Check valve
Description
An inner wall surface on the out-course side of a flow channel in an inlet pipe body portion is curved from an inlet port to an outlet pipe body portion. A part of an outer wall surface on the in-course side of the flow channel in the inlet pipe body portion protrudes outward in a curved shape while the inner wall surface is depressed outward. A valve stem is positioned on a bias toward the outlet pipe body section from the center of the inlet port in the bottom view.
Claims
The ornamental design for a check valve as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
D242797 | December 21, 1976 | Johnson |
D426617 | June 13, 2000 | Hansen |
20200206796 | July 2, 2020 | Ishizaki |
20220316612 | October 6, 2022 | Ishizaki |
20240133474 | April 25, 2024 | Ishizaki |
305441555 | November 2019 | CN |
306119711 | October 2020 | CN |
306488388 | April 2021 | CN |
306895069 | October 2021 | CN |
306901211 | October 2021 | CN |
1074831 | June 2000 | JP |
1074961 | June 2000 | JP |
Patent History
Patent number: D1057094
Type: Grant
Filed: Sep 7, 2022
Date of Patent: Jan 7, 2025
Inventors: Nobuyuki Ishizaki (Tokyo), Takeshi Ouchi (Tokyo), Eiji Hara (Tokyo)
Primary Examiner: Gino Colan
Application Number: 35/518,226
Type: Grant
Filed: Sep 7, 2022
Date of Patent: Jan 7, 2025
Inventors: Nobuyuki Ishizaki (Tokyo), Takeshi Ouchi (Tokyo), Eiji Hara (Tokyo)
Primary Examiner: Gino Colan
Application Number: 35/518,226
Classifications
Current U.S. Class:
Check (D23/237)