Check valve

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Description

1.1 : Front

1.2 : Back

1.3 : Left

1.4 : Right

1.5 : Top

1.6 : Bottom

1.7 : Cross sectional

1.8 : Perspective

1.9 : Perspective

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
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
Foreign Patent Documents
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
Classifications
Current U.S. Class: Check (D23/237)