Solenoid valve
AssigneeC.R.F. Societa Consortile per Azioni
InventorsSergio STUCCHI, Onofrio De Michele, Raffaele Ricco, Marcello Gargano, Chiara Altamura, Carlo Mazzarella
Life of this patent
Estimating the term…
Abstract
A solenoid valve comprises a first mouth for an inlet of a working fluid and a second mouth and a third mouth for an outlet of the working fluid. The valve has a first operating position in which a passage of fluid from the first mouth to the second mouth and the third mouth is enabled, a second operating position in which a passage of fluid from the first mouth to only one of the second and third mouths is enabled, and a third operating position in which the passage of fluid from the first to the second mouth and the third mouth is disabled.
Claims17
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,
- the solenoid valve being characterized in that it 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
- in that 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, and
- wherein moreover said first open/close element and second open/close element are coaxial to one another and hydraulically balanced.
Dependencies are inferred from the claim text.