Abstract: An automatic closing spout for a combine grain auger which opens when there is grain passing through the auger comprising a pivotally mounted collecting bucket attached adjacent the discharge opening of the auger with counterweighted arms extending outwardly from the collecting bucket to hold the bucket in a closed position, but insufficient when the bucket is full of grain from dumping and allowing grain to discharge from the auger housing and including a secondary closing means in the form of a permanent magnet which holds the collecting bucket in its closed position to prevent premature discharge therefrom.

Abstract: A normally closed spool type solenoid-controlled valve which changes its opening in proportion to the amount of current supplied to the solenoid. The spool which blocks the valve opening in an overlapping relation is held in a closed position by a dual spring design having differing spring rates wherein the lighter spring holds the spool in an overlapping closed position.

Abstract: A gas extractor for processing crude oil to provide the energy to power an internal combustion engine driving a conventional oil pumping unit. the extractor comprises a vertical tank, an extractor chamber, an exhaust gas pipe passing through the tank with a plurality of baffle pans mounted longitudinally thereon; a crude oil reservoir in the top of the tank, valve means controlling the rate of oil flow from the reservoir to the upper baffle pan; means to vary the amount of exhaust gases passed through the exhaust pipe to control the temperature of the extractor chamber; a gas outlet passage, air inlet passage and oil drain passages in the extractor chamber, each adjacent baffle pan being oppositely tilted and having a drain opening at its lower side whereby the oil passing through the extractor flows across each adjacent oil pan before being drained from the extractor.

Abstract: A meter-out load sensing hydraulic system controlling one or more motors, supplied by a variable displacement pump through a directional control valve. The compensating means of the pump senses pressure and flow on the discharge or return side of the motor to determine the pump cam plate position. The signal line connecting this discharge side of the motor to the compensating means is also supplied with a low pressure signal flow which causes the pump to standby at a low pressure level in a neutral valve position or when metering down a gravity load.

Abstract: A cervical traction device utilized on conventional traction tables which applies a tractive force to the back of the patient's skull approximate the occipital bone through the use of two V-shaped arms which are adjustably positioned behind the patient's head and mounted on a sliding carriage which has adjustable weights attached thereto. The carriage in turn slides on a stationary track which can be vertically and laterally adjusted to vary the flexion-extension angle.

Abstract: A sequencing valve utilized with a tractor-propelled planter having two row arms which pivot downward to the ground in an alternating sequence as the planter changes directions in the field. The sequencing valve is connected with the conventional hydraulic system which raises and lowers the planter at the end of each row so as to automatically lower alternate marker arms. This is achieved by pressurizing opposite ends of the sequencing valve spool for longitudinal movement through a cam means, causing the spool to rotate during movement in one direction whereby alternating lowering of the planter arms is achieved each time the planter is hydraulically lowered to the ground.

Abstract: A hydraulic stabilizing device utilized to dampen the sway of railway cars comprising a double acting hydraulic cylinder having a center position wherein the fluid is locked in the opposing chambers of the cylinder except for high pressure relief once the piston is forced out of the center position as the railway car traverses a curve. Longitudinal groove means in the cylinder barrel opens up a restricted bypass across the cylinder piston so as to allow a conventional dampening function at all other positions of the cylinder except the center position. The stabilizer cylinder also includes a concentrically spaced sleeve surrounding the cylinder forming a precharged accumulator chamber for resupplying either of the cylinder chambers through check valves in the cylinder heads.

Abstract: An improved rephasing master cylinder in which the cylinder wall approximate the end of the cylinder has a longitudinal bleed passage in the cylinder wall at one end connected to a lateral passage opening into the forward cylinder chamber while the opposite end of the longitudinal passage connects with the rearward chamber of the cylinder when the cylinder piston is located therebetween. This longitudinal bleed passage permits the restricted flow past the master cylinder piston when the piston is nearing and at the end of its stroke, thereby causing both master and slave pistons to complete their respective strokes.

Abstract: A bird feeder stand adapted to support all types of feeders and planters having a water-filled base member supporting a vertically extending support post from the center thereof. The feeders are hung from cantilevered arms while their bottoms are supported from lateral movement by adjustable brackets slidable on the support post.

Abstract: A relief valve with a low hysteresis closing curve with a fixed seat and a spring-biased poppet which is guided for longitudinal movement by an axial guide sleeve and aligns with its seat by pivoting about a fixed point through a small angle of rotation.

Abstract: The invention is an improved pressure compensating flow limiting valve which maintains an optimum performance curve at differing flow rates. The invention is the specific placing of a vent passage in the valve spool immediately downstream of the fluid jet passing across the spool in a metering mode with the vent passage connected to one of the servo chambers which positions the spool. The effect of the exiting fluid jet draws some fluid from the vent passage thereby dropping the pressure level in that servo chamber sufficiently to offset certain dynamic forces on the spool and balance the spring forces on the spool with these forces regardless of the flow rate through the valve.

Abstract: A self-leveling series type hydraulic system including boom and bucket valves which separately control boom and bucket cylinders and a flow divider valve positioned in the exhaust flow path from the rod end of the boom cylinder. The flow divider valve splits the flow sending a portion of it to the cap end of the bucket cylinder so as to maintain the bucket in a level condition during raising of the boom with the remaining flow connected to one of the boom valve motor ports whereby the bucket valve can be separately actuated concurrent with the boom valve and supplied with oil so as to override the self-leveling function if desired.

Abstract: A cryogenic fuel system for an internal combustion engine utilizing both the liquid and vapor of a saturated liquid fuel comprising an insulated storage tank having inner and outer walls a vapor tube passing through the walls of the tank with its open end positioned approximate the top of the tank above the liquid level and its opposite end connected to the engine; a liquid entry and exit tube passing through the walls of the tank with a portion of the tube at or above the open end of the vapor tube, the liquid tube extending downwardly to the bottom portion of the tank to its open end; a first pressure-actuated valve means positioned in the vapor tube having an open or closed position which opens the vapor tube to the engine when the tank pressure exceeds a predetermined pressure; and a second valve means in the liquid tube having an open and closed position which opens the liquid tube to the engine when the engine is running.

Abstract: A trailer for transporting root-balled trees comprising a plurality of cone-shaped receptacles having an open bottom and being pivotally mounted to the frame of the trailer about a horizontal axis so that the trees may be held in a reclined position during transit.

Abstract: A load responsive system employing a fixed displacement pump and a variable displacement pump in a parallel circuit as a source of fluid in an open-center load sensing system. The load response control valve includes an unloading spool which is flow responsive in the operative positions of the control valve and maintains a constant .DELTA..rho. across the control valve by dumping the pump flow to reservoir; the control valve .DELTA..rho. being greater than the .DELTA..rho. of the pump compensator means so that the variable displacement pump will remain destroked until the system utilizes the full flow of the fixed displacement pump at which time the variable displacement pump strokes-out upon demand.

Abstract: A screw-type fine material classifier or washer having externally mounted support bearings with the ends of the screw extending through the end walls of the tank and waterproof seals. The bearings and seals being adjustable so that the screw may be moved both vertically and horizontally to adjust the clearance between the screw and the belly pan of the washer.

Abstract: A warm-up valve in a load responsive hydraulic system which connects the pump discharge pressure with the pump compensator while bypassing to reservoir a partial capacity of the pump. When proper reservoir temperature is reached, a thermostatically controlled solenoid closes the warm-up valve causing the pump to return to low pressure standby.

Abstract: A lightweight portable dental examining chair constructed from a series of panels hingedly joined in triangular patterns to form a rigid structure with an adjustable position backrest and a pair of sling-like armrests. A single horizontal adjustment on the base of the chair varies the tilt angle of the backrest while retaining the head of the patient in the same relative horizontal position.