| 摘要 |
<p>A housing (1) is formed as a bottomed cylinder with a bottom surface (1a). In the housing (1), there are accommodated and sequentially arranged an annular disc spring (21), a parking piston (11), a reaction force receiving member (2), a service piston (10), discs (9) and a pressure receiving member (3), etc. in that order as from the bottom surface (1a) side, with an annular cover (4) being fixed to the end portion of the housing (1) on the opposite side of the bottom surface (1a). The disc spring (21) urges the parking piston (11) toward the service piston (10), and the bottom surface (1a) of the housing (1) constitutes a support surface for supporting the disc spring (21). The reaction force receivingmember (2) functions as a reaction force receiving member common to the service piston (10) and the parking piston (11). <IMAGE></p> |
