Abstract: A climbing animal barrier for tree trunks, poles, fences and walls is disclosed. A barrier wall consisting of accordion-pleated metal cloth is bounded on its exterior by a solid metal skirt element which the climbing animal cannot grip or penetrate with its claws and thus is effectively prevented from circumventing the barrier. When applied to a tree trunk, the barrier can expand automatically with tree growth. Serious loss of nut crops and the like is prevented.

Abstract: Nuts on the ground are propelled by an air jet issuing from one tubular branch of a hand-held nut harvester into an opposing conveyor branch where the nuts are lifted until they strike a deflector in a separator chamber. Deflected nuts descend from the separator chamber to an attached collection receptacle. Debris entrained with nuts in the conveyor branch of the harvester is subjected to a venturi action produced by convex and concave spoon-like elements in the throat of the separator chamber immediately beyond the nut deflector and is swept through a rear downturned debris conduit or horn. The harvester can clear itself of debris through operation of an air stream diverter valve which diverts most of the harvesting air stream produced by a back-pack blower on a reverse path through the conveyor branch of the harvester.