| 摘要 |
<p>A hydraulic piston pump (100, 300, 400) comprises a hollow body (105) internally of which are afforded: an aspirating conduit (110), a delivery conduit (115), and at least a pumping chamber (120) housing an alternating piston (195), in which the pumping chamber (120) is separated from the aspirating conduit (110) and the delivery conduit (115) respectively by an aspirating valve (140) and by a delivery valve (145), the hollow body (105) exhibiting at least a gap (165, 125) establishing communication between the pumping chamber (120) and an exterior environment, the communication being obstructed by a closing element (175, 340, 440) fixed to the hollow body (105). Inside the gap (165, 125) a sealingly inserted separating element (180, 310, 410) separates the pumping chamber (120) from the closing element (175, 340, 440), such that a gap (185, 360, 450) is defined between the closing element (175, 340, 440) and the separating element (180, 310, 410), which gap (185, 360, 450) is in hydraulic communication with the delivery conduit (115) through a channel (190, 365, 455) formed in the hollow body (105).</p> |
