Abstract: Priority valve system with pressure-flow compensation and signal control having first, a restricted orifice which can be satisfied when flow requirements therethrough are sufficiently large in combination with, second, a closed center primary control valve equipped with an hydraulic detent unlatch mechanism and hydraulically disposed downstream of the orifice to receive the flow directed thereto by the orifice, all to provide appropriate signals controlling the priority valve.Through this intervening, novel two component control combination, the priority valve is controlled to supply flow to a priority load and, in addition, has an auxiliary outlet chamber connected to an auxiliary motor with the purpose to cut off the auxiliary chamber flow whenever the priority flow is sufficient to satisfy only the restricted orifice.

Abstract: A hydraulic system for a drilling apparatus where torque is transmitted to drill pipe, a plurality of thrust cylinders move the torque transmitter back and forth along the drill pipe axis, and a hydraulic motor supplies torque to the torque transmitter, includes: a first drive pump for supplying hydraulic fluid to the motor; a first valve between the first drive pump and motor for selectively controlling the direction of fluid flowing to the motor; a second drive pump for selectively supplying fluid either to the thrust cylinders or motor; a second valve between the second drive pump, on one side, and the thrust cylinders and motor, on the other side, for selectively diverting fluid flow from the second pump either to the thrust cylinders or the motor; a third pump for supplying fluid to the thrust cylinders; a third valve connected between the second and third pumps, on one side, and the thrust cylinders, on the other side, for selectively controlling the direction of fluid flowing to the thrust cylinders; a

Abstract: An apparatus is provided which is adapted to deliver or absorb variable amounts of torque or to deliver variable quantities of an incompressible fluid at a predetermined pressure. The device comprises a positive displacement pump capable of pumping a compressible fluid, an incompressible fluid or a mixture of a compressible fluid and an incompressible fluid together with appropriate pressure control and flow control mechanisms, check valve mechanisms and interconnecting duct means.

Abstract: A self-reversing hydraulic control system for use with a device to be driven in opposite directional modes, especially a self-reversing pump driven by such a device. The system depends upon a flow sensing element disposed to sense flow associated with movement of the driven device and adapted to generate a stop signal responsive to the termination of such flow. A means responsive to the stop signal is then effective to shift the system from one directional mode to the other. Also featured is a sensor disposed to receive and transmit hydraulic fluid under pressure to drive the device, stoppage of the flow adapted to cause the sensor to shift position and to transmit pressurized hydraulic fluid pressure, as the stop signal via a hydraulic line. In preferred embodiments the self-reversing hydraulic control system has a two-position 4-way valve which is shifted in position by the hydraulic stop signal.

Abstract: In an apparatus for driving fastening elements, such as bolts and nails, into receiving material, a first or driving piston is mounted in a first chamber through which it is axially displaceable. A pressure converter arrangement is connected to an inlet to the first chamber for supplying the compressed air required for displacing the first piston for driving in a fastening element. The pressure converter includes a storage chamber, a second chamber in communication with the storage chamber and a third chamber. A double headed piston has one head in the second chamber and the other head in the third chamber. The third chamber has a much greater transverse cross-sectional area than the second chamber. Compressed air supplied to the third chamber compresses air in the second chamber which is directed into the storage chamber. From the storage chamber, the compressed air is charged into the first chamber for driving the first piston forwardly for inserting the fastening element.

Abstract: An agricultural tractor is provided with a hitch and draft control system hydraulically related to a plurality of other hydraulic functions. The hydraulic fluid distribution is preferenced by a priority valve including a variable orifice in series with the hitch and draft control system. The variable orifice acts as a raise rate control device and also as a controlling member for a load sensing variable displacement pump.

Abstract: A controller for fluid pressure operated devices such as vehicle power steering systems. The controller is of the type having a primary, rotatable valve member and a follow-up valve member and including a fluid meter having a metering member coupled to the follow-up valve member. The valving defines a central reference plane perpendicular to the axis of rotation of the valving and the various ports and passages defined by the primary and follow-up valve members are generally oppositely and equally disposed about the central reference plane. This valving symmetry reduces internal leakage and steering wheel precession. The controller includes a load signal circuit, including a pair of load sensing grooves oppositely and equally disposed about the central plane.

Abstract: A high torque hydraulic power plant is operated by electrical power through the use of a hydraulic pump, opposing double-ended cylinders containing double-ended pistons and appropriate cycling valve means. Pressure is maintained in the system by a constant pneumatic force applied to the full piston side of each opposing double-ended piston.

Abstract: A hydraulic brake booster includes a housing which substantially defines a pressure chamber and the housing slidably supports a control valve for communicating pressurized fluid to the pressure chamber. A piston is movably disposed within the housing to move in response to pressurized fluid within the pressure chamber and the piston substantially defines a storage chamber located inside the piston. A charging valve communicates pressurized fluid to the storage chamber and a relief valve vents the storage chamber to the pressure chamber when the pressure stored in the storage chamber is above a predetermined value. An input member cooperates with the piston to define an actuating cavity which communicates with the relief valve so that the input member is movable relative to the piston to pressurize the actuating cavity which causes the relief valve to open communication between the storage chamber and the pressure chamber.

Abstract: A hydraulic control system for distributing pressure fluid to at least two systems, that is a first system including a first pump supplying pressure fluid through a first conduit to a first consumer and a second system including a second pump for supplying pressure fluid to a second conduit, in which a plurality of multiple position valves are arranged, each movable between a neutral position providing free flow of fluid through the second conduit and at least one working position respectively directing pressure fluid to the additional consumer respectively connected to said plurality of multiple position valves. A regulating valve is located in the first conduit and the second conduit is connected by a cross-conduit to the first conduit at a point upstream of the regulating valve therein.

Abstract: A hydraulic power pack having a prime mover, at least one hydraulic pump, a reservoir and associated valving and hydraulic circuitry, in which each of the components is mounted on one of two parts of a frame. The two parts of the frame are hinged together at one side, thereby enabling the frame to be opened to allow access to the components for maintenance.

Abstract: The present invention provides a new method of obtaining energy without using fuels. Basically the device consists of a conveyor belt that contains a continuous arrangement of cells or pockets that are open in the outward direction perpendicular to it's motion. The conveyor belt is set in motion by the effect of natural water flow or currents upon the hinged flaps that are attached to it. The cells when pointed in a downward direction, will carry air down to great depths and release the air at the point at which the belt turns beneath the water and when the cells are pointed in an upward direction. This highly compressed air can then be captured in a container and the stored energy thusly obtained can be used by gradually releasing it for the purpose of driving a turbine wheel.

Abstract: A wind machine has a tower frame formed by four converging beams. At the top of the tower is a gear head connected to a wind driven rotatable multibladed rotor. Connected to the gear head is a vertical shaft which is reciprocated vertically as the rotor rotates. Bearings above and below the gear head enable the gear head to drive the shaft in both downward pushing and upward pulling modes. The system includes a counterbalance assembly having tubular arms at opposite sides of the vertical shaft. The arms are slidably carried by sleeves pivoting in vertical planes on stationary pillow blocks secured to the tower frame. Inner ends of the arms are connected to the vertical shaft. Weights inside the arms are adjustably positioned on threaded rods, and both rods and weights can be locked in place for adjusting the counterbalancing effect of the assembly with respect to the vertical shaft and load.

Abstract: A cylinder is arranged to pump hydraulic fluid into a pressure accumulator. The stored hydraulic fluid operates a hydraulic motor to drive an alternator to generate electric power. The cylinder may be a single acting cylinder having a piston rod depressed by the weight of passing traffic on a railroad track or highway, or the cylinder may be a double acting cylinder having a piston rod reciprocated by a windmill, whereby otherwise wasted energy is converted into productive energy.

Abstract: Various low grade forms of energy, particularly superadiabatic ground level air, are used to power a whirlwind. The whirlwind is tethered in a fixed place by confinement of the formative whirl from which the whirlwind arises, permitting the energy contained therein to be harnessed into useful forms of energy.

Abstract: A hydrostatic transmission includes a reversible, variable displacement pump having a swashplate actuator controlled by a pilot-operated displacement control valve. A manually operated displacement control lever is manipulated to opposite sides of a neutral position to effect command signals for causing pilot operation of the displacement control valve to control movement of the swashplate in accordance with the command. A neutral control valve is coupled to the displacement control lever and is operated thereby to a neutral position, wherein it connects the swashplate actuator to sump, when the lever is moved to its neutral position.

Abstract: The apparatus of the present invention is comprised of transfer tanks which are located below the hydraulic head of a dam. Connected to the transfer tanks are air inlets extending from the transfer tanks to the atmosphere, and having check valves located therein. A water inlet and valve, interconnect the transfer tanks with the fluid behind the dam, and a water outlet and valve empty the transfer tank downstream of the dam. A storage tank is interconnected to the transfer tank by transfer lines having check valves at their transfer tank ends, and a turbine outlet extends from the storage tank to an air driven turbine. In one embodiment of the invention two transfer tanks and one open-bottomed storage tank are located on the upstream side of the dam at its base. In this embodiment water outlets pass from the bottom of the transfer tanks through the face of the dam.

Abstract: The drive of a hydraulic screw press comprises a power cylinder connected with the press slide by its movable member. The chamber of the power cylinder communicates with a pneudraulic accumulator provided with a device for its charging. The device comprises a pneudraulic cylinder with a distributor for communicating its under-piston hydraulic chamber alternately with the source of pressure and a low-pressure hydraulic line, and nonreturn valves for communicating the above-piston pneumatic chamber of the pneudraulic cylinder alternately with the pneumatic line and the pneumatic chamber of the pneudraulic accumulator. This ensures self-sufficiency of the drive of each hydraulic screw press, and the required pressure of gas in the pneudraulic accumulator with a comparatively simple design of the device for charging its pneumatic chamber.

Abstract: A transmission control system (10) for a transmission including a torque converter (66) has fluid inlet and fluid outlet passages (64,80) connected to the torque converter (66), a pressure regulating valve (20) for relieving fluid from a pressure source (12,16) to the inlet passage (64) of the torque converter (66), and a flow limiting passage (96) directly connecting the inlet and outlet passages (64,80) for continually bypassing fluid past the torque converter (66) and controlling the pressure drop thereacross.

Abstract: The reciprocating motion of the power piston of a Stirling cycle engine is converted to rotation of an output shaft by means of a gimbal-mounted wobble plate. The output shaft has a cylindrical bearing surface whose axis is at an acute angle to that of the shaft and which surface rotates within the nonrotating wobble plate. The wobble plate oscillates about its mounting axis within the gimbal, and the gimbal in turn oscillates about a third axis which is mutually perpendicular to and intersecting with the wobble plate mounting axis and the rotational axis of the output shaft. The power piston rod is connected to the gimbal to cause it to oscillate, which in turn induces rotation of the output shaft. The reciprocation of the displacer piston is phased to that of the power piston by means of a reciprocating slide which is connected to the displacer piston rod and driven by a ball-like cam and socket interconnection with the wobble plate.