# US 2014/0150821 A1 · Valve Box Stack Cleaner

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- Number: US 2014/0150821 A1
- Document ID: US20140150821A1
- Status: Published application
- Kind: A1
- Application number: 13/692,001
- Filed: 2012-12-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Inventors: John Armour
- Web page: https://patentgrep.com/patent/US20140150821A1

## CPC

- B08B 9/0436: {provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets (B08B9/045, B08B9/047 take precedence)}
- B08B 9/045: the cleaning devices being rotated while moved {, e.g. flexible rotating shaft or "snake"}(B08B9/047 takes precedence)
- B08B 9/0808: {by methods involving the use of tools, e.g. by brushes, scrapers}
- B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL

## Abstract

A method for cleaning a stack may include the steps of opening a cover of the stack, placing a cleaning tool within the stack to engage the debris within the stack, removing the debris above a valve with the cleaning tool and removing the cleaning tool from the stack. The cleaning tool may include a first cleaning blade, and the cleaning tool may include a second cleaning blade. The first cleaning blade may be a spiral discontinuous blade and a second cleaning blade may be a spiral discontinuous blade. The first cleaning blade may include a first radial cutting edge, and the first cleaning blade may include a first radial cutting edge. The first cutting blade may include a first axial cutting edge, and the second cutting blade may include a second axial cutting edge.

## Claims

### Claim 1

1) A method for cleaning a stack, comprising the steps of:
opening a cover of the stack;
placing a cleaning tool within the stack to engage debris within the stack;
removing the debris above a valve in the stack with the cleaning tool;
removing the cleaning tool from the stack:
wherein the cleaning tool includes a first cleaning blade;
wherein the first cleaning blade includes a first radial cutting edge;
wherein the first cleaning blade includes a magnet to attract metal debris from the stack.

### Claim 2

2) (canceled)

### Claim 3 (depends on 1)

3) A method for cleaning a stack as in claim 1, wherein the cleaning tool includes a second cleaning blade.

### Claim 4

4) (canceled)

### Claim 5 (depends on 3)

5) A method for cleaning a stack as in claim 3, wherein the second cleaning blade includes a second radial cutting edge.

### Claim 6 (depends on 3)

6) A method for cleaning a stack as in claim 3, wherein the second cleaning blade is a spiral continuous blade.

### Claim 7 (depends on 1)

7) A method for cleaning a stack as in claim 1, wherein the first cleaning blade includes a continuous blade.