Drum type washer for metal borings and the like

Claim 1

A washer for extremely small materials such as metal borings, cuttings and the like, comprising an elongated cylindrical drum having an inlet end and a discharge end, means mounting said drum for rotation in one direction, a continuous helical vane extending lengthwise of said drum with its convolutions projecting inwardly from the inner cylindrical surface thereof and oriented to convey the materials being cleaned from the inlet end to the discharge end of said drum, said drum having at least one liquid spraying zone followed by a liquid draining zone, spraying means within said drum in said liquid spraying zone, a plurality of spaced apart openings in the cylindrical surface of said drum in the liquid draining zone, said openings extending between adjacent convolutions of said helical vane, each said opening having a leading edge and a trailing edge relative to the direction of rotation of said drum, an inclined baffle overlying each of said openings, each of said baffles having its leading edge secured to said drum along the leading edge of said opening with its trailing edge extending to at least the trailing edge of said opening and lying in spaced relation thereto to define a slot-like outlet port between the trailing edge of said baffle and the trailing edge of the underlying opening, whereby when said drum is rotated, the baffles will deflect the materials being cleaned away from said outlet ports while permitting spraying liquid accumulated on the undermost inner surface of the drum to flow through said outlet ports for discharge.