| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piston that smoothly performs a relative movement of a piston moving part to a piston base part. <P>SOLUTION: The piston 10 includes: the piston base part 20; the piston moving part 30; a storing part 70 formed between the piston base part 20 and the piston moving part 30; a projection part 35 disposed in the piston moving part 30 and projected toward the storing part 70 in a direction parallel to a reciprocating direction A of the piston moving part 30 relative to the piston base part 20; and a fitting part 24 disposed in the piston base part 20 and slidably fitting to the projection part 35 in association with a change in capacity of the storing part 70. <P>COPYRIGHT: (C)2012,JPO&INPIT |
