Abstract: An evaporator having defrosting capabilities for space-saving and hard-to-reach installations and for connecting to a condensing unit with a condensing coil and a compressor. The evaporator includes a center tube, a middle tube, and an outer tube. The center tube has a refrigerant inlet for supplying a refrigerant before being evaporated, and conducting the refrigerant in a first direction opposite to the refrigerant inlet of the center tube. The middle tube concentrically receives the center tube and defines a first passage therebetween for conducting a hot injected gas for performing a mild, but positive, defrost of the evaporator as the evaporator continues to operate.

Abstract: An evaporator unit for an ice making machine is formed of two vertical series of semi-cylindrical ice-forming molds joined tangentially back-to-back creating a cascade of fluid conduits between them through which refrigerant is passed. Water flows from a weir down over the exposed surfaces of the ice-forming molds until they become filled with ice whereupon hot gas is momentarily passed through the fluid conduits to release an assembly of ice pieces from the evaporator unit. Thereafter, the ice making cycle is repeated by continuing the water and refrigerant flow to produce another assembly of ice pieces.

Abstract: A door latch including a two part keeper element and a latch element. Each part of the keeper element is L-shaped. The longer legs of each part are secured to the edge of a door and door frame, respectively, in back to back relation so that when the door is closed, the shorter legs of each part are in abutment in a vertical plane parallel to but spaced from the door. The latch element includes a hollow sleeve slid over the keeper element parts to retain them together precluding the door from being opened unless the sleeve is removed.