| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an accumulator 1 capable of suppressing early wastage of a packing 20 of a rubber-like elastic material by strong compression to improve sealability of the packing 20, in the accumulator 1 having a sealing function of pressure inside the accumulator 1 when pressure on a piping side decreases. <P>SOLUTION: This accumulator 1 has a seal holder 19 fixed to the inside of an oil port 5, the packing 20 held on the outside of the seal holder 19, and a bellows cap 8 moving when the pressure decreases to tightly contact with the packing 20. When the bellows cap 8 moves in the pressure decrease, the bellow cap 8 abuts on the seal holder 19 to make a gap between two sides 8, 19 zero. An abutment part between the two sides 8, 19 is formed with a communication part 22 communicating the inner and outer circumferences, in a part of circumference, such that the two sides 8, 19 do not abut on each other over the entire circumference. <P>COPYRIGHT: (C)2004,JPO</p> |
