Title:
CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2020/195320
Kind Code:
A1
Abstract:
This control valve includes a casing, a valve body, and a seal cylindrical member (131). The casing has an inlet and an outlet. The valve body is rotatably arranged within the casing, and has a circumferential wall part having formed a valve hole for communicating between the inside and outside. The seal cylindrical member (131) has one end communicating with the outlet, and the other end provided with a valve sliding contact surface (141a). The other end of the seal cylindrical member (131) has a protrusion height varying continuously in a circumferential direction, along the shape of an outer circumferential surface of the circumferential wall part. A small outside diameter part (55) of which a length (L) from the axial center of the seal cylindrical member (131) to the outer circumferential surface is shorter than in other areas is provided in an area of the other end of the seal cylindrical member (131) which has a higher protrusion height.
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Inventors:
OZEKI AKIFUMI (JP)
Application Number:
PCT/JP2020/006017
Publication Date:
October 01, 2020
Filing Date:
February 17, 2020
Export Citation:
Assignee:
YAMADA MFG CO LTD (JP)
International Classes:
F16K5/04; F01P7/16; F16K39/06
Foreign References:
| JP2018179122A | 2018-11-15 | |||
| CN108708985A | 2018-10-26 | |||
| JP2019007614A | 2019-01-17 | |||
| JPS4519272B |
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
Download PDF:
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