| 摘要 |
<p>The present invention includes hydraulic systems designed to allow the selection of a source of pressurized hydraulic fluid to lift a load. In one embodiment, a hydraulic system in accordance with the present invention comprises a hydraulic accumulator that may be selected as a source of pressurized hydraulic fluid to lift a load. Such a hydraulic system may or may not be part of a cushion ride system. The present invention also includes methods for selecting a source of pressurized hydraulic fluid to lift a load and earth moving or ground leveling apparatus that allow the selection of a source of pressurized hydraulic fluid to lift a load.</p> |
