Abstract: A coolant recycling apparatus having first and second storage tanks mounted on a wheeled cart. The first tank has a suction device associated therewith to which is coupled a flexible suction hose to suck contaminated coolant from the sump of a machine tool, whereby the coolant flows through the suction device and then through a filter for removing larger solids, whereupon the contaminated coolant is then deposited in the first tank. A pump sucks the contaminated coolant from the first tank and supplies it to a filter disposed adjacent the upper end of the second tank. This filter has a stack of oil absorbent pads which remove tramp oil as the coolant flows downwardly and then collects in the second tank. The clean coolant in the second tank is sent back to the pump through suitable valving which enables the coolant to be supplied to a dishcarge hose which feeds the clean coolant back to the sump.

Abstract: A conveyor apparatus for moving materials unidirectionally has an elongated, upwardly facing trough with at least one longitudinally extending semicylindrical recess in the bottom thereof. A helical flight is positioned in each such recess and is rotated about its longitudinal axis so as to move said materials along said trough. At least one rigid, elongated push-bar is supported in the trough for reciprocal lengthwise movement longitudinally of the trough. Each push-bar has a plurality of longitudinally spaced barbs and/or plows mounted thereon and shaped to advance said materials unidirectionally where the push-bar is reciprocated. Material retaining elements may also be provided on the walls of the trough to oppose movement of the said material in the opposite direction.

Abstract: A conveyor apparatus has a pair of inclined, parallel, adjacent upwardly facing semicylindrical troughs, an elongated helical flight rotatably disposed in each trough, and a drive mechanism for effecting rotation of the helical flights. The lower ends of the troughs are received in a tank having spaced side walls and having spaced baffle walls between the side walls which are parallel to the side walls and extend above at least a portion of the top edge of each side wall. These top edge portions of the side walls are each adjustable about an axis normal to the side wall to a substantially horizontal position and are releasably fixable in such position. Solids introduced between the baffle walls are conveyed by the rotating flights to the upper ends of the troughs, and liquid so introduced passes under said baffle walls and over the adjustable edge portions of the side walls.

Abstract: A harpoon or chip conveyor having an arcuate trough fitted with material retaining members or barbs on its inner sides and a plurality of interconnected plows driven in backward and forward or reciprocal motion by a reciprocating hydraulic or air operated power unit. The material retaining members are so oriented that a small vertical portion faces the direction of travel of the material being conveyed. The arcuate trough is generally greater than 90.degree. and less than a complete 360.degree.. An outlet is provided at least at one end of the arcuate trough for discharging the material collected in the trough in response to the reciprocal motion of the plows.

Abstract: An elongated conveyor for effecting unidirectional movementof materials lengthwise thereof, said conveyor having an upwardly opening trough and structure therein for advancing the materials unidirectionally, which advancing structure is reciprocable below the lower wall of the trough for movement lengthwise of the trough. A slot is disposed in the lower wall adjacent the track, and a connector extends from the carriage to the advancing structure. A pressure fluid operated actuator is mounted on the lower wall in alignment with the track for effecting reciprocal movement of the carriage, whereby the material advancing structure is reciprocated within the trough.