# US 10,500,534 B2 · Air permeable vent filter, and headlight assembly comprising same

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- Number: US 10,500,534 B2
- Document ID: US10500534B2
- Status: Granted
- Kind: B2
- Application number: 15/622,521
- Filed: 2017-06-14
- Published: 2017-09-28
- Granted: 2019-12-10
- Earliest claimed: 2014-12-19
- Assignees: Amogreentech Co., Ltd.
- Applicants: Amogreentech Co., Ltd.
- Inventors: Kyung Su Kim
- Web page: https://patentgrep.com/patent/US10500534B2

## CPC

- B01D 46/546: {using nano- or microfibres}
- B01D 39/14: Other self-supporting filtering material {; Other filtering material (non-woven fabrics in general D04H3/00)}
- B01D 39/1623: {of synthetic origin}
- B01D 46/0036: {by adsorption or absorption}
- B01D 46/528: {using wound sheets (B01D46/527 takes precedence)}
- D04H 1/728: by electro-spinning {(electro-spinning methods and apparatus D01D5/0007)}
- F21S 41/29: Attachment thereof (for achieving variable light distribution F21S41/63)
- F21S 45/10: Protection of lighting devices (cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50)
- F21S 45/33: specially adapted for headlamps
- B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)}
- B01D 46/0027: {with additional separating or treating functions}
- B01D 46/003: {including coalescing means for the separation of liquid}
- B01D 46/527: {in wound arrangement}
- B01D 46/62: connected in series
- B01D 2239/025: comprising nanofibres
- B01D 2239/0631: Electro-spun
- B01D 2275/20: Shape of filtering material
- B01D 2279/35: for venting arrangements
- 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)
- D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B)
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS

## Abstract

Provided are an air permeable vent filter, and a headlight assembly comprising the same. The air permeable vent filter has a body in which a nanofiber web, which comprises a plurality of pores and is formed by accumulating a nanofiber electrospun from a spinning solution in which a polymer material and a solvent are mixed, is spirally wound, and the air permeable vent filter implements an air permeable filter function of allowing air to pass through from one lateral side of the body to the other lateral side and blocking liquids and solids.

## Claims

### Claim 1

An air permeable vent filter comprising:
a body formed of a spirally wound nanofiber web, the spirally wound nanofiber web being formed of electrospun and accumulated nanofibers, the electrospun and accumulated nanofibers being formed of a polymer material, and the spirally wound nanofiber web having a plurality of pores, whereby the body blocks liquid and foreign matters when air passes from one side of the body to the other side thereof; and
a hygroscopic filter disposed adjacent to the other side of the body, the hygroscopic filter including a flow path member and a hygroscopic agent, wherein the flow path member includes an air flow path through which the air flown from the other side of the body passes, and the hygroscopic agent is placed along the air flow path, whereby moisture in the air is absorbed by the hygroscopic agent,
wherein the flow path member comprises: a first flow path member; and a second flow path member, wherein the hygroscopic agent includes: a hygroscopic agent powder applied between the first flow path member and the second flow path member, and wherein the first flow path member and the second flow path member are spirally wound with the hygroscopic agent powder in-between to form the hygroscopic filter.

### Claim 2 (depends on 1)

The air permeable vent filter of claim 1, wherein the body further includes: an adhesive adhering nanofiber webs in the spirally wound nanofiber web.

### Claim 3 (depends on 2)

The air permeable vent filter of claim 2, wherein the adhesive is selected from the group consisting of an epoxy resin, an acrylic resin, a urethane resin, a silicone resin, a phenol resin and a rubber-based adhesive, and a hot-melt web adhesive.

### Claim 4 (depends on 3)

The air permeable vent filter of claim 3, wherein the hot-melt web adhesive comprises a structure selected from the group consisting of a web structure having multi-pores in which a fiber made of a hot-melt material is accumulated, and a structure of a non-pore state.

### Claim 5 (depends on 1)

The air permeable vent filter of claim 1, wherein the hygroscopic filter further includes: a guide member into which the flow path member is inserted.

### Claim 6 (depends on 5)

The air permeable vent filter of claim 5, wherein the guide member selected from the group consisting of a nanofiber web and a nonwoven fabric.

### Claim 7 (depends on 1)

The air permeable vent filter of claim 1, wherein the flow path member is one selected from the group consisting of a nonwoven fabric, a nanofiber web, and a nonwoven fabric laminated with a nanofiber web.

### Claim 8 (depends on 1)

The air permeable vent filter of claim 1, further comprising: a tube surrounding the air permeable vent filter.

### Claim 9

A headlight assembly comprising:
a support having an insertion hole;
an air permeable device inserted into the insertion hole, wherein the air permeable device comprises: a body formed of a spirally wound nanofiber web, the spirally wound nanofiber web being formed of electrospun and accumulated nanofibers, the electrospun and accumulated nanofibers being formed of a polymer material, and the spirally wound nanofiber web having a plurality of pores, whereby the body blocks liquid and foreign matters when air passes from one side of the body to the other side thereof; and a hygroscopic filter disposed adjacent to the other side of the body, the hygroscopic filter including a flow path member and a hygroscopic agent, wherein the flow path member includes an air flow path through which the air flown from the other side of the body passes, and the hygroscopic agent is placed along the air flow path, whereby moisture in the air is absorbed by the hygroscopic agent,
wherein the flow path member comprises: a first flow path member; and a second flow path member, wherein the hygroscopic agent includes: a hygroscopic agent powder applied between the first flow path member and the second flow path member, and wherein the first flow path member and the second flow path member are spirally wound with the hygroscopic agent powder in-between to form the hygroscopic filter;
a tube surrounding the air permeable device;
a lamp mounted on the support; and
a protective transparent member that covers the lamp and transmits light emitted from the lamp and is fixed to the support.

### Claim 10 (depends on 9)

The headlight assembly of claim 9, wherein the air permeable device further comprises: a protective cap mounted on the tube, wherein the protective cap and the tube are spaced apart from each other, and a gap region between the protective cap and the tube is used as an air layer in which external air is supplied into the body.