| 摘要 |
<p>A fluid device (pump or motor) comprises a case (111) having a closed chamber (114), a rotating element (116) mounted for rotation within the closed chamber, a reciprocating piston (123) drivingly connected to the rotating element such that rotation of the rotating element corresponds to reciprocating movement of the piston, passages for admitting and discharging fluid to and from a cylinder in which the piston reciprocates, and scavenger pump means (170) drivingly connected to the rotating element and operable to pump fluid out of the closed chamber at a rate greater than the rate at which fluid leaks or otherwise is metered into the interior chamber, thereby to maintain the level of fluid within the closed chamber below a predetermined level.</p> |
