders to reduce the thrust force imposed on said bearing.

Abstract: A composite metallic and refractory article and a method for manufacturing the article is described in which a metallic layer is partially adsorbed within a refractory layer, such as a ceramic layer. The density of the refractory layer increases as it extends away from the metallic layer. The composite is formed by forcing a molten metal under pressure into the pore structure of the refractory layer. Conveniently, a desired internal shape of the finished product is achieved by using a male mold portion to supply the required pressure and to simultaneously form the article having a desired internal cavity. The application of pressure continues long enough to allow the molten metal to become sufficiently adsorbed within the porous refractory layer. When the composite solidifies, the male mold portion is withdrawn from the finished article. In one embodiment the article formed is a piston having a heat resistant ceramic cap combined with an aluminum body.

Abstract: An adjustable drawbar, which is capable of longitudinal adjustment to accommodate implements having power lines of different lengths, having a hitch pin hole at one end to permit attachment of an implement and a plurality of bores through its other end. A bracket having aligned apertures is affixed to the tractor and supports the other end of the drawbar. A pin carried by a bell crank assembly mounted on the tractor is movable by means of a control rod between an adjust position in which the pin is extracted from at least one of said apertures and a hold position in which the pin extends through both apertures and an aligned one of the plurality of bores.

Abstract: A receptacle lift apparatus for a cotton harvester or other dumping vehicle including a linear hydraulic motor including a first rod and piston assembly attached to the receptacle and a second rod and piston assembly attached to the chassis and a floating cylindrical housing receiving the first piston in one end and the second piston in the other end being independent of the chassis and receptacle for axially unrestrained movement relative thereto.

Abstract: A tractor vehicle transmission is provided with a two piston brake where each piston operates in opposite directions. A gear is located adjacent the brake which is located in proximity to a wall of the transmission. Thus upon actuation the brake wall contact the gear causing retardation of the gear, its attendant shaft, and the transmission as a whole allowing simpler shifting of the transmission. The piston force against the brake is opposed by a second piston having a spacer means that contacts the transmission wall upon actuation.

Abstract: A claw hitch for a lower link of a three point tractor linkage comprising a self-locking mechanism with over-center spring biased lever lockingly engageable with a ball of an implement coupling rod.

Abstract: A hoe that includes a transversely extending tool bar, a pivot shaft mounted on the rear and lower portion of the tool bar and extending parallel thereto, a plurality of support arms spaced along the tool bar and pivotally mounted on the shaft, each arm having a forward portion for engaging the tool bar and a rearward portion for rotatably supporting a hoe wheel, a spring extending between each arm and the tool bar to bias the hoe wheel downwardly with each arm forward portion providing a stop with the tool bar to dispose the hoe wheels in the same operative position, and each arm having a hub pivotally mounted on the pivot shaft and including preferably a plurality of elongated grooves extending parallel and adjacent the shaft the full length of the hub and a lower drain in communication with the grooves to remove soil moving between hub and shaft to free the arm and thus hoe wheel for movement by the spring.

Abstract: An apparatus that includes a frame supported pair of rotatably mounted furrow forming disks, a seed tube extending between the disks for depositing seed in a furrow, a pair of individually mounted and frame supported gauge wheel structures, each structure including a support pivotally mounted on said frame, a wheel located generally adjacent an outer surface of a disk and rotatably mounted on the support, adjustment structure for moving the supports and thus said wheels to vary furrow depth, and a furrow closing and seed soil contact assembly, said assembly including arm structure pivotally mounted on said frame and extending rearwardly to rotatably support furrow closing and seed soil contact structure rearward of the disks and a spring connected to the frame above the arm structure pivot and to the arm structure below and forward of the pivot, the spring biasing the furrow closing and seed soil contact structure downwardly with the same increase of force on the soil with the same increase in furrow depth fo

Abstract: A self propelled combine having forward main drive wheels and rear steerable wheels. A hydrostatic drive including a variable displacement motor is arranged to drive the main drive wheels. An electronic-hydraulic control system is automatically operable to drive the rear steerable wheels in response to sensing preselected pressure and combine attitude values while automatically varying the displacement of the hydrostatic drive motor to minimize combine speed changes and to provide torque as required under varying loads imposed by hilly terrain or increasing amounts of grain collected in the grain tank of the combine.

Abstract: A wheel that has an alternating tooth structure for improved entry into the soil and movement therethrough for efficient soil lifting and flow, self cleaning and balanced operation. The wheel includes a central hub, four equally spaced spokes extending radially therefrom to a circular flange from which radially extending rearwardly curved, from the direction of travel, teeth extend to work the soil. A tooth of the teeth has a rearward surface that is tapered from one lateral surface to the other and rearwardly to move the soil to one side of the wheel and the adjacent tooth has a rearward surface that is similarly but, oppositely tapered but also rearwardly, to move the soil to the other side of the wheel with the teeth alternating in this sequence around the circumference of the flange.

Abstract: Device to seal slot-shaped openings provided for the passing-through of operating levers which are supported in a pivoting manner on one plane and are either actuated by hand or by foot and which features sealing elements, one of them assigned to each opening.

Abstract: A transmission system particularly usable for transmitting power from an internal combustion engine to the driving wheels of a vehicle such as a tractor includes a multiple ratio mechanical range transmission coupled to an infinitely variable ratio hydromechanical transmission via a manually operable master clutch. A high slip fluid coupling is used to couple the hydromechanical transmission to the engine, and an electronically controlled lockup clutch locks the impeller of the fluid coupling to the output turbine when the speed of the engine exceeds a first predetermined speed, and maintains the coupling locked until the speed of the engine drops below a second substantially lower predetermined speed.

Abstract: Primary and secondary hood latches are used on a tractor hood assembly designed to roll forward on the tractor frame. Both the primary and secondary latches are unlatched through the use of either a cable operated or a lever operated independent linkage means. Both latches must be unlatched in order to allow the hood to be opened while either latch may be used to maintain the hood in a closed position.

Abstract: The planter height and control system is adapted for use with an agricultural planter assembly which is adapted to be mechanically and hydraulically coupled to a tractor and which includes a frame, a plurality of equally spaced planter units mounted to the frame, and at least two wheel assemblies on each side of the planter assembly. Each wheel assembly is pivotally mounted to the frame and includes a piston and cylinder mechanism which, when the piston rod thereof is extended, pivots the wheel assembly downwardly to effect raising of the planter units.

Abstract: A multiple clutch control system for controlling the operation of clutches in a multiple speed transmission of the type wherein the gear ratio of the transmission is altered by engaging one hydraulically operated clutch while simultaneously disengaging another hydraulically operated clutch includes circuitry responsive to the hydraulic pressure applied to the clutches for preventing simultaneous engagement of two clutches in the event that one of the clutches fails to disengage after another clutch has been engaged.

Abstract: Abrasive liquid jet cutting is provided by disposing abrasive particles in positionally supported form, as on a carrier, such as sandpaper, between the liquid jet nozzle and the workpiece. The particles are intercepted by the liquid jet and driven into the workpiece which may be ferrous or nonferrous metal. The particles may be bonded to a paper-like backing, incorporated in a binder, such as a viscous paste, or formed into a rod-like structure. Variable feed of the workpiece or the abrasive carrier can be used to provide optimized or selective abrasive cutting.