Valve capable of bidirectional flow
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 30, 1987
Grant Date -
N/A
app pub date -
Mar 27, 1986
filing date -
Apr 3, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved valve structure is disclosed, which comprises a sleeve containing a valve chamber and a valve seat therein, a valve body slidably accommodated in the sleeve and having a spherical surface, an axial port formed in the sleeve so as to communicate with the valve seat, a front chamber formed between the valve body and the valve seat, a side port formed in the side wall of the valve chamber and communicated with the front chamber, a spring receiver provided at an end of the sleeve in the opposite direction to the valve seat, a rear chamber formed between the valve body and the spring receiver, a spring disposed between the spring receiver and the valve body to bias the valve body towards the valve seat, a communication passageway formed to communicate the front chamber with the rear chamber and having a smaller cross-section area than the side port, a control passageway provided in communication with the rear chamber to communicate the rear chamber with the exterior of the valve chamber, and a control valve provided in the control passageway.
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