US 6,027,644 A · Dripless purification manifold and cartridge

Abstract

A cartridge based water purification and filtration system which permits cartridge changes without drainage at the input and output ports. Interlocking flanges at the manifold and cartridge lock the cartridge to the manifold and raised surfaces at the cartridge operate the inlet valve with a rotational seating of the cartridge. A spring biased inlet valve depends from a supply manifold input port and cooperates with the filter cartridge to prevent forward flow until the cartridge is seated to the manifold. The check valve includes a split stem which prevents chatter with valve operation. A check valve at the output port cooperates with a sealed bayonet fitting that mates to a concentric outlet port at the cartridge to prevent back flow with cartridge removal. The cartridge also comprises an inlet/outlet means being a two-stage recess wherein a first cylindrical stage presents a first mating surface for mating with the manifold and a second substantially cylindrical stage presenting a second mating surface for mating with the manifold. Both the first and second mating surfaces are substantially continuous and free of interruption by fluid seals.

Claims9

Dependent claims

A filter cartridge for use with a filter apparatus manifold having a flow inlet and a flow outlet, the filter apparatus manifold and the filter cartridge comprising a filter apparatus when the filter cartridge is brought into operable engagement with the filter apparatus manifold, comprising:

a housing having a filter cavity defined by a cavity wall;
filter means for filtering contaminants from a flow of liquid being disposed within the filter cavity, having a hollow flow core and being spaced apart from the cavity wall to define an inlet flow channel between the filter means and the cavity wall;
inlet/outlet means being a two stage recess, the recess having a first cylindrical stage and further having a second substantially cylindrical stage being concentric with the first cylindrical stage channel and the second cylindrical stage being in flow communication with the hollow flow core of the filter means, the first cylindrical stage presenting a first mating surface for mating with the filter apparatus manifold and the second substantially cylindrical stage presenting a second mating surface for mating with the filter apparatus manifold, the first and second mating surfaces being substantially continuous and free of interruption by fluid seals;
and
at least a pair of shoulder flanges being disposed proximate the inlet/outlet means and being matable in an interlocking engagement wit a corresponding pair of manifold flanges rotation of the shoulder flanges with respect to the manifold flanges acting to lockingly engage the filter cartridge and the filter apparatus manifold.

2 more elements

a housing having a filter cavity defined by a cavity wall;
filter means for filtering contaminants from a flow of liquid being disposed within the filter cavity, having a hollow flow core and being spaced apart from the cavity wall to define an inlet flow channel between the filter means and the cavity wall;
and
inlet/outlet means being a two stage recess, the recess having a first cylindrical stage having a first stage diameter and having a first end and an opposed second end, an opening being defined at a first end thereof, the recess further having a second substantially cylindrical stage being concentric with the first cylindrical stage and having a second stage diameter and having a first end and an opposed second end, the second stage diameter being less than the first stage diameter and having a first end operably coupled to the second end of the first cylindrical stage by a connecting wall and having an opening being defined at the second end thereof, the first cylindrical stage being in flow communication with the flow channel by at least one inlet port being defined between said first cylindrical stage and said flow channel and the second cylindrical stage being in flow communication with the hollow flow core of the filter means, at least two shoulder flanges being radially disposed with respect to the inlet/outlet means, the shoulder flanges having a tapered leading edge, the first cylindrical stage presenting a first mating surface for mating with the filter apparatus manifold and the second substantially cylindrical stage presenting a second mating surface for mating with the filter apparatus manifold, the first and second mating surfaces being substantially continuous and free of interruption by fluid seals.

1 more element

Dependencies are inferred from the claim text.

Dripless purification manifold and cartridge

Life of this patent

Dripless purification manifold and cartridge

Life of this patent

Abstract

Claims9