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Patent Searching and Data


Title:
CHECK VALVE DEVICE
Document Type and Number:
Japanese Patent JP3296194
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a check valve device having a simple structure, which can surely relieve increased pressure from a primary side into a secondary side.
SOLUTION: A guide member 50 is coaxially arranged in a sleeve 42, and is held by a ring 52. A valve rod of a check valve member is extended through the guide member 50. This valve rod is provided at its one end with a flange. When the pressure is excessively increased on a secondary side S2 due to a temperature rise or water hammer, the flange 58A is retracted in a water pressure receiving direction, overcoming the urging force of a coned disc spring 80, and accordingly, a second rubber element 92 and a core plate 60a are separated from each other, and accordingly, water pressure on the second water pressure side S2 leaks into a primary water pressure side S1. Thereby it is possible to relieve increased pressure from the secondary side S2 into the primary side S1.


Inventors:
Hiromi Takahashi
Application Number:
JP18754096A
Publication Date:
June 24, 2002
Filing Date:
July 17, 1996
Export Citation:
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Assignee:
Inax Co., Ltd.
International Classes:
F16K1/36; F16K15/06; F16K15/18; F16K17/04; F16K47/02; (IPC1-7): F16K47/02; F16K15/06
Domestic Patent References:
JP63187779U
JP4919329U
JP62117363U
JP2110769U
JP3105775U
Attorney, Agent or Firm:
Takeshi Shigeno