Electromagnetic flapper valve
AssigneeTekyo Keiki Company Limited
InventorsShinji Saito, Masao Suzuki
Life of this patent
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Abstract
An electromagnet is mounted on a ferromagnetic support member. A ferromagnetic flapper valve element arranged to control fluid flow from a nozzle orifice is movably mounted on the ferromagnetic support member and controllably moved by the electromagnet. The electromagnet, the support member and the valve element form a substantially closed magnetic circuit with an air gap being provided between the electromagnet and the valve element. Ferromagnetic and paramagnetic spacers are disposed between the electromagnet and the support member. The air gap between the electromagnet and the valve element is determined by the combined thickness of the spacers and another gap in the magnetic circuit is determined by the thickness of the paramagnetic spacer.
Claims9
An electromagnetic flapper valve having a fluid discharge orifice, a ferromagnetic valve element for movably controlling fluid flow through the orifice, an electromagnet arranged to controllably move said valve element and comprising a core and an electric coil wound around said core, and a ferromagnetic support member supporting said valve element and said electromagnet so that said valve element, said support member and said core of the electromagnet are arranged in a substantially closed magnetic circuit, a ferromagnetic spacer and a paramagnetic spacer, said spacers being mounted in series between the core and the support member in substantially said closed magnetic circuit, the combined thickness of said spacers having a predetermined value and the thickness of the paramagnetic spacer comprising a predetermined gap between the core and the valve element substantially in said closed magnetic circuit.
Dependencies are inferred from the claim text.