Abstract: A vane assembly for use in a rotary vane actuator, the vane assembly comprising: a rotatable vane having a first side and a second side; a vane axle connected to the rotatable vane for converting pressure exerted on the rotatable vane into rotational motion; a vane seal on the first side of the rotatable vane, the vane seal being for sealing the rotatable vane; and a side-plate on the first side of the rotatable vane, the side-plate clamping the vane seal in position; wherein the side-plate comprises: an outer part providing an outer surface of the side-plate, the outer part defining an internal volume; and an inner part filling or substantially filling the internal volume defined by the outer part, the inner part being distinct from the outer part.

Abstract: A working oil chamber sealing system of a rotary vane steering gear actuator having a top end face of a respective segment of a housing that holds a segment top face horizontal seal. The segment top face horizontal seal having a sealing face which touches a rear face of a top cover. The top cover rear face holds an upper ring seal, a sealing face of which touches an outer circumferential edge of an upper end face of a rotor and also touches a sealing face inner edge of the segment top face horizontal seal and a sealing face inner edge of an upper horizontal vane seal of a rotor vane, respectively.

Abstract: A sealing system for use in a rotary vane actuator having a stator and a rotor coupled to the stator. The rotor or the stator has a vane. The rotor or the stator has a groove within which the seal is positioned. The stator, the rotor and the seal coact to define a chamber. The vane being movable thereby altering a volume of the chamber, with the seal being continuous.

Abstract: A hydraulic cylinder device includes a cylinder, an axle and two blade units. The cylinder includes a chamber with a cross-sectional shape like a circle overlapping another circle. The axle is inserted through the cylinder. The axle includes two opposite grooves defined therein. Each of blade units includes a blade, a primary roller and a secondary roller. The blade is movably disposed in a related one of the grooves and made with a groove defined in a side close to an internal side of the cylinder. The secondary roller is disposed in the groove. The primary roller is disposed in the groove so that the primary roller is in contact with the secondary roller on one hand and in contact with the cylinder on the other hand.

Abstract: Swivel motors have a large number of tightness problems on the inside, in particular in a broad operating temperature range. Therefore, to improve the tightness over a temperature range of ?40° C. to +130° C., a sealing device (20) is provided with an inner soft sealing element (20) and a plurality of outer rigid sealing elements (21, 22, 23, 24). The soft sealing element (20) and the rigid sealing elements (21, 22, 23, 24) are undetachably connected to one another. The circumferential sealing surfaces of the rigid sealing elements (21, 22, 23, 24), in the unloaded state, close flush with the sealing surface of the soft sealing element (20). The rigid sealing elements (21, 22, 23, 24) are spaced apart from one another by at least one radial compensating groove (25) and at least one axis-parallel compensating groove (26).

Abstract: A valve actuation assembly includes a housing and a vane connected to a shaft. The vane is at least partially disposed within the housing. The valve actuation assembly further includes a valve assembly connected to the housing and a feedback device connected to at least one of the vane and the shaft. The feedback device is configured to apply a feedback force to the valve assembly.

Abstract: The invention concerns a rotary piston adjuster for adjusting the angular position of the camshaft of an internal combustion engine, said adjuster comprising an outer rotor having at least one hydraulic chamber, and an inner rotor comprising at least one pivoting vane that can pivot hydraulically in the hydraulic chamber between a retard stop position and an advance stop position. A locking device suitable for detachably connecting the outer and inner rotors to each other and at least one compression spring acting in opposition to the frictional torque of the camshaft are arranged between the two rotors. A liberal design of the compression spring and a low-wear operation with this spring are enabled by the fact that the compression spring (27, 27′) is arranged in an attachment (4) that is connected to the rotary piston adjuster, and the components of the attachment have a wear-resistant configuration and support the compression spring (27, 27′) at least pointwise over its entire length.

Abstract: A variable valve timing device includes a rotation transmitting member rotated integrally with a rotation shaft of an engine, a rotor member disposed in the rotation transmitting member to be rotated relative to the rotation transmitting member and rotated integrally with an intake and exhaust valves controlling member, a fluid chamber defined between the rotor member and the rotation transmitting member, a vane radially equipped to one of the rotor member and the rotation transmitting member, and a covering member fixed to the rotation transmitting member for covering the fluid chamber. An axial edge surface of the biasing member discontinuously comes in contact with at least one of the rotor member and the covering member.

Abstract: Disclosed herein is a rotary vane actuator device with sealing assembly. The device includes a housing and a sealing assembly. The housing has a center opening defining a chamber. The housing includes opposing end plates for surrounding a stator. The stator having an aligned center opening and a rotor within the chamber. Within the chamber there are two openings, one serving as an inlet, the other serving as an outlet for rotational fluid. The rotor includes a vane assembly fixedly connected thereto. When the fluid enters the chamber, the fluid contacts the vane and moves the rotationally in the same direction. Each of the stator and the vane include seal packs. The end plates include sealing members which contact the stator and vane seal packs whether in the static or dynamic condition of the rotor. The combination of the seal packs and the end plate seal form the sealing assembly.

Abstract: Disclosed is a pneumatic actuator which includes a housing comprised of two halves and having at least two passages defined therethrough, including a “loop” groove defined in an inner peripheral wall of the housing into which a seal member is inserted. A rotary piston is rotatably received in the housing. The piston has a top and a bottom with an intermediate wall connected there between, and an actuating shaft extending through the housing, which is rotated by movement of the rotary piston. The seal member extends into the housing and is in contact with the top and bottom of the rotary piston all the times. The rotary piston moves free of contact with the interior surface of the housing and this one seal member provides a seal for the joint created between the halves of the housing, the chambers of the housing as well as the actuating shaft. Movement of the piston is effected by air pressure and return motion of the piston can be air driven or spring assisted.

Abstract: For a pivot motor with frame-like sealing elements which are situated in grooves of its vanes, the invention proposes a design in which the frame has an encircling channel which faces its interior and in which an inner sealing insert engages by means of its periphery.

Abstract: Disclosed is a pneumatic actuator which includes a housing comprised of two halves and having at least two passages defined there through, including a “loop” groove defined in an inner peripheral wall of the housing into which a seal member is inserted. A rotary piston is rotatably received in the housing. The piston has a top and a bottom with an intermediate wall connected there between, and an actuating shaft extending through the housing, which is rotated by movement of the rotary piston. The seal member extends into the housing and is in contact with the top and bottom of the rotary piston all the times. The rotary piston moves free of contact with the interior surface of the housing and this one seal member provides a seal for the joint created between the halves of the housing, the chambers of the housing as well as the actuating shaft. Movement of the piston is effected by air pressure and return motion of the piston can be air driven or spring assisted.

Abstract: The vane actuator according to the present invention is capable of operating effectively at a working pressure greater than 100 psig. The vane actuator comprises a vane shaft rotatably extending through a casing and a vane disposed within the casing defining a first pressure chamber and a second pressure chamber therein. The casing includes stiffening members for resisting deflection of and maintaining an internal seal within the casing when exposed to a pressure of 150 psig. The stiffening member may be located in the range of about 10° and 20° on either side of a casing centerline to minimize deflection of the casing when exposed to a pressure force.

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: A valve actuator with an arcuate piston disposed within a housing including a side wall having a partition and two end plates whereby when joined, the housing forms a first and a second compartment. An arcuate piston travels between the compartments via an opening in the partition in an oscillating manner. A removable piston assembly enables removing the arcuate piston, output shaft and lever arms supporting the piston in order to remove the output shaft or to engage a spiral spring connecting the output shaft with the housing. The spiral spring may be pretensioned by winding before inserting the piston assembly into the housing. Fluid pressure applied to either compartment urges movement of the arcuate piston into the opposite compartment.