Title:
DOUBLE CHECK VALVE
Document Type and Number:
WIPO Patent Application WO/2023/113268
Kind Code:
A1
Abstract:
According to an embodiment of the present disclosure, provided is a check valve comprising: an entrance end (100) in which a fluid flows; an outlet end (111) from which the fluid flowing from the entrance end is discharged; a housing (12) which is between the entrance end (100) and the outlet end (111), allows the fluid to be in communication between the entrance end (100) and the outlet end (111), and has an inclined surface formed in at least part of the inner surface, the diameter of the inclined surface increasing downward from the entrance end (100) to the outlet end (111); an outer valve (200) which is formed in a hollow column shape disposed in the housing (12), and comprises an outer inclined portion (206) formed at the corner of the upper surface and being in contact with the inclined surface of the housing (12), a first through-hole (201) formed from the upper surface, and a second through-hole (203) which is formed in the lower side of the first through-hole (201) and has the diameter greater than the first through-hole (201); and an inner valve (300) which is formed to be at least partially arranged in the outer valve (200), the inner valve (300) comprising a first body portion (301) formed in a column shape having the outer diameter less than the inner diameter of the first through-hole (201), and a second body portion (302) of a column shape which is formed on the lower portion of the first body portion (301), has an inclined surface at the corner of the upper surface, and is restricted from moving upward by the ceiling portion of the second through-hole (203).
Inventors:
NAM CHUNG WOO (KR)
LEE HO KIL (KR)
PARK JANG HUN (KR)
LEE HO KIL (KR)
PARK JANG HUN (KR)
Application Number:
PCT/KR2022/018318
Publication Date:
June 22, 2023
Filing Date:
November 18, 2022
Export Citation:
Assignee:
KOREA AUTOMOTIVE TECH INST (KR)
International Classes:
F16K27/02; F16K15/18; F16K27/00; F16K47/04
Foreign References:
| KR101578778B1 | 2015-12-18 | |||
| JP2015021609A | 2015-02-02 | |||
| KR20160041811A | 2016-04-18 | |||
| JPH08145742A | 1996-06-07 | |||
| KR20200081850A | 2020-07-08 |
Attorney, Agent or Firm:
HANOL INTELLECTUAL PROPERTY & LAW (KR)
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