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Patent Searching and Data


Title:
BACKFLOW PREVENTION DEVICE AND BATH WATER HEATER
Document Type and Number:
Japanese Patent JP2017166676
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a backflow prevention device and bath water heater excellent in sealability with a simple structure having a small number of components.SOLUTION: An atmospheric release valve 13 includes a valve housing part 210, a lid member 21D and a valve body 130. The valve housing part 210 is formed integrally with the body part 21, and has an opening part 210a. The lid member 21D is configured to close the opening part 210a, and constitutes an atmospheric release valve chamber between itself and the valve housing part 210. The valve body 130 is arranged in the atmospheric release valve chamber, and configured to receive force in a closing direction with pressure P1 inside a primary side flow passage 22. The lid member 21D has a pressure charge passage 26 connecting the atmospheric release valve chamber and the primary side flow passage 22, and is attached to the valve housing part 210 with fixation from one direction.SELECTED DRAWING: Figure 6

Inventors:
OUCHI RYOJI
OGAWA KYOHEI
Application Number:
JP2016055161A
Publication Date:
September 21, 2017
Filing Date:
March 18, 2016
Export Citation:
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Assignee:
NORITZ CORP
International Classes:
F16K24/00; A47K3/00
Domestic Patent References:
JP2012097787A2012-05-24
JPH0354716U1991-05-27
JP2008069795A2008-03-27
JP2015025492A2015-02-05
JP2009270698A2009-11-19
Attorney, Agent or Firm:
Fukami patent office