Title:
FLOW CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2020/170600
Kind Code:
A1
Abstract:
The present invention comprises: a valve casing (2) comprising a primary chamber (5) and a secondary chamber (6); a valve seat (14) provided inside the valve casing (2); a valve body (25) that can be seated on the valve seat (14); a needle (17) that is continuous with the valve body (25); a motor mechanism for moving the needle (17) along the axial direction of the needle (17) to switch between a closed state in which the valve body (25) is seated on the valve seat (14) and an open state in which the valve body (25) is withdrawn from the valve seat (14); a pressure-receiving chamber (26) provided on the upper surface of the valve body (25); and a conductive pathway, provided within the valve body (25), that is constituted by a first communicating groove (23) and a second communicating groove (24) that cause the secondary chamber (6) and the pressure-receiving chamber (26) to communicate. The diameter (PB) of the upper surface of the valve body (25) constituting the lower surface of the pressure-receiving chamber (26) is slightly larger than the diameter (PA) of the lower surface of the valve body (25) constituting the upper surface of the secondary chamber (6).
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Inventors:
KONDO HIROSHIGE (JP)
Application Number:
PCT/JP2019/050589
Publication Date:
August 27, 2020
Filing Date:
December 24, 2019
Export Citation:
Assignee:
TIME ENG CO LTD (JP)
International Classes:
F16K31/04; F16K39/02
Foreign References:
| JPS6034160U | 1985-03-08 | |||
| JP2018132100A | 2018-08-23 | |||
| JPS6043152B2 | 1985-09-26 |
Other References:
See also references of EP 3929477A4
Attorney, Agent or Firm:
HIROE AND ASSOCIATES, PATENT PROFESSIONAL CORPORATION (JP)
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