In-line basket filter for a spray spout assembly

Details In-line basket filter for a spray spout assembly In-line basket filter for a spray spout assembly

2001-03-13

2003-04-15

Savage, Matthew O. (Department: 1723)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S497300, C210S498000, C210S136000, C210S432000, C210S452000

Reexamination Certificate

active

06547966

ABSTRACT:

TECHNICAL FIELD
The field of this invention relates to an inline filter and an anti-siphon assembly for a hand held spray spout for a faucet or showerhead.
BACKGROUND OF THE DISCLOSURE
Hand held spray spouts for kitchen faucets are becoming popular. The spray spout can either be mounted in a faucet base and used as a conventional faucet or held in a hand to easily change the direction and placement of the discharged water. Secondly, an operator may easily select to have the discharged water flow as an aerated stream or a spray. The selection is made with the mere touch of an operating button.
In order for the spray portion of the faucet to be maintained in good working order it is desirable to keep the water stream free from any particulates that may large enough to lodge into or entirely block any of the small apertures that form the water spray.
Secondly, anti-siphon valves have long been associated with plumbing fixtures to prevent back flow conditions if per chance the water supply pressure becomes negative while the hand held spray spout is simultaneously submerged in a basin of water with the mixing valve in the on position.
What is needed is a filter that strains large particulates from the water entering the spray spout of the faucet while being conveniently mounted in the spray head. What is also needed is a filter that can also seat the anti-siphon valve and render it additional support against collapse. What is also needed is a filter and anti-siphon assembly that puts a pre-load on the anti-siphon valve base to also provide additional support against collapse.
SUMMARY OF THE DISCLOSURE
In accordance with one aspect of the invention, a hand-held faucet spray spout includes a water passage extending from a base section to a downstream end that has a plurality of apertures letting water spray therethrough. A filter is operably mounted in said water passage for filtering particulates from water before it passes to the plurality of apertures.
The filter has a basket section with a tapered side with filtering ports therethrough. Preferably, a plurality of the filtering ports are on the tapered side of said basket section and are in the form of elongated slots that axially extend along the tapered side. Filtering ports also on the upstream end of the basket.
An anti-siphon valve is mounted downstream from the filter. The filter has a seat section for seating the anti-siphon valve downstream from the filter. Preferably, the seat section has a plurality of circumferentially spaced protrusions extending downstream from the basket section and into the anti-siphon valve for supporting said anti-siphon valve against collapse when a reverse water pressure is in said water passage. The spaced protrusions are radially inner extensions of axially extending ribs that are formed between the slots on the tapered side of the basket section.
It is also desirable that the basket section has a plurality of circumferentially spaced prongs extending upstream for abutting against a supply hose for applying a pre-load pressure onto said filter and said anti-siphon valve. The prongs are radially outer extensions of the ribs that are formed between the slots on the tapered side of the basket section.
In accordance with another aspect of the invention, a filter component for a water hand held spray spout has the above described properties and construction.


REFERENCES:
patent: 4646779 (1987-03-01), Johnson
patent: 4657185 (1987-04-01), Rundzaitis
patent: 4839038 (1989-06-01), McLain, II
patent: 5354468 (1994-10-01), Richards
patent: 5545318 (1996-08-01), Richmond
patent: 5699832 (1997-12-01), Burchard et al.
patent: 5865378 (1999-02-01), Hollinshead et al.

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