Abstract: Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high-pressure fracturing operation may include providing a pump frame and a crankshaft. A plurality of first plungers may be connected to the crankshaft and may reciprocate in a first plane. The hydraulic fracturing pump also may include a plurality of second plungers connected to the crankshaft and positioned to reciprocate in a second plane. The first plane and the second plane may define a non-zero offset angle between the first plane and the second plane. The crankshaft may include a plurality of crankpins, and each of the crankpins may be connected to one of the first plungers and one of the second plungers. The first plungers may pump a first fracturing fluid and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.

Abstract: Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high-pressure fracturing operation may include providing a pump frame and a crankshaft. A plurality of first plungers may be connected to the crankshaft and may reciprocate in a first plane. The hydraulic fracturing pump also may include a plurality of second plungers connected to the crankshaft and positioned to reciprocate in a second plane. The first plane and the second plane may define a non-zero offset angle between the first plane and the second plane. The crankshaft may include a plurality of crankpins, and each of the crankpins may be connected to one of the first plungers and one of the second plungers. The first plungers may pump a first fracturing fluid and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.

Abstract: Systems and methods to enhance the flow of fracturing fluid into a wellhead during a high-pressure fracturing operation may include providing a pump frame and a crankshaft. A plurality of first plungers may be connected to the crankshaft and may reciprocate in a first plane. The hydraulic fracturing pump also may include a plurality of second plungers connected to the crankshaft and positioned to reciprocate in a second plane. The first plane and the second plane may define a non-zero offset angle between the first plane and the second plane. The crankshaft may include a plurality of crankpins, and each of the crankpins may be connected to one of the first plungers and one of the second plungers. The first plungers may pump a first fracturing fluid and the second plungers may pump a second fracturing fluid different from the first fracturing fluid.

Abstract: A low-energy and high pressure, hydraulic, pneumatic engine contains: a casing device, two main-cylinder devices, a holder device, two main-crankshaft devices, two recycle-valve devices, two swing-arm devices, two movable-valve devices, two recycle-cylinder devices, two recycle-crankshaft devices, and two umbrella-shaped gear devices. The engine operates without using gasoline or diesel, thus avoiding discharge of harmful substance or gas and pollution. The high pressure gas forces the hydraulic oil without using gasoline or diesel so as to start the engine, and the hydraulic oil recycles and reuses repeatedly, thus obtaining environmental protection. And the high pressure gas forces the hydraulic oil so as to circulate the hydraulic oil, and the communication of the low-energy and high pressure and the low pressure matches with the circulation space of the fluid operation to produce the torque, hence four strokes cycle of intake, compression, combustion and exhaust are not required.

Abstract: Systems for powering vehicles using compressed air and vehicles involving such systems are provided. In this regard, a representative system includes: a power source configured to power an air compression system, the air compression system comprising at least one air compressing piston; a compressed air storage system, comprising at least two storage tanks configured to store compressed air from the air compression system; a valve configured to control release of air from the compressed air storage system into a rotor system; the rotor system comprising a first air jet configured to direct the released air into a plurality of paddles located about a circumference of at least one rotor, thereby turning the at least one rotor.

Abstract: A plunger pump, includes: a plunger pump unit including a pump chamber and a plunger for pressing a hydraulic fluid in the pump chamber to perform a discharging operation of the hydraulic fluid; a motor; and a cam portion driven by the motor to rotate and press the plunger. The cam portion has at least two discharge regions for pressing the plunger and a suction region formed between the discharge region. The plunger performs the discharging operation two times or more by one rotation of the cam portion.

Abstract: A power system comprising a cylinder assembly and a power providing system. The cylinder assembly comprises a cylinder, a piston, a connecting rod and a crankshaft. The cylinder is pivotally coupled to a frame and includes opposing end walls. The piston is slidably positionable in the cylinder between the opposing end walls. The connecting rod is coupled to the piston. The crankshaft is rotatably coupled with the connecting rod. The power providing system comprises a vacuum providing assembly, a manifold, a valve actuator arm and a cam. The manifold is coupled to the vacuum providing assembly and with the cylinder selectively between the piston and a first opposing end wall and between the piston and the second opposing end wall. The cam is coupled to the crankshaft and the valve actuator arm.

Abstract: A compressed gas engine includes a plurality of reciprocating pistons within cylinders, the pistons being driven by compressed gas from a source tank. Intake and exhaust valves selectively open to direct compressed gas to the piston to drive the piston, and to exhaust air, respectively. The valves are opened by a lift rod in engagement with cams on a crankshaft, and are closed by the compressed air.

Abstract: A load transfer device for use with tandem mounted actuators. The load transfer device includes an actuator coupling assembly and a ground connection assembly. The actuator coupling assembly connects the first actuator to the second actuator and includes a movement apparatus. The movement apparatus is configured to allow the housing of the first actuator to move relative to the housing of the second actuator. The ground connection assembly is associated with the actuator coupling assembly and movably connects the first and second actuators to a rigid support structure. During a load transfer operation, the actuator coupling assembly transfers an unequal load from the first actuator to the second actuator. In particular, the movement apparatus allows the first actuator to move relative to the second actuator. Further, the actuator coupling assembly is configured to transpose movement of the first actuator into a forced, reciprocal movement of the second actuator.

Abstract: A fluid motor for converting reciprocation of a piston within a cylinder to rotation by a crankshaft includes a valve for supplying a fluid to the cylinder and discharging the fluid therefrom. The valve comprises a rotary valve member rotatable with the crankshaft and a fixed valve body slidably in contact with the rotary valve member. When the motor stops, at least one-half portion of a fluid intake groove formed in the rotary valve member is positioned at one side, toward a direction opposite to the direction of rotation of the rotary valve member, of a position opposed to a cylinder connection port formed in the fixed valve body so that a sufficient amount of pressure fluid can be supplied to the cylinder at the start when the motor is initiated into operation again.

Abstract: Adiabatic positive displacement gas cycle machinery is designed with explicit control of the heat flow between the gas and the walls. The control is achieved by maintaining near-laminar flow and a small wall area to volume ratio. The most stable near-laminar flow in a cylinder is an axial vortex because of symmetry, and hence the induction port design should establish an axial vortex and a low velocity. Induction and exhaust port designs to achieve this flow are applied to a vane pump, an adiabatic air compressor, a diesel engine, and two and four stroke Otto cycle engines. The gain in thermal efficiency for these designs can be significant, up to a factor of 2, since the largest inefficiency in nearly all positive displacement machinery is imperfect control of heat flow.

Abstract: A valving mechanism for use in machines such as internal combustion engines, steam engines, gas compression engines or air compressors. The mechanism employs a piston valve reciprocating within a cylindrical chamber under the direct action of cam surfaces carried upon a gear-driven flywheel. The cylindrical valve chamber carries a plurality of spaced apart ports, which are interconnected with the cylinder of the machine and with intake and exhaust systems. The machine has a piston reciprocated within the cylinder by means of a crank shaft which carries a crank shaft gear which interconnects with and drives the flywheel gear. One side of the flywheel gear carries cam surfaces which move the piston valve between the several positions required during the compression and exhaust and intake cycles of the machine. The valve chamber is mounted, transversed to the cylinder and in parallel with the crank shaft.

Abstract: An air driven vehicle utilizes pressurized air contained in storage tanks for actuating double-acting cylinders which in turn transmit a driving force to an axle of the vehicle. The compressed air in a first air tank under high pressure is fed to a first actuating cylinder so as to drive a crank which operates a main drive gear in communication with an axle gear attached to the vehicle axle. Upon a reversal of movement of the piston contained in the first actuating cylinder, a supply of exhaust air is directed from the cylinder to a second air pressure tank in which the exhaust air is collected under a lower pressure than the air contained in the first air pressure tank.

Abstract: A unique hydraulic circuit is provided for converting rectilinear motion to rotational motion about an axis through the use of two pivotally mounted hydraulic motors. The hydraulic motors are pivotally interconnected between a pivoting member and a fixed member. A source of hydraulic fluid under pressure is directed to each hydraulic motor by a conduit system incorporating a flow control valve and a sequencing valve. The flow control valve selectively delivers fluid power to the hydraulic motors to rotate the pivoting member in one direction or the other. The sequencing valve senses the angular position of the two hydraulic motors and redirects the flow of fluid to the hydraulic motors in such a manner as to maintain the torque applied to the pivoting member relatively constant. The sequencing valve acts to redirect the flow of hydraulic fluid to the hydraulic motors so that only one of the hydraulic motors is pressurized at the end of the arc of swing of the pivoting member.

Abstract: A fluid engine for use in pneumatically operated toys such as wheeled vehicles or airplanes. The engine housing has a fluid input cavity which is in continuous fluid communication with a source of compressed air, a fluid delivery cavity which is in continuous communication with a piston cavity bounded by a movable piston mounted in a cylinder member and which is separated from the fluid input cavity by a wall having a valve opening therein, and an open-ended exhaust cavity which is separated from the fluid delivery cavity by a wall having an exhaust opening therein. A valve rod with a tapered end is movably housed in the exhaust cavity to open the valve opening and close the exhaust opening during the piston's power stroke, and to close the valve opening and open the exhaust opening during the piston's exhaust stroke. The valve rod can be operatively connected to the piston to act in synchronism with it either by use of a cam or by use of a network of connecting links.

Abstract: A compressed air engine having a throttle with compressed air being supplied to the throttle. The engine includes at least two cylinders each having a reciprocating piston therein. Air is supplied from the throttle to the cylinders to drive the pistons within the cylinders. A crankshaft is coupled to the pistons and is rotatably driven in response to the reciprocating motion of the pistons. Each cylinder includes an inlet valve for allowing compressed air into the cylinder during a power stroke and preventing compressed air from entering the cylinder during an exhaust stroke, and includes an exhaust valve connecting the cylinder to atmosphere during the exhaust stroke and closing the connection to atmosphere during the power stroke. The inlet and exhaust valves are auger type valves with the inlet auger valves remaining open for approximately 180 degrees of crankshaft rotation and the exhaust auger valves remaining open for approximately the remaining 180 degrees of crankshaft rotation.

Abstract: A heat engine which the steady burning of liquid or gaseous fuel in a combustion chamber, external to the engine cylinders, is converted to mechanical work by means of expansion of the combustion gases in the engine cylinders. A pair of series inlet poppet valves is provided per engine cylinder so phased to provide a short interval period of gas admission to each cylinder for making the expansion ratio substantially equal to the compression ratio for maximum efficiency. The poppet valves, whose angular interval when they are both open are varied by an amount inversely proportional to the combustor pressure. The gas pressure forces acting on the poppet valves are counterbalanced to permit their actuation by conventional cams and valve gear without excessive cam loads and wear.

Abstract: A compressed air-operated motor driven from a rechargeable compressed air supply tank. The motor has sets of symmetrically opposing cylinders having spring-biased air admission valves and containing drive pistons connected to a crankshaft. The supply tank is connected to the admission valves through respective pilot valves of a pair controlled by relay poppet valves alternately opened by a rotating cam driven by the crankshaft. The pilot valves control the delivery of compressed air alternately to two cylinder groups comprising alternately oppositely located cylinders, so that their pistons act to drive the crankshaft in a common direction by alternate power pulsations.