JPS60194672U

JPS60194672U - check valve

Info

Publication number: JPS60194672U
Application number: JP8195584U
Authority: JP
Inventors: 進　善一
Original assignee: エヌオーケー株式会社
Priority date: 1984-06-04
Filing date: 1984-06-04
Publication date: 1985-12-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係るチェック弁の断面図、
第２図は従来のチェック弁の一例を示す断面図である。２１・・・アッパケース、２２・・・連通管、２３・・
中アケース、２４・・・通気管、２５・・・ダイアフラ
ム、２６．２７・・・室、２８・・・連結管、２９・・
・管路、３０・・・ロッド、３１・・・バルブ。FIG. 1 is a sectional view of a check valve according to an embodiment of the present invention;
FIG. 2 is a sectional view showing an example of a conventional check valve. 21... Upper case, 22... Communication pipe, 23...
Middle case, 24...Vent pipe, 25...Diaphragm, 26.27...Chamber, 28...Connecting pipe, 29...
・Pipe line, 30...rod, 31...valve.

Claims

[Scope of utility model registration request]

The inside of the case is divided into two chambers using a diaphragm, one chamber is communicated with a negative pressure signal source, the other chamber is opened to the atmosphere, and a pipe is opened for communication from the negative pressure signal source to the other chamber. a spring for pressing and biasing the diaphragm toward the other chamber is inserted in the one chamber, and the other chamber has an effective area smaller than the effective area of the diaphragm, and A check valve comprising a normally closed valve that opens and closes an opening of the conduit in conjunction with the operation of a diaphragm.