Patent ID: 7789325

Claim:
A spray device comprising: a body portion having a fluid passageway therein; a spray nozzle affixed to the body portion, the spray nozzle including a discharge orifice for directing fluid from the fluid passageway in the body portion in a predetermined spray pattern; a valve needle supported in the body portion and spray nozzle for movement between an open position for permitting fluid discharge through the discharge orifice and a closed position for preventing fluid discharge through the discharge orifice; a control piston assembly for controlling movement of the valve needle, said control piston assembly being movably supported in the body portion and being non-mechanically coupled to the valve needle by magnetic attraction, said control piston assembly including at least a first magnet, a second magnet affixed to the valve needle, and said first and second magnets being arranged so as to produce the magnetic attraction therebetween.