| 摘要 |
Pump with a self-reversing piston made to move in a reciprocating rectilinear manner by a source of hydraulic energy including a driving piston which moves with at least one driven piston. Each time it reaches the end of a stroke, the driving piston (1) activates followers (9, 9') in order to move a liquid column (10, 10') which causes a pilot slide valve (13) to be reversed; the latter is designed to reverse the main slide valve (15), which causes the driving piston to move in the other direction, thus ensuring automatic inversion by hydraulic means. |
