Abstract: To provide an oscillating actuator which is capable of easily changing an oscillation start position of a shaft. An oscillating actuator includes an actuator main body 2 having a shaft 4 which is configured to oscillate about an axis L in a predetermined range of angle by means of a compressed air, and a fixing plate 3 for fixing the actuator main body 2 to a load device 30, wherein the actuator main body 2 and the fixing plate 3 are connected together by a connection mechanism 5 so as to be displaceable relative to each other in the rotation direction of the shaft 4 so that an oscillation start position A of the shaft 4 is changed by displacement of the actuator main body 2 and the fixing plate 3 relative to each other.

Abstract: A piston machine comprises a housing, in which at least one first piston is arranged which can be moved to and fro between two end positions in order to periodically increase and reduce the size of a working chamber adjoining a first end face of the at least one first piston, the at least one first piston having at least one guiding member, which is in engagement with a control curve which is formed on a curve member arranged in the housing, the curve member extending concentrically and circumferentially in the housing, all the way round an axis of revolution which is fixed relative to the housing, and being arranged radially to the outside of the piston in relation to the axis of revolution, a second piston being situated opposite the at least one first piston and performing opposing reciprocating movements relative to the first piston, the second piston having a second end face, which faces the first end face of the first piston, and the working chamber being situated between the end faces.

Abstract: A piston machine comprises a housing, in which at least one first piston is arranged which can be moved to and fro between two end positions in order to periodically increase and reduce the size of a working chamber adjoining a first end face of the at least one first piston, the at least one first piston having at least one guiding member, which is in engagement with a control curve which is formed on a curve member arranged in the housing, the curve member extending concentrically and circumferentially in the housing, all the way round an axis of revolution which is fixed relative to the housing, and being arranged radially to the outside of the piston in relation to the axis of revolution, a second piston being situated opposite the at least one first piston and performing opposing reciprocating movements relative to the first piston, the second piston having a second end face, which faces the first end face of the first piston, and the working chamber being situated between the end faces.

Abstract: A variable camshaft timing phaser for an internal combustion engine having at least one camshaft comprising a plurality of vanes in chambers defined by a housing and a spool valve. The vanes define an advance and retard chamber. At least one of the vanes is cam torque actuated (CTA) and at least one of the other vanes is oil pressure actuated (OPA). The spool valve is coupled to the advance and retard chamber defined by the CTA vane and the advance chamber defined by the OPA vane. When the phaser is in the advance position, fluid is routed from the retard chamber defined by the OPA vane to the retard chamber defined the CTA vane. When the phaser is in the retard position fluid is routed from the retard chamber defined by the CTA vane to the advance chamber defined by the CTA vane.

Abstract: There is provided a chuck having four radial jaw grooves, two pairs of opposed jaws movably provided in the grooves, a first rotary vane actuator for actuating one pair of the opposed jaws, and a second rotary actuator for actuating the other pair of the opposed jaws, an inlet for admitting fluid into chambers of the actuators, and an outlet for discharging fluid from the chambers. The first and second vane actuators are opearated by the fluid admitted from the one inlet such that the two pairs of opposed jaws are differentially actuated by said first and second rotary vane actuators. The first rotary vane actuator includes a first pressure chamber and the second rotary vane actuator includes a second pressure chamber, in which the first and second pressure chambers are in fluid communication via at least one fluid-conducting path.

Abstract: A telescoping robot arm with singularity-free three degrees of motion freedom spherical joints is disclosed. The telescoping section and spherical joints are hydraulically operated to achieve a high power-to-weight ratio and use conventional seals of the type normally used on hydraulic pistons. The spherical joints of the instant invention are comprised of a generally spherical cavity containing a tiltable member with integral a retractable arcuate vanes interdigitized with retractable arcuate vanes in a non-tiltable member. A plurality of cavities is formed within the spaces between the interdigitized arcuate vanes of the instant invention, with the volume of these intervane cavities being controlled with an equal plurality of hydraulic valves. A plurality of spherical joints of the present invention may be interconnected with double acting telescoping sections of the present invention to form a robotic arm assembly.

Abstract: The invention is an apparatus that allows a motor to move in any one of three linear directions, but it restrains rotary motion of the motor housing. In practice, the motor is used for driving a pump or some other rotary motion device. The device includes a lever arm fastened to the motor housing and a hydraulic cylinder pivotally connected to each end of the arm and to a support member. Each cylinder is divided into two chambers by a piston head, and hydraulic lines connect the chambers of one cylinder to the chambers of the other cylinder. When the pump (or other rotary motion device) tends to cause rotational movement of the motor housing, and lever arm, each cylinder responds to this rotational load by trying to displace fluid (oil) from one cylinder to the other. Since each cylinder tries to displace an equivalent volume of oil toward the other cylinder, through a common conduit, displacement of the oil is not possible.

Abstract: A piston for a fluid pressure chamber having an arcuate longitudinal axis. Such piston comprises an assemblage of two spherical bodies in side-by-side relationship and interconnected by a universal pivot. Each spherical body carries a circumferential piston ring receiving groove and piston rings are mounted in such grooves to provide a sliding and sealable engagement with the walls of the fluid pressure chamber as the piston moves along the curved longitudinal axis of such chamber.

Abstract: A gear-type machine whose housing accommodates two symmetrical idle gears which are in mesh with an internal toothing of an element embracing them inside the housing and with an external toothing of a central gear, whereas the spaces confined between the idle gears and the toothings accommodate webs to form herewith fluid tight chambers for a working fluid which thus imparts rotation of the idle gears. The internal toothing is stationary and carries the webs, while the idle gears are free to roll over the stationary toothing to impart rotation to the central gear which, in turn, may transmit the torque to a machine output member. In another, preferred embodiment, the central gear is stationary while the housing with its internal toothing is rotatable and constitutes the output.The inventive machine enables rotation of the output member through an angle smaller or greater than 360.degree..

Abstract: An oscillating piston engine capable of running on a working fluid such as steam or compressed air comprises a bank of cylinders mounted for rotation in unison to turn a shaft in an engine block, pistons mounted for oscillation in the cylinders and rotatable in unison relative to the cylinders to turn another shaft in the engine block, control means operable in response to rotation of the cylinders for supplying and exhausting working fluid to and from opposite ends of the cylinders in alternating timed relation to cause the pistons to oscillate in the cylinders and pistons, and gearing means connecting the piston shaft and the cylinder shaft to an output shaft for converting the oscillating motion of the pistons and cylinders into unidirectional rotation of the output shaft.

Abstract: An oscillating piston internal combustion engine comprises a bank of combustion chambers mounted on the front of an engine block for rotation in an annular path to rotate an output shaft protruding from the rear of the block. Gearing inside the block converts oscillating motion of the pistons and cylinders into unidirectional rotation of the output shaft.