Patent ID: 8276600

Claim:
A machine for scraping away, without interruption, material deposited on a bottom of a gallery, wherein the machine comprises: a first movable body suitable for moving over a bottom portion of a wall of the gallery, said first movable body presenting a front and a rear and including a first movement device for enabling said first movable body to move on the bottom portion of the wall of the gallery; a scraper for detaching material from the bottom of the gallery and mounted at the front of said first movable body; a first storage as a buffer storage mounted on said first movable body; a first transfer device for continuously transferring detached material into said buffer storage; and a second transfer device mounted on said buffer storage for transferring material stored in said buffer storage device to the outside of said first movable body; wherein the machine further comprises a second movable body distinct from the first movable body, suitable for moving along the bottom portion of the wall of the gallery either in convoy with the first movable body or independently and away from said first movable body, and including a second movement device for enabling said second movable body to move on the bottom portion of the wall of the gallery; and a second storage mounted on said second movable body to collect the material transferred to the outside of the first movable body by the second transfer device, and wherein the buffer storage is suitable, when supplied with material by the first transfer device, for storing said material when the second movable body is away from the first movable body and transferring material into the second storage via the second transfer device when the second movable body moves in convoy with the first movable body.