| 摘要 |
The present invention relates to a vessel such as a heating oil storage tank 100 having a security device 200 for preventing unauthorized filling or emptying of the vessel. The vessel comprises an aperture for filling or emptying the vessel. There is a cap 130 sized and shaped to cover the aperture and to engage with a part of the vessel through which the aperture extends such that the cap must be moved away from the surface to be removed from the vessel. The security device comprises a barrier 210 coupled to a support 220 to allow movement of the barrier between closed and open positions. In the closed position, the barrier spans at least part of the cap thereby preventing the cap from being removed from the vessel. In the open position, the barrier is clear of the cap to allow its removal. The security device further comprises a locking mechanism arranged to lock the barrier in the closed position. A locking mechanism 250 is arranged to lock the barrier in the closed position. The locking mechanism may be provided by a padlock. |
