| 摘要 |
A system for stabilizing a trailer such as a caravan, when parked, or for raising and lowering a pop-top or a television antenna on a caravan, the system having at least one four water actuated ram, and being operable from water supplied from a water tap 47 (faucet) at a camp ground/caravan park. A valve 19 in the supply line 33 prevents loss of water and hence inadvertent actuation/deactuation of the water actuated rams. A selector valve 21 allows selection between extend and retract operations. In the case of a system for stabilizing a trailer such as a caravan when parked, or for raising and lowering a pop-top on a caravan there are at least two water actuated rams and preferably four water actuated rams 11, 13, 15, 17 connected in parallel.
|
