# US 12,595,871 B2 · Pipe renovation filtration system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,595,871 B2 - Document ID: US12595871B2 - Status: Granted - Kind: B2 - Application number: 18/421,714 - Filed: 2024-01-24 - Published: 2024-05-16 - Granted: 2026-04-07 - Earliest claimed: 2020-04-14 - Assignees: Pipe Lining Enterprises, Inc. - Applicants: Pipe Lining Enterprises, Inc. - Inventors: Larry W. Kiest, Jr. - Web page: https://patentgrep.com/patent/US12595871B2 ## CPC - F16L 55/18: Appliances for use in repairing pipes (F16L55/10 takes precedence) - B01D 46/0005: {Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence)} - B08B 15/00: Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area - F16L 55/1652: {the flexible liner being pulled into the damaged section} - F16L 55/165: a pipe {or flexible liner} being inserted in the damaged section - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - 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) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL ## Abstract A filtration system is used with a pipe repair system, such as a cured-in-place pipe lining system. Before, during, and/or after the repair of the pipe with the pipe lining system, air from inside the pipe is directed into a filtration system. The filtration system removes contaminants, such as VOCs and other harmful gases, particles, and the like, with a filter, and then the filtered air is exhausted from the system. The filter can be a carbon filter or other filter that can remove harmful or hazardous materials and particles from the air prior to exhaust. The air is also sensed to acquire information, such as temperature, pressure, composition, flow, or the like. ## Claims ### Claim 1 A method of repairing a pipe system comprising: repairing at least a portion of the pipe system using a cured-in-place-pipe system comprising a resin impregnated liner pressed against the wall of a pipe of the pipe system; curing the resin impregnated in the liner with steam; urging the steam through the pipe system to an exhaust location; filtering the steam at the exhaust location by passing the steam through a first filter to remove at least some water droplets from the steam and passing the remaining steam through a second filter to remove contaminants from the remaining steam. ### Claim 2 (depends on 1) The method of claim 1, further comprising inserting a plug in the pipe system to mitigate the steam from entering a house or other structure. ### Claim 3 (depends on 1) The method of claim 1, further comprising pressurizing the steam in the pipe system. ### Claim 4 (depends on 1) The method of claim 1, further comprising condensing the steam into droplets of water adjacent the first or second filter. ### Claim 5 (depends on 1) The method of claim 1, wherein the second filter comprises a carbon filter. ### Claim 6 (depends on 1) The method of claim 1, wherein the first filter comprises a screen. ### Claim 7 (depends on 1) The method of claim 1, wherein the exhaust location is adjacent a sewer manhole. ### Claim 8 (depends on 1) The method of claim 1, wherein the exhaust location is a sewer cleanout. ### Claim 9 (depends on 1) The method of claim 1, further comprising sensing the remaining steam after the exhaust to determine the amount of contaminants in the remaining steam. ### Claim 10 (depends on 1) The method of claim 1, further comprising sensing, with a sensor, an amount of contaminants in the steam. ### Claim 11 (depends on 10) The method of claim 10, wherein the sensor is positioned between the pipe system and the filtration system. ### Claim 12 (depends on 1) The method of claim 1, further comprising sensing, with a sensor, an amount of contaminants in the steam prior to filtering the steam with the filtration system. ### Claim 13 A system for filtering steam and/or air associated with the repair of a pipe system, comprising: a resin impregnated liner positioned at least partially in a pipe of the pipe system; a pressure source to press the resin impregnated liner against the wall of the pipe, the pressure source comprising pressurized steam; a filtration system at an exhaust location of the pipe system, the filtration system comprising a first filter to remove at least some water droplets from the pressurized steam and a second filter that receives the pressurized steam from the first filter and configured to remove contaminants therefrom. ### Claim 14 (depends on 13) The system of claim 13, further comprising a plug in the pipe system to mitigate the pressurized steam from entering a house or other structure. ### Claim 15 (depends on 13) The system of claim 13, wherein the first filter comprises a screen. ### Claim 16 (depends on 13) The system of claim 13, wherein the second filter comprises a carbon filter. ### Claim 17 (depends on 13) The system of claim 13, further comprising a sensor at the exhaust, and wherein the at least one sensor comprises one or more of: a. a temperature sensor; b. a pressure sensor; c. a chemical sensor; d. an air quality sensor; or e. a flow meter. ### Claim 18 (depends on 13) The system of claim 13, further comprising a condensation system at the exhaust location to reduce the appearance of a plume of steam being exhausted from the pipe system. ### Claim 19 (depends on 13) The system of claim 13, wherein the exhaust location comprises one end of the resin impregnated liner. ### Claim 20 (depends on 13) The system of claim 13, wherein the exhaust location comprises a sewer cleanout. ### Claim 21 A method of filtering steam and/or air from a pipe system being repaired with CIPP, the method comprising: directing a mixture of steam and compressed air through a resin impregnated liner towards an exhaustion location; pressing the liner against the wall of a pipe with the mixture; filtering the mixture at the exhaust location with a first filter that removes water droplets from the mixture; directing remaining mixture from the first filter through a second filter to remove contaminants from the remaining mixture; and exhausting the remaining mixture after the second filter. ### Claim 22 (depends on 21) The method of claim 21, further comprising condensing the steam at or near the exhaust location to reduce the appearance of a plume of steam being exhausted from the pipe system. ### Claim 23 (depends on 21) The method of claim 21, wherein the first filter comprises a screen.