| 摘要 |
<p>PURPOSE: To reduce the length of a master cylinder by boring a blind inner hole in the large diameter part of an intermediate piston, and causing a reaction piston secured to a main body to hermetically slide within the blind inner hole to define an auxiliary chamber inside the intermediate piston. CONSTITUTION: A hole 2 in a main body 1 is defined into pressure chambers 10 and 12 by an intermediate piston 5. The intermediate piston 5 is a stepped piston comprising a small diameter part opposite to the pressure chamber 10 and a large diameter part opposite to the pressure chamber 12. A blind inner hole 20 open to the pressure chamber 12 is formed in the large diameter part of the intermediate piston 5, and a reaction piston 22 secured to the main body 1 is hermetically slid within the blind inner hole 20 to define an auxiliary chamber 14. By selecting the diameters of the intermediate piston 5 and the reaction piston 22, action matching the purpose intended can be obtained, This constitution can reduce the length of a cylinder main body 1.</p> |
