Bridgestone Corporation

Kayaba Industry Company, Ltd.

Hisato Imaeda

Masaru Fukushima

Kazuhiko Hayashi

A bellows () of a dust boot () having large diameter parts () and small diameter parts () disposed alternately covers a piston rod (R) projecting from a cylinder (C). A bump stopper (B) fixed to the cylinder (C) projects into the bellows () as a projecting portion. The bellows () comprises a first section (M) which passes a projecting end of the projecting portion according to the elongation and contraction of the piston rod (R) and a second section (L) located therebelow. By making the small diameter parts in the second section (L) have a smaller inner diameter than the small diameter part located at a boundary between the first section (M) and the second section (L), the bellows () can be made slim without interfering with the bump stopper (B).

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Tokyo, Japan

Hisato Imaeda