Title:
ディスクブレーキ及びピストンブーツ
Document Type and Number:
Japanese Patent JP6971401
Kind Code:
B2
Abstract:
A disk brake includes a cylinder including a bottomed bore portion in which a piston is received movably in an axial direction. The cylinder includes an annular small-diameter stepped portion formed on an opening edge side of the bore portion. The disk brake includes the piston configured to press a friction pad against a disk, and a piston boot disposed between a distal end side of the piston and the small-diameter stepped portion. The piston boot includes a large-diameter fitted portion configured to be fitted to the small-diameter stepped portion. An annular protrusion portion is provided on an inner peripheral side of the large-diameter fitted portion. The annular protrusion portion is shaped such that rigidity thereof against a force directed from the opening edge side toward a bottom portion side of the bore portion is lower than rigidity thereof against a force directed from the bottom portion side.
Inventors:
Takahito Nagata
Shigeru Hayashi
Satoshi Nakamura
Shigeru Hayashi
Satoshi Nakamura
Application Number:
JP2020527397A
Publication Date:
November 24, 2021
Filing Date:
June 14, 2019
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
F16D65/18; F16D55/22; F16J3/04; F16J15/52
Domestic Patent References:
| JP62158320U | ||||
| JP54113988U |
Foreign References:
| US3528301 | ||||
| US3490343 |
Attorney, Agent or Firm:
Hirowa Patent Office
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