Abstract: A nut harvester includes a frame drawn by a tractor over nut and debris windrows on the ground of a nut orchard. The nut harvester collects the nuts from the windrows and separates the debris collected therewith while minimizing the dust emissions and airborne pollutants generated by the nut harvester. The nut harvester includes three primary sections: a pick-up section, a stationary grid section, and a conveyor/fan section. The pick-up section includes finger assemblies which engage the ground to propel the nuts and debris forwardly and upwardly into a rotating feed reel which in turn deposits the nuts onto a stationary grid. The stationary grid includes a number of parallel bars which are spaced to prevent the nuts from falling therebetween. Wipers extend transversely across the grid and advance the nuts therealong.

Abstract: Heat exchange apparatus including a tube having inward projections or turbulating structure extending into the tube at substantially all angular locations around the diameter of the tube except along a drainage path extending along the entire bottom inner surface of the tube. The width of the drainage path is sufficient to ensure that fluid may fully drain from the tube. No turbulating structure is positioned within the drainage path so as to prevent fluid from draining from the tube and potentially contaminating the tube. The turbulating structure of the invention are dimples which are deformed into the tube and have smoothly sloping side walls which further inhibit the dimples from preventing full drainage of the tube. The tubes are fixed to the apparatus at an angle which provides a drainage slope.