Abstract: Method of solvent spray impact cleaning utilizing a hand directed pump nozzle for impact spraying of parts, by eye through a viewing window, and an enclosing chamber containing the parts in a manner whereby the zone for solvent spray by the pump nozzle is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or vapors rising at the spraying temperature. The internal air of the chamber and all solvent are continually recycled electrically by blower and pump for re-use after the latter, once in an operative status, are then activated according to the washing procedure. The recycled air re-enters through a blower nozzle directed so that it clears the window.

Abstract: Hot tank washer for cyclically repeated temporary intervals of spray cleaning operation, and controls therefor automatically coordinating operation of the system initiating switch, a heat interruption switch, and a door switch with one another and with other system operations. The heat interruption switch inherently puts the hot tank heating on standby momentarily with no power, incident to the user operating the spray system initiating switch; the spray system comes on under full power, incident to, and only contingent upon, the hot tank heating being first put on standby with no power; the spray system and a washer defogger system are automatically secured from operation, incident to the door switch being operated by opening of an access door allowing new work to be put into the washer.

Abstract: High pressure washing method utilizing a hand directed spray nozzle for cleaning parts, by eye through a viewing window, and an enclosing chamber containing the parts in a manner whereby the zone for solvent spray by the nozzle is closely confined within the enclosure so as not to expose the operator or the outside environment to the liquid runoff of the solvent, or to the sprayed particles thereof, or to solvent steam or rising vapors. With a view to ecology considerations, and in addition to the concern to confine the contaminant from escaping into the environment, the internal air of the chamber and all solvent are continually recycled for re-use according to the washing procedure. Such procedure entails, in the practice of the instant invention, keeping down the vapor concentration by defogging the chamber air, and simultaneously defogging the viewing window through blanketing same by the defogged air as recycled.

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: 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: 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: 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 operated by engaging one hydraulically operated clutch while simultaneously disengaging another hydraulically operated clutch includes circuitry responsive to the hydraulic pressure applied to the just engaged or on going clutch for preventing the disengagement of the other clutch until the hydraulic pressure applied to the just engaged clutch exceeds a predetermined level indicating that the just engaged clutch has engaged.

Abstract: The automatic alternating marker system is adapted for use with an agricultural planter assembly which has a plurality of planter units, which is adapted to be mechanically and hydraulically coupled to a tractor, and which has hydraulically actuated, first and second extendable markers, each mounted on one side of the planter assembly. Each marker is used to mark, respectively, the track that a tractor wheel should follow on a return planting sweep of the planter assembly for planting properly spaced adjacent rows after the planter assembly has made a first sweep to plant a plurality of rows. The system includes an electrical control circuit for causing extension of the first marker and retraction of the second marker upon the raising of the planters and the turning of the tractor 180.degree., and for causing extension of the second marker and retraction of the first marker upon the next raising of the planters and the next turning of the tractor 180.degree..

Abstract: An improvement in an articulated tractor which has front and rear sections pivotally connected along a vertical axis of articulation. Each of the sections is supported by a pair of ground engaging wheels that are drivingly connected to a differential input by a differential and an axle. The improvement includes an engine mounted on the front section forward of the front section differential with the engine's output element disposed longitudinally of the tractor. The engine's output element extends rearwardly toward the front section differential and is vertically positioned in close proximity to the top of the front section differential. The improvement also includes a power train connected to the engine's output element which provides for the transmittal of engine power rearwardly from the engine output element along a first path over the front section differential, to and through the axis of articulation.

Abstract: Crawler tractor adapted for stepless hydromechanical or electromechanical steering by driving. The tractor, in which opposite axles have interposed solid axle steering drive means, is steered by means of clutches disposed one between the drive means and each axle for primary mechanical drive, and a secondary variable ratio hydrostatic bidirectional drive interconnecting the axles.

Abstract: A multi functioning hydraulic transmission control circuit including interacting valve mechanism parts which, in response to a shift being called for in a clutch-cylinder-controlled multi-speed transmission, inaugurate a fill pressure flow to the clutch cylinders concerned, prior to the subsequent fluid pressure rise effected therein; thereafter, upon completion of the fill, the parts modulate pressure rise of the hydraulic clutch fluid from and at approximately actual clutch fill pressure up to, and remaining at, the final pressure of engagement.

Abstract: Hydrostatic tractor's drive and braking system, particularly one controlled, first, by a tractor safety lock lever which, when put "on," both neutralizes the engine-driven, variable ratio hydrostatic system for positively preventing drive and also sets the brakes for simultaneously positively preventing rolling and, second, by a two-stage brake pedal which is overcontrolled by the safety lock lever whenever the lever is "on" and which operates initially to intensify engine braking by increasing the hydraulically fixed ratio of the hydrostatic drive and its rate of dynamic dissipation of power, and which operates finally to neutralize drive and set brakes in an overlapping sort of way with the function of the safety lock lever and exactly the same as the safety lock lever does whenever "on.

Abstract: Clutch-brake steering unit having hydraulically actuated cylinders which are adapted for controlling same to control rotation of a track-drive sprocket in a crawler tractor, and which are under control of a clutch-brake steering valve mechanism. A bore in the valve is common to and receives both an independently slidable hydropotentiometer spool precisely providing a master setting pressure, and an independently slidable metering spool providing a single pressure signal always hydraulically matched with the precise master setting pressure. A clutch cylinder and a brake cylinder provided in the unit have an inlet-outlet port in common, and are so arranged on a spring-applied-brake, hydraulically-applied-clutch basis that the generated single pressure signal when applied to the inlet-outlet port alternately operates the cylinders to apply the brake and release the clutch, or to release the brake and apply the clutch, or by proper modulation to partially engage either, i.e.

Abstract: Booster providing both hydraulic feed-back and hydraulic feel-back in a two-stage operation in which we boost-brake a vehicle. Concentric, nesting, inner and outer control parts include, as the sliding outer part, a brake-pedal-connected input signal spool or sleeve for developing a desired signal pressure varying linearly along the length of, and therefore according to the sliding position of, the sleeve; the inner part constitutes a captive, telescoping metering spool with its ends in corresponding ends of the spool sleeve.

Abstract: A sectionalized panel of metal for guarding exposed windows on vehicle cabs and passenger compartments to protect from vandalism such as stone throwing. It serves on the outside as a stone-shield or night guard particularly for tractor cab windshields and is comprised of overlapping, interlockable, metal cladding plate sections which resemble a closed louver when installed and which are readily detachable and are hung below the windshield on the outside of the tractor cab when stored.

Abstract: For inclusion as spacer between the confronting faces of first and second axially spaced apart members mounted for limited angulation about a common axis, the first member having a seal recess formed in one face, the second member having an end face opposite the seal recess, the improvement of: a laminated torsielastic thrust bushing consolidated in the recess as a one-piece part therein, with its nonmetallic laminae so uniformly thin that the part in the axial direction is a substantially incompressible composite piece.

Abstract: A multi-functioning hydraulic transmission control circuit including interacting valve mechanism parts which, in response to a shift being called for in a clutch-cylinder-controlled multi-speed transmission, inaugurate a fill pressure flow to the clutch cylinders concerned, prior to the subsequent fluid pressure rise effected therein; thereafter, upon completion of the fill, the parts modulate pressure rise of the hydraulic clutch fluid from and at approximately actual clutch fill pressure up to, and remaining at, the final pressure of engagement.