| 摘要 |
PROBLEM TO BE SOLVED: To reduce striking sound resulting from contact between a piston and a cylinder, without increasing time and labor required for assembling the piston into the cylinder.SOLUTION: A reciprocal type air compressor 1 has: cylinders 51a, 51b; pistons 52a, 52b reciprocating in the cylinders 51a, 51b; and rider rings 70a, 70b mounted on the outer peripheral surfaces of the pistons 52a, 52b and reciprocating integrally with the pistons 52a, 52b. The rider rings 70a, 70b are subjected to compression processing in its thickness direction.SELECTED DRAWING: Figure 2 |
