# US 12,222,234 B2 · Isolated industrial float assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,222,234 B2 - Document ID: US12222234B2 - Status: Granted - Kind: B2 - Application number: 17/666,805 - Filed: 2022-02-08 - Published: 2022-08-11 - Granted: 2025-02-11 - Earliest claimed: 2021-02-08 - Applicants: Zach Cadwallader - Inventors: Zach Cadwallader - Web page: https://patentgrep.com/patent/US12222234B2 ## CPC - G01F 23/76: characterised by the construction of the float - G01F 23/64: of the free float type {without mechanical transmission elements} - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME ## Abstract An isolated industrial float assembly is sized to fit interior to an existing gauge pole to signal a fluid level to an observer while preventing or lowering emissions from volatilization of fluids from the gauge pole. The isolated industrial float assembly includes a positively buoyant core manufactured from hydrocarbon resistant foam sealed within a shell. End caps enclose the shell. A vertical member secures the end caps tautly in position by connection with fasteners. Assembly and disassembly of the float assembly is enabled to replace parts as needed. The buoyancy of the core is sufficient to cause the float assembly to maintain position at the fluid-atmosphere interface, even in embodiments where the shell is fabricated of stainless steel. ## Claims ### Claim 1 An isolated industrial float assembly comprising: a positively buoyant core; an impermeable and durable tubular shell surrounding the core; an end cap disposed at an upper end of the shell, said end cap enclosing the upper end of the shell; a vertical member disposed longitudinally through the core, said vertical member protruding at least an upper end through the end cap and secured therethrough; and at least one looped member disposed arched over the upper end of the shell; wherein the float assembly is positional floating interior to the gauge pole to demark and signal a fluid level therein and to lessen emissions of volatile fractions therefrom. ### Claim 2 (depends on 1) The isolated industrial float assembly of claim 1 wherein the end cap further comprises a skirting disposed to overhang the shell and contact the gauge pole to lessen emissions from the gauge pole without impeding movement of the float assembly upon the fluid level. ### Claim 3 (depends on 2) The isolated industrial float assembly of claim 2 wherein the float assembly further comprises a lower end cap disposed to enclose the lower end of the shell. ### Claim 4 (depends on 3) The isolated industrial float assembly of claim 3 wherein the lower end cap is secured in place by engagement of the vertical member therethrough. ### Claim 5 (depends on 3) The isolated industrial float assembly of claim 3 wherein the lower end cap is welded, fused, or directly attached to the shell. ### Claim 6 (depends on 5) The isolated industrial float assembly of claim 5 wherein the vertical member secures to a threadable member welded, fused, or directly attached to an interior surface of the lower end cap. ### Claim 7 An isolated industrial float assembly comprising: a positively buoyant core; a durable, noncorrosive, impervious tubular shell surrounding the core; an upper end cap disposed at an upper end of the shell, said upper end cap enclosing the upper end of the shell; a flexible skirting disposed to protrude from the upper end cap, said skirting disposed to overhang the shell; a lower end cap disposed at a lower end of the shell, said lower end cap enclosing the lower end of the shell; a vertical member disposed longitudinally through the core, said vertical member protruding at least an upper end through the upper end cap and secured therethrough; and at least one looped member disposed arched over the upper end of the shell; wherein the float assembly is positional floating interior to the gauge pole to demark and signal a fluid level therein and to lessen emissions of volatile fractions therefrom. ### Claim 8 (depends on 7) The isolated industrial float assembly of claim 7 wherein the lower end cap is secured in place by engagement of the vertical member therethrough. ### Claim 9 (depends on 8) The isolated industrial float assembly of claim 8 wherein the shell is made of high quality steel. ### Claim 10 (depends on 7) The isolated industrial float assembly of claim 7 wherein the lower end cap is welded, fused, or directly attached to the shell. ### Claim 11 (depends on 10) The isolated industrial float assembly of claim 10 wherein the vertical member secures to a threadable member welded, fused, or directly attached to an interior surface of the lower end cap. ### Claim 12 (depends on 11) The isolated industrial float assembly of claim 11 wherein the shell is made of high quality steel. ### Claim 13 An isolated industrial float assembly comprising: a positively buoyant core comprising a foam resistant to corrosion when exposed to hydrocarbons, said core having a volume sufficient to displace a volume of liquid hydrocarbon exceeding the weight of the float assembly and thereby maintain positive buoyancy of the float assembly within the liquid hydrocarbon; a tubular steel shell surrounding the core; an upper end cap disposed at an upper end of the shell, said upper end cap enclosing the upper end of the shell; a flexible skirting disposed to protrude from the upper end cap, said skirting disposed to overhang the shell and contact the interior of the gauge pole without impeding movement of the float assembly upon the fluid level in the gauge pole; a lower end cap disposed at a lower end of the shell, said lower end cap enclosing the lower end of the shell; a vertical member disposed longitudinally through the core, said vertical member protruding at least an upper end through the upper end cap and secured therethrough; and at least one looped member disposed arched over the upper end of the shell; wherein the float assembly is positional floating interior to the gauge pole to demark and signal a fluid level therein and to lessen emissions of volatile fractions therefrom. ### Claim 14 (depends on 13) The isolated industrial float assembly of claim 13 wherein the core is made from polymeric methylene diphenyl diisocyanate and polyol closed cell foam. ### Claim 15 (depends on 14) The isolated industrial float assembly of claim 14 wherein the shell is fabricated from 316 stainless steel. ### Claim 16 (depends on 15) The isolated industrial float assembly of claim 15 wherein the lower end cap is secured in place by engagement of the vertical member therethrough. ### Claim 17 (depends on 15) The isolated industrial float assembly of claim 15 wherein the lower end cap is welded, fused, or directly attached to the shell. ### Claim 18 (depends on 17) The isolated industrial float assembly of claim 17 wherein the vertical member secures to a threadable member welded, fused, or directly attached to an interior surface of the lower end cap.