# US 8,771,518 B2 · Method for filtering carrier oil

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- Number: US 8,771,518 B2
- Document ID: US8771518B2
- Status: Granted
- Kind: B2
- Application number: 13/190,177
- Filed: 2011-07-25
- Published: 2013-01-31
- Granted: 2014-07-08
- Earliest claimed: 2011-07-25
- Assignees: Hewlett-Packard Development Company, L.P.
- Applicants: Wayne J Schmidt; John A Thompson; John H Stewart
- Inventors: Wayne J Schmidt; John A Thompson; John H Stewart
- Web page: https://patentgrep.com/patent/US8771518B2

## CPC

- B01D 15/00: Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- G03G 15/104: {Preparing, mixing, transporting or dispensing developer}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

Fluid filtration systems and methods thereof to filter fluid in a first directional mode and a second directional mode are disclosed. Fluid filtration systems and methods thereof include a first directional mode, a second directional mode, and a filter unit. The filter unit includes a filter housing unit and a filter chamber disposed in the filter unit.

## Claims

### Claim 1

A method of filtering fluid in a first directional mode and in a second directional mode, the method comprising:
selectively transporting fluid through porous adsorbent material in a filter chamber of a filter housing unit of a filter unit to establish a first flow pattern in at least a first direction in the first directional mode to filter the fluid selectively transported in the at least first direction;
selectively transporting fluid through the porous adsorbent material in the filter chamber to establish a second flow pattern in at least a second direction in the second directional mode to filter the fluid selectively transported in the second direction such that the at least first direction is different than the at least second direction;
selectively transporting fluid to a first port of the filter unit and subsequently from a second port of the filter unit in the first directional mode; and
selectively transporting fluid to the second port and subsequently from the first port in the second directional mode such that the fluid includes carrier oil.

### Claim 2 (depends on 1)

The method according to claim 1, wherein:
the selectively transporting the fluid to the first port of the filter unit and subsequently from a second port of the filter unit in the first directional mode further comprises transporting the fluid through a reversible flow pump to the first port and from the second port in the first directional mode; and wherein:
the selectively transporting the fluid to the second port and subsequently from the first port in the second directional mode further comprises transporting the fluid through the reversible flow pump to the second port and from the first port in the second directional mode.