Pump filter with predetermined swirl

Patent metadata

Field	Value
Publication number	US-12290774-B2
Application number	US-202117545103-A
Country	US
Kind code	B2
Filing date	Dec 8, 2021
Priority date	Dec 8, 2021
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A lattice filter for use in an inlet housing of a pump assembly including a lattice filter body extending from a filter inlet end to a filter outlet end. The lattice filter having a lattice structure. The lattice filter also includes one or more passageways within the lattice filter body. Each of the one or more passageways includes a passageway inlet located at the filter inlet end and a passageway outlet located at the filter outlet end. Each of the one or more passageways extend from the passageway inlet to the passageway outlet.

First claim

What is claimed is:

1. A lattice filter for use in an inlet housing of a pump assembly, the lattice filter comprising:
a lattice filter body extending from a filter inlet end to a filter outlet end, the lattice filter having a lattice structure; and
one or more passageways within the lattice filter body,
wherein each of the one or more passageways includes a passageway inlet located at the filter inlet end and a passageway outlet located at the filter outlet end,
wherein each of the one or more passageways extend from the passageway inlet to the passageway outlet;
wherein each of the one or more passageways are a corkscrew passageway formed by a corkscrew wall that spirals around a central longitudinal axis A of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end; and
wherein the corkscrew wall is solid.

2. The lattice filter of claim 1 , wherein each of the one or more passageways curve, swirl, or spiral between the passageway inlet and the passageway outlet.

3. The lattice filter of claim 1 , wherein each of the one or more passageways curve, swirl, or spiral around a central longitudinal axis of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end.

4. The lattice filter of claim 1 , wherein each of the one or more passageways is devoid of the lattice structure of the lattice filter body or contains the lattice structure.

5. The lattice filter of claim 1 , wherein the corkscrew passageway has the lattice structure of the filter body.

6. A filter assembly, wherein the filter assembly is monolithic and comprises:
a filter housing having a tubular shape with an inlet aperture boundary at an inlet end and an outlet aperture boundary at an outlet end;
a lattice filter that is integrally formed with the filter housing via an additive manufacturing (AM) process, the lattice filter being located between the inlet aperture boundary and the outlet aperture boundary, the lattice filter comprising:
a lattice filter body extending from a filter inlet end to a filter outlet end, the lattice filter having a lattice structure; and
one or more passageways within the lattice filter body,
wherein each of the one or more passageways includes a passageway inlet located at the filter inlet end and a passageway outlet located at the filter outlet end,
wherein each of the one or more passageways extend from the passageway inlet to the passageway outlet;
wherein each of the one or more passageways are a corkscrew passageway formed by a corkscrew wall that spirals around a central longitudinal axis A of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end; and
wherein the corkscrew wall is solid.

7. The filter assembly of claim 6 , wherein each of the one or more passageways curve, swirl, or spiral between the passageway inlet and the passageway outlet.

8. The filter assembly of claim 6 , wherein each of the one or more passageways curve, swirl, or spiral around a central longitudinal axis of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end.

9. The filter assembly of claim 6 , wherein each of the one or more passageways is devoid of the lattice structure of the lattice filter body or contains the lattice structure.

10. The filter assembly of claim 6 , wherein the corkscrew passageway has the lattice structure of the filter body.

11. A method of manufacturing a filter housing and lattice filter for a filter assembly, wherein the filter housing and lattice filter are monolithic, the method comprising:
defining a filter housing as a tubular shape with an inlet aperture boundary at an inlet end, and an outlet aperture boundary at an outlet end;
defining a lattice filter between the inlet aperture boundary and the outlet aperture boundary; and
performing an additive manufacturing (AM) process to additively manufacture the filter housing and the lattice filter such that the lattice filter is integral with the filter housing,
the lattice filter comprising:
a lattice filter body extending from a filter inlet end to a filter outlet end, the lattice filter having a lattice structure; and
one or more passageways within the lattice filter body,
wherein each of the one or more passageways includes a passageway inlet located at the filter inlet end and a passageway outlet located at the filter outlet end,
wherein each of the one or more passageways extend from the passageway inlet to the passageway outlet;
wherein each of the one or more passageways are a corkscrew passageway formed by a corkscrew wall that spirals around a central longitudinal axis A of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end; and
wherein the corkscrew wall is solid.

12. The method of claim 11 , further comprising:
coupling the filter housing to a pump.

13. The method of claim 11 , wherein the AM process comprises applying laser bed powder fusion.

14. The method of claim 11 , wherein each of the one or more passageways curve, swirl, or spiral between the passageway inlet and the passageway outlet.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Zaffetti Mark A

Classifications

• B01D2201/31

  Other construction details · CPC title

• B01D2201/30

  Filter housing constructions · CPC title

• B01D46/52

  Particle separators, e.g. dust precipitators, using filters embodying folded {corrugated or wound sheet} material · CPC title

• B01D46/0016

  Folded frame or housing constructions · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title