公开(公告)号：US4776962A

公开(公告)日：1988-10-11

申请号：US80773

申请日：1987-08-03

Applicant: Richard J. Wakeman

Inventor： Richard J. Wakeman

IPC: B01D24/02 ,  B01D24/00 ,  B01D24/04 ,  B01D29/46 ,  B01D29/62 ,  B01D29/66 ,  B01D35/06 ,  B01D25/06 ,  B01D29/38

CPC classification number: B01D24/04 ,  B01D2201/186

Abstract: A filtering method and apparatus including a chamber having an inlet and an outlet and a mass of fibers interposed between the inlet and outlet and contained between a perforated base and piston. Structure is provided for reciprocating the piston relative to the base during backwash operation.