The flow path switching valve described herein has a valve chamber with three openings and a valve piston disposed in the valve chamber. The valve piston has a flexible diaphragm which at its circumference co-operates sealingly with an inner circumferential wall of the valve chamber. The valve piston is movable between two end positions; in a first end position, it opens a flow path between a first opening and a second opening and blocks a third opening, and in the second end position, it blocks the first opening and opens a flow path between the second opening and the third opening. The wall of the valve chamber is shaped such that in the last phase of the diaphragm movement to the first end position, the sealing contact between the diaphragm and the inner wall is undone in at least part of the circumference.

There is provided herein, a valve for filling of at least one fluid cell of a pressure device, the valve comprising: a multiplicity of chambers; at least one elastic membrane having a varying physical property along at least one dimension thereof, the at least one elastic membrane configured to cover one or more of the multiplicity of chambers to cause varying pressure among the multiplicity of chambers; at least one membrane fluid inlet configured to provide fluid so as to apply pressure on one side of the at least one elastic membrane; at least one chamber fluid inlet configured to provide fluid to at least one of the multiplicity of chambers and apply pressure to the other side of the at least one elastic membrane; and at least one chamber fluid outlet configured to allow fluid to exit from at least one of the multiplicity of chambers to at least one fluid cell of a pressure device.

The device comprises a first fluid pump for supplying first fluid from a first fluid source to the fluid control valve, a second fluid pump for supplying a flow of a second fluid from a second fluid source to the fluid control valve, and a pressure container for containing pressurized second fluid, the fluid control valve comprising a first fluid channel, a separate second fluid channel, a valve member for closing the second fluid channel when no first fluid flows through the fluid control valve or opening the second fluid channel when no second fluid flows through the fluid control valve or when second fluid flows with a low pressure, and a spring for biasing the valve member for closing the fluid control channel.

A system for distributing a fluid in a vehicle, comprising: a plurality n of independent fluid ejection devices; a plurality n1 of distributors, each having an inlet, a first outlet and a second outlet and being configured to establish a fluid connection either between the inlet and the first outlet or between the inlet and the second outlet; the inlet of a first distributor being connected to a pump connected to a fluid reservoir; each independent ejection device being connected to an outlet of a distributor; at least one outlet of a distributor being connected to the inlet of a subsequent distributor.

The valve assembly includes a main valve body defining a first inner cylindrical cavity, a support plate positioned above the main valve body, and an upper valve head positioned above the support plate. The upper valve head includes a bottom planar bottom surface and a plurality of discrete conduits, each conduit extending between an outer end and an inner end. The valve assembly further includes a sealing diaphragm interposed between the support plate and the upper valve head. The diaphragm can be engaged by plungers to selectively open or close corresponding gas circuits.

Disclosed is a valve having: a body that has an upstream end and a downstream end; an inlet orifice; a plurality of passages including: a first outlet passage extending into the body from the downstream end to a location intermediate the upstream end and the downstream end of the body; an inlet passage extending into the body from the upstream end of the body, the plurality of passages extending along mutually parallel axes, wherein the axes are offset radially and/or circumferentially from each other; and the inlet passage being formed in an insert configured for axially moving to: fluidly engage with the first outlet passage to define a continuous fluid passage between the upstream end and the downstream end of the body, wherein: an output flow rate through the body increases or decreases depending on an axial location of the insert.

Hydraulic system comprising a three-way valve, the three-way valve comprising a first port for the connection to a primary heat exchanger through the circulation pump, a second port and a third port for connection to the heating circuit and to a secondary heat exchanger, respectively. The three-way valve is switchable between two positions in which the first port is in fluid communication with the second port or with the third port. The three-way valve is responsive to the pressure applied by a circulation pump, and has a displaceable obstructing member that may be moved due to transitions between an off-state and an on-state of the circulation pump. The obstructing member comprises a pair of sealing surfaces facing away from each other and suitable to engage reciprocatingly respective opposed seats of the three-way valve.

Three-way valve drivable by a pump, switchable between at least two switch positions wherein a first port is selectively in fluid communication with a second port or with a third port. The three-way valve comprises a movable support and a pair of obstructing members carried by the movable support, at least one of which is responsive to the pressure applied by the pump at the first port, at least one of the movable support and obstructing members to being movable due to transitions between an off-state and an on-state of the circulation pump. The obstructing members are adapted to engage reciprocatingly the respective seats of the three-way valve. The obstructing members are capable of changing shape synchronously when the pump switches from the off-state to the on-state.

A water pump of an engine cooling system includes a thermal valve that divides an outlet space of a pump housing of an outlet port, through which the engine coolant pumped into the internal space of a pump housing is discharged, into a front end discharge region and a rear end discharge region. The thermal valve also forms a dual flow path through which the engine coolant is discharged to the front end discharge region and the rear end discharge region according to the increase of the coolant temperature. The cooling of a cylinder block and a cylinder head of an engine are thus separately adjusted.

A valve (10) includes a first case member (101) having an inflow port (H1) and a first valve seat (VS), a second case member (105) having an air outlet (H2) and a discharge port (H3), a valve chamber formed by bonding the first case member (101) and the second case member (105), at least one of which has a recessed shape, with a first bonding member (300) while the recessed shape is located on an inner side, and a diaphragm (150) formed so as to partition the valve chamber into a lower valve chamber (106) connected to the inflow port (H1) and an upper valve chamber (107) connecting the discharge port (H3) and the air outlet (H2).