Title:
DUCKBILL VALVE
Document Type and Number:
Japanese Patent JP2018096436
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a duckbill valve capable of making a slit hardly opened and improving its air-tightness.SOLUTION: This invention relates to a duckbill valve 1 for use in restricting a flow of fluid from an extremity end side toward a base end direction comprising: a cylindrical main body part 11; a pair of slant parts 14 arranged at an inner peripheral surface spaced apart by a predetermined spacing from the extremity end of the main body part 11 and extending in slant manner from the base end side toward the extremity end direction to cause its extremity end to be converged; a linear line slit 15 that can be opened or closed to form while extremity ends of both slant parts 14 are being contacted therewith; protrusions 13 arranged at an outer peripheral surface of the main body part 11 and extending along an axis line of the main body part 11; and ribs 16 extending from a position at the inner peripheral surface of the main body part 11 where they oppose against the protrusions 13 up to the slant parts 14.SELECTED DRAWING: Figure 2
Inventors:
MIYAZAKI TAKUYA
SAITO HIROSHI
SAITO HIROSHI
Application Number:
JP2016240749A
Publication Date:
June 21, 2018
Filing Date:
December 12, 2016
Export Citation:
Assignee:
TOP CO LTD
International Classes:
F16K15/14; A61B1/00; A61B17/34
Domestic Patent References:
| JP2010270800A | 2010-12-02 | |||
| JP2002505920A | 2002-02-26 |
Foreign References:
| US4960412A | 1990-10-02 | |||
| US3517682A | 1970-06-30 |
Attorney, Agent or Firm:
Creation International Patent Office