Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Reexamination Certificate
1999-06-22
2001-03-27
Shaver, Kevin (Department: 3754)
Valves and valve actuation
Electrically actuated valve
Rotary electric actuator
C251S120000, C251S129010, C137S625170, C137S625120
Reexamination Certificate
active
06206342
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a seat valve for the control of pneumatic or hydraulic pressure between at least two pressure fluid channels.
German patent application No. 40 30 571 discloses an electromagnetic seat valve, closed in its de-energized condition, for the control of hydraulic pressure, which includes a magnetic armature to which a valve closure member is attached, and a spring that urges a valve closure member against a valve seat by a defined preload. The valve seat is mounted in the valve housing. Further, a magnetic core is accommodated in a thin-walled valve sleeve and a valve coil is secured to the valve sleeve. The winding of the valve coil is configured so that the magnetic armature performs exclusively a translatory movement so that the valve closure member is either opened or closed stroke-responsively as a function of the electromagnetic energization of the valve coil. This produces a binary switching behavior with relatively quick stroke movements. However, a variable adjustment of the rate of fluid flow is not permitted thereby.
An object of the present invention is to improve a seat valve of the type mentioned hereinabove by simple and functionally reliable means to such effect that in addition to the actual translatory movement of the valve closure member the rate of fluid flow can be adjusted variably with minimum possible electric energy demand.
SUMMARY OF THE INVENTION
According to the present invention, this object is achieved for a seat valve of the generic type by producing a rotary movement of the magnetic armature and transmitting the rotary movement to the valve closure member for a variable control of a pressure fluid passage.
Further features, advantages and possible applications of the present invention can be seen in the following in the description of two embodiments.
REFERENCES:
patent: 3206160 (1965-09-01), Bennett
patent: 3372371 (1968-03-01), Lesser et al.
patent: 5207410 (1993-05-01), Wakeman
patent: 5356112 (1994-10-01), Simar et al.
patent: 5381829 (1995-01-01), Adahan
patent: 3102232 (1981-11-01), None
patent: 4030571 (1992-04-01), None
patent: 4314581 (1994-11-01), None
patent: 0713813 (1996-05-01), None
Bonderer David A.
Continental Teves AG & Co. oHG
Rader & Fishman & Grauer, PLLC
Shaver Kevin
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