Abstract: A method and apparatus are disclosed for delivering particulate material while minimizing the release of dust. The apparatus comprises a vertical conduit, and movable flap adapted to close the lower end of the conduit and a counterwieght or linear actuator for moving the flap to close the conduit whenever the quantity of material within the conduit drops to be predetermined level. The device operates so that a column of solid particulate material is maintained in the lower end of the tube at all times to prevent escape of dust.

Abstract: A hog feeder is disclosed including an annular trough having an upstanding center member with a horizontal top surface. A vertical post extends upwardly and rotatably supports a tapered hopper having a discharge opening located above the plateau. A plurality of radial arms carried by a polygonal plate rotate between the plateau and hopper, the arms including outer ends engageable by hogs' snouts. A removable link interconnects these arms to the hopper. The hopper is vertically adjustable to control the feed rate. A watering system is also disclosed.