JPS5947565U

JPS5947565U - master cylinder

Info

Publication number: JPS5947565U
Application number: JP14356082U
Authority: JP
Inventors: 竹内　裕明; 光男池田; 小椋　修
Original assignee: アイシン精機株式会社
Priority date: 1982-09-23
Filing date: 1982-09-23
Publication date: 1984-03-29
Also published as: JPS6230828Y2

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の断面図、第２図は他実施例
の要部を示す図である。１・・・シリンダボディ、１ａ・・・段付シリンダの大
径部、１ｂ・・・段付シリンダの小径部、２・・・プラ
イマリピストン（段付ピストン）、６・・・カップシー
ル、７・・・第１圧力室、８・・・第２圧力室、１ｃ・
・・リザーバ接続口、１６・・・リザーバ、１９・・・
弁座、２１・・・逆止弁、２０．２６・・・スプリング
、２５・・・ボール。FIG. 1 is a sectional view of one embodiment of the present invention, and FIG. 2 is a diagram showing main parts of another embodiment. DESCRIPTION OF SYMBOLS 1... Cylinder body, 1a... Large diameter part of stepped cylinder, 1b... Small diameter part of stepped cylinder, 2... Primary piston (stepped piston), 6... Cup seal, 7 ...First pressure chamber, 8...Second pressure chamber, 1c.
...Reservoir connection port, 16...Reservoir, 19...
Valve seat, 21...Check valve, 20.26...Spring, 25...Ball.

Claims

[Scope of utility model registration request]

A stepped piston is slidably fitted into the stepped cylinder of the cylinder body to form a first pressure chamber in the large diameter portion and a second pressure chamber in the small diameter portion of the stepped cylinder, and the stepped piston is fitted into the stepped cylinder of the cylinder body. A reservoir connection port is provided near the boundary between the large diameter portion and the small diameter portion of the stepped cylinder, and a through hole that reaches the first pressure chamber from the bottom surface of the reservoir connection port and the second pressure chamber from the bottom surface of the reservoir connection port are provided. A compensation hole reaching the chamber and an outlet communicating with the second pressure chamber are provided, and the small diameter portion of the stepped piston is provided with a hole that communicates with the compensation hole and the second pressure chamber when the stepped piston is operated from its return position. A cup seal is installed to shut off the water, so that when the pressure in the first pressure chamber is higher than the pressure in the second pressure chamber, the liquid in the first pressure chamber flows into the second pressure chamber through the circumference of the cup seal. A valve seat having a seal ring attached to the outer periphery is fitted and fixed in the opening of the reservoir connection port, and has a hollow shaft portion passing through the inner hole of the valve seat, and an upper end of the hollow shaft portion. A check valve is provided which is seated on the lower surface of the valve seat by means of a spring interposed between an elastic cap with a hole fitted in the valve seat and a spring interposed between the valve seat and a ball inside the shaft of the check valve. A master cylinder' characterized by being equipped with a relief valve consisting of an interposed spring.