Portable filter

Patent metadata

Field	Value
Publication number	US-2020337486-A1
Application number	US-201916395746-A
Country	US
Kind code	A1
Filing date	Apr 26, 2019
Priority date	Apr 26, 2019
Publication date	Oct 29, 2020
Grant date	—

Abstract

In a method for cleaning a portable filter assembly including an elongated housing and a mouthpiece assembled with an outlet end port of the housing, the mouthpiece is disassembled from a female threaded portion of the outlet end port. A male threaded end connection of a cleaning fluid source is assembled to the female threaded portion of the outlet end port. A pressurized cleaning fluid is supplied from the cleaning fluid source to the outlet end port and through a filter element disposed in a fluid passage of the housing to expel the cleaning fluid and trapped contaminants from an inlet end port of the housing.

First claim

1 . A portable filter assembly comprising:
an elongated housing having a flow passage extending between an inlet end port and a female threaded outlet end port, wherein at least a portion of the flow passage is defined by a first chamber retaining a first filter element; and a mouthpiece including a male threaded base threadably assembled and sealingly connected with the female threaded outlet end port of the elongated housing, to allow fluid to be drawn through the flow passage and into the mouthpiece when suction is applied to the mouthpiece.

2 . The portable filter assembly of claim 1 , wherein the housing comprises a second chamber retaining a second filter element defining a portion of the flow passage.

3 . The portable filter assembly of claim 2 , wherein the housing comprises a first body member defining the outlet end port and the first chamber and a second body member defining the inlet end port and the second chamber.

4 . The portable filter assembly of claim 2 , wherein the first filter element comprises a carbon block filter element, and the second filter element comprises a hollow fiber filter element.

5 . The portable filter assembly of claim 1 , wherein the outlet end port includes an inner axial lip radially inward of a female threaded portion of the outlet end port to define an annular recess receiving an end portion of the male threaded base.

6 . The portable filter assembly of claim 5 , further comprising an apertured radial wall disposed radially inward of the axial lip.

7 . The portable filter assembly of claim 1 , wherein the inlet end port comprises a tube stub connection.

8 . The portable filter assembly of claim 1 , wherein the female threaded outlet end port comprises a standard garden hose thread.

9 . The portable filter assembly of claim 1 , wherein the mouthpiece includes an outer rim portion having a user graspable projection to facilitate user assembly and disassembly of the mouthpiece with the housing outlet end port.

10 . The portable filter assembly of claim 1 , further comprising a sealing cap removably assembled with the mouthpiece.

11 . The portable filter assembly of claim 1 , further comprising a cover member removably assembled with the inlet end port.

12 . The portable filter assembly of claim 1 , further comprising an O-ring seal disposed around the male threaded base of the mouthpiece for sealing engagement with the outlet end port.

13 . The portable filter assembly of claim 1 , wherein the inlet end port comprises a female threaded port.

14 . The portable filter assembly of claim 13 , wherein the inlet end port includes an inner axial lip radially inward of a female threaded portion of the inlet end port to define an annular recess.

15 . The portable filter assembly of claim 14 , wherein the inlet end port further includes a tube stub connection radially inward of the inner axial lip.

16 . A method of cleaning a portable filter assembly including an elongated housing and a mouthpiece assembled with an outlet end port of the housing, the method comprising:
disassembling the mouthpiece from a female threaded portion of the outlet end port; assembling a male threaded end connection of a cleaning fluid source to the female threaded portion of the outlet end port; and supplying a pressurized cleaning fluid from the cleaning fluid source to the outlet end port and through a filter element disposed in a fluid passage of the housing to expel the cleaning fluid and trapped contaminants from an inlet end port of the housing.

17 . The method of claim 16 , wherein the cleaning fluid source comprises one of a water hose and a water spigot.

18 . The method of claim 16 , wherein supplying the pressurized cleaning fluid comprises supplying water at a pressure of 25-35 psig.

19 . The method of claim 16 , wherein assembling the male threaded end connection of the cleaning fluid source to the female threaded portion of the outlet end port comprises effecting a leak-tight seal between the male threaded end connection and the female threaded outlet end port using one of a gasket, a washer, and an O-ring installed in the outlet end port.

20 . A portable filter assembly comprising:
a mouthpiece having a water outlet and a water inlet having a male thread connector; a housing having an inlet and an outlet and an upwards channel for a liquid from said inlet to said outlet, wherein the housing contains an ultrafiltration membrane; a female threaded connector integrally formed on the inlet of the housing; a female threaded connector integrally formed on the outlet of the housing; wherein the male threaded connector of the mouthpiece threadably connects with the female threaded connector on the outlet of the housing; wherein, after removing the mouthpiece, the female thread connector on the outlet of the housing can sealingly and threadably connect with a clean water resource and wash the ultrafiltration membrane by a downwards water flow.

Assignees

• Qingdao Ecopure Filter Co Ltd

Inventors

• Zou Zhibin

Classifications

• A47G21/188 Primary

  with filters to remove impurities · CPC title

• C02F1/444

  by ultrafiltration or microfiltration · CPC title

• C02F1/283

  using coal, charred products, or inorganic mixtures containing them · CPC title

• C02F1/002 Primary

  using small portable filters for producing potable water, e.g. personal travel or emergency equipment, survival kits, combat gear (C02F1/003 takes precedence) · CPC title

• B01D29/56

  in series connection · CPC title