Title:
通気弁と排水管システム
Document Type and Number:
Japanese Patent JP7446700
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a vent valve and a drain pipe system which can be installed in a piping space substantially the same as a vent pipe by preventing increase in size in a pipe diameter direction with a simple structure, which maintains a closed valve state while exhibiting high sealability at an atmospheric pressure or a positive pressure, and in which a valve body operates with high responsiveness in a state where a ventilation amount is largely secured while suppressing ventilation resistance small when a negative pressure generates, and which surely solves the negative pressure while suppressing a chattering phenomenon.SOLUTION: A vent valve is provided in an openable/closable manner by a disc-like valve body 23 rotatably incorporated via a rotary shaft 24 in a cylinder body 20. The disc-like valve body 23 can suck air from the outside by generating unbalance torque rotating in a valve opening direction via the rotary shaft 24 at a negative pressure in the cylinder body 20. At an atmospheric pressure or a positive pressure in the cylinder body 20, unbalance torque rotating in a valve closing direction is generated via the rotary shaft 24, and the valve is brought into a closed state.SELECTED DRAWING: Figure 1
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Inventors:
Kazuhiro Aoki
Hiroshi Obata
Tatsuro Kobayashi
Hiroshi Obata
Tatsuro Kobayashi
Application Number:
JP2017146959A
Publication Date:
March 11, 2024
Filing Date:
July 28, 2017
Export Citation:
Assignee:
KITZ CORPORATION
International Classes:
F16K24/06; E03C1/122; F16K1/22; F16K15/03
Domestic Patent References:
| JP242283A | ||||
| JP2004257521A | ||||
| JP725062U | ||||
| JP2005214007A | ||||
| JP9170665A | ||||
| JP2008308824A |
Foreign References:
| US3941151 |
Attorney, Agent or Firm:
Tetsuo Kobayashi