| 摘要 |
<p>A valve provides automatic switchover from a plurality of fluid pressure sources to a common outlet. The valve includes first and second spools respectively in first and second spool chambers, and each spool includes at least one sealing member carried thereon for selective sealing engagement with said first and second spool chambers. Fluid passageways transfer spool controlled fluid pressures between the first and second spool chambers. Each of said first and second spools are resiliently biased towards an open position, and fluid-biased towards a closed position. In an open position, the first and second spools are adapted to deliver pressurized fluid from an associated inlet port to an end chamber of the opposite spool chamber. In a closed position, the first and second spools are adapted via the at least one sealing member to inhibit delivery of pressurized fluid. A manifold assembly provides fluid communication to the common outlet.</p> |
