US 4,362,618 A · Water filter

Abstract

A water filter includes a main housing defining a primary filter chamber in which is disposed an elongated tubular inner or secondary filter. Media arranged in the direction of flow includes, within the primary filter, layers of relatively coarse and fine flint gravel followed by a substantial layer of packed charcoal. The inner filter includes a substantial layer of packed charcoal and discrete layers of fine and coarse gravel near the outlet of the inner filter. The arrangement of media provides for repeated backflushings without contaminating the primary filter media. The main filter housing includes spaced apart head members which are interconnected by cylindrical tubular liners and an outer tubular shell disposed around the inner liners. The filter inlet and outlet conduits are provided with self-sealing quick disconnect coupler members for coupling the filter to a diverter circuit from the main water line or to a suitable circuit for backflushing operations.

Claims14

Dependent claims

A water filter apparatus comprising:

a first elongated housing forming an interior area defining an inlet chamber and a primary filter chamber;
foraminous wall means disposed in said housing and forming a common wall between said chambers;
an inlet conduit in communication with said inlet chamber;
a second elongated housing disposed within said primary filter chamber, said second housing forming a secondary filter chamber;
an outlet conduit extending from said second housing to the exterior of said first housing, said outlet conduit being in communication with said secondary filter chamber;
a first member forming a screen between said outlet conduit and said secondary filter chamber;
and
a plurality of layers of filter media in said primary and secondary chambers for filtering water flowing through said filter between said conduits.

5 more elements

Dependencies are inferred from the claim text.

Water filter

Life of this patent

Water filter

Life of this patent

Abstract

Claims14