# US 2013/0153604 A1 · Internal valve tip filter

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- Number: US 2013/0153604 A1
- Document ID: US20130153604A1
- Status: Published application
- Kind: A1
- Application number: 13/660,094
- Filed: 2012-10-25
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Graco Minnesota Inc.
- Inventors: Joseph E. Tix; Mark T. Weinberger; Daniel P. Ross; Paul R. Quam; John S. Lihwa
- Web page: https://patentgrep.com/patent/US20130153604A1

## CPC

- B05C 11/1047: {Apparatus or installations for supplying liquid or other fluent material comprising a buffer container or an accumulator between the supply source and the applicator}
- B05B 1/306: {the actuating means being a fluid}
- B05B 15/40: Filters located upstream of the spraying outlets
- B05C 5/0225: {characterised by flow controlling means, e.g. valves, located proximate the outlet (B05C5/0258, B05C5/0275 take precedence; supply valves upstream the coating head B05C11/1036)}
- B05C 5/0279: {independently, e.g. individually, flow controlled}
- B01D 2201/02: Filtering elements having a conical form
- B05C 5/0237: {Fluid actuated valves}
- B05C 11/1042: {provided with means for heating or cooling the liquid or other fluent material in the supplying means upstream of the applying apparatus}
- B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A fluid dispensing valve comprises a module, a discharge orifice, a valve stem and a filter. The module has a fluid inlet, a fluid outlet and a fluid passage connecting the fluid inlet and the fluid outlet. The discharge orifice is in fluid communication with the fluid outlet. The valve stem extends into the fluid passage to close-off the discharger orifice. The filter is disposed within the fluid passage and surrounds the valve stem.

## Claims

### Claim 1

A fluid dispensing valve comprising:
a module having:
a fluid inlet;
a fluid outlet; and
a fluid passage connecting the fluid inlet and the fluid outlet;
a discharge orifice in fluid communication with the fluid outlet;
a valve stem extending into the fluid passage to close-off the discharge orifice; and a filter disposed within the fluid passage and surrounding the valve stem.

### Claim 2 (depends on 1)

The fluid dispensing valve of claim 1 wherein the filter comprises a double-layer of mesh screen.

### Claim 3 (depends on 1)

The fluid dispensing valve of claim 1 wherein the filter includes an annular body having:
an inlet end positioned within the fluid passage upstream of the fluid inlet; and
an outlet end positioned within the fluid passage downstream of the fluid inlet.

### Claim 4 (depends on 3)

The fluid dispensing valve of claim 3 wherein the filter further includes a bushing comprising:
a ring engaged with the fluid passage and having a guide bore for receiving the valve stem, wherein the guide bore is sized to produce a slip fit that provides filtration;
an annular body extending from the ring and over which the annular body of the filter fits;
a plurality of windows in the annular body; and
an open end of the cylindrical body opposite the ring and through which the valve stem extends to engage the discharge orifice.

### Claim 5 (depends on 4)

The fluid dispensing valve of claim 4 wherein the fluid dispensing valve further includes a tip cap comprising:
a collar having:
an outer surface inserted into the fluid outlet; and
an inner surface into which the cylindrical body of the bushing is inserted; and
a tip portion having an interior opening to the inner surface, the tip portion including the discharge orifice.

### Claim 6 (depends on 5)

The fluid dispensing valve of claim 5 and further comprising:
a seal disposed within the fluid passage proximate the ring to seal around a shaft of the valve stem; and
a valve seat disposed within the tip portion and including the discharge orifice to seal against a tip of the valve stem.

### Claim 7 (depends on 1)

The fluid dispensing valve of claim 1 wherein the filter includes an annular body having:
an inlet end opening to the fluid inlet; and
an outlet end facing the discharge orifice.

### Claim 8 (depends on 7)

The fluid dispensing valve of claim 7 wherein the annular body comprises a frusto-conical body having:
a large-diameter end comprising the inlet end; and
a small-diameter end comprising the outlet end.

### Claim 9 (depends on 7)

The fluid dispensing valve of claim 7 wherein the filter further includes:
a bearing connected to the small-diameter end and surrounding the valve stem.

### Claim 10 (depends on 9)

The fluid dispensing valve of claim 9 wherein:
the bearing is sized to produce a slip fit forming a gap around the valve stem; and
the filter has a mesh size that is larger than the gap.

### Claim 11 (depends on 9)

The fluid dispensing valve of claim 9 wherein the bearing includes prongs extending towards the discharge port to engage an edge along the fluid passage.

### Claim 12 (depends on 9)

The fluid dispensing valve of claim 9 wherein the filter further includes:
a seal ring connected to the inlet end and engaged with the passage.

### Claim 13 (depends on 12)

The fluid dispensing valve of claim 12 wherein the bearing and the seal ring are soldered to the filter.

### Claim 14 (depends on 12)

The fluid dispensing valve of claim 12 wherein the seal ring comprises a portion of the filter bent outward to form a flange.

### Claim 15 (depends on 12)

The fluid dispensing valve of claim 12 wherein the filter further includes:
a stabilizing ring surrounding the filter outside of the bearing.

### Claim 16 (depends on 15)

The fluid dispensing valve of claim 15 wherein the seal ring and stabilizing ring are injected molded onto the filter.

### Claim 17 (depends on 15)

The fluid dispensing valve of claim 15 wherein the bearing and the stabilizing ring are force fit together to join to the filter.

### Claim 18 (depends on 12)

The fluid dispensing valve of claim 12 wherein the module comprises:
a valve housing forming a first portion of the fluid passage that intersects the fluid inlet; and
a tip housing forming a second portion of the fluid passage that is joined to the first portion of the fluid passage;
wherein the seal ring is positioned between the first portion and the second portion to filter fluid passing from the first portion to the second portion.

### Claim 19 (depends on 18)

The fluid dispensing valve of claim 18 wherein:
the first portion of the fluid passage has a first diameter;
the second portion of the fluid passage has a second diameter smaller than the first; and
the tip housing includes a collar sized to be received by the first portion, the second portion extending through the collar to join with the first portion.

### Claim 20 (depends on 1)

The fluid dispensing valve of claim 1 wherein a clearance between the filter and the valve stem forms a gap that provides filtration.

### Claim 21

A fluid dispensing valve comprising:
a module body having:
a fluid passage extending along an axis between a sealed first end and an open second end; and
a fluid inlet intersecting the fluid passage between the sealed first end and the open second end;
a tip cap comprising:
a collar extending into the open second end;
a discharge port extending from the collar;
a discharge orifice disposed in the discharge port;
a valve stem comprising:
a shaft extending into the sealed first end and out of the open second end; and
a tip for engaging the discharge orifice; and
an annular filter surrounding the shaft within the fluid passage to intercept fluid flow between the fluid inlet and the discharge orifice.

### Claim 22 (depends on 21)

The fluid dispensing valve of claim 21 wherein the filter comprises:
an annular support body;
a plurality of windows extending through the annular support body; and
an annular filter media body positioned over the plurality of windows.

### Claim 23 (depends on 22)

The fluid dispensing valve of claim 22 wherein the annular support body includes:
a rim extending from the support body to engage the fluid passage;
a plate closing off an end of the support body; and
a valve bore extending through the plate to receive the valve stem.

### Claim 24 (depends on 21)

The fluid dispensing valve of claim 21 wherein the filter comprises:
an annular filter media body;
a seal ring connected to a first end of the annular filter media body to engage the fluid passage; and
a bearing connected to a second end of the annular filter media body to receive the valve stem.

### Claim 25 (depends on 21)

The fluid dispensing valve of claim 21 wherein:
the annular filter media body is conical in shape; and
the bearing includes prongs extending away from the filter media body.

### Claim 26

A hot melt dispensing system comprising:
a container for storing hot melt pellets;
a melter capable of heating hot melt pellets into a liquid adhesive;
a feed system for transporting hot melt pellets from the container to the melt system; and
a dispensing system for administering liquid adhesive from the melt system, the dispensing system comprising:
a manifold that receives liquid adhesive from the melt system; and
a module comprising:
a valve stem; and
a filter surrounding the valve stem within the module.

### Claim 27 (depends on 26)

The het melt dispensing system of claim 26 wherein the module further comprises:
a fluid inlet for receiving liquid adhesive;
a fluid passage through which the valve stem extends; and
a discharge orifice that receives liquid adhesive from the fluid passage and through which the valve stem controls flow;
wherein the filter is positioned in the fluid passage between the fluid inlet and the discharge orifice.

### Claim 28 (depends on 27)

The fluid dispensing valve of claim 27 wherein the filter comprises:
an annular support body;
a plurality of windows extending through the annular support body; and
an annular filter media body positioned over the plurality of windows.

### Claim 29 (depends on 27)

The fluid dispensing valve of claim 27 wherein the filter comprises:
an annular filter media body;
a seal ring connected to a first end of the annular filter media body to engage the fluid passage; and
a bearing connected to a second end of the annular filter media body to receive the valve stem.

### Claim 30

A filter for a dispensing module, the filter comprising:
a seal ring;
a hoop spaced from the seal ring;
a filter media connecting the seal ring and the hoop; and
a valve stem bearing connected to either the seal ring or the hoop to guide a valve stem through the filter.

### Claim 31 (depends on 30)

The filter of claim 30 and further comprising a support body comprising:
a first end connected to the seal ring;
a second end connected to the hoop;
a cover connected to the first end and the seal ring to define the bearing; and
a plurality of windows extending through the support body between the seal ring and the hoop;
wherein the filter media is disposed over the support body across the plurality of windows.

### Claim 32 (depends on 30)

The filter of claim 30 wherein:
the filter media comprises an conical body; and
the valve stem bearing comprises an inner surface of the hoop.

### Claim 33 (depends on 30)

The filter of claim 30 wherein:
the valve stem engages the seal ring or the hoop at slip fit forming a gap; and
the filter media has a mesh size that is larger than the gap.