Mix chamber for a plural component sprayer

Patent metadata

Field	Value
Publication number	US-11896992-B2
Application number	US-202217886667-A
Country	US
Kind code	B2
Filing date	Aug 12, 2022
Priority date	Oct 26, 2018
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A mix chamber for a plural component sprayer is configured to receive first and second component materials and emit a spray of a resulting plural component material. The mix chamber includes a chamber body extending between a first end and a second end and including flat lateral sides. A ramp feature is disposed proximate the first end and is configured to contact and push first and second side seals, respectively, away from a body axis as the mix chamber shifts in a first direction through a cartridge bore to increase a gap between the first side seal and the second side seal such that the first side seal engages the first flat lateral side and the second side seal engages the second flat lateral side.

First claim

The invention claimed is:

1. A mix chamber configured to be disposed in a bore of a plural component spray gun and configured for receiving a first component fluid from a first fluid channel in the plural component spray gun and a second component fluid from a second fluid channel in the plural component spray gun, a first side seal is disposed in the first fluid channel to seal against the mix chamber and a second side seal is disposed in the second fluid channel to seal against the mix chamber, the mix chamber comprising:
a chamber body extending between a first end and a second end and elongate along a body axis, the chamber body including a first flat lateral side and a second flat lateral side, a portion of the first flat lateral side radially aligned with a first location along the body axis such that a first line perpendicular to the body axis extends through the first flat lateral side from the first location, and a portion of the second flat lateral side radially aligned with the first location along the body axis such that a second line perpendicular to the body axis extends through the first flat lateral side from the first location;
a first inlet bore extending into the first flat lateral side and to a mix bore extending to a spray orifice, the first inlet bore configured to receive the first component fluid from the first fluid channel;
a second inlet bore extending into the second flat lateral side and to the mix bore, the second inlet bore configured to receive the second component fluid from the second fluid channel;
a slot extending into at least one of the top side and the bottom side, the slot extending into the body such that a portion of the slot is radially aligned with the first location along the body axis such that a third line perpendicular to the body axis and extending from the first location intersects the slot; and
a head extending from the first end of the chamber body.

2. The mix chamber of claim 1 , wherein a ramp is mounted on the head and is configured to contact and push the first and second side seals, respectively, away from the body axis as the mix chamber shifts in a first direction through the cartridge bore to increase a gap between the first side seal and the second side seal such that the first side seal engages the first flat lateral side and the second side seal engages the second flat lateral side, the ramp formed from a first material and the chamber body formed from a second material, the second material being harder than the first material.

3. The mix chamber of claim 2 , wherein the ramp is formed from a compliant material and the chamber body is formed from a metal.

4. The mix chamber of claim 2 , wherein the ramp has a first width and the first flat lateral side is spaced from the second flat lateral side by a second width different from the first width.

5. The mix chamber of claim 4 , wherein the first width is greater than the second width.

6. The mix chamber of claim 2 , wherein the ramp is removably disposed on the head.

7. A mix chamber assembly comprising:
the mix chamber of claim 1 , further including a tail extending from the second end; and
a chamber connector mounted to the tail, the chamber connector including a mount configured to connect the mix chamber assembly to an actuator of a plural component sprayer.

8. The mix chamber assembly of claim 7 , wherein the mount includes a locking tab projecting from an end of the chamber connector opposite the mix chamber and outward away from the body axis.

9. The mix chamber assembly of claim 7 , wherein the tail extends into the chamber connector.

10. The mix chamber assembly of claim 7 , wherein the tail includes a pin bore and the chamber connector includes an opening aligned with the pin bore.

11. A plural component sprayer comprising:
a first fluid channel through the plural component sprayer extending to a gun bore;
a second fluid channel through the plural component sprayer extending to the gun bore;
a first side seal at least partially disposed in the first fluid channel;
a second side seal at least partially disposed in the second fluid channel; and
the mix chamber of claim 1 .

12. The mix chamber of claim 1 , wherein the slot extends through the first end and the second end.

13. The mix chamber of claim 1 , wherein the slot extends partway along a length of the chamber body such that the slot includes one open end and one closed end.

14. The mix chamber of claim 1 , wherein the first inlet bore is disposed outward of the body axis and aligned with the first location along the body axis.

15. The mix chamber of claim 14 , wherein the second inlet bore is disposed outward of the body axis and aligned with the first location along the body axis.

16. The mix chamber of claim 1 , wherein the head includes threading on an exterior of the head.

Assignees

• Graco Minnesota Inc

Inventors

• Ross Daniel P
• Tix Joseph E
• Stewart Samuel R
• Weinberger Mark T
• Pellin Christopher J
• Velgersdyk Jeffrey N
• Bosak Jack A
• Whiteoak Jacob R

Classifications

• B05B7/0408 Primary

  with arrangements for mixing two or more liquids · CPC title

• B05B7/04

  with arrangements for mixing liquids or other fluent materials before discharge (mixing in general B01F, e.g. B01F25/00; mixing valves F16K11/00) · CPC title

• B05B7/08

  with separate outlet orifices, e.g. to form parallel jets {, i.e. the axis of the jets being parallel}, to form intersecting jets {, i.e. the axis of the jets converging but not necessarily intersecting at a point} · CPC title

• B05B7/1254

  the controlling means being fluid actuated · CPC title

• B05B7/2497 Primary

  several liquids from different sources being supplied to the discharge device · CPC title