Abstract: A motor-driven centrifugal pump for circulating a coolant in a primary circuit of a nuclear reactor comprises a sealed motor unit, a hydraulic part and a shaft which is immersed in the coolant, turned by the sealed motor unit and pumping the coolant by an impeller of the hydraulic part secured to the shaft. The motor unit comprises a dry stator and an immersed rotor, mounted securely on the shaft. The motor-driven pump also comprises an immersed flywheel mounted securely on the shaft between the rotor of the motor unit and the impeller of the hydraulic part, allowing a minimum slowing-down time after the electrical power supply is cut; and an immersed anti-backspin device, configured to mechanically block the rotation of the shaft in a predetermined direction.

Abstract: A hydraulic pump or motor includes a body having a chamber and a rotor rotatably mounted within the chamber. The chamber and rotor are shaped to define one or more rise regions, fall regions, major dwell regions and minor dwell regions between walls of the chamber and the rotor. The rotor has a plurality of slots and vanes located in each slot. Each vane is movable between a retracted position and an extended position. In the retracted position, the vanes are unable to work the hydraulic fluid introduced into the chamber whereas they are able to work the hydraulic fluid introduced into the chamber in the extended position. A vane retaining member that is selectively actuable enables the vanes to be retained in the retracted position.

Abstract: An eccentric gearing type clutch includes a housing connected to, and for rotation with, a drive shaft; at least one set of rotors, each set of rotors having two parallelly arranged rotors concentric with the housing and being connected to, and for rotation with, a driven shaft; at least one set of cylinder rings cooperating with respective rotors, each set of cylinder rings having two cylinder rings arranged in parallel and located between the housing and respective rotors, and being capable of upward and downward displacement inside the housing, the two cylinder rings being separated by a separator plate; a vane movably arranged in a slot in each rotor; and a joint control mechanism for controlling upward and downward displacement of the two cylinder rings, wherein space inside the housing is filled with an operation oil and sealed. Reduced frictional wear provides improved clutch performance, enhanced lifespan and braking accuracy.

Abstract: A hydrostatic system for step less rotary movement transmission having two hydrostatic motors with radial pistons connected in a push-pull configuration, an oil distribution system and a system for elimination of air and other volatile substances from the working spaces. The input of the gear box is connected to the engine and the output is connected to the external load. In this push-pull configuration of both hydrostatic motors, the stators of both hydrostatic motors are the active part of the gear box, while rotors of both hydrostatic motors are the passive part of the system. Additionally, the hydrostatic system has both hydrostatic motors having the same rotary speed but moving in the opposite direction. While the first stator is connected to the engine, the common driven shaft of the both hydrostatic motors is connected to the external load on the output of the system.

Abstract: A device for controlling the activation of an apparatus by a motor, intended to be inserted between, the operation output of the motor and the operation input of the apparatus whose activation is to be controlled. The device includes: —a blade pump having a rotor, at least one blade carried by this rotor and a rotary body forming a pumping chamber missing an outlet, and one of the component parts, among the rotor and the rotary body, being connected to the operation output of the motor, whilst the other of these component parts is connected to the operation input of the apparatus to be controlled; —and a supply intended to supply liquid to the pumping chamber.

Abstract: A device for controlling the activation of an apparatus by a motor, intended to be inserted between, the operation output of the motor and the operation input of the apparatus whose activation is to be controlled. The device includes: —a blade pump having a rotor, at least one blade carried by this rotor and a rotary body forming a pumping chamber missing an outlet, and one of the component parts, among the rotor and the rotary body, being connected to the operation output of the motor, whilst the other of these component parts is connected to the operation input of the apparatus to be controlled; —and a supply intended to supply liquid to the pumping chamber.

Abstract: A device for coupling an input shaft and an output shaft is provided. The device includes a carrier coupled to the input shaft, a pressure chamber, and a rotary pump coupled to the carrier in the output shaft. The rotary pump is adapted to increase pressure in the pressure chamber upon relative rotational movement of the carrier and the output shaft and to resist relative rotational movement of the carrier in the output shaft upon the presence of sufficient pressure in the pressure chamber.

Abstract: A hydraulically operated rotary clutch includes a housing, a triangular rotor, an input gear, an eccentric shaft, a main shaft, a shifting piston, and a mechanism to operate the shifting piston. The rotor orbits in an inner elliptical opening of the housing and forms fluid chambers which are filled with a hydraulic fluid. The hydraulic fluid circulates through fluid passages which extend between all fluid chambers when the shifting piston is positioned to allow such fluid circulation, thereby resulting in a disengagement of a drive and driven member. When the shifting piston is driven to restrict the fluid circulation, the driving force is gradually applied to the driven member. A full-scale power flow is reached when the shifting piston is positioned to completely cut off the fluid circulation between the fluid chambers and when the force exerted by the drive member is transmitted through the fluid onto the driven member.