Valves and valve actuation – Electrically actuated valve – Including solenoid
Reexamination Certificate
2006-10-10
2006-10-10
Jacyna, J. Casimer (Department: 3751)
Valves and valve actuation
Electrically actuated valve
Including solenoid
C251S205000, C251S129180, C251S282000, C137S506000
Reexamination Certificate
active
07118088
ABSTRACT:
To provide a fluid control valve which is capable of preventing or suppressing degradation of the accuracy of flow rate control dependent on the lift amount of a valve element from a valve seat. An expansion valve is configured such that a valve portion and a valve portion integrally formed with a valve element move to and away from a valve seat and a valve seat, respectively, simultaneously. Further, the expansion valve is configured such that a flow passage cross-section formed by a gap between the valve portion and the valve seat, and a flow passage cross-section formed by a gap between the valve portion and the valve seat have approximately the same size when the expansion valve is open. As a result, it is possible to almost cancel the influence of changes in effective pressure-receiving areas acting on the respective valve elements when the expansion valve is open, on the pressure balance, thereby making it possible to prevent degradation of the accuracy of flow rate control dependent on the lift amount of the valve elements.
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Patent Abstracts of Japan, Publication No. 2002-372164, published on Dec. 26, 2002.
Jacyna J. Casimer
TGK Co. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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