Patent ID: 8720378

Claim:
A system for scraping manure from a barn floor having an elongated first slot, the system comprising an elongated conduit in the floor, the conduit having an elongated second slot mating with the first slot, the first and second slots being arranged so manure scraped from the floor by blades on a trolley moving in a direction of the elongated conduit can pass through the slots and move into the conduit; the trolley including (a) a paddle rotatable about a horizontal axis that is transverse to the slots, and (b) a structure carrying the paddle; parts of the trolley, including the paddle, the horizontal axis and the structure being located in the conduit so the paddle can extend from the trolley part in the conduit, the horizontal axis in the conduit, and the structure part in the conduit through the slots so that, as the paddle turns about the horizontal axis, the paddle can urge manure scraped by the blades into the conduit; wherein the trolley carries wheels that are located entirely in the conduit and bear on an interior lower surface of the conduit, the wheels being drivingly connected with the structure carrying the paddles so that as the wheels turn on the lower surface of the conduit the paddle is driven about the horizontal axis.