Title:
凍結破損防止型空気弁
Document Type and Number:
Japanese Patent JP7361863
Kind Code:
B2
Abstract:
To provide an air valve including a structure which can reliably deal with freezing damage while maintaining simple disassemblability without complicating its structure and assembly work, can be applied very easily to existing air valves, and can be utilized readily for a mouth ring of a fire hydrant etc.SOLUTION: An air valve includes: an inflow port 20 provided at a lower part of a valve box 1; a float valve element 3 housed in a guide cylinder body 2 disposed in the valve box; and a floating valve element 4 located above the float valve element 3 and having a small air hole 37. A freezing damage prevention unit 61 having a large air hole 12 and an expansion absorption chamber 65 is detachably attached to the valve box through fixing means 11 at an opening provided at an upper part of the valve box.SELECTED DRAWING: Figure 1
Inventors:
Naoki Kadoi
Keiichi Wakabayashi
Naoki Suzuki
Keiichi Wakabayashi
Naoki Suzuki
Application Number:
JP2022166847A
Publication Date:
October 16, 2023
Filing Date:
October 18, 2022
Export Citation:
Assignee:
Shimizu Alloy Co., Ltd.
International Classes:
F16K24/00; F16K31/18
Domestic Patent References:
| JP55022592U | ||||
| JP2015117827A | ||||
| JP10169816A | ||||
| JP2005061618A |
Foreign References:
| US20180149287 |
Attorney, Agent or Firm:
Tetsuo Kobayashi