# US 10,865,126 B2 · Stormwater filter socks with multiple separated tubes > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,126 B2 - Document ID: US10865126B2 - Status: Granted - Kind: B2 - Application number: 16/279,269 - Filed: 2019-02-19 - Published: 2019-08-22 - Granted: 2020-12-15 - Earliest claimed: 2018-02-19 - Assignees: New Pig Corporation - Applicants: New Pig Corporation - Inventors: Matthew James Riley; Michael James Verti; Dane R. Jackson - Web page: https://patentgrep.com/patent/US10865126B2 ## CPC - C02F 1/281: {using inorganic sorbents} - B01D 15/18: relating to flow patterns - B01J 20/2805: {Sorbents inside a permeable or porous casing, e.g. inside a container, bag or membrane} - C02F 1/283: {using coal, charred products, or inorganic mixtures containing them} - C02F 1/285: {using synthetic organic sorbents} - C02F 1/286: {using natural organic sorbents or derivatives thereof} - E03F 5/0404: {with a permanent or temporary filtering device; Filtering devices specially adapted therefor} - C02F 2101/20: Heavy metals or heavy metal compounds - C02F 2101/32: Hydrocarbons, e.g. oil - C02F 2103/001: {Runoff or storm water} - C02F 2201/002: Construction details of the apparatus - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) - 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) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - E03F: SEWERS; CESSPOOLS ## Abstract Multiple-tube stormwater filter socks may be used to mitigate stormwater environmental runoff of sediment, hydrocarbons and heavy metals. The stormwater filter socks comprise at least two tubes that are spaced apart by a separator web, and are filled with different types of absorbent media. The stormwater filter socks may be placed around the top grate of a storm drain chamber, and around other environmental runoff sources such as trash bins, roof downspouts and outdoor material stockpiles. The multiple-tube stormwater filter socks may be used to mitigate drips and spills of hydrocarbons such as motor oils, and may be used to contain zinc, copper, lead, chromium, cadmium and other heavy metals. ## Claims ### Claim 1 A multiple-tube stormwater filter sock comprising: a downstream tube comprising a liquid permeable outer shell and an absorbent media at least partially filling the outer shell; an upstream tube comprising a liquid permeable outer shell and an absorbent media at least partially filling the outer shell, wherein the absorbent media of the downstream tube is different than the absorbent media of the upstream tube; and a separator web between the downstream and upstream tubes having a width W measured between the downstream and upstream tubes, wherein the separator web is structured and arranged to allow side-by-side bending of the downstream and upstream tubes during installation of the stormwater filter sock. ### Claim 2 (depends on 1) The stormwater filter sock of claim 1, wherein the downstream tube has a horizontal width, the upstream tube has a horizontal width, and the width W of the separator web is at least 10 percent of the horizontal width of either the downstream or upstream tubes. ### Claim 3 (depends on 2) The stormwater filter sock of claim 2, wherein the width W of the separator web is at least 20 percent of the horizontal widths of the downstream and upstream tubes. ### Claim 4 (depends on 2) The stormwater filter sock of claim 2, wherein the downstream tube has a generally circular cross-section having a diameter D1, the upstream tube has a generally circular cross-section having a diameter D2, and the width W of the separator web is at least 20 percent of either the diameter D1 of the downstream tube or the diameter D2 of the upstream tube. ### Claim 5 (depends on 4) The stormwater filter sock of claim 4, wherein the width W of the separator web is at least 25 percent of the diameter D1 of the downstream tube and the diameter D2 of the upstream tube. ### Claim 6 (depends on 2) The stormwater filter sock of claim 2, wherein the width W of the separator web is from 0.5 to 3 inches. ### Claim 7 (depends on 6) The stormwater filter sock of claim 6, wherein the horizontal widths of the downstream and upstream tubes are from 1 to 10 inches. ### Claim 8 (depends on 7) The stormwater filter sock of claim 7, wherein the horizontal widths of the downstream and upstream tubes are from 2 to 6 inches. ### Claim 9 (depends on 2) The stormwater filter sock of claim 2, wherein the ratio of the horizontal width of the upstream tube to the horizontal width of the downstream tube ranges from 1:2 to 16:1. ### Claim 10 (depends on 2) The stormwater filter sock of claim 2, wherein the horizontal widths of the downstream and upstream tubes are substantially the same. ### Claim 11 (depends on 1) The stormwater filter sock of claim 1, wherein the upstream tube has a cross-sectional area, the downstream tube has a cross-sectional area, and a ratio of the upstream to downstream tube cross-sectional areas ranges from 1:2 to 16:1. ### Claim 12 (depends on 1) The stormwater filter sock of claim 1, wherein the upstream and downstream tube cross-sectional areas are substantially the same. ### Claim 13 (depends on 1) The stormwater filter sock of claim 1, wherein the separator web extends substantially horizontally between the downstream and upstream tubes. ### Claim 14 (depends on 1) The stormwater filter sock of claim 1, wherein the liquid permeable shells of the downstream and upstream tubes are permeable to hydrocarbons. ### Claim 15 (depends on 14) The stormwater filter sock of claim 14, wherein the liquid permeable shells of the downstream and upstream tubes are made of a woven fabric comprising polypropylene, polyester, nylon, or cellulosic material. ### Claim 16 (depends on 15) The stormwater filter sock of claim 15, wherein the separator web comprises the same material as either the downstream or upstream tubes. ### Claim 17 (depends on 1) The stormwater filter sock of claim 1, wherein the separator web comprises extensions of material from the downstream and upstream liquid permeable shells. ### Claim 18 (depends on 1) The stormwater filter sock of claim 1, wherein the downstream and upstream liquid permeable shells are made from separate pieces of fabric that are sewn together. ### Claim 19 (depends on 1) The stormwater filter sock of claim 1, wherein the downstream liquid permeable shell, upstream liquid permeable shell, and separator web are made from a single continuous tube of liquid permeable fabric. ### Claim 20 (depends on 1) The stormwater filter sock of claim 1, wherein the absorbent media of the downstream tube is a hydrocarbon-absorbing media, and the absorbent media of the upstream tube is a heavy metal-absorbing media. ### Claim 21 (depends on 20) The stormwater filter sock of claim 20, wherein the absorbent media of the downstream tube comprises granular zeolite, partite, activated carbon or cellulosic material, and the absorbent media of the upstream tube comprises fibers of polypropylene, polyester, or cellulosic material. ### Claim 22 (depends on 21) The stormwater filter sock of claim 21, wherein the absorbent media of the upstream tube comprises a rolled or folded mat. ### Claim 23 A multiple-tube stormwater filter sock comprising: a downstream tube comprising a liquid, permeable outer shell and an absorbent media at least partially filling the outer shell; an upstream tube comprising a liquid permeable outer shell and an absorbent media at least partially filling the outer shell; and a separator web between the downstream and upstream tubes having a width W measured between the downstream and upstream tubes, wherein the separator web is structured and arranged to allow side-by-side bending of the downstream and upstream tubes during installation of the stormwater filter sock, and the downstream and upstream liquid permeable shells are made from separate pieces of fabric that are sewn together.