Storage apparatus
A storage apparatus has an annular array of stacked item storage formations, and an epicyclic selector arrangement for extracting items from the array, with a temporary storage unit.
1. A storage apparatus comprising:
an array of item storage formations,
a first member rotatable with respect to the array about a first axis,
a selector mounted on the first member, the selector being rotatable with respect to the first member about a second axis which is parallel to and offset from the first axis, the second axis being defined as fixed in relation to the first member and being rotatable about the first axis by rotation of the first member about the axis, the selector comprising an item transfer conduit offset from the second axis, and
a source of differential pressure in fluid communication with the item transfer conduit to selectively propel items into an item receiving formation from the array by the creation of a fluid pressure differential,
in which the first member and the selector are configured for rotation about the first and second axes respectively to selectively align the item transfer conduit with one of the array of item storage formations to extract the item from the array.
2. A storage apparatus according to claim 1 , comprising:
a temporary storage unit mounted proximate the selector, the temporary storage unit defining a plurality of chambers for temporary storage of items.
3. A storage apparatus according to claim 2 , in which the temporary storage unit is in communication with the transfer conduit and is positioned on the opposite side of the selector to the item storage formations.
4. A storage apparatus according to claim 3 , in which the temporary storage unit is movably mounted relative to the selector to place the transfer conduit in communication with an individual one of the plurality of chambers.
5. A storage apparatus according to claim 4 , in which the temporary storage unit is mounted for concentric rotation with the selector, and in which each of the plurality of chambers is disposed at the same distance from the second axis as the transfer conduit.
6. A storage apparatus according to claim 5 , in which the chambers in the temporary storage unit are closed at one end by the selector when not in communication with the transfer conduit.
7. A storage apparatus according to claim 1 , in which the source of differential pressure is provided on the other side of the temporary storage unit to the selector such that the source of differential pressure selectively sucks items through the transfer conduit into the chamber in fluid communication with the transfer conduit.
8. A storage apparatus according to claim 7 , in which the selector comprises a seal at an orifice of the transfer conduit, which seal bears against the array of item storage formations.
9. A storage apparatus according to claim 8 , in which the seal comprises an annular member rotatably mounted within the inlet.
10. A storage apparatus according to claim 9 , in which the inlet seal comprises a part spherical surface engaging the inlet.
11. A storage apparatus according to claim 2 , comprising an insulation layer, and the temporary storage unit is positioned on the array side of the insulation layer.
12. A storage apparatus according to claim 11 , in which the first member comprises a first region of the insulation layer, and the temporary storage unit comprises a second region of the insulation layer, which first and second parts are adjacent to form a substantially contiguous insulation layer.
13. A storage apparatus according to claim 2 , comprising an insulation layer, and the temporary storage unit is positioned on the side of the insulation layer opposite to the array.
14. A storage apparatus according to claim 13 , in which the first member comprises a first region of the insulation layer, and the selector comprises a second region of the insulation layer, which first and second parts are adjacent to form a substantially contiguous insulation layer.
15. A storage apparatus according to claim 1 , in which the array comprises a plurality of elongate conduits parallel to the first and second axes, the selector being configured to selectively place each of the elongate conduits in communication with the item receiving formation.
16. A storage apparatus according to claim 15 , in which the plurality of elongate conduits are provided within pipes.