# US 9,752,782 B2 · Dual fuel heater with selector valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,782 B2 - Document ID: US9752782B2 - Status: Granted - Kind: B2 - Application number: 14/578,088 - Filed: 2014-12-19 - Published: 2015-08-27 - Granted: 2017-09-05 - Earliest claimed: 2011-10-20 - Applicants: David Deng - Inventors: David Deng - Web page: https://patentgrep.com/patent/US9752782B2 ## CPC - F24C 1/04: simultaneously - F24C 3/002: {Stoves} - F16K 11/10: with two or more closure members not moving as a unit - F23C 1/08: liquid and gaseous fuel - G05D 16/0661: {characterised by the loading mechanisms of the membrane} - F23N 2237/08: two or more different types of fuel simultaneously - Y10T 137/87249: Multiple inlet with multiple outlet - Y10T 137/87917: Flow path with serial valves and/or closures - Y10T 137/87981: Common actuator - F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D) - G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES - F23N: REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B1/187) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A heater assembly can be used with a gas appliance. The gas appliance can be a dual fuel appliance for use with one of a first fuel type or a second fuel type different than the first. The heater assembly can include at least one pressure regulator, a housing, and an actuation member. The housing has a first fuel hook-up for connecting the first fuel type to the heater assembly, a second fuel hook-up for connecting the second fuel type to the heater assembly, and an internal valve. The actuation member can control the position of the internal valve based on whether the first or the second fuel hook-up is used. ## Claims ### Claim 1 A heater assembly for use with one of a first fuel type or a second fuel type different than the first, the heater assembly comprising: a housing having first and second fuel hook-ups, the first fuel hook-up for connecting the first fuel type to the heater assembly and the second hook-up for connecting the second fuel type to the heater assembly; a first hook-up valve positioned within the first fuel hook-up in a closed position to prevent fuel flow through the first fuel hook-up, the first hook-up valve configured to open when a fuel source connector of the first fuel type is coupled to the first fuel hook-up; a second hook-up valve positioned within the second fuel hook-up in a closed position to prevent fuel flow through the second fuel hook-up, the second hook-up valve configured to open when a fuel source connector of the second fuel type is coupled to the second fuel hook-up; a first pressure regulator downstream of and in fluid communication with the first fuel hook-up, the first pressure regulator configured to regulate a fuel flow therethrough within a first predetermined range; a second pressure regulator downstream of and in fluid communication with the second fuel hook-up, the second pressure regulator configured to regulate a fuel flow therethrough within a second predetermined range different from the first predetermined range; a control valve comprising first and second solenoid valves; and first and second selectable valves within the housing; wherein the first and second solenoid valves are positioned in a flowpath downstream of the first and second pressure regulators, the first selectable valve being downstream of the first solenoid valve and the second selectable valve being downstream of both the first and second solenoid valves. ### Claim 2 (depends on 1) The heater assembly of claim 1, further comprising a nozzle, wherein the second selectable valve directs fluid flow to the nozzle. ### Claim 3 (depends on 2) The heater assembly of claim 2, further comprising an oxygen depletion sensor (ODS), wherein the first selectable valve directs fluid flow to the ODS. ### Claim 4 (depends on 3) The heater assembly of claim 3, further comprising a burner, wherein the nozzle directs fuel to the burner for combustion. ### Claim 5 (depends on 1) The heater assembly of claim 1, wherein the first and second hook-up valves each comprise a spring configured such that advancing the respective fuel source connector of the first fuel type or the second fuel type into the respective first or second fuel hook-up compresses the spring and forces the respective first or second hook-up valve open. ### Claim 6 (depends on 1) The heater assembly of claim 1, wherein the housing further defining a first outlet, wherein fluid flowing from the first and second pressure regulators flows out of the housing through the first outlet, the first outlet being the only outlet that receives flow directly from the first and second pressure regulators.