| 摘要 |
Hydraulic pump with pistons given a reciprocating to-and-fro movement by bearing, by means of a pad, against a cam borne by a drive shaft, characterised by the fact that a device forming a non-return feed valve is built into each piston (14), whereas the delivery pressure is permanently reinjected inside the pad (17) via which the said pad (17) bears on the said cam (6). <IMAGE>
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