# US 11,439,935 B2 · Device for the separation of flue gas particles in laparoscopy > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,935 B2 - Document ID: US11439935B2 - Status: Granted - Kind: B2 - Application number: 16/477,945 - Filed: 2018-01-15 - Published: 2019-12-05 - Granted: 2022-09-13 - Earliest claimed: 2017-01-13 - Assignees: W.O.M. World of Medicine GmbH - Applicants: W.O.M. World of Medicine GmbH - Inventors: Fabian Langen; Peter Juelg - Web page: https://patentgrep.com/patent/US11439935B2 ## CPC - B01D 45/16: generated by the winding course of the gas stream {, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes} - B01D 46/0036: {by adsorption or absorption} - B01D 50/20: Combinations of devices covered by groups B01D45/00 and B01D46/00 - B01D 53/0407: {Constructional details of adsorbing systems} - B01D 53/261: {by adsorption} - A61B 2218/008: for smoke evacuation - B01D 2253/102: Carbon - B01D 2253/202: Polymeric adsorbents - B01D 2259/4533: for medical purposes - B04C 2003/006: {Construction of elements by which the vortex flow is generated or degenerated} - B04C 2009/002: {with external filters} - 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) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B04C: APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES ({centrifugal separation of water from steam B01D45/12;} jet mills B02C19/06; {wind sifters B07B7/00;} cyclonic type combustion apparatus F23; {vortex burners for cyclone-type combustion apparatus F23D1/02; cyclonic type combustion apparatus for gas turbines F23R3/00}) ## Abstract Subject matter of the present invention is a device for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases during laparoscopic interventions. ## Claims ### Claim 1 A device for the separation of particles, drop-lets, and humidity from flowing flue gases having a flow rate of 3 to 20 l/min, comprising a tube of length 1 of 10 to 50 mm, the tube having an inner diameter di of 4 to 20 mm, comprising an axially located flow body K having a web cross-section of 0.5 to 6 mm, comprising two to six guide vanes L disposed between the axially located flow body K and the inner wall of the tube, the guide vanes L being rigidly connected to the inner wall of the tube, wherein the guide vanes L are helically arranged so as to confer a radial movement component to the gas flowing through, the guide vanes having a ratio S of a vane entry surface area FE to a vane exit surface area FA of between 2.7 and 3.3; wherein the vane entry surface are FE defines an effective flow cross-section at an inlet to the guide vanes and the vane exit surface area FA defines a flow cross-section at an outlet from the guide vanes. ### Claim 2 (depends on 1) The device according to claim 1 comprising 3 to 5 guide vanes L. ### Claim 3 (depends on 2) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 2. ### Claim 4 (depends on 1) The device according to claim 1, wherein the guide vanes have an exit angle β between the axially located flow body K and the tube cross-section of 20 to 30 degrees. ### Claim 5 (depends on 4) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 4. ### Claim 6 (depends on 1) The device according to claim 1, wherein the ratio of a length lk of the axial flow body to the web cross-section of the axial flow body dK is between 2 and 3. ### Claim 7 (depends on 6) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 6. ### Claim 8 (depends on 1) The device according to claim 1, wherein the ratio of a length la between the last edge of the guide vane, in the direction of flow, and a tube exit to the web cross-section of the axial flow body dK is between 2 and 4. ### Claim 9 (depends on 8) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 8. ### Claim 10 (depends on 1) The device according to claim 1, wherein the connection between the axial flow body and the guide vane is orthogonal or secant-shaped. ### Claim 11 (depends on 10) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 10. ### Claim 12 (depends on 1) The device according to claim 1, wherein the tube with flow body and guide vanes is integrated in a housing in which particles, liquids and/or gases are separated. ### Claim 13 (depends on 12) The device according to claim 12, further comprising a fiber filter, a humidity-absorbing material and activated carbon, wherein particles are separated by the fiber filter, water is separated by the humidity-absorbing material gases are separated by the activated carbon. ### Claim 14 (depends on 13) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 13. ### Claim 15 (depends on 12) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 12. ### Claim 16 (depends on 1) A method for the separation of flue gas particles and liquid droplets in the exhaustion of surgical gases in medical devices which comprises utilizing the device of claim 1. ### Claim 17 (depends on 1) The device according to claim 1 wherein the guide vanes having a ratio S of a vane entry surface area FE to a vane exit surface area FA of between 2 and 5.