# US 2022/0055096 A1 · Pour Cup with Filter Lock

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- Number: US 2022/0055096 A1
- Document ID: US20220055096A1
- Status: Published application
- Kind: A1
- Application number: 17/403,332
- Filed: 2021-08-16
- Published: 2022-02-24
- Earliest claimed: 2020-08-21
- Assignees: Porvair PLC
- Applicants: Porvair, PLC
- Inventors: Matthew W. Willer; Kevin E. Keyzer
- Web page: https://patentgrep.com/patent/US20220055096A1

## CPC

- B22C 9/086: {Filters}
- B22C 9/082: {Sprues, pouring cups}
- B22C: FOUNDRY MOULDING (moulding refractory materials in general B28B)

## Abstract

An improved filtration system is provided. The filtration system comprises a pour cup comprising a reservoir and a filter engagement region wherein the filter engagement region comprises a pour cup taper, tab slots and a bottom. The filtration system also comprises a filter wherein the filter comprises a filter taper and filter tabs wherein the filter tabs can be received by the tab slots in one rotational orientation of the filter relative to the pour cup and the tab slots engage with the bottom in a second rotational orientation of the filter relative to the pour cup.

## Claims

### Claim 1

A filtration system comprising:
a pour cup comprising a reservoir and a filter engagement region wherein said filter engagement region comprises a pour cup taper, tab slots and a bottom; and
a filter wherein said filter comprises a filter taper and filter tabs wherein said filter tabs can be received by said tab slots in one rotational orientation of said filter relative to said pour cup and said tab slots engage with said bottom in a second rotational orientation of said filter relative to said pour cup.

### Claim 2 (depends on 1)

The filtration system of claim 1 wherein at least one of said pour cup taper or said filter taper have an angle of 30°+10°.

### Claim 3 (depends on 1)

The filtration system of claim 1 wherein said reservoir is tapered inward from top to bottom.

### Claim 4 (depends on 1)

The filtration system of claim 1 wherein said filter comprises at least two tabs to no more than six tabs.

### Claim 5 (depends on 1)

The filtration system of claim 1 wherein said filter further comprises a rotation assist feature.

### Claim 6 (depends on 5)

The filtration system of claim 5 wherein said rotation assist feature is selected from a protrusion and a depression.

### Claim 7 (depends on 1)

The filtration system of claim 1 wherein said filter is a matrix filter.

### Claim 8

A method for assembly a filter assembly comprising:
positioning a pour cup comprising a reservoir and a filter engagement region wherein said filter engagement region comprises a pour cup taper, tab slots and a bottom; and
orienting a filter relative to said pour cup wherein said filter comprises a filter taper and filter tabs with said filter tabs aligned with said tab slots;
inserting said filter through said reservoir to a position wherein said filter tabs are received by said tab slots; and
rotating said filter relative to said pour cup wherein said tab slots are not aligned with said tab slots and said filter tabs are engaged with said bottom.

### Claim 9 (depends on 8)

The method for assembly a filter assembly of claim 8 wherein at least one of said pour cup taper or said filter taper have an angle of 30°+10°.

### Claim 10 (depends on 8)

The method for assembly a filter assembly of claim 8 wherein said reservoir is tapered inward from top to bottom.

### Claim 11 (depends on 8)

The method for assembly a filter assembly of claim 8 wherein said filter comprises at least two tabs to no more than six tabs.

### Claim 12 (depends on 8)

The method for assembly a filter assembly of claim 8 wherein said filter further comprises a rotation assist feature.

### Claim 13 (depends on 12)

The method for assembly a filter assembly of claim 12 wherein said rotation assist feature is selected from a protrusion and a depression.

### Claim 14 (depends on 8)

The method for assembly a filter assembly of claim 8 wherein said filter is a matrix filter.