JPS51151424A - Negative pressure control device - Google Patents

Negative pressure control device

Info

Publication number
JPS51151424A
JPS51151424A JP50074420A JP7442075A JPS51151424A JP S51151424 A JPS51151424 A JP S51151424A JP 50074420 A JP50074420 A JP 50074420A JP 7442075 A JP7442075 A JP 7442075A JP S51151424 A JPS51151424 A JP S51151424A
Authority
JP
Japan
Prior art keywords
control device
negative pressure
pressure control
sound
peculear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP50074420A
Other languages
Japanese (ja)
Other versions
JPS5543111B2 (en
Inventor
Shigeo Tamaki
Toru Nakagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP50074420A priority Critical patent/JPS51151424A/en
Publication of JPS51151424A publication Critical patent/JPS51151424A/en
Publication of JPS5543111B2 publication Critical patent/JPS5543111B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Fluid Pressure (AREA)

Abstract

PURPOSE: Under the simple structure of making an atmospheric side chamber opened to an atmosphere elimination of a 'whistle sound', and the reduction of a noise (or a peculear sound) are both made possible.
COPYRIGHT: (C)1976,JPO&Japio
JP50074420A 1975-06-20 1975-06-20 Negative pressure control device Granted JPS51151424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50074420A JPS51151424A (en) 1975-06-20 1975-06-20 Negative pressure control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50074420A JPS51151424A (en) 1975-06-20 1975-06-20 Negative pressure control device

Publications (2)

Publication Number Publication Date
JPS51151424A true JPS51151424A (en) 1976-12-25
JPS5543111B2 JPS5543111B2 (en) 1980-11-04

Family

ID=13546674

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50074420A Granted JPS51151424A (en) 1975-06-20 1975-06-20 Negative pressure control device

Country Status (1)

Country Link
JP (1) JPS51151424A (en)

Also Published As

Publication number Publication date
JPS5543111B2 (en) 1980-11-04

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