Spray tip

Patent metadata

Field	Value
Publication number	US-10799894-B2
Application number	US-201715855474-A
Country	US
Kind code	B2
Filing date	Dec 27, 2017
Priority date	Dec 28, 2016
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A spray tip includes a body portion with an aperture extending through the body portion from an aperture inlet to an aperture outlet, and a handle portion attached to the body portion. The handle portion is configured to rotate the body portion. A retainer with an upstream end and a downstream end is positioned in the aperture of the body portion. A pre-orifice piece with an upstream end and a downstream end is positioned in the aperture of the body portion. A tip piece with an upstream end and a downstream end is positioned in the aperture of the body portion. The downstream end comprises an outlet nozzle.

First claim

The invention claimed is:

1. A spray tip comprising:
a body portion with an aperture extending through the body portion from an aperture inlet to an aperture outlet;
a handle portion attached to the body portion, the handle portion configured to rotate the body portion;
a retainer comprised of a first material with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the retainer includes a retainer passage extending from the upstream end to the downstream end of the retainer
a pre-orifice piece comprised of a second material with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the pre-orifice piece includes a pre-orifice piece passage extending from the upstream end to the downstream end of the pre-orifice piece, wherein the pre-orifice piece passage being defined by an at least partially cylindrical recess on the upstream end, an expansion chamber portion on the downstream end, and a pre-orifice located downstream of the at least partially cylindrical recess and upstream of the expansion chamber portion, and wherein the pre-orifice is a narrowest portion of the pre-orifice piece passage, and wherein the at least partially cylindrical recess includes a cylindrical portion extending into the pre-orifice piece from the upstream end; and
a tip piece with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the tip piece includes a tip piece passage extending form the upstream end to the downstream end of the tip piece, and wherein the downstream end comprises an outlet nozzle;
wherein the retainer passage is aligned with the at least partially cylindrical recess of the pre-orifice piece.

2. The spray tip of claim 1 , wherein the upstream end of the retainer is aligned with the aperture inlet, wherein the upstream end of the pre-orifice piece is adjacent to the downstream end of the retainer, wherein the upstream end of the tip piece is adjacent to the downstream end of the pre-orifice piece, and the downstream end of the tip piece is aligned with the aperture outlet.

3. The spray tip of claim 1 , wherein the retainer passage comprises:
a first tapered portion with an upstream end aligned with the upstream end of the retainer; and
a channel with an upstream end adjacent to a downstream end of the first tapered portion and a downstream end aligned with the downstream end of the retainer.

4. The spray tip of claim 1 , wherein a diameter of the retainer passage is the same as a diameter of the cylindrical portion of the at least partially cylindrical recess of the pre-orifice piece.

5. The spray tip of claim 3 , wherein the expansion chamber portion in the pre-orifice piece passage of the pre-orifice piece comprises:
a second tapered section with an upstream end adjacent to a downstream end of the pre-orifice; and
an expansion channel with an upstream end adjacent to a downstream end of the second tapered section and a downstream end aligned with the downstream end of the pre-orifice piece.

6. The spray tip of claim 5 , wherein the tip piece passage comprises:
an expansion chamber portion on the upstream end of the tip piece passage;
wherein the expansion chamber portion of the pre-orifice piece passage and the expansion chamber portion of the tip piece passage form an expansion chamber between the pre-orifice piece and the tip piece.

7. The spray tip of claim 6 , wherein the expansion chamber portion of the tip piece passage includes a third tapered portion with an upstream end aligned with the upstream end of the tip piece, and wherein the tip piece passage further comprises:
a stepped channel with an upstream end adjacent to a downstream end of the third tapered portion; and
an outlet portion with an upstream end adjacent to a downstream end of the stepped channel and a downstream end aligned with the downstream end of the tip piece.

8. The spray tip of claim 1 , wherein the at least partially cylindrical recess has rounded corners at a downstream end of the at least partially cylindrical recess and formed at an intersection between the cylindrical portion and a wall narrowing to the pre-orifice.

9. The spray tip of claim 1 , wherein the retainer is made out of stainless steel and the pre-orifice piece and the tip piece are made out of tungsten carbide.

10. The spray tip of claim 1 , wherein the first material and the second material are different materials.

11. A spray tip comprising:
a body portion with an aperture extending through the body portion from an aperture inlet to an aperture outlet;
a handle portion attached to the body portion, the handle portion configured to rotate the body portion;
a retainer comprised of a first material with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the retainer includes a retainer passage extending from the upstream end to the downstream end of the retainer;
a pre-orifice piece comprised of a second material with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the pre-orifice piece includes a pre-orifice piece passage extending from the upstream end to the downstream end of the pre-orifice piece, wherein the pre-orifice piece passage includes an at least partially cylindrical recess with an upstream end aligned with the upstream end of the pre-orifice piece and a downstream end aligned with the upstream end of the pre-orifice piece passage, and wherein the pre-orifice piece passage further includes an expansion chamber portion with a downstream end aligned with the downstream end of the pre-orifice piece; and
a tip piece with an upstream end and a downstream end positioned in the aperture of the body portion, wherein the tip piece includes a tip piece passage extending from the upstream end to the downstream end of the tip piece, wherein the downstream end comprises an outlet nozzle, and wherein the tip piece passage includes an expansion chamber portion with an upstream end aligned with the upstream end of the tip piece;
wherein the diameter of the expansion chamber portion of the pre-orifice piece passage at the downstream end is larger than the diameter of the expansion chamber portion of the tip piece passage at the upstream end;
wherein the at least partially cylindrical recess includes a cylindrical portion extending into the pre-orifice piece from the upstream end of the pre-orifice piece; and
wherein the retainer passage is disposed adjacent to and has the same diameter as the cylindrical portion of the at least partially cylindrical recess.

12. The spray tip of claim 11 , wherein the upstream end of the retainer is aligned with the aperture inlet, wherein the upstream end of the pre-orifice piece is adjacent to the downstream end of the retainer, wherein the upstream end of the tip piece is adjacent to the downstream end of the pre-orifice piece, and the downstream end of the tip piece is aligned with the aperture outlet.

13. The spray tip of claim 11 , wherein the upstream end of the tip piece creates a wall between the expansion chamber portion of the pre-orifice piece passage and the expansion chamber portion of the tip piece passage.

14. The spray tip of claim 13 , wherein the wall is flat and orthogonal to a flow path through the expansion chamber portion of the pre-orifice piece passage and the expansion chamber portion of the tip piece passage to impart turbulence to the fluid flowing through the spray tip.

15. The spray tip of claim 11 , wherein the expansion chamber portion in the pre-orifice piece passage of the pre-orifice piec

Assignees

• Graco Minnesota Inc

Inventors

• Kinne Robert W
• Muetzel Pamela J

Classifications

• B05B11/1042

  Components or details · CPC title

• B05B11/10 Primary

  Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle · CPC title

• B05B9/0861 Primary

  the motor being electric · CPC title

• B05B1/341

  before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet · CPC title

• B05B1/02

  designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, {or having an outlet of particular shape}(B05B1/26, B05B1/28, B05B1/34 take precedence) · CPC title