| 摘要 |
<p>An apparatus for lifting a load, in particular a cab of a vehicle, comprises double-acting cylinder means (3), provided with piston means (5) connected to said load and defining first chamber means (9) and second chamber means (10) flowingly connected to supply means (11) or with tank means (13) of a fluid respectively by first conduit means (19, 21) and second conduit means (20, 22), control valve means (17) for connecting said supply means (11) of said pressurised fluid selectively to said first chamber means (9) or to said second chamber means (10) respectively for lifting or lowering said load, and sequence valve means (23) mounted on said first conduit means (19, 21) between said control valve means (17) and said double-acting cylinder means (3) and configured so as to enable said fluid to flows towards said control valve means (17) when a fixed pressure of said fluid in said first conduit means (19, 21) is reached.</p> |
