Patent ID: 8851118

Claim:
A solenoid valve comprising three mouths and three operating positions, wherein said three mouths comprise: a first mouth for inlet of a working fluid; and a second mouth and a third mouth for outlet of the working fluid, and wherein said three operating positions comprise: a first operating position, in which a passage of fluid from said first mouth to said second mouth and third mouth is enabled, a second operating position, in which a passage of fluid from said first mouth to only one of said second and third mouths is enabled, and a third operating position, in which the passage of fluid from the first mouth to the second mouth and the third mouth is disabled, said solenoid valve further comprising an electromagnet that can be controlled to cause a switching of the operating position, wherein the solenoid valve comprises a first open/close element and a second open/close element co-operating, respectively, with a first contrast seat and a second contrast seat, wherein said first open/close element and said first contrast seat are provided for controlling the passage of fluid from said first mouth to said third mouth, and wherein said second open/close element and said second contrast seat are provided for regulation of the passage of fluid from said first mouth to said second mouth, and wherein said solenoid can be actuated for impressing on said second open/close element: a first movement whereby said second open/close element is brought into contact with said second contrast seat disabling the passage of fluid from said first mouth to said second mouth providing a switching from said first operating position to said second operating position, a second movement, subsequent to said first movement, whereby said second open/close element moves said first open/close element against said first contrast seat disabling the passage of fluid from said first mouth to said third mouth and providing a switching from said second operating position to said third operating position, wherein during said second movement the second open/close element is in contact with said second contrast seat, wherein said first open/close element and second open/close element are coaxial to one another and hydraulically balanced, wherein the solenoid valve comprises a jacket slidably mounted within which is said first open/close element, wherein said first mouth, second mouth, and third mouth of said solenoid valve are provided on said jacket, and wherein said first contrast surface is provided on said jacket and said second contrast surface is provided on said first open/close element.