| 摘要 |
As the primary piston 3 is driven forward, a cup seal 32 moves forwardly of a communication path 17c in a first sleeve 17 to interrupt a communication between a first reservoir chamber 11 and the first liquid pressure chamber 5, thus generating a liquid pressure in the first liquid pressure chamber 5. As the secondary piston 10 is driven forward, a cup seal 25 moves forwardly of a communication path 18c, interrupting a communication between a second reservoir chamber 19 and a second liquid pressure chamber 6, thus generating a liquid pressure in the second liquid pressure chamber 6. The invention provides a master cylinder 1 which is simple in construction and inexpensive to manufacture.
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