Title:
CHECK VALVE
Document Type and Number:
Japanese Patent JP2016001039
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a check valve excellent in resistance against a downstream positive pressure and ensuring an appropriate drain flow rate.SOLUTION: A check valve 1 is generally funnel-shaped in a front view and generally cylindrical in a side view, includes a drain channel inside, is formed of an elastic material such as silicon, and comprises: an attachment portion 2; an inclined surface 3; a cutoff surface 4; and a cylindrical portion 6. The cutoff surface 4 is a valve part formed by abutment of inner surfaces of the check valve, and a notch 5 is formed at the center to range from a lower end to an intermediate portion of the cutoff valve 4. The notch 5 is generally V-shaped in a side view and formed to be gradually wider in a horizontal direction toward a downstream side.
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Inventors:
MATSUMURA HIDEYUKI
SASAGAWA TOMOHISA
SASAGAWA TOMOHISA
Application Number:
JP2014121384A
Publication Date:
January 07, 2016
Filing Date:
June 12, 2014
Export Citation:
Assignee:
MARUICHI CORP
International Classes:
F16K15/14; E03C1/292; E03C1/298
Domestic Patent References:
| JPH0158873U | 1989-04-13 | |||
| JPS56139066U | 1981-10-21 | |||
| JPH0158873U | 1989-04-13 | |||
| JPS56139066U | 1981-10-21 |