JPS6030869U

JPS6030869U - Negative pressure booster

Info

Publication number: JPS6030869U
Application number: JP12302683U
Authority: JP
Inventors: 理治西井; 陽一古田; 薫坪内; 村田　武夫; 柴谷　寿一; 桐山　隆
Original assignee: アイシン精機株式会社; トヨタ自動車株式会社
Priority date: 1983-08-08
Filing date: 1983-08-08
Publication date: 1985-03-02

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]

図は本考案の一実施例を示す縦断側面図である。符号の説明、１０・・・ダイアフラム、１４・・・ピス
トンボディ、１６・・・フロントシェル、１８・・・リ
ヤシェル、３２・・・吸音材、Ｒ１・・・定圧室、Ｒ２
・・・変圧室、■・・・バルブ機構。The figure is a longitudinal sectional side view showing an embodiment of the present invention. Explanation of symbols, 10...Diaphragm, 14...Piston body, 16...Front shell, 18...Rear shell, 32...Sound absorbing material, R1...Constant pressure chamber, R2
...pressure change chamber, ■...valve mechanism.

Claims

[Scope of utility model registration request]

The inner peripheral edge of the diaphragm is airtightly assembled to the piston body, and the outer peripheral edge of the diaphragm is airtightly assembled to the shell, so that a constant negative pressure is always applied to one side of the diaphragm within the shell. In the negative pressure booster, the negative pressure booster comprises a chamber and a variable pressure chamber that selectively communicates with the constant pressure chamber or the atmosphere in the vehicle interior by a valve mechanism provided on the piston body on the other side of the diaphragm. A negative pressure type characterized in that a sound absorbing material is provided on the inner wall of the shell forming a variable pressure chamber.