A self-contained pressure compensation system and a control method thereof are provided, wherein the self-contained pressure compensation system comprises an oil supply device, a pressure compensation device, a power unit associated with the pressure compensation device, and a switch control device, the pressure compensation device supplies oil to the power unit and detects a change in a chamber pressure of itself in real time, the switch control device triggers the oil supply device to supply oil to the pressure compensation device if the chamber pressure is less than a predetermined first threshold and triggers the oil supply device to stop supplying oil to the pressure compensation device if the chamber pressure is greater than a predetermined second threshold. The invention can detect a chamber pressure of the pressure compensation device in real-time and can achieve automatic oil refilling, and can provide pressure compensation for the power unit effectively.

An apparatus for use with a robot may couple to or form part of an appendage, for example a wrist. The apparatus can include a base, a first platform, a second platform, a first set of linear actuators that moveably couple the first platform to the base and a second set of linear actuators that moveably couple the second platform to the first platform. The apparatus can take the form of dual prismatic platforms. A controller can provide control signals to operate the linear actuators to cause the first platform to translate and rotate with respect to the base and to cause the second platform to translate and rotate with respect to the first platform. Connectors can couple the base to an appendage and couple an end effector to the second platform.

The present invention relates to a pressure control valve (30) for open-loop or closed-loop control of a pressure of a compressed fluid in a pilot pressure chamber (12), comprising a valve housing (50) with at least one inlet (41) which can be fluidically connected to the pilot pressure chamber (12), and at least one outlet (43); a wall section (51) which is permanently arranged in the pressure control valve (30) and which wall section has a passage channel (60) through which the compressed fluid can flow, and forms a first valve seat (58); a tappet (52) which is mounted in the valve housing (50) so as to be movable along a longitudinal axis (L) by means of an actuation device (49) that can be energized; a first sealing element (54) which forms a second valve seat (66), is mounted in the valve housing (50) so as to be movable along the longitudinal axis (L) and is biased by means of a first spring (56) against the actuation direction (B) of the actuation device (53) into a closure position in which the first sealing element (54) bears against the first valve seat (58) and can be moved by the compressed fluid in the actuation direction (B); and a second sealing element (64) which is attached to the tappet (52), the second valve seat (66) being arranged axially offset to the first valve seat (58) with respect to the longitudinal axis (L), and a second spring (68), which biases the second sealing element (64) into the first position.

A gas supply regulation assembly includes at least one inlet capable of being in fluid communication with at least one gas bottle and an outlet capable of being in fluid communication with a gas-consuming appliance. The gas supply regulation assembly further includes a gas pressure detection device for detecting gas pressure in a chamber communicating with the outlet.

A valve system having a vacuum valve with a valve seat having a valve opening defining an opening axis and a first sealing surface around the valve opening, a valve closure having a second sealing surface and a drive unit coupled to the valve closure. A control and regulating unit preforming a pre-regulating step and a regulating step for the valve closure in a regulating cycle, the pre-regulating step moves the valve closure to a defined position and the regulating step the closure position is varied based on a determined control variable and a target value. The regulating and control unit updates at least during a part of the regulating cycle and a regulating profile is derived, the regulating profile is compared with a reference regulating profile and a regulating deviation is derived, an adapted pre-regulating position is provided as the actual pre-regulating position for the regulating cycle.

A fuel pump system for an aerial refueling system including: a variable displacement motor operable to be driven by a hydraulic fluid pressure; a fuel pump operable to be driven by the variable displacement motor; and a drive system controller (DSC) connected to the variable displacement motor, wherein the DSC is operable to direct an operation of the fuel pump in modes comprising: a flow control mode operable to maintain an output fuel flow rate from the fuel pump to a predetermined maximum inlet pressure at a reception coupling for a receiver aircraft; a fuel pressure control mode operable to regulate the output fuel flow rate to not exceed the predetermined maximum inlet pressure; and a priority mode operable to reduce the output fuel flow rate in response to a decrease in the hydraulic pressure. Also a method of refueling a receiver aircraft.

An operation facility for an unmanned aerial vehicle with rotary wing of the present invention includes: a passage space that extends in the up-down direction and is for the ascent and descent of the unmanned aerial vehicle; and an air pressure control system that controls the air pressure in the passage space. The air pressure control system performs control such that the air pressure above the unmanned aerial vehicle is lower than the air pressure below the unmanned aerial vehicle.

A processing liquid supply system includes a tank that stores a processing liquid supplied from a processing liquid supply, a circulation passage that is connected to the tank, a plurality of supply passages that is connected to the circulation passage and supplies the processing liquid to each of a plurality of liquid processing units that perform a liquid processing on a substrate, a first pump filter set that is a combination of a first pump and a plurality of first filters provided downstream of the first pump, and a second pump filter set that is a combination of a second pump and a plurality of second filters provided downstream of the second pump. The first pump filter set and the second pump filter set are arranged in series in the circulation passage such that the first pump filter set is located upstream of the second pump filter set.

The invention relates to an apparatus for analyzing reaction systems with a liquid phase (13) and a gas phase (15), the apparatus (1) comprising at least two tank reactors (3), a common feed line (5), a common drain line (25) for the liquid phase and a common drain line (21) for the gas phase, each tank reactor (3) being connected to the common feed line (5) by a supply line (7), to the common drain line (25) for the liquid phase by a liquid withdrawal line (27) and to the common drain line (21) for the gas phase by a gas withdrawal line (23), wherein the pressure in each tank reactor (3) is controlled by one of: (a) a pressure control (31) in the common feed line (5); (b) a pressure line (29) which is connected to the gas space of each tank reactor (3); (c) a pressure control (31) in the common drain line (21) for the gas phase and a flow restrictor (33) in the common drain line (25) for the liquid phase or a pressure control (31) in the common drain line (25) for the liquid phase and a flow restrictor (33) in the common drain line (21) for the gas phase; or (d) a pressure line (29) which enters into the common drain line (25) for the liquid phase or into the common drain line (21) for the gas phase.

The invention further relates to a process for analyzing reaction systems in such an apparatus.

A proportioning valve for a reverse osmosis system that controls the production of product water by the differential pressure across the purification membrane. By sensing increasing tank pressure to actuate the proportioning valve, the flow of waste water is restricted. Placement of seals within the cavity of the valve, as well as placement of waste water inlet and outlet ports, protects tension components that provide reverse tank pressure from waste water exposure. A needle valve assembly responsive to an actuating assembly that senses tank pressure removes the need for an inlet tank water port while restricting water flow.