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(11) | EP 0 305 150 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Mobile concrete mixing apparatus |
(57) The apparatus 1 is mounted on a lorry 3 and comprises a frame 10, and a sand and
aggregate hopper 13, a cement hopper 16 and water storage tanks 19 mounted on the
frame. A mixing drum 45 is provided for mixing quantities of sand and aggregate and
cement supplied from the hoppers 13, 16 with a quantity of water supplied from the
tanks 19 to produce the required mix. The sand and aggregate is supplied to an opening
51 of the drum 45 by a belt conveyor 20 positioned below the hopper 13, and the cement
is supplied to the opening 51 by a screw conveyor 36 by way of a discharge chute 43.
The mix may be held within the drum 45 until required for use and may be discharged
from the opening 51 by tipping the drum 45. |