COMMON VENTILATION SYSTEM FOR VERTICAL PIPE AND HORIZONTAL PIPE

Japanese Patent JP3490413

B2

PROBLEM TO BE SOLVED: To provide a common ventilation device for a vertical pipe and a horizontal pipe to be fitted to the vertical pipe and the horizontal pipe without necessity of changing the same ventilation system, solving the problem of a current ventilation system that a ventilation pipe is usually fitted to the vertical pipe and it is impossible to use the same ventilation valve in a case of fitting to the horizontal pipe, which necessitates preparation of two kinds of dedicated ventilation valves.
SOLUTION: This ventilation system is provided with an oblique end surface valve seat formed of an end surface of the ventilation pipe and a circular arc end surface having a diameter equal or the larger to/than the diameter of the ventilation pipe, a valve main body having a valve seat packing provided opposite to the end surface valve seat, two bearing parts provided in a lower surface side of the oblique valve seat and having a shaft hole for supporting the valve main body, and two support plates having a projecting part for supporting the valve main body at one end thereof and to be fitted in the shaft hole of the bearing parts freely to turn at the other end thereof. This ventilation system is installed so that the bearing parts are arranged in an upper side when fitting to the horizontal pipe.

Kihachiro Toda
Masao Ueki

JP2001196190A

January 26, 2004

June 28, 2001

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Toda Kogyo Co., Ltd.

E03C1/122; E03C1/295; F16K24/06; (IPC1-7): F16K24/06; E03C1/122; E03C1/295

JP10103549A
JP7252874A
JP2000257734A
JP58170473U
JP729384U
JP5439048B1

Yukihiko Takada (1 outside)

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