# US 9,517,428 B2 · Filter for a portable industrial air filtration device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,428 B2 - Document ID: US9517428B2 - Status: Granted - Kind: B2 - Application number: 14/485,076 - Filed: 2014-09-12 - Published: 2016-03-17 - Granted: 2016-12-13 - Earliest claimed: 2014-09-12 - Assignees: Illinois Tool Works Inc. - Applicants: Illinois Tool Works, Inc. - Inventors: Ryan L. Francis; Stephen Patrick Moore - Web page: https://patentgrep.com/patent/US9517428B2 ## CPC - B01D 46/009: {Identification of filter type or position thereof, e.g. by transponders or bar codes} - B01D 46/0001: {Making filtering elements} - B01D 46/0086: {Filter condition indicators} - B01D 46/2411: {Filter cartridges} - B01D 46/44: controlling filtration - B01D 46/444: {by flow measuring} - B01D 46/446: {by pressure measuring} - B01D 46/46: automatic - B01D 46/56: with multiple filtering elements, characterised by their mutual disposition (B01D46/12 takes precedence) - B01D 46/64: arranged concentrically or coaxially - B01D 2273/30: Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan - 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) ## Abstract Various embodiments of the present disclosure provide a filter for a portable industrial air filtration device. The filter generally includes a body and a limit switch actuator attached to the body. The body includes filter media and a rigidized material. The filter media is attached to the rigidized material, and the body has opposing upper and lower edges. The limit switch actuator includes a head and an actuator connected to and extending from the head. The limit switch actuator is attached to the body such the actuator extends below the lower edge of the body and is configured to actuate a limit switch actuator of an air filtration device when the filter is installed in the air filtration device. ## Claims ### Claim 1 A filter comprising: a body including filter media and a rigidized material, wherein an upper portion of the rigidized material is disposed between a first portion of the filter media and a second portion of the filter media, wherein the first portion of the filter media, the upper portion of the rigidized material, and the second portion of the filter media are attached via stitching, the body having opposing upper and lower edges and opposing interior and exterior surfaces; and a limit switch actuator attached to the interior surface of the body and extending below the lower edge of the body. ### Claim 2 (depends on 1) The filter of claim 1, wherein the body is annularly-shaped. ### Claim 3 (depends on 1) The filter of claim 1, wherein the rigidized material forms the interior surface of the body. ### Claim 4 (depends on 3) The filter of claim 3, wherein the filter media forms the exterior surface of the body. ### Claim 5 (depends on 1) The filter of claim 1, wherein the filter media forms the exterior surface of the body. ### Claim 6 (depends on 1) The filter of claim 1, wherein the limit switch actuator includes a head and an actuator connected to and extending from the head, wherein the limit switch actuator is attached to the body such that the head contacts the interior surface of the body and the actuator extends below the lower edge of the body. ### Claim 7 (depends on 6) The filter of claim 6, wherein the limit switch actuator is attached to the body via at least one rivet. ### Claim 8 (depends on 1) The filter of claim 1, wherein the first portion of the filter media is connected to the second portion of the filter media. ### Claim 9 (depends on 1) The filter of claim 1, wherein a lower portion of the rigidized material is disposed between a third portion of the filter media and a fourth portion of the filter media, and the third portion of the filter media, the lower portion of the rigidized material, and the fourth portion of the filter media are attached via stitching. ### Claim 10 (depends on 9) The filter of claim 9, wherein the third portion of the filter media is connected to the fourth portion of the filter media. ### Claim 11 (depends on 10) The filter of claim 10, wherein the limit switch actuator includes a head and an actuator connected to and extending from the head. ### Claim 12 (depends on 9) The filter of claim 9, wherein the first portion of the filter media is connected to the second portion of the filter media, the third portion of the filter media is connected to the fourth portion of the filter media, and the second portion of the filter media is connected to the third portion of the filter media. ### Claim 13 (depends on 12) The filter of claim 12, wherein the first portion of the filter media terminates in a first free end and the fourth portion of the filter media terminates in a second free end. ### Claim 14 (depends on 1) The filter of claim 1, wherein a lower portion of the rigidized material is disposed between a third portion of the filter media and a fourth portion of the filter media, and the third portion of the filter media, the lower portion of the rigidized material, and the fourth portion of the filter media attached via stitching. ### Claim 15 (depends on 14) The filter of claim 14, wherein the third portion of the filter media is connected to the fourth portion of the filter media. ### Claim 16 (depends on 15) The filter of claim 15, wherein the limit switch actuator includes a head and an actuator connected to and extending from the head. ### Claim 17 A filter comprising: a body including filter media and a rigidized material, the filter media attached to the rigidized material, the body having opposing upper and lower edges and opposing side edges, wherein the side edges are directly attached to one another to form a single seam substantially aligned with a longitudinal axis of the body, the rigidized material forms an interior surface of the body and the filter media forms an exterior surface of the body, wherein an upper portion of the rigidized material is disposed between a first portion of the filter media and a second portion of the filter media, and wherein the first portion of the filter media, the upper portion of the rigidized material, and the second portion of the filter media are attached via stitching; and a limit switch actuator including a head attached to one of: (a) the interior surface of the body, and (b) the exterior surface of the body, and an actuator connected to and extending from the head, wherein the limit switch actuator is attached to the body such that the head contacts an interior surface of the body and the actuator extends below the lower edge of the body. ### Claim 18 A filter comprising: a body including filter media and a rigidized material, the filter media attached to the rigidized material, the body having opposing upper and lower edges, wherein: (a) an upper portion of the rigidized material is disposed between a first portion of the filter media and a second portion of the filter media, and the first portion of the filter media, the upper portion of the rigidized material, and the second portion of the filter media are attached via stitching; (b) a lower portion of the rigidized material is disposed between a third portion of the filter media and a fourth portion of the filter media, and the third portion of the filter media, the lower portion of the rigidized material, and the fourth portion of the filter media are attached via stitching; and (c) the third portion of the filter media is connected to the fourth portion of the filter media; and a limit switch actuator including a head and an actuator connected to and extending from the head, wherein the head is disposed between the third portion of the filter media and the fourth portion of the filter media and the actuator extends through the filter media proximate the lower edge of the body. ### Claim 19 (depends on 18) The filter of claim 18, wherein the first portion of the filter media is connected to the second portion of the filter media. ### Claim 20 (depends on 19) The filter of claim 19, wherein the second portion of the filter media is connected to the third portion of the filter media. ### Claim 21 (depends on 20) The filter of claim 20, wherein the first portion of the filter media terminates in a first free end and the fourth portion of the filter media terminates in a second free end. ### Claim 22 A filter comprising: a body including filter media and a rigidized material, the filter media attached to the rigidized material, the body having opposing upper and lower edges and opposing interior and exterior surfaces; and a limit switch actuator including a head and an actuator connected to and extending from the head, wherein the limit switch actuator is attached to the body via at least one rivet such that the head contacts the interior surface of the body and the actuator extends below the lower edge of the body.