Abstract: A device for generating electrical energy from mechanical motion includes a surface float and at least one force modifier disposed at least partially within the interior of the surface float, the force modifier to receive an input force at a pumping cylinder and apply a modified force to a generator through a driving cylinder. The pumping cylinder or the driving cylinder is a tandem cylinder.

Abstract: A diesel engine with an associated rotary pump pumps a fluid in a path of travel. A linear cylinder motor oscillates a disc. First and second multi stage cylinder pumps with associated attachment members operate in response to the movement of the disc. A hydraulic motor with a generator and pressure tank has a line for feeding fluid. An electric motor with a pressure tank and lines feeds fluid from the multi stage cylinder pumps to the pressure tank and feeds fluid from the pressure tank to the generator for powering the generator.

Abstract: An electrohydrostatic actuator including an unbalanced area actuator whereby movement of an actuator piston causes a greater change in displacement on a first side of the actuator piston having a first area than on a second side of the actuator piston having a second area. The actuator includes a four-port, dual displacement hydraulic pump having a first pair of ports and a second pair of ports. If an axial piston pump is used, the pistons may be arranged in first and second rings of pistons arranged concentrically about a central axis. The pump has a port plate with a first pair of ports associated with the first ring of pistons and a second pair of ports associated with the second ring of pistons. At least one of the first pair of ports and at least one of the second pair of ports are connected to the first side of the actuator piston. At least one of the first pair of ports is connected to the second side of the actuator piston.

Abstract: The invention relates to a percussion device comprising two percussion pistons alternately making a percussion motion and a control valve for controlling the percussion pistons. The control valve (7) comprises a slide (8) affected by a force so that the slide is generally in a first position, but moves at the end of the percussion motion of the first percussion piston from the first position to a second position and correspondingly back to the first position at the end of the percussion motion of the second percussion piston (4).

Abstract: A self-propelled combine harvester having a mechanically actuated directional control valve for a hydraulic piston-cylinder unit used for driving the cutter bar in an oscillatory manner. A switching bracket is used to axially move the mechanically actuated directional control valve from a first end position to a second end position and from the second end position to the first end position. A latch is used to periodically latch a piston valve stationary. A first plunger and second plunger are alternatively and axially moved by a first spring and second spring. The first plunger and the second plunger alternatively move the valve piston from the first end position and the second position and from the second position to the first position. The valve piston will be released from the first end position or the second end position one end position from which it was arrested or latched.

Abstract: A fluid control system (50) is provided for a work machine (10) having first and second compacting drums (14,16). First and second hydraulic motors (28,32) are connected in series and power first and second vibratory mechanisms (26,30) located within the first and second compacting drums (14,16). A control valve (60) supplies pressurized fluid to the first hydraulic motor (28). The pressurized fluid is transferred through a bypass circuit (74) around the second hydraulic motor (32). A sequencing device (80) closes the bypass circuit (74) transferring the pressurized fluid to the second hydraulic motor (32) after actuation of the first hydraulic motor (28).

Abstract: A dual hydraulic oscillator for the reciprocating cutter of an agricultural machine is provided. The dual oscillator has two pistons reciprocating in opposite directions and a single pilot valve, with resynchronization performed twice per cycle of the oscillator. Also provided is a single or dual hydraulic oscillator comprising a cylinder having first and second opposed ends. A reversing pilot valve is provided for controlling flow of pressurized fluid to at least one of the first and second cylinder ends. The pilot valve includes first and second pilot passages for controlling the reversing operation of the pilot valve. A piston reciprocates between first and second positions in the cylinder. The piston has an inner bore. The bore has first and second circumferential logic grooves. An inner logic mechanism is slidably received in the bore.

Abstract: The piston rods (10, 12, 14) of three linear hydraulic motors (M1, M2, M3) are stationary and include fluid pressure passageways (40, 52, 42, 54, 44, 56) which direct fluid pressure into and out from working chambers (16, 34, 18, 36, 20, 38) on opposite sides of piston heads (22, 24, 26). Movable cylinder barrels (16, 18, 20) are connected to a load, e.g. floor members (FM1, FM2, FM3) of a reciprocating floor conveyor (FIG. 18 ). The outer ends of the piston rods (10, 12, 14) include balls and the balls include ports (46, 58, 48, 60, 50, 62) through which fluid pressure is delivered or removed. Associated with each port is a limit valve LV1, LV2, LV3, LV4, LV5, LV6. Limit valves (LV1, LV2, LV3) are pushed into an open position by a retraction of the motors (M1, M2, M3). Limit valves (LV4, LV5, LV6) are pulled into an open position by extension of motors (M1, M2, M3). The limit valves (LV1, LV2, LV3, LV4, LV5, LV6) include springs biasing them into closed positions.

Abstract: A slurry pump has slurry hopper and dual pumping cylinders. The slurry pumping members are driven by opposite-phase actuators. Each actuator has a rigid-hollow-stem partition dividing the space between the actuator plunger and the cylinder into two drive chambers of different areas selectively supplied with pressurized fluid to drive the plunger with a selected force and speed. An associated valve shuts off flow to one of the drive chambers and is controlled at any given time to occupy the same position as a corresponding valve of the other actuator. The valves coordinate supply of fluid to corresponding drive chambers on alternate strokes of two actuators.

Abstract: A piston type expander/prime mover utilizes a plurality of pairs of cylinders mounted on a rotatable cylinder support. Each cylinder has an open end and a closed end and each pair of cylinders has their open ends disposed in spaced, opposed relationship. A pair of pistons respectively cooperate with the pair of cylinders, and each piston has a connecting rod pivotally secured thereto and projecting through the open end of the respective cylinder. The two ends of the connecting rods are in turn pivotally connected to a lever arm which is secured to the movable element of a first unidirectional (over-running) clutch which has its stationary element secured to a stationary shaft. A first load transmitting element is secured to the rotatable element of the unidirectional (over-running) clutch. Valving is provided in the closed end of each cylinder to permit a charge of pressured gas to be introduced into such closed end as the respective piston approaches such closed end.

Abstract: A pump jack drive apparatus includes a pair of hydraulic cylinders connected to a walking beam of the pump jack for reciprocating the horsehead, and a pair of microswitches or proximity switches which are closed by the walking beam at the limits of the stroke thereof for controlling such stroke. The cylinders are driven and controlled by a pump and control unit which includes a valve for feeding hydraulic fluid to one or the other of the hydraulic cylinders, a control cylinder for controlling the valve, and two solenoid operated control valves for controlling movement of the control cylinder in response to closing of the switches by the walking beam.

Abstract: A Gas Energized Engine System, according to the present invention, is adapted to drive a piston type gas energized engine having a piston and cylinder system that is operatively interconnected with a crankshaft that transmits rotary force to any suitable load. The piston type engine is provided with gas intake and exhaust systems. The gas intake system is interconnected with a gas supply system having a high pressure supply vessel and an operating pressure supply vessel that are interconnected by a pressure regulator. A converter system which is an engine and compressor system that is separate from the gas energized engine, and has a gas inlet that receives the exhaust of the gas exhaust system of the engine and functions to compress the exhaust gas to a high pressure and communicate the high pressure to the high pressure vessel of the gas supply system and to modify the exhaust atmosphere of the gas energized engine.

Abstract: A hydraulic engine having a frame on which a crankshaft is rotatably mounted between a plurality of cylinders. The individual cylinders are rockingly mounted on the frame arranged as opposed pairs of cylinders and their piston rods are operatively connected to cranks positioned 90.degree. apart upon the crankshaft. A power take-off shaft is also journalled on the frame and a drive train operatively connects the crankshaft to the power take-off shaft. The cylinders are connected by a fluid circuit to a motor-driven pump and included in the circuit are individual distribution valves for the cylinders. Operating plungers of the valves are connected by rods to eccentrics carried by the crankshaft and circumferentially positioned to extend and retract the several piston rods in a sequence which will rotate the crankshaft and deliver usable power to the takeoff shaft.

Abstract: The present invention relates to an hydraulic motor adapted to be used in automobiles and other vehicles and which is derived from a standard reciprocating piston engine. Instead of igniting a fuel/air mixture, the present invention supplied hydraulic fluid under pressure to one or more cylinders of the engine to drive the pistons during their power stroke. The present invention also provides apparatus for releasing the pressure of the hydraulic fluid in the cylinders to allow the pistons to reciprocate.

Abstract: A control system for hydraulic presses comprising a plurality of press rams, an intensifier having a primary chamber which is connected by a supply conduit to a pump, and a valve which is associated with the primary chamber and when open permits the liquid under pressure to return through a return conduit into a reservoir, the primary chamber being constantly supplied by the pump with high-pressure liquid at a constant rate, and the valve associated with the primary chamber being controlled to move in synchronism with the reciprocating motion of the press rams so that it is closed during the forward stroke and open during the return stroke of the press rams.

Abstract: An illustrative system is disclosed for use as a rotary-drive engine, utilizing combustible fuel and a hydraulic system of energy conversion. An engine block defines a pair of expansion cylinders (combustion chambers) and an associated concentric pair of hydraulic chambers. The chambers matingly receive unitary piston structures for phase-opposed reciprocal movement.The hydraulic working chambers communicate with each other and can exhaust high pressure fluid through a control valve structure for drive power. Exhausted fluid is replaced in volume by low-pressure spent fluid. The body of the fluid contained in the hydraulic working chambers along with the piston means and springs connected to the engine block define an oscillatory system which is resonant at the operating frequency. That consideration, along with the absence of lateral loads on the pistons, results in relatively high efficiency.