# US 8,540,808 B2 · Venting and filtration systems with gas permeable membrane > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,808 B2 - Document ID: US8540808B2 - Status: Granted - Kind: B2 - Application number: 13/480,189 - Filed: 2012-05-24 - Published: 2012-09-13 - Granted: 2013-09-24 - Earliest claimed: 2008-10-30 - Assignees: Porous Media Corporation - Applicants: Robert O. Crowder; John H. Burban; Steven T. Jersey; Kevin Carlson; Michael Savellev - Inventors: Robert O. Crowder; John H. Burban; Steven T. Jersey; Kevin Carlson; Michael Savellev - Web page: https://patentgrep.com/patent/US8540808B2 ## CPC - B01D 19/0031: {by filtration} - 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 Embodiments of the invention provide venting and filtration systems with a membrane that is permeable to gas and substantially impermeable liquid. The systems can remove a gas from a liquid entrained with gas. The systems can include a reservoir in fluid communication with the membrane and a liquid outlet. The membrane can help prevent the gas from reaching the liquid outlet. ## Claims ### Claim 1 A passive filtration system that filters liquids entrained with gas, the liquids including one of liquid food product and drinking water, the filtration system comprising: a housing including a reservoir; a filter positioned in the reservoir, the filter dividing the reservoir into an upstream chamber and a downstream chamber; and a non-porous membrane in fluid communication with the upstream chamber, the non-porous membrane being permeable to gas in order to vent gas from the one of liquid food product and drinking water in the reservoir. ### Claim 2 (depends on 1) The filtration system of claim 1, and further comprising a fluid inlet in fluid communication with the upstream chamber. ### Claim 3 (depends on 1) The filtration system of claim 1, and further comprising a liquid outlet in fluid communication with the downstream chamber. ### Claim 4 (depends on 1) The filtration system of claim 1, and further comprising a gas outlet in fluid communication with the non-porous membrane. ### Claim 5 (depends on 1) The filtration system of claim 1, wherein the gas is vented to an ambient environment of the filtration system. ### Claim 6 (depends on 1) The filtration system of claim 1, wherein the filter is evenly wetted by the liquid. ### Claim 7 (depends on 1) The filtration system of claim 1, wherein the non-porous membrane is constructed of at least a thermoset polymer. ### Claim 8 (depends on 1) The filtration system of claim 1, wherein the non-porous membrane is constructed of at least a silicone. ### Claim 9 A filtration system that filters liquids from one of liquid food product and drinking water entrained with gas, the filtration system comprising: a housing including a reservoir; a filter positioned in the reservoir, the filter dividing the reservoir into an upstream chamber and a downstream chamber; and a membrane in fluid communication with the upstream chamber and the downstream chamber in the reservoir, the membrane permeable to the gas in order to allow the gas to flow from the upstream chamber to at least one of the downstream chamber and out of the housing in combination with at least a portion of the one of liquid food product and drinking water. ### Claim 10 (depends on 9) The filtration system of claim 9, and further comprising a fluid inlet in fluid communication with the upstream chamber. ### Claim 11 (depends on 9) The filtration system of claim 9, and further comprising a liquid outlet in fluid communication with the downstream chamber. ### Claim 12 (depends on 9) The filtration system of claim 9, wherein the membrane is porous. ### Claim 13 (depends on 12) The filtration system of claim 12, wherein the membrane is hydrophobic. ### Claim 14 (depends on 12) The filtration system of claim 12, wherein the membrane is constructed of one of polytetrafluoroethylene, polypropylene, and polyethylene. ### Claim 15 (depends on 9) The filtration system of claim 9, wherein the membrane is non-porous. ### Claim 16 (depends on 15) The filtration system of claim 15, wherein the membrane is constructed of at least a thermoset polymer. ### Claim 17 (depends on 15) The filtration system of claim 15, wherein the membrane is constructed of at least a silicone.