| 摘要 |
<p>A reciprocating piston engine and a reciprocal type piston pump comprise a metal helical coiled multilayer seal (311) on a piston (310), and further comprise a connecting rod for connecting the piston and a crank shaft, wherein the connecting rod has a first universal joint at one end and a second universal joint at another end, the first and second universal joints respectively connect to the piston and the crank shaft for absorbing the slight misalignment of the connecting rod shank (213). The reciprocating piston engine and the reciprocal type piston pump improve the performance much higher than conventional art but the manufacturing cost is going down much lower than conventional art.</p> |
