A stepper motor driven actuator system is provided. The system includes a stepper motor, a cam, and a gearbox system. The gearbox system operatively connects the stepper motor to the cam. The cam rotates in response to stepping of the stepper motor. The system also includes a valve having a control piston located therein. The control piston is configured to translate in response to rotation of the cam. The system further includes a rotary actuator. The rotary actuator is fluidly connected to the valve, and the rotary actuator is configured to rotate the cam in response to translation of the control piston.

The present disclosure relates to the field of fluid process systems and discloses a manifold system for fluid delivery. The system comprises a first set of Solenoid Operated Valves (SOVs), a second set of SOVs, a plurality of isolating valves, at least one first shuttle valve, and at least one redundant shuttle valve. Each set of SOVs includes at least two SOVs arranged in parallel. The SOVs together form a series-parallel redundancy. Each isolating valve is coupled to an SOV and facilitates hot swapping of that SOV. The redundant shuttle valves provide redundancy to the first shuttle valve and facilitate the flow of a fluid from each of the first set of SOVs to each of the second set of SOVs, thereby promoting system safety and availability.

A reciprocating linear/rotational motion conversion device has a main shaft, a linear motion guiding mechanism, a sector gear and a rack frame. The sector gear is fixedly connected with the main shaft. A rack pair is arranged on the inner wall of the rack frame. The rack pair comprises a first gear rack and a second gear rack separately arranged on both sides of the sector gear. The reciprocating linear/rotational motion conversion device further includes a reversing mechanism fixedly connected with the main shaft. A cylinder device contains the reciprocating linear/rotational motion conversion device, connecting rods, pistons and cylinder bodies. The cylinder body is sleeved on the piston, and a cylinder head is arranged on one end of the cylinder body.

Disclosed is an electro-hydraulic actuator for providing mechanical actuation. The electro-hydraulic actuator comprises a housing having a first chamber and a second chamber and a gear pump arranged within the first chamber. The gear pump is configured to pump fluid from the first chamber into the second chamber. Furthermore, the electro-hydraulic actuator comprises a piston assembly comprising a piston-head slidably arranged within the second chamber, a piston-rod coupled to the piston-head, and a rack configured as piston-rod. The rack comprises a plurality of teeth and the rack is configured to move linearly corresponding to the linear movement of the piston-rod. Moreover, the electro-hydraulic actuator comprises a shaft arranged within the first chamber and orthogonally to the piston-rod and a pinion mounted on the shaft. The pinion is configured to rotate upon linear movement of the rack to cause rotation of the shaft, for providing the mechanical actuation.

A support apparatus is equipped with a support foot of hydraulic type that comprises: a cylinder equipped with a cavity axially shaped that has a longitudinal axis, a piston slidably received in a sealed manner in the cavity so as to divide said cavity into a first chamber and a second chamber, a stem provided with a first end fixedly connected to the piston and a second end that protrudes from the cylinder, a base fixed to the second end of the stem, and an actuation group of the support foot configured to selectively send a pressurised work fluid to the first chamber or to the second chamber so as to change the relative position of the base with respect to the cylinder. Where said support apparatus comprises: a position sensor configured to monitor the value of a parameter indicative of the position of the base with respect to a reference element fixedly connected to the cylinder, and an electronic control unit, electrically connected to said position sensor, which is configured to transmit the value of the indicative parameter monitored by the position sensor to a remote device and to control the activation of the actuation group of the support foot as a function of an activation signal and the value of the indicative parameter.

A rotary drive for actuating a valve element of a valve fitting, having a housing, which has a drive device and a pivot-mounted driven shaft which can be driven by the drive device and which can be coupled to the valve element, and a position detection device for detecting a position of the driven shaft, wherein the position detection device has a magnet module attached to the driven shaft in a torque-proof manner and a sensor module which is fitted onto or into the housing and is designed to detect a magnetic field measurement value according to the magnetic field generated by the magnet module. The the magnet module and/or the sensor module is attached such that it can be removed from the rotary drive, and the rotary drive includes a control device, which is adapted to determine if the magnet module or the sensor module is removed from the rotary drive.

A hydraulic disc coupling (1) for a system distributing torque between the left and right wheels and/or the front and rear axles of a vehicle is provided. A coupling piston (6) is configured to be mechanically locked by an integrated locking arrangement (23), when the coupling piston (6) is actuated to act on the disc package (8), such that the coupling remains engaged whereby the input (2) is connected to the output (7) of the coupling (1) without hydraulic pressure acting on the coupling piston (6). Unlocking of the integrated locking arrangement (23) is provided by again actuating the coupling piston (6).

A reciprocating linear/rotational motion conversion device has a main shaft, a linear motion guiding mechanism, a sector gear and a rack frame. The sector gear is fixedly connected with the main shaft. A rack pair is arranged on the inner wall of the rack frame. The rack pair comprises a first gear rack and a second gear rack separately arranged on both sides of the sector gear. The reciprocating linear/rotational motion conversion device further includes a reversing mechanism fixedly connected with the main shaft. A cylinder device contains the reciprocating linear/rotational motion conversion device, connecting rods, pistons and cylinder bodies. The cylinder body is sleeved on the piston, and a cylinder head is arranged on one end of the cylinder body.

A pneumatic stepper motor includes a housing, said housing accommodating at least part of: a rack or geared axle comprising a plurality of gear elements; and two pistons, each comprising at least two teeth, said pistons being arranged to cooperate with said rack or geared axle. The racks may either be straight or curved. The pistons are preferably double-acting pistons. A device includes at least one, and preferably a plurality of, such pneumatic stepper motor(s). The device may in particular be an MRI-compatible robotic system, more in particular for example an MRI-guided breast biopsy device.

A fluid-actuated rotary actuator includes a housing having a tubular body extending in an axial direction, in which is provided a drive piston assembly for driving a rotatably mounted output shaft, which extends perpendicular to the axial direction through the tubular body and the axial end of which is routed out of the tubular body at an upper wall section of the tubular body, further including a magnet assembly associated with the axial end of the output shaft and receiving a rotary movement of the output shaft, and further including a position feedback device configured to detect the magnetic field generated by the magnet assembly and to provide, in accordance with the detected magnetic field, a position signal corresponding to a position of the output shaft, wherein the position feedback device is located in a receptacle chamber formed in the upper wall section of the tubular body.