| 摘要 |
<p>A master cylinder of the kind comprising within a stepped bore (24) a pair of aligned pistons (36, 38) which are slidingly guided by a bearing member (44) and by a sleeve (31), respectively, and which define with respective fixed seals (30, 32) a pair of pressure chambers (40, 42) connected to separate braking circuits of a vehicle and normally in communication with a fluid reservoir (28), and an auxiliary fast-fill chamber (50) provided between the bearing member (44) and the associated piston (36), said chamber being normally in communication with the fluid reservoir (28) and separated from one (40) of the pressure chambers by one (30) of the fixed seals and being communicable with said one pressure chamber past said one seal upon pressurization of the fluid to a predetermined value;</p><p>According to this invention, an additional fluid path between the auxiliary chamber (50) and the one pressure chamber (40) is provided through an opening (140) and an outer recess (136) formed in the bearing member (44) at its end (46) adjacent said one seal (30);</p><p>For use in braking systems for automotive vehicles.</p> |
