| 摘要 |
The present invention concerns a spray device for liquid concrete, comprising a rotor 3 which is provided with blades 2 and is able to rotate in a surrounding casing 1. At one end, the casing 1 is connected to a space 4 for the liquid concrete, from which the rotor 3 can take up the latter, and at another end it is provided with an opening 5 through which the rotor 3, for spraying purposes, is intended to eject the concrete which it has taken up. The novel and characteristic feature of the spray device is that the rotor 3 is spherical. <IMAGE> |
