US1639780A - Incandescent gas fire - Google Patents

Incandescent gas fire Download PDF

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Publication number
US1639780A
US1639780A US167973A US16797327A US1639780A US 1639780 A US1639780 A US 1639780A US 167973 A US167973 A US 167973A US 16797327 A US16797327 A US 16797327A US 1639780 A US1639780 A US 1639780A
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hollow support
plate
burners
upright
gas
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US167973A
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Mulholland John
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/042—Stoves

Definitions

  • This invention relates to incandescent gas tires, and more particularly to that type ofL gas fire having upstanding radiants assembled in parallel alignment against a back plate of refractory material, such as fireclay, over a series of burners fed with a mixture of gas and air.
  • the principal object of my invention is to provide an improved construction wherein the gas and air mixture is pre-heated before being burnt, thereby increasing the heating efliciency of the iire and decreasing the consumption of gas, and a further ob-l ject of the invention is to avoid back-firing when lighting or extinguishing the fire and to provid-e a fire which will burn quietly.
  • the invention consists of the employment of a hollow support of L-section, the upright portion of said support lying behind the refractory baclr plate and the forwardly-projecting portion of said support carrying the burnersj in combination with an upright induction tube the upper end of which extends into the upright portion of the hollow support to a height above that of the angle between the upright and forward portions thereof.
  • the gas supply nozzle projects into the lower end ofthe induction tube, and the mixture of gas and induced air is projected by the induction tube into the upright portion of the hollow support and passes downwards into the forward portion-of the support to the burners.
  • the radiante and refractory back plate become incandescent and radiate heat, and the radiant heat passing to the rear heats the upright portion of the hollow support and the gaseous mixture circulating therein.
  • waste heat from the refractory back plate is utilized to rais-e the temperature of the gas and the primary air for combustion before it is burnt, and a regenerative effect is obtained, insofar thatrthe temperature of the fire is raised by reason of the preheating of the gaseous mixture by the waste heat.
  • the position of the upper endv of the induction tube ensures that the gaseous mixture does not pass directly to the burners but first circulates through the upright portion of the hollow support. Back-firing is thus prevented, and the fire burns quietly.
  • a is thel L-section hollow support for the fire unit which rests on feet al at each side and comprises a casting with a removable bottom plate o normally secured in position by screws 721 engaging lugs a? on the sides of the casting a.
  • the bottom plate b carries a central induction tube c which passes through said plate and extends up into the upright portion a3 of the hollow supportto a height substantially above that ofthe angle between the upright portion a3 and the forwardlyprojecting portion a4' of the hollow support. rlhe hollow space within the sup-- port extends the full width of the fire.
  • a depending central lug Z22 on the bottom plate is fitted with a bracket CZ; supporting the gas supply nozzle e which is connected by a T-piece jv to the gas supply pipe g.
  • the nozzle e can be adjusted in the bracket d by manipulating the nuts el to vary its position relatively to the mouth of the induction tube c.
  • the burners 7L are formed along the upper face of the forward portion a4 of thehollow support a, and are fitted as usual with perforated diaphragme h1 retained in position f' by a perforated cross bar supported by feet jl resting on the bottom plate b.
  • Above the burners la is disposed a recessed plate lo resting on ribs m projecting from the upper face of the forward portion at of the support, said plate supporting the fire-clay back plate a and the upright radiants y: which are disposed side by side over the burners z, preferably with their side faces in Contact one with another.
  • the radiante p abut against notchedy ribs al across the face of the back-plate a and extend to the top of. but not above, the latter.
  • the forward portion a4 of the hollow support is upwardly inclined as shown, and the back plate n and radiants 7) are rearwardly inclined to direct the major portion of the radiant heat in an upwardly inclined direction.
  • gas from the nozzle e is directed into the induction tube c and induces therethrough a certain amount of air which forms the primary air for combustion and'inixes with the gas, the gaseous mixture being projected into the uprightportion as of the hollow support.
  • the heated mixture passes into the forward portion at of the hollow support and so to the burners la
  • the pre-heating of the gas and primary air raises the temperature of the fire and intensifies the flame, an adequate supply of secondary air passing into the radiants p through the spaces ,around the burners h below the plate k which supports the radiants
  • the quantity of gas necessary to raise the radiants to incandescence throughout their full height is reduced while the radiant heat is increased.
  • Vhat I claim and desire to secure byLetters Patent is 1.-
  • An incandescent gas fire comprising a hollow support of L-section, a refractory back plate in front of the upright portion of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, upstanding radiants disposed over said burners in front of said refractory back plate, an rupright induction tube carried by said hollow support, the upper end of said induction tube extending in-v to the upright portion of said hollow support to a height above that of the angle between the upright and forward portions thereof, and means for supplying gas to said induction tube.
  • An incandescent gas fire comprising a hollow support of L-section, a removable bottom plate normally attached thereto, a refractory back plate in front of the upright portionl of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, a recessed plate supported over said forward portion in spaced relationship to said burners, upstanding radiants disposed over said burners in front of said refractory back plate and supported by said recessed plate, an upright induction tube carried by said removable bottom plate, the upper end of said induction tube extending into the upright portion of said hollow support to a height above that of the angle between the upright and forward portions thereof and means for supplying gas to said induction tube.
  • An incandescent gas fire comprising a hollow -support of L-section, a removable bottom plate normally attached thereto, a refractory back plate in front of the upright portion of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, al recessed plate supported over said forward portion in spaced relationship to said burners, upstanding radiants disposed over said burners in front of said refractory bacl plate and supported by'said recessed plate, an upright induction tube carried by said removable bot,- toni plate, the' upper end of said induction tube extending into the upright portion of said hollow support to a height above that of the angle .between the uprightand forward portions thereof, a lug depending fromv said bottom plate, a nozzle adjust-ably supported by said lug in co-axial alignment with said induction tube, and means for supplying gas to said nozzle.
  • An incandescent gas fire comprising a hollow support of L-section, a reinovablerbottom plate normally attached thereto, a refrac.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Description

Aug. 23, 1927.
J. MULHOLLAND INCANDESCENT GAS FIRE Filed Feb. 14. 1927 3 a/me mum Patented Aug. 23, 1927.
UNITED, skrATl-:sA
JOHN MULHOLLAND, 0F WHITLEY BAY, ENGLAND.
INCANDESCENT GAS FIRE.
`Application filed February 14, 1927, Serial N o. 167,973, and in Great Britain February 25, 1926.
This invention relates to incandescent gas tires, and more particularly to that type ofL gas lire having upstanding radiants assembled in parallel alignment against a back plate of refractory material, such as fireclay, over a series of burners fed with a mixture of gas and air.
The principal object of my invention is to provide an improved construction wherein the gas and air mixture is pre-heated before being burnt, thereby increasing the heating efliciency of the iire and decreasing the consumption of gas, and a further ob-l ject of the invention is to avoid back-firing when lighting or extinguishing the fire and to provid-e a lire which will burn quietly.
The invention consists of the employment of a hollow support of L-section, the upright portion of said support lying behind the refractory baclr plate and the forwardly-projecting portion of said support carrying the burnersj in combination with an upright induction tube the upper end of which extends into the upright portion of the hollow support to a height above that of the angle between the upright and forward portions thereof. The gas supply nozzle projects into the lower end ofthe induction tube, and the mixture of gas and induced air is projected by the induction tube into the upright portion of the hollow support and passes downwards into the forward portion-of the support to the burners. Vhile the lire is burning, the radiante and refractory back plate become incandescent and radiate heat, and the radiant heat passing to the rear heats the upright portion of the hollow support and the gaseous mixture circulating therein. Thus waste heat from the refractory back plate is utilized to rais-e the temperature of the gas and the primary air for combustion before it is burnt, and a regenerative effect is obtained, insofar thatrthe temperature of the fire is raised by reason of the preheating of the gaseous mixture by the waste heat.
The position of the upper endv of the induction tube ensures that the gaseous mixture does not pass directly to the burners but first circulates through the upright portion of the hollow support. Back-firing is thus prevented, and the fire burns quietly.
The accompanying drawings illustrate a fire in accordance with my invention. In the drawings, Figure l is a vertical section and Figure 2 is a plan section on the line X-Y in Fig. l. I
Referring to the drawings, in the examY ple therein illustrated, a is thel L-section hollow support for the fire unit which rests on feet al at each side and comprises a casting with a removable bottom plate o normally secured in position by screws 721 engaging lugs a? on the sides of the casting a. The bottom plate b carries a central induction tube c which passes through said plate and extends up into the upright portion a3 of the hollow supportto a height substantially above that ofthe angle between the upright portion a3 and the forwardlyprojecting portion a4' of the hollow support. rlhe hollow space within the sup-- port extends the full width of the fire. A depending central lug Z22 on the bottom plate is fitted with a bracket CZ; supporting the gas supply nozzle e which is connected by a T-piece jv to the gas supply pipe g. The nozzle e can be adjusted in the bracket d by manipulating the nuts el to vary its position relatively to the mouth of the induction tube c.
The burners 7L are formed along the upper face of the forward portion a4 of thehollow support a, and are fitted as usual with perforated diaphragme h1 retained in position f' by a perforated cross bar supported by feet jl resting on the bottom plate b. Above the burners la is disposed a recessed plate lo resting on ribs m projecting from the upper face of the forward portion at of the support, said plate supporting the lire-clay back plate a and the upright radiants y: which are disposed side by side over the burners z, preferably with their side faces in Contact one with another. The radiante p abut against notchedy ribs al across the face of the back-plate a and extend to the top of. but not above, the latter. i
sie
Preferably the forward portion a4 of the hollow support is upwardly inclined as shown, and the back plate n and radiants 7) are rearwardly inclined to direct the major portion of the radiant heat in an upwardly inclined direction.
It will be seen that gas from the nozzle e is directed into the induction tube c and induces therethrough a certain amount of air which forms the primary air for combustion and'inixes with the gas, the gaseous mixture being projected into the uprightportion as of the hollow support. Vhen the re is burning, heat is radiated by the'radiants p and theback plate n, and the heat passing` to the rear raises the temperature within the upright portion as and heats the gaseous mixture circulating therein. The heated mixture passes into the forward portion at of the hollow support and so to the burners la The pre-heating of the gas and primary air raises the temperature of the fire and intensifies the flame, an adequate supply of secondary air passing into the radiants p through the spaces ,around the burners h below the plate k which supports the radiants The quantity of gas necessary to raise the radiants to incandescence throughout their full height is reduced while the radiant heat is increased.
Vhat I claim and desire to secure byLetters Patent is 1.- An incandescent gas fire comprising a hollow support of L-section, a refractory back plate in front of the upright portion of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, upstanding radiants disposed over said burners in front of said refractory back plate, an rupright induction tube carried by said hollow support, the upper end of said induction tube extending in-v to the upright portion of said hollow support to a height above that of the angle between the upright and forward portions thereof, and means for supplying gas to said induction tube.
2. An incandescent gas fire comprising a hollow support of L-section, a removable bottom plate normally attached thereto, a refractory back plate in front of the upright portionl of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, a recessed plate supported over said forward portion in spaced relationship to said burners, upstanding radiants disposed over said burners in front of said refractory back plate and supported by said recessed plate, an upright induction tube carried by said removable bottom plate, the upper end of said induction tube extending into the upright portion of said hollow support to a height above that of the angle between the upright and forward portions thereof and means for supplying gas to said induction tube. Y f
8. An incandescent gas fire comprising a hollow -support of L-section, a removable bottom plate normally attached thereto, a refractory back plate in front of the upright portion of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, al recessed plate supported over said forward portion in spaced relationship to said burners, upstanding radiants disposed over said burners in front of said refractory bacl plate and supported by'said recessed plate, an upright induction tube carried by said removable bot,- toni plate, the' upper end of said induction tube extending into the upright portion of said hollow support to a height above that of the angle .between the uprightand forward portions thereof, a lug depending fromv said bottom plate, a nozzle adjust-ably supported by said lug in co-axial alignment with said induction tube, and means for supplying gas to said nozzle.
l1. An incandescent gas fire comprising a hollow support of L-section, a reinovablerbottom plate normally attached thereto, a refrac.
tory back plate in front of the upright portion of said hollow support, burners along the upper face of the forwardly-projecting portion of said hollow support, a' recessed plate supported over said forward portion in spaced relationship to said burners, upstanding radiants disposed vover said burners in front of said refractory back plate and supported by said recessed plate, an upright induction tube carried by' saidremovable bottom plate, the upper end ofV said induction tube extending into the upright portion of said hollow support to a height abovev that of the angle between the upright and forward portions thereof, a lug depending from said bottom plate, a nozzle adjustably supported by said lug` iny co-axial alignment with said induction tube, and means for supplying gas to said nozzle, the forward por-y tion of said hollow support being upwardly inclined and the refractory back plate and radiants being rearwardly inclined.
in testimony whereof l aflix my signature.
JOHN MULHOLLAND. y
US167973A 1926-02-25 1927-02-14 Incandescent gas fire Expired - Lifetime US1639780A (en)

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US6340298B1 (en) 1999-12-06 2002-01-22 Mr. Heater Corporation Gas-fired portable unvented infrared heater for recreational and commercial use
US20040106080A1 (en) * 1999-12-06 2004-06-03 Mr. Heater Inc. Gas Fired Portable Unvented Infrared Heater
USD529155S1 (en) 2005-05-16 2006-09-26 Desa Ip, Llc Tower heater
USD533649S1 (en) 2005-05-16 2006-12-12 Deca Ip, Llc Tower heater
US20070277803A1 (en) * 2006-05-17 2007-12-06 David Deng Heater
US20080149872A1 (en) * 2006-12-22 2008-06-26 David Deng Valve assemblies for heating devices
US20080227041A1 (en) * 2007-03-14 2008-09-18 Kirchner Kirk J Log sets and lighting devices therefor
US20080223465A1 (en) * 2007-03-14 2008-09-18 David Deng Fuel selection valve assemblies
US7434447B2 (en) 2006-05-17 2008-10-14 David Deng Oxygen depletion sensor
US7654820B2 (en) 2006-12-22 2010-02-02 David Deng Control valves for heaters and fireplace devices
US20100037884A1 (en) * 2006-05-17 2010-02-18 David Deng Dual fuel heater
US7677236B2 (en) 2006-05-17 2010-03-16 David Deng Heater configured to operate with a first or second fuel
US20100095945A1 (en) * 2007-03-09 2010-04-22 Steve Manning Dual fuel vent free gas heater
US20100139651A1 (en) * 1999-12-06 2010-06-10 Enerco Group, Inc. Gas-fired portable unvented infrared heater
US20100147291A1 (en) * 1999-12-06 2010-06-17 Enerco Group, Inc. Gas-Fired Heater with Environmental Detector
US20100326422A1 (en) * 2009-06-29 2010-12-30 David Deng Heating apparatus with air shutter adjustment
US20110042472A1 (en) * 2009-08-20 2011-02-24 Enerco Group, Inc. Portable Catalytic Heater
US8011920B2 (en) 2006-12-22 2011-09-06 David Deng Valve assemblies for heating devices
US8057219B1 (en) 2007-03-09 2011-11-15 Coprecitec, S.L. Dual fuel vent free gas heater
US8118590B1 (en) 2007-03-09 2012-02-21 Coprecitec, S.L. Dual fuel vent free gas heater
US8152515B2 (en) 2007-03-15 2012-04-10 Continental Appliances Inc Fuel selectable heating devices
US8403661B2 (en) 2007-03-09 2013-03-26 Coprecitec, S.L. Dual fuel heater
US8465277B2 (en) 2009-06-29 2013-06-18 David Deng Heat engine with nozzle
US8899971B2 (en) 2010-08-20 2014-12-02 Coprecitec, S.L. Dual fuel gas heater
US9091431B2 (en) 2012-09-13 2015-07-28 David Deng Dual fuel valve with air shutter adjustment
US9441840B2 (en) 2010-06-09 2016-09-13 David Deng Heating apparatus with fan
US9441833B2 (en) 2013-03-02 2016-09-13 David Deng Heating assembly
US9739389B2 (en) 2011-04-08 2017-08-22 David Deng Heating system
US9752782B2 (en) 2011-10-20 2017-09-05 David Deng Dual fuel heater with selector valve
US9752779B2 (en) 2013-03-02 2017-09-05 David Deng Heating assembly
US9829195B2 (en) 2009-12-14 2017-11-28 David Deng Dual fuel heating source with nozzle
US10073071B2 (en) 2010-06-07 2018-09-11 David Deng Heating system
US10222057B2 (en) 2011-04-08 2019-03-05 David Deng Dual fuel heater with selector valve

Cited By (73)

* Cited by examiner, † Cited by third party
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US6340298B1 (en) 1999-12-06 2002-01-22 Mr. Heater Corporation Gas-fired portable unvented infrared heater for recreational and commercial use
US6648635B2 (en) 1999-12-06 2003-11-18 Mr. Heater Corporation Gas-fired portable unvented infrared heater for recreational and commercial use
US20040106080A1 (en) * 1999-12-06 2004-06-03 Mr. Heater Inc. Gas Fired Portable Unvented Infrared Heater
US6884065B2 (en) 1999-12-06 2005-04-26 Mr. Heater, Inc. Gas fired portable unvented infrared heater
US8434469B2 (en) 1999-12-06 2013-05-07 Enerco Group Inc. Gas-fired portable unvented infrared heater
US20100147291A1 (en) * 1999-12-06 2010-06-17 Enerco Group, Inc. Gas-Fired Heater with Environmental Detector
US20100139651A1 (en) * 1999-12-06 2010-06-10 Enerco Group, Inc. Gas-fired portable unvented infrared heater
US8863736B2 (en) 1999-12-06 2014-10-21 Enerco Group, Inc. Gas-fired heater with environmental detector
US20050257786A1 (en) * 2003-10-02 2005-11-24 Mr. Heater, Inc. Gas fired portable unvented infrared heater
US7300278B2 (en) 2003-10-02 2007-11-27 Mr. Healer, Inc. Gas fired portable unvented infrared heater
USD529155S1 (en) 2005-05-16 2006-09-26 Desa Ip, Llc Tower heater
USD533649S1 (en) 2005-05-16 2006-12-12 Deca Ip, Llc Tower heater
US7434447B2 (en) 2006-05-17 2008-10-14 David Deng Oxygen depletion sensor
US9416977B2 (en) 2006-05-17 2016-08-16 Procom Heating, Inc. Heater configured to operate with a first or second fuel
US7967006B2 (en) 2006-05-17 2011-06-28 David Deng Dual fuel heater
US20100037884A1 (en) * 2006-05-17 2010-02-18 David Deng Dual fuel heater
US7677236B2 (en) 2006-05-17 2010-03-16 David Deng Heater configured to operate with a first or second fuel
US7967007B2 (en) 2006-05-17 2011-06-28 David Deng Heater configured to operate with a first or second fuel
US7730765B2 (en) 2006-05-17 2010-06-08 David Deng Oxygen depletion sensor
US20090139304A1 (en) * 2006-05-17 2009-06-04 David Deng Oxygen depletion sensor
US20070277803A1 (en) * 2006-05-17 2007-12-06 David Deng Heater
US20100170503A1 (en) * 2006-05-17 2010-07-08 David Deng Heater configured to operate with a first or second fuel
US8568136B2 (en) 2006-05-17 2013-10-29 Procom Heating, Inc. Heater configured to operate with a first or second fuel
US8516878B2 (en) 2006-05-17 2013-08-27 Continental Appliances, Inc. Dual fuel heater
US10066838B2 (en) 2006-05-30 2018-09-04 David Deng Dual fuel heating system
US9140457B2 (en) 2006-05-30 2015-09-22 David Deng Dual fuel heating system and air shutter
US9097422B2 (en) 2006-12-22 2015-08-04 Procom Heating, Inc. Control valves for heaters and fireplace devices
US7654820B2 (en) 2006-12-22 2010-02-02 David Deng Control valves for heaters and fireplace devices
US8011920B2 (en) 2006-12-22 2011-09-06 David Deng Valve assemblies for heating devices
US8545216B2 (en) 2006-12-22 2013-10-01 Continental Appliances, Inc. Valve assemblies for heating devices
US8764436B2 (en) 2006-12-22 2014-07-01 Procom Heating, Inc. Valve assemblies for heating devices
US9328922B2 (en) 2006-12-22 2016-05-03 Procom Heating, Inc. Valve assemblies for heating devices
US20080149872A1 (en) * 2006-12-22 2008-06-26 David Deng Valve assemblies for heating devices
US9587830B2 (en) 2006-12-22 2017-03-07 Procom Heating, Inc. Control valves for heaters and fireplace devices
US8297968B2 (en) 2006-12-22 2012-10-30 Continental Appliances, Inc. Pilot assemblies for heating devices
US8317511B2 (en) 2006-12-22 2012-11-27 Continental Appliances, Inc. Control valves for heaters and fireplace devices
USRE46308E1 (en) 2007-03-09 2017-02-14 Coprecitec, S.L. Dual fuel heater
US8403661B2 (en) 2007-03-09 2013-03-26 Coprecitec, S.L. Dual fuel heater
US8118590B1 (en) 2007-03-09 2012-02-21 Coprecitec, S.L. Dual fuel vent free gas heater
US7766006B1 (en) 2007-03-09 2010-08-03 Coprecitec, S.L. Dual fuel vent free gas heater
US20100095945A1 (en) * 2007-03-09 2010-04-22 Steve Manning Dual fuel vent free gas heater
US8777609B2 (en) 2007-03-09 2014-07-15 Coprecitec, S.L. Dual fuel heater
US8061347B2 (en) 2007-03-09 2011-11-22 Coprecitec, S.L. Dual fuel vent free gas heater
US8057219B1 (en) 2007-03-09 2011-11-15 Coprecitec, S.L. Dual fuel vent free gas heater
US20080227041A1 (en) * 2007-03-14 2008-09-18 Kirchner Kirk J Log sets and lighting devices therefor
US20080223465A1 (en) * 2007-03-14 2008-09-18 David Deng Fuel selection valve assemblies
US8241034B2 (en) 2007-03-14 2012-08-14 Continental Appliances Inc. Fuel selection valve assemblies
US9581329B2 (en) 2007-03-14 2017-02-28 Procom Heating, Inc. Gas-fueled heater
US9200801B2 (en) 2007-03-14 2015-12-01 Procom Heating, Inc. Fuel selection valve assemblies
US8152515B2 (en) 2007-03-15 2012-04-10 Continental Appliances Inc Fuel selectable heating devices
US20110108015A1 (en) * 2008-12-12 2011-05-12 Enerco Group, Inc. Gas-Fired Heater with Carbon Dioxide Detector
US8893707B2 (en) 2008-12-12 2014-11-25 Enerco Group, Inc. Gas-fired heater with carbon dioxide detector
US9267708B2 (en) 2008-12-12 2016-02-23 Enerco Group, Inc. Gas-fired heater with carbon dioxide detector
US8347875B2 (en) 2008-12-12 2013-01-08 Enerco Group, Inc. Gas-fired heater with carbon dioxide detector
US8517718B2 (en) 2009-06-29 2013-08-27 David Deng Dual fuel heating source
US8757202B2 (en) 2009-06-29 2014-06-24 David Deng Dual fuel heating source
US8757139B2 (en) 2009-06-29 2014-06-24 David Deng Dual fuel heating system and air shutter
US8465277B2 (en) 2009-06-29 2013-06-18 David Deng Heat engine with nozzle
US8506290B2 (en) 2009-06-29 2013-08-13 David Deng Heating apparatus with air shutter adjustment
US20100326422A1 (en) * 2009-06-29 2010-12-30 David Deng Heating apparatus with air shutter adjustment
US9222682B2 (en) 2009-08-20 2015-12-29 Enerco Group, Inc. Portable catalytic heater
US20110042472A1 (en) * 2009-08-20 2011-02-24 Enerco Group, Inc. Portable Catalytic Heater
US8684276B2 (en) 2009-08-20 2014-04-01 Enerco Group, Inc. Portable catalytic heater
US9829195B2 (en) 2009-12-14 2017-11-28 David Deng Dual fuel heating source with nozzle
US10073071B2 (en) 2010-06-07 2018-09-11 David Deng Heating system
US9441840B2 (en) 2010-06-09 2016-09-13 David Deng Heating apparatus with fan
US8899971B2 (en) 2010-08-20 2014-12-02 Coprecitec, S.L. Dual fuel gas heater
US9739389B2 (en) 2011-04-08 2017-08-22 David Deng Heating system
US10222057B2 (en) 2011-04-08 2019-03-05 David Deng Dual fuel heater with selector valve
US9752782B2 (en) 2011-10-20 2017-09-05 David Deng Dual fuel heater with selector valve
US9091431B2 (en) 2012-09-13 2015-07-28 David Deng Dual fuel valve with air shutter adjustment
US9752779B2 (en) 2013-03-02 2017-09-05 David Deng Heating assembly
US9441833B2 (en) 2013-03-02 2016-09-13 David Deng Heating assembly

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