公开(公告)号：US12000445B2

公开(公告)日：2024-06-04

申请号：US17416896

申请日：2019-12-02

Applicant: Hitachi Astemo, Ltd.

Inventor： Takahito Osada ,  Shigeru Hayashi ,  Shinya Watanabe

IPC: F16D65/16 ,  F16J15/52 ,  F16D121/02

CPC classification number: F16D65/16 ,  F16J15/52 ,  F16D2121/02

Abstract: A disc brake including: a piston; a cylinder including a bore portion, which movably accommodates the piston, and a step portion formed on an opening end side of the bore portion; and a piston boot arranged between a tip side of the piston and a small diameter step portion of the cylinder. The piston boot includes: a large diameter annular fitting portion containing an annular metal member so as to be fitted to the small diameter step portion; a bellows portion, which extends from the large diameter fitting portion, is increased in its diameter from the large diameter fitting portion to an outer peripheral side, and is also deformed and extended from the large diameter fitting portion toward an inner peripheral side; and a small diameter fitting portion formed at an end portion of the bellows portion so as to fit to an outer periphery of the piston.

公开(公告)号：US12066067B2

公开(公告)日：2024-08-20

申请号：US17414394

申请日：2019-12-02

Applicant: Hitachi Astemo, Ltd.

Inventor： Takahito Osada ,  Shigeru Hayashi ,  Yorihito Miura ,  Yusuke Shigeta ,  Masahiko Kamesawa

IPC: F16D65/097 ,  F16D55/227 ,  F16D55/00

CPC classification number: F16D55/227 ,  F16D65/0977 ,  F16D2055/0041 ,  F16D2250/0046

Abstract: Protruding portions protruding in a direction of approaching a disc rotor are integrally formed in a locking plate portion of a pad spring. Moreover, an insulating resin coating is formed on a front surface side (surface in a region opposed to an outer peripheral surface of the disc rotor) of the locking plate portion. The coating film formed on the front surface of the locking plate portion flows downward by its own weight before the coating material is solidified. As a result, the coating film formed on bottom surfaces (front surfaces of protrusions) of the protruding portions is thinner in film thickness than that of the coating film in other region.