Abstract: A fluid distributor apparatus includes a body having distribution ports (35, 37, 39, 62, 63); a spool adapted for controlling said distribution ports and mounted sliding in a first sliding seat obtained in said body and communicating with said distribution ports; a copying-member mounted sliding and sealed in a second seat obtained in said spool; and supply means for a controlled supply of said fluid to said second seat, so that said copying-member slides in a controlled way. Said supply means include also chamber means containing said fluid and communicating with said second seat, and pushing means of said fluid mounted sliding and sealed in said chamber means.

Abstract: A control system and method for controlling a flight control member employs a hydraulic control valve which is responsive to input from the pilot in a manner to start and stop a hydraulic motor which in turn starts and stops movement of the control member so that the control member assumes the desired flight control position.

Abstract: A fluidic power-assisted setting device has a setting motor having an output torque; a threaded spindle supported for rotation; a spindle nut threadedly mounted on the spindle for linear displacement; a setting member attached to the spindle nut for linear travel therewith; a gearing for transmitting the output torque of the setting motor to the spindle; a signalling device coupled to the gearing for generating an output signal when the linear force derived from the output torque of the setting motor is insufficient to overcome an external force opposing linear displacement of the setting member; and a fluidic power device including a hydraulic motor connected to the setting member for applying thereto a linear force to overcome the external force; and a hydraulic control valve hydraulically connecting the hydraulic motor with pressurized hydraulic fluid as a function of the output signal of the signalling device for causing the hydraulic motor to generate a force applied to the setting member for overcoming

Abstract: A servomechnism made up of a relatively small number of components has a pintle that is moved back and forth by a hydraulic actuator, an input member disposed opposite to the pintle and capable of reciprocating parallel with the pintle, a spool capable of reciprocating parallel to both the input member and the pintle, a pair of idle gears pivoted to the spool, and a hydraulic circuit. The input member has a rack opposite to a rack formed on the pintle. The spool is mounted between these racks. The idle gears are in mesh with the racks. When the input member is moved to shift the spool out of its neutral position, the actuator is unlocked to return the spool to its neutral position.

Abstract: A power boost mechanism for converting pilot linear throttle input commands to rotary motion and providing amplification of output torque to an engine fuel control and having an output shaft adapted for connection to an engine power lever assembly. An input member is movable in response to a throttle input command and power boost structure responsive to movement of the input member causes rotation of the output shaft. The mechanism further includes feedback structure associated with the output shaft and responsive to movement thereof for returning said power boost structure to a null position independently of said input member, structure automatically enabling direct operation of the output shaft by said input member when the power boost structure is inoperative, and structure responsive to a malfunction in the engine fuel control causing limited rotation of the output shaft without movement of said input member.

Abstract: A power boost mechanism for converting pilot linear throttle input commands to rotary motion and providing amplification of output torque to an engine fuel control and having an output shaft adapted for connection to an engine power lever assembly. An input member is movable in response to a throttle input command and power boost structure responsive to movement of the input member causes rotation of the output shaft. The mechanism further includes feedback structure associated with the output shaft and responsive to movement thereof for returning said power boost structure to a null position independently of said input member, structure automatically enabling direct operation of the output shaft by said input member when the power boost structure is inoperative, and structure responsive to a malfunction in the engine fuel control causing limited rotation of the output shaft without movement of said input member.

Abstract: The invention relates to a hydrostatic control unit of the metering type utilized for some automotive type power steering systems. The control unit has a valving section with inlet and outlet ports connectable to a pump and a tank and two working ports connectable to opposite sides of a bidirectional servomotor which is connectable to wheel steering linkage. A metering motor controlled by the valving section supplies and exhausts metered fluid to and from the servomotor through the two working ports of the valving section. The valving section has a single movable slide element cooperable with a stationary housing member. A gearing unit which may be of the planetary type is provided having two inputs and one output with the two inputs being connectable to the vehicle steering wheel and the metering motor input shaft and the output being connectable to the slide valve element.

Abstract: A control system for a motor through which a specific rotary output is obtained from a given input signal by controlling an operational supply of fluidic energy. The control system includes a direct mechanical servo which receives the input signal to control a rotary plate directional valve through which the operational supply of fluid is communicated to the motor. The direct mechanical servo includes a compound epicyclic gear train and an intermittent motion gear mechanism which compares the input position with the output position of the motor to establish a feedback signal which repositions the rotary valve plate directional valve to a null position when the rotary output equals that requested by the input signal. The control system further includes a regulator assembly which receives a variable reference signal to control the fluid pressure of the supply fluid. The variable reference signal which represents the work performed by the motor also passes through a relief valve.

Abstract: A power steering valve system includes an input shaft and an output shaft which are aligned on a common axis, and also includes a control valve mechanism which is located offset from the axis in order to reduce the overall length of the valve system. The control valve mechanism includes a spool valve, a displacement of which from its neutral position controls the flow of a hydraulic oil from an oil pump to or from a power cylinder to assist in directing the steerable road wheels in a given direction. The input and output shafts are operatively associated with a motion translating mechanism which translates the magnitude of a relative torsion between the two shafts into a linear displacement. The motion translating mechanism is operatively associated with the spool valve to displace it from the neutral position in accordance with the magnitude of relative torsion between the two shafts.

Abstract: A hydro mechanical condition-responsive servo control valve for controlling a variable condition, such as position or rate of change of position, of a remote element, comprises a rotary fluid valve controlled by a differential gear train arranged to register differential movement between two input shafts, one of which is connected for movement according to a desired input condition and the other of which is alternatively connected either to register the actual element condition or a reference [datum] condition; the rotary valve including mating stationary and rotary valve plates each incorporating fluid flow ports cooperatively arranged on the mating plate surfaces thereby to control fluid flow from a fluid inlet to a fluid outlet in accordance with the relative position or movement of said two input shafts.

Abstract: Disclosed is a hydraulic servomechanism wherein the motion of a driven element is synchronized with the motion of a command element by detecting any phase difference between the movement of the driven element and that of the command element, controlling the flow rate of a hydraulic fluid being fed to the driven element with a directional and flow control valve in proportion to the detected amount of phase difference and also controlling the flow rate of the hydraulic fluid being fed to the hydraulic servomechanism with a pressure compensation valve in proportion to the variation in the load exerted on the driven element.

Abstract: Apparatus is presented for the precision control of an output signal in accordance with an input signal. The output signal is the output of a hydraulic motor, the output of which is compared to an electrical input signal in a geared differential comparator, the output of the comparator operating a distributor supplying the hydraulic motor.

Abstract: A differential mechanism having two inputs independent of each other and an output is provided in an interconnecting mechanism for transmitting the rotaional angle of a handle to steered wheels. Also a transducing mechanism as a control system is provided which receives the speed of the automobile and the rotational angle of the handle as detected quantities and can control the deflection of the steered wheels after the operation by a driver so as to return the deflection to zero with a control speed dependent on the speed of the automobile. The steered wheels are operated by the output of the differential mechanism which receives the rotational angle of the handle and the output of the control system as its differential inputs.