| 摘要 |
<p>PURPOSE:To prevent foam from invading by fixing an oil tank with a conical botbom wall on the surface of the cylinder, arranging an oil chamber between them, and communicating the oil chamber and tank to each other through a penetrating hole or the oil chamber and the cylinder hole through a compensating hole. CONSTITUTION:When the piston 4 proceeds by the brake lever, the working oil in the oil pressure chambers springs out upward from the compensation hole 9 until it 9 closes by the piston cup 4a, but it is immediately checked by the bottom wall 14 of the oil tank 13 and the waterworks phenomenon into the oil tank 13 is controlled. Since the working oil which sprang from the compensation hole 9 moves to the head section 14a along with the tilting section 14b of the bottom wall 14, the generated foam moves to the head section 14a. It is promptly discharged to the oil tank 13 from the penetrating holes 16 and floats on the oil surface. By using two penetrating holes like this, replacement of foam and operation oil is more smoothly carried and the foam function can be prevented from being lowered.</p> |
