Patent ID: 7484528

Claim:
A valve with a valve housing, which encompasses a pressure chamber and possesses at least two valve ports which open into the pressure chamber, whereby, in the pressure chamber at least one axially slidable valve stem exists, which controls at least one of the valve ports and which the at least one valve stem is movable between a closed position and an open position and the valve further encompasses at least one wire SMA element, the element having an SMA, as well as possessing a resetting element for the movement of the valve stems into the closure direction, comprising: the valve stem carries on its first end a port sealing element, whereby its second end is axially guided within the pressure chamber on a base plate which the plate extends itself transversely to the valve stems, the SMA element is affixed by its ends onto the base plate and is further attached to the valve stems with a midsection, whereby the legs of the SMA element, which extends themselves sway from the valve stems, open at an angle (β) to the base plate, between the valve ports and the SMA element is to be found a shield wall, defining, at least one opening penetrated by the first end of the valve stems.