A hydraulic pump is described, comprising at least one inlet duct for a fluid, at least one outlet duct for the fluid and at least one pumping unit interposed between the inlet and outlet ducts. At least one multifunction valve is interposed between the inlet duct, upstream of the pumping unit, and the outlet duct, downstream of the pumping unit, which valve is configured to divert the flow of fluid from the inlet duct to the outlet duct without the fluid flowing into the pumping unit. The multifunction valve comprises a valve body that defines an inner bypass channel in which a shutter element is axially movable, an actuator member operatively associated with the shutter element and configured to move it from a closing position to an opening position of the bypass channel, and an elastic contrast element operatively associated with the shutter element and configured to keep it in the first closing position of the bypass channel when such shutter element is not actuated by the actuator member. The actuator member consists of a bias spring manufactured with a shape memory alloy, configured to move the shutter element from the first closing position to the second opening position of the bypass channel when a predefined temperature value is reached.

A pneumatic valve, including a valve housing with an air chamber with one or more air ports. A respective air port of at least one of the air ports can be opened and closed by a movable valve flap which is mechanically coupled to a shape memory alloy. The SMA element deforms as a result of supplying electrical heating current and effects a predefined movement of the valve flap for opening or closing the respective air port. The deformation of the SMA element is reversed when the supply of the electrical heating current ends. The valve flap has a leaf spring. The leaf spring is held rotationally fixedly relative to the valve housing. The leaf spring interacts with the SMA element such that a stroke of the SMA element caused by the deformation is converted into a stroke of the valve flap by elastic bending of the leaf spring.

A high temperature protective valve and the use thereof in a shower head, wherein the high temperature protective valve includes a body, the body having a complete one-way waterway, and also a thermo-sensitive assembly and a pivot valve assembly. The thermo-sensitive assembly is fixed inside the body and has a memory alloy body which can be immersed in the waterway and extend and retract along the direction of the flow. The pivot valve assembly is also fixed inside the body downstream waterway of the thermo-sensitive assembly. The pivot valve assembly has a pivot valve plug which is controllable by the thermo-sensitive assembly so as to cut off the waterway. The high temperature protective valve of such a structure has a fast response and can achieve good protective effects at a high temperature.

A thermal valve unit is provided for use with an oil filled screw compressor. The thermal valve unit can be affixed to an exterior pipe segment and can include a thermally responsive element in thermal communication with compressed air traversing through the pipe segment. The valve unit can include a movable valve member actuated by the thermally responsive element that opens and closes oil passages to selectively route oil either to a heat exchanger prior to being delivered to the oil filled compressor, or directly to the compressor without passing through the heat exchanger.

A can-type heat exchanger may include a housing having a space therein, integrally formed with a mounting portion, and a first inlet and a first outlet; a partition wall integrally formed to the housing, separating the space and the inside of the mounting portion, and forming a bypass passageway inside of the housing; a heat radiating unit inserted into the space, provided with connecting lines alternately formed by stacking a plurality of plates; a cover cap mounted at opened one surface of the housing, and a second inlet and a second outlet for communicating a second connecting line of the connecting lines; and a valve unit mounted at the first inlet formed in the mounting portion and penetrating the partition wall in the mounting portion, selectively opening and closing the space or the bypass passageway separated by the partition wall using linear displacement.

A drag torque reduction device for an automatic transmission includes a hydraulic controller with a diversion for excess cooling oil into an oil sump that is positioned upstream of a radiator relative to a flow of fluid to the radiator. The diversion includes a temperature-dependent, switchable aperture and a switching valve. The temperature-dependent, switchable aperture is configured to close above a temperature threshold. The switching valve is configured to close above a threshold pressure.

A valve apparatus for controlling the flow of two sources of a first fluid while preventing mixing of the two fluid sources is disclosed along with a system incorporating the same. The valve apparatus has a first valve chamber with a first valve mechanism for controlling the flow of a first fluid, such as a heated coolant, from a first source. A second valve chamber with a second valve mechanism controls the flow of a first fluid, such as a cooled coolant, from a second source, the first and second valve chambers being fluidly isolated from each other. At least one thermal actuator arranged within a control chamber or control manifold controls operation of the first and second valve mechanisms, the thermal actuator having a first activation temperature for controlling the first valve mechanism and a second activation temperature for controlling the second valve mechanism. A control fluid passing through the control chamber, or control manifold, dictates the operational settings of the first and second valve mechanisms, respectively. The control fluid may comprise a fluid to be heated and/or cooled, such as a transmission fluid.

A circuit arrangement controls a system for a seat comfort function with at least one air cushion, at least one actuator with at least one adjusting element and at least one SMA element being movable between a first position and a second position. The circuit arrangement includes at least one driver unit with at least one driver to activate the actuator with the at least one SMA element; at least one temperature sensor; and a control unit to control the driver unit, the control unit being configured to generate a control signal to control the driver unit. The control signal is determined from a) at least one actual filling level parameter; b) a temperature signal from the temperature sensor; c) a system parameter; and d) at least one of a target filling level parameter and a target filling level change parameter. A related seat and method of controlling same are also disclosed.

The present invention relates to a spraying vessel and a valve assembly comprising the same, the spraying vessel comprising: a housing provided with an upper sealing cap for sealing an upper portion and a receiving space for receiving contents; a mount cup, mounted on the upper sealing cap, having a through hole formed in a central portion thereof; a stem housing provided with a mounting portion, mounted to the mount cup, having a hollow portion formed therein, and a communication flow path for making the hollow portion be in communication with the receiving space; a valve stem which is installed to pass through the through hole and slide in the hollow portion, and is provided with an orifice being configured to selectively communicate with the hollow portion by a sliding motion; and a flow path blocking valve formed to block an inlet of the communication flow path.

The invention relates to a valve device (100) for a gaseous medium, in particular hydrogen, comprising a valve housing (6) which comprises a closing element (14) that is arranged therein and can be moved in the longitudinal axis (18). The closing element (14) interacts with a seal seat (16) in order to release and close a through-opening (22). The valve housing (6) is equipped with at least one spring element (8) which is supported against the closing element (14) and the valve housing (6). Furthermore, the at least one spring element (8) is made of a bimetal.