Patent ID: 8281936

Claim:
A vacuum drum washer comprising: a cylindrical drum including a screen and deck defining an exterior cylindrical surface; a plurality of outer filtrate channels disposed inward of the screen, the outer filtrate channels extending along a longitudinal axis of the drum and substantially an entire length of the drum; an array of filtrate radial drain channels extending radially inward along a first end of the drum from the outer filtrate channels towards a rotational axis of the drum; a filtrate chamber at the first end of the drum and receiving filtrate discharged from the filtrate radial drain channels, and a conical array of radial filtrate drainage conduits coupled to receive filtrate from the filtrate channels, the drainage conduits each having an inlet proximate to the filtrate channels, the inlets are arranged radially around the drum and positioned between a longitudinal center of the drum and a second end of the drum, and the radial drainage conduits direct filtrate to the filtrate chamber.