# US 10,118,825 B2 · Oxygen generators > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,118,825 B2 - Document ID: US10118825B2 - Status: Granted - Kind: B2 - Application number: 15/103,873 - Filed: 2014-12-11 - Published: 2016-10-27 - Granted: 2018-11-06 - Earliest claimed: 2013-12-12 - Assignees: Molecular Oxygen Limited; Molecular Products Limited - Applicants: Molecular Oxygen Limited - Inventors: Mandy Humphreys; Peter Hutchinson - Web page: https://patentgrep.com/patent/US10118825B2 ## CPC - C01B 13/0296: {Generators releasing in a self-sustaining way pure oxygen from a solid charge, without interaction of it with a fluid nor external heating, e.g. chlorate candles or canisters containing them} - C01B 13/0218: {Chlorate} - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} ## Abstract An oxygen generator comprising a housing and a chemical core within the housing, the chemical core being capable on ignition of producing oxygen by chemical reaction. An ignition apparatus within the housing is for igniting the chemical core, and a collection apparatus within the housing collects oxygen produced by the chemical core. The ignition apparatus comprises an ignition handle accessible from outside the housing, the ignition handle being arranged to be rotatable by hand, and an ignition block disposed within the housing, the ignition block being arranged, when rotated in contact with the chemical core, to ignite the chemical core. A thermal isolator between the ignition handle and the ignition block is arranged to transmit rotational force from the ignition handle to the ignition block. ## Claims ### Claim 1 An oxygen generator comprising: a housing; a chemical core within the housing, the chemical core being capable on ignition of producing oxygen by chemical reaction; an ignition apparatus within the housing for igniting the chemical core; a collection apparatus within the housing for collecting oxygen produced by the chemical core; wherein the ignition apparatus comprises: an ignition handle accessible from outside the housing, the ignition handle being arranged to be rotatable by hand; an ignition block disposed within the housing, the ignition block being arranged, when rotated in contact with the chemical core, to ignite the chemical core; a thermal isolator between the ignition handle and the ignition block, the thermal isolator being arranged to transmit rotational force from the ignition handle to the ignition block. ### Claim 2 (depends on 1) An oxygen generator as claimed in claim 1, wherein the chemical core comprises metal chlorate or perchlorate. ### Claim 3 (depends on 1) An oxygen generator as claimed in claim 1, wherein the chemical core further comprises a catalyst and a fuel. ### Claim 4 (depends on 1) An oxygen generator as claimed in claim 1, wherein the thermal isolator comprises mica. ### Claim 5 (depends on 1) An oxygen generator as claimed in claim 1, wherein a first end of the thermal isolator is positioned within a slot in the ignition handle, and a second end of the thermal insulator opposite the first end is positioned within a slot in thermal block. ### Claim 6 (depends on 5) An oxygen generator as claimed in claim 5, wherein the thermal isolator is a rectangular slab. ### Claim 7 (depends on 1) An oxygen generator as claimed in claim 1, wherein the ignition block comprises a body with an ignition surface arranged to come into contact with the chemical core. ### Claim 8 (depends on 7) An oxygen generator as claimed in claim 7, wherein the ignition surface comprises phosphorus. ### Claim 9 (depends on 7) An oxygen generator as claimed in claim 7, wherein an outer surface of the body of the ignition block has a screw-thread which engages with a corresponding screw-threaded interior surface within the housing, so that rotation of the body of the ignition block in a first direction moves the ignition block towards chemical core. ### Claim 10 (depends on 1) An oxygen generator as claimed in claim 1, further comprising an insulating disk positioned around the thermal isolator between the ignition handle and the ignition block. ### Claim 11 (depends on 10) An oxygen generator as claimed in claim 10, wherein the thermal isolator passes through a hole in the insulating block. ### Claim 12 (depends on 1) An oxygen generator as claimed in claim 1, further comprising a removable locking pin to prevent the ignition handle being rotated. ### Claim 13 (depends on 1) An oxygen generator as claimed in claim 1, wherein the housing comprises a removable cover to prevent access to the ignition handle from outside the housing. ### Claim 14 (depends on 1) An oxygen generator as claimed in claim 1, wherein the collection apparatus comprises a cooling chamber having an inlet through which oxygen produced by the chemical core enters into the cooling chamber, and an outlet through which oxygen in the cooling chamber leaves the cooling chamber, and wherein the interior of the cooling chamber has at least one wall arranged in the path of oxygen flowing from the inlet to the outlet. ### Claim 15 (depends on 14) An oxygen generator as claimed in claim 14, wherein the at least one wall defines a plurality of paths from the inlet to the outlet. ### Claim 16 (depends on 15) An oxygen generator as claimed in claim 15, wherein a first path and second path of the plurality of paths are arranged so that a stream of oxygen flowing along the first path is directed into a stream of oxygen flowing along the second path. ### Claim 17 (depends on 14) An oxygen generator as claimed in claim 14, wherein the walls are arranged concentrically. ### Claim 18 (depends on 14) An oxygen generator as claimed in claim 14, comprising at least a first and a second wall having gaps on opposite sides of the cooling chamber. ### Claim 19 (depends on 14) An oxygen generator as claimed in claim 14, wherein the cooling chamber is formed by a depression in a first cooling chamber piece and a corresponding depression in a second cooling chamber piece. ### Claim 20 (depends on 19) An oxygen generator as claimed in claim 19, wherein the inlet is in the first cooling chamber piece, and the outlet is in the second cooling chamber piece.