发明名称 |
Solenoid-operated two-way directional needle-valve, normally closed |
摘要 |
The valve described herein comprises a movable core (28) which is drawn toward a fixed core (21) once the valve is opened by excitation of its coil, or solenoid (24). The valve's needle-obturator (17) is capable of moving axially with respect to the movable core (28) but, upon the coil's being excited, remains thrust into the orifice (16) during a first opening stage while the movable core only (28) is caused to rise. Subsequently-once the movable core (28) arrives within a few millimeters of the fixed core-a shoulder (51) offered by the movable core to a shoulder (18) incorporated in the obturator (17) duly makes contact and draws the latter upward, whereupon the action of a spring (27) overcomes such resistance as is offered by a further spring (19) and the obturator itself (17) is raised to a generous distance from its seat in orifice (16) aforesaid.
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申请公布号 |
US4592533(A) |
申请公布日期 |
1986.06.03 |
申请号 |
US19820418618 |
申请日期 |
1982.09.16 |
申请人 |
EDI SYSTEM S.R.L. |
发明人 |
GUGLIELMI, MAURO;PIGHETTI, ANTONIO;VEZZANI, SAVINO;ACERBI, SERGIO |
分类号 |
F16K31/06;F16K31/40;(IPC1-7):F16K31/124;F16K31/02 |
主分类号 |
F16K31/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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