公开(公告)号：US3481479A

公开(公告)日：1969-12-02

申请号：US3481479D

申请日：1967-06-16

Applicant: BOWSER INC

Inventor： HOSKINS EDWARD H ,  TERHUNE RALPH D

IPC: B01D29/39 ,  B01D35/22 ,  B01D29/02 ,  B01D29/04

CPC classification number: B01D29/39 ,  B01D29/605 ,  B01D29/66 ,  B01D29/70 ,  B01D29/902 ,  B01D29/96 ,  B01D2201/48

Abstract: 1,227,628. Filter. BOWSER Inc. 25 April, 1968 [16 June. 1967], No. 19544/68. Heading B1D. A filter for swimming pool water comprises an array of elements 12 in common housing (Fig. 1, not shown), each comprising a porous, flat, hollow base of sintered polyethylene, enclosed by a bag of woven polyethylene of smaller porosity. The base is made of two identical sheets welded to porous edge strips or having integral edge flanges which are welded together (Figs. 2b, 2c, not shown). Porous spacers 48 brace the sheets apart and may be formed separately and fastened to the sheets or formed integrally therewith. Bag 55 has a hole to accommodate filtrate outlet 40, and its open end is secured by ties 56 and clamps 57 to the base. Outlet 40 is secured to manifold (44) by a screw joint. The housing has a lower inlet (20), an inlet dam (30), over which incoming water flows, and an overflow (27), leading to drain, to limit the water level therein. Outlet manifold (44) is connected to a filtrate suction pump, which may be reversed to clean the elements (Fig. 4, not shown), inlet (20) being closed and drain outlet (23) opened. Or the elements are washed down using a hose pipe on their exteriors. Filter aid may be used. The housing may be fibreglass-reinforced plastics.