# US 10,870,475 B2 · Aerostat anchoring, deployment, extended duration and recovery apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,870,475 B2 - Document ID: US10870475B2 - Status: Granted - Kind: B2 - Application number: 15/326,020 - Filed: 2014-06-12 - Published: 2017-07-20 - Granted: 2020-12-22 - Earliest claimed: 2013-06-12 - Applicants: Alfred Marcum - Inventors: Alfred Marcum - Web page: https://patentgrep.com/patent/US10870475B2 ## CPC - B64B 1/66: Mooring attachments - B64B 1/50: Captive balloons - B64B 1/58: Arrangements or construction of gas-bags; Filling arrangements - B64F 5/40: Maintaining or repairing aircraft - B64B: LIGHTER-THAN AIR AIRCRAFT - B64F: GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR ## Abstract A tethered aerostat with a ground based deployment, extended duration and recovery system to accommodate a weather vaning deployed aerostat while maintaining a supply of a lift gas by having a rotatable tether pipe and a hollow tether. Included is a rotatable tether pipe device assembly with rotor and stator components disposed in an air tight housing assembly to provide a ground based gas maintenance system. An aerostat deployment buoyancy control maintenance and combined recovery platform is provided. The tethered aerostat systems and method increase deployment duration and allow more systems to be controlled and maintained on the ground without interrupting aerostat operational capabilities. ## Claims ### Claim 1 A method for increasing the deployment duration of an aerostat comprising: (a) deploying the aerostat with a lift gas envelope and an internal pressure ballonet; (b) utilizing a tether having at least two separate gas passages; (c) connecting at least one of said two separate gas passages of the tether to the lift gas envelope and connecting at least one of said at least two separate gas passages to the internal pressure ballonet; and (d) providing an earth based plenum or ground based plenum to supply the lift gas to the lift gas envelope of the deployed aerostat and supplying an auxiliary gas to the internal pressure ballonet of the deployed aerostat. ### Claim 2 (depends on 1) The method for increasing the deployment duration of an aerostat of claim 1 wherein the ground based plenum has a second plenum for handling a gas from the deployed aerostat. ### Claim 3 (depends on 1) The method for increasing the deployment duration of an aerostat of claim 1 further comprising having a rotatable tether pipe assembly connected between the ground based plenum and the tether. ### Claim 4 (depends on 1) The method for increasing the deployment duration of an aerostat of claim 1 further comprising adding communications cables and electrical cables to the tether and aerostat. ### Claim 5 (depends on 1) The method for increasing the deployment duration of an aerostat of claim 1 further comprising having an earth based facility for supporting the earth based plenum to supply lift gas. ### Claim 6 (depends on 5) The method for increasing the deployment duration of an aerostat of claim 5 further comprising adding a launch and recovery system to the earth based facility. ### Claim 7 (depends on 6) The method for increasing the deployment duration of an aerostat of claim 6 further providing an anchoring vessel with rotatable and removeable tether pipe assembly disposed within the anchoring vessel. ### Claim 8 (depends on 7) The method for increasing the deployment duration of an aerostat of claim 7 further comprising attaching the anchoring vessel to the earth based plenum. ### Claim 9 (depends on 7) The method for increasing the deployment duration of an aerostat of claim 7 further comprising utilizing tether spool. ### Claim 10 (depends on 9) The method for increasing the deployment duration of an aerostat of claim 9 further comprising adding a capture bracket to the spool for capturing the rotatable tether pipe assembly. ### Claim 11 (depends on 1) The method for increasing the deployment duration of an aerostat of claim 1 further comprising the step of adding aerostat buoyancy control instruments to an earth based plenum and operating buoyancy requirements of the aerostat from the earth based plenum. ### Claim 12 A method to increase a deployment duration of an airship comprising: (a) deploying an airship having a lift gas envelope; (b) connecting a first end of a tether to the airship, said tether having a second end and at least one gas passage and at least one electrical cable and at least one communications cable; (c) providing an earth based air tight anchoring vessel having a rotor with an axial gas passage therethrough and a plurality of connectors disposed around the axial gas passage in the rotor, said air tight anchoring vessel also having a stator with an axial gas passage therethrough and a plurality of connectors disposed around the axial gas passage in the stator; and (d) connecting an earth based plenum to supply a lift gas through the axial gas passage in the stator and the axial gas passage in the rotor of the air tight anchoring vessel to the airship. ### Claim 13 (depends on 12) The method of claim 12 further comprising providing a second gas passage in the tether and connecting the first end of said second gas passage to the airship and the second end of the tether having the second gas passage to a radial gas passage in a detachable chimney on the air tight anchoring vessel. ### Claim 14 (depends on 12) The method of claim 12 further comprising providing for a flow of a contaminated lift gas from the airship through the first end of the tether having the second gas passage to the second end of the tether having the second gas passage to a detachable chimney on the earth based air tight anchoring vessel to recondition the contaminated lift gas at an earth based facility. ### Claim 15 (depends on 14) The method of claim 14 further comprising adding a launch and recovery system to the earth based facility. ### Claim 16 (depends on 12) The method of claim 12 further comprising the step of having an earth based facility for the earth based plenum. ### Claim 17 (depends on 16) The method of claim 16 wherein the earth based facility includes a tether spool. ### Claim 18 A method to increase the deployed duration of an aerostat comprising: (a) deploying an aerostat with a lift gas envelope; (b) utilizing a tether having at least two separate gas passages; (c) connecting one end of the tether having the at least two separate gas passages to the aerostat; (d) connecting the other end of the tether having at least two separate gas passages to an earth based anchoring vessel having a rotor and a stator with an axial gas passage through the rotor and stator and at least one radial gas passage through a detachable chimney attached to the earth based anchoring vessel; and (e) connecting one of the at least two separate gas passages in the tether to the axial gas passage through the rotor and stator to the earth based anchoring vessel. ### Claim 19 (depends on 18) The method to increase the deployed duration of the aerostat of claim 18 further comprising adding communications cables and electrical cables to the tether and aerostat. ### Claim 20 (depends on 18) The method to increase the deployed duration of the aerostat of claim 18 further comprising having a gas chamber in the detachable chimney communicating with the at least one of the at least two gas passages in the tether.