JPS619672U

JPS619672U - piston cup

Info

Publication number: JPS619672U
Application number: JP1984093496U
Authority: JP
Inventors: 繁坂本; 三喜男五味
Original assignee: トヨタ自動車株式会社
Priority date: 1984-06-22
Filing date: 1984-06-22
Publication date: 1986-01-21

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 drawings]

第１図はブレーキマスクシリンダの内部構造をその中心
軸に平行な平面で切断した上半部の一部を示す縦断面図
、第２図はプライマリカツプの自由状態における形状を
その中心軸に平行な平面で切断した上半部を示す縦断面
図、第３図はプラマリカップの■矢視全体側面図である
。１・・・マスクシリンダの一例たるブレーキマスクシリ
ンダ、２・・・シリンタ、３・・・ピストンの一例たる
第２ピストン、４・・・ピストンカツプの一例たるプラ
マリカップ、８・・・外側リップ部、８ａ・・・外周壁
、１０・・・内側リップ部、１１・・・ベース部、１２
・・・レコード溝。Figure 1 is a vertical cross-sectional view of a part of the upper half of the internal structure of the brake mask cylinder taken along a plane parallel to its central axis, and Figure 2 shows the shape of the primary cup in its free state parallel to its central axis. FIG. 3 is a vertical sectional view showing the upper half cut along a plane, and FIG. DESCRIPTION OF SYMBOLS 1... Brake mask cylinder which is an example of a mask cylinder, 2... Cylinder, 3... Second piston which is an example of a piston, 4... Primary cup which is an example of a piston cup, 8... Outer lip Part, 8a... Outer peripheral wall, 10... Inner lip part, 11... Base part, 12
...Record groove.

Claims

[Scope of utility model registration request]

A piston cup of a mask cylinder, which is rotatably attached to the piston and is comprised of an outer lip portion and an inner lip portion that are fitted between the cylinder and the piston and have a conical ring shape, and a base portion that connects these lip portions. A piston cup characterized in that a spiral record groove is provided in a conical outer peripheral wall connecting a maximum outer diameter point and a minimum outer diameter point of the outer lip portion.