Mix chamber for a plural component sprayer

Patent metadata

Field	Value
Publication number	US-11413635-B2
Application number	US-201916664073-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Oct 26, 2018
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

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 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; and
a first ramp formed on the chamber body between the first flat lateral side and the first end and a second ramp formed on the chamber body between the second flat lateral side and the first end, the first ramp and the second ramp 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 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; and
a head extending from the first end, wherein the mix bore extends through the head and the spray orifice is disposed at an end of the head opposite the first end.

2. The mix chamber of claim 1 , wherein the first ramp and the second ramp are integrally formed on the mix chamber.

3. The mix chamber of claim 2 , wherein the mix chamber is formed from hardened steel.

4. The mix chamber of claim 1 , wherein:
the first flat lateral side has a first height;
the first ramp has a second height; and
the second height is less than the first height.

5. The mix chamber of claim 1 , wherein the head includes exterior threading.

6. The mix chamber of claim 1 , further comprising:
a top side extending between the first flat lateral side and the second flat lateral side; and
a bottom side extending between the first flat lateral side and the second flat lateral side;
wherein at least one of the top side and the bottom side is curved.

7. The mix chamber of claim 6 , further comprising:
a keying feature formed on at least one of the top side and the bottom side.

8. The mix chamber of claim 7 , wherein at least one of the top side and the bottom side is flat such that the mix chamber includes at least three flat sides elongate along the body axis.

9. The mix chamber of claim 7 , wherein the keying feature includes a slot extending into at least one of the top side and the bottom side.

10. The mix chamber of claim 9 , wherein the slot extends from the first end to the second end.

11. The mix chamber of claim 10 , wherein the slot is formed in the chamber body and in a head extending from the first end of the chamber body.

12. A mix chamber assembly comprising:
the mix chamber of claim 1 , further including a tail extending from the second end; and
a cartridge connector mounted to the tail, the cartridge connector including a mounting feature configured to connect the mix chamber assembly to an actuator of a plural component sprayer;
wherein the mounting feature includes a locking tab projecting radially from an end of the cartridge connector opposite the mix chamber.

13. 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, a second flat lateral side, a top side extending between the first flat lateral side and the second flat lateral side, and a bottom side extending between the first flat lateral side and the second flat lateral side;
a slot extending into at least one of the top side and the bottom side, wherein the slot is axially elongate relative to the body axis;
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; and
a first ramp disposed between the first lateral side and the first end and a second ramp disposed between the second lateral side and the first end, the first ramp and the second ramp 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.

14. The mix chamber of claim 13 , wherein the slot extends between the first end and the second end.

15. 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, a second flat lateral side, a top side extending between the first flat lateral side and the second flat lateral side, and a bottom side extending between the first flat lateral side and the second flat lateral side;
a slot extending into at least one of the top side and the bottom side, wherein the slot extends from the first end to the second end;
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; and
a first ramp disposed between the first lateral side and the first end and a second ramp disposed between the second lateral side and the first end, the first ramp and the second ramp 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

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

• B05B7/2497 Primary

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

• B05B7/1254

  the controlling means being fluid actuated · 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

• B05B7/04

  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