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US 8,893,930 B2Granted
Internal valve tip filter
AssigneeGraco Minnesota Inc.
InventorsJoseph E. Tix, Mark T. Weinberger, Daniel P. Ross, Paul R. Quam, John S. Lihwa
Life of this patent
Estimating the term…
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.
Claims21
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;
- wherein the filter includes an annular body having:
- an inlet end opening to the fluid inlet;
- an outlet end facing the discharge orifice;
- and
- 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.
14 more elements
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, 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.
15 more elements
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, 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.
12 more elements
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;
- a valve stem bearing connected to either the seal ring or the hoop to guide a valve stem through the filter;
- and
- 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 valve stem 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.
9 more elements
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;
- wherein the filter media comprises an conical body;
- and
- wherein the valve stem bearing comprises an inner surface of the hoop.
5 more elements
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;
- wherein the valve stem engages the seal ring or the hoop at slip fit forming a gap;
- and
- wherein the filter media has a mesh size that is larger than the gap.
5 more elements
Dependencies are inferred from the claim text.