Abstract: A size-adjustable animal door is provided. The door includes a pair of opposing frame units configured to be secured to opposing sides of a door or other barrier. Each frame unit comprises slidably mating components that permit each frame unit to have (i) an adjustable height, (ii) an adjustable width, or (iii) both The slidably mating components of each frame unit form an opening configured to align with a pre-cut opening in a door, forming a passageway for an animal. The door also includes a flap unit fabricated from a flexible material having a series of cutting guides to facilitate the custom fitting of the flap unit in the door opening. The door also includes a pivoting connection member arranged to connect the flap unit to a horizontal, upper frame member along the first frame unit. The door may also include a panel unit that is gravitationally received in u-channels along one of the frame units to block the flap unit. A method of installing a pet door is also provided.

Abstract: The movable cleaning shoe frame is provided with internal sidewalls. The frame supports a sieve for receiving grain to be cleaned. The sieve is provided with longitudinally extending dividers that define a plurality of longitudinally extending grain flow channels. The sidewalls and the dividers are provided with cleaning shoe spreaders that extend into the longitudinally extending grain flow channels above the sieve. Movement of the cleaning shoe drives the spreaders to flap back and forth. This flapping action of the spreaders distributes the grain to be cleaned transversely across the sieve so that the cleaning assembly operates more efficiently.