US3590806A - Portable l. p. gas space heater - Google Patents

Portable l. p. gas space heater Download PDF

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US3590806A
US3590806A US852015A US3590806DA US3590806A US 3590806 A US3590806 A US 3590806A US 852015 A US852015 A US 852015A US 3590806D A US3590806D A US 3590806DA US 3590806 A US3590806 A US 3590806A
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housing
gas
heating element
heater
control valve
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US852015A
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Joseph K Locke
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Newell Companies Inc
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Bernz O Matic Corp
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Assigned to NEWELL COMPANIES, INC., A DE CORP. reassignment NEWELL COMPANIES, INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BERNZ O MATIC CORPORATION A NY CORP
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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
    • 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
    • F24C3/14—Stoves or ranges for gaseous fuels with special adaptation for travelling, e.g. collapsible

Definitions

  • the catalytlc umt IS a porous pad which allows the gas to seep [52] US. Cl 126/92, through and u on contact with the air burns the same on its 43l/32 .4 outside surface. Since no premixing with air is required the [5 ll Int. Cl F241: 3/04, b k space b hind the catalytic pad in the heating element is F2 /1 directly connected to one of the two L. P. cartridges in the [50] Field 0! Search 126/92, 92 hou ing or the carrying case. To permit compact construction,
  • a flexible gas line is used so that the L. P. cylinder can be connected thereto external of the housing.
  • the gas line attaches [56] Rekmmes Cited to the cylinder with a finger adjustable regulator valve which UNITED STATES PATENTS valve, when mounted on the cartridge, is designed to have its 3,l 79, l 56 4/1965 Weiss et 43l/329 control knob extend through the housing on the top portion so 3,200,809 8/ l 965 Suchowolec I 26/92 B that it is readably accessible.
  • the rear wall of the carrying case 3,219,025 I 1/1965 Webster l26/92 B is hinged to open so that the gas cartridges, one of which is a 3,245,459 4/ l 966 Keith 43 l [329 spare, are accessible and can be readily exchanged.
  • the propane heater of this invention employs a planer catalytic radiant heating pad that effects relatively slow catalytic combustion of the propane gas on the surface of the pad. It can be considered in a sense flameless and is quite easy to operate. The flow of gas need only be started through the pad and the lower portion of it heated slightly, as with a match, to start the catalytic reaction.
  • the overall design of the present heater is quire simple and attractive.
  • the housing is designed to contain two standard disposable L. P. gas cartridges, one of which is connected to the backside of the catalytic heating element through a control valve-regulator and a flexible connecting line.
  • the control knob of the regulator extends through the housing and is readily accessible to finger tip control.
  • the regulator valve is a subject matter of a copending application entitled "Pressure Regulator Valve for L. P. Cartridges" in the name oflrving H. Stenner, filed simultaneously herewith and assigned to a common assignee.
  • FIG. 1 is a perspective view ofthe heater from the front
  • FIG. 2 is a top plan view of the heater
  • FIG. 3 is a perspective view of the heater from the backside showing the access door partly open
  • FIG. 4 is a cross-sectional view 'of the means to attach the L. P. gasline to the catalytic unit.
  • the heater comprises a carrying case It) or housing that has an adjustable handle ll attached to the sides of the housing. Tightening knobs I2 permit the handle to be placed in the position shown in FIG. I for carrying, or in the position shown in FIG. 3 to stabilize the heater when it is resting on a surface.
  • a circular heating element is affixed to the front of the carrying case by means of bracket I6.
  • the heating element comprises an enclosed pan 11 that makes a gastight seal about and retains catalytic pad l9.
  • the catalytic element or pad 19 is porous and comprises an aluminum sil icate impregnated with a platinum catalyst, usually by spraying the catalytic solution thereon.
  • a preferred catalytic pad is sold by Ernest lnc., Independence, Kansas.
  • a guard 20 clips over the heating element to prevent body contact therewith or the accidental contacting of flammable material.
  • the underside of the heating element 15, i.e., pan I7 is connected to the propane gas supply by a conduit 25 which is attached to pan 1! by nut 26 and extends through to the inside of housing [0.
  • a collar 24 holds an orifice 27 at the outlet, which orifice helps to control the gas flow.
  • Conduit 25 is attached to a flexible hose 28 which ends in a regulator valve 29 having a control knob 30.
  • the length of flexible line 28 is suffcient to permit regulator 29 to be attached to the, neck of a disposable L. P. gas cartridge by screwing the two together outside of the carrying case.
  • the cartridge with the regulator attached is held within the cabinet by clip 31 with the control knob 30 of the regulator extending through the housing as shown in FIGS. 1 and 2.
  • a reserve cartridge 33 shown in outline, is retained within the housing by clip 32.
  • the backwall I4 of the housing is hinged so that it can be opened to permit access to the L. P. gas cartridges and the regulator valve 29.
  • This valve has an activation rod or plunger so that when it is connected to the cartridge it will open the valve therein and draw gas.
  • Knob 30 is then rotated to the on position.
  • the type of valve shown has a control but ton 30a in the knob which when depressed overrides the regulator valve and holds it in the full open position so that it is possible to flood pan [7 with propane gas. After this flooding,
  • control valve 30 a match or the like is held to the lower portion of the catalytic pad to initiate the catalytic combustion which then spreads upwardly and over the whole pad.
  • the rate of gas consumption and heating is then adjusted to the desired level by rotation of control valve 30.
  • a portable L.P. gas radiant heater comprising:
  • a rectilinear housing having a carrying handle and a hole adapted to receive the control knob of a valve and adapted to detachably retain inside thereof two upright L. P. gas cartridges side-by-side;
  • a pressure-regulator and control valve means within said housing and adapted to be directly mounted to the neck of an L.P. gas cartridge and to draw gas therefrom, said control valve having a finger-adjustable control knob adapted to extend through the hole in said housing when mounted on an L.P. gas cartridge therein;
  • a generally planer radiant heating element having a guard thereover to prevent body contact therewith and mounted externally on said housing with the plane thereof being parallel to the plane defined by the longitudinal axis of said two L.P. gas cartridges, said heating element comprising a porous catalytic radiant heating pad and being adapted to pass gas therethrough without premixing with air;
  • heating element is circular and comprises a platinum impregnated aluminum silicate, and wherein said guard makes a snap fit therewith.

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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)

Abstract

An attractive lightweight portable L. P. gas space heater comprises a boxlike rectangular housing having space for two disposable L. P. gas cartridges. A circular catalytic heating element is mounted on the front of the heater. The catalytic unit is a porous pad which allows the gas to seep through and upon contact with the air burns the same on its outside surface. Since no premixing with air is required the back space behind the catalytic pad in the heating element is directly connected to one of the two L. P. cartridges in the housing or the carrying case. To permit compact construction, a flexible gas line is used so that the L. P. cylinder can be connected thereto external of the housing. The gas line attaches to the cylinder with a finger adjustable regulator valve which valve, when mounted on the cartridge, is designed to have its control knob extend through the housing on the top portion so that it is readably accessible. The rear wall of the carrying case is hinged to open so that the gas cartridges, one of which is a spare, are accessible and can be readily exchanged.

Description

I United States Patent I l I l 3,590,806
[72] Inventor Joseph K. Locke 3,485,230 l2/l969 Harrington et al i, l26/92 B De Kalb Primary ExaminerCharlcs J. Myhre [2] 1 Appl. No. 852,015 Attorney-Burgess Dinklage & Sprung [22] Filed Aug. 2], I969 [45] Patented July 6. 1971 i Assign acmmlk Corpomuo" ABSTRACT: An attractive lightweight portable L. P. gas space heater comprises a boxlike rectangular housing having space for two disposable L. P. gas cartridges, A circular cata- [54] l ril L p GAS SPACE EATER lytic heating element is mounted on the front of the heater.
ms, 4 Drawlng Figs.
The catalytlc umt IS a porous pad which allows the gas to seep [52] US. Cl 126/92, through and u on contact with the air burns the same on its 43l/32 .4 outside surface. Since no premixing with air is required the [5 ll Int. Cl F241: 3/04, b k space b hind the catalytic pad in the heating element is F2 /1 directly connected to one of the two L. P. cartridges in the [50] Field 0! Search 126/92, 92 hou ing or the carrying case. To permit compact construction,
43 329, 344 a flexible gas line is used so that the L. P. cylinder can be connected thereto external of the housing. The gas line attaches [56] Rekmmes Cited to the cylinder with a finger adjustable regulator valve which UNITED STATES PATENTS valve, when mounted on the cartridge, is designed to have its 3,l 79, l 56 4/1965 Weiss et 43l/329 control knob extend through the housing on the top portion so 3,200,809 8/ l 965 Suchowolec I 26/92 B that it is readably accessible. The rear wall of the carrying case 3,219,025 I 1/1965 Webster l26/92 B is hinged to open so that the gas cartridges, one of which is a 3,245,459 4/ l 966 Keith 43 l [329 spare, are accessible and can be readily exchanged.
PORTABLE L. P. GAS SPACE HEATER DESCRIPTION There are many instances where a small portable radiant heater is useful such as for camping, hunting as in duck blinds, construction work, spectator sports such as football, in ice fishing shacks and in many such other applications. It is of course desirable that such a heater be simple to operate, safe adjustable and have a relatively long operating time.
The present invention meets these objectives. The propane heater of this invention employs a planer catalytic radiant heating pad that effects relatively slow catalytic combustion of the propane gas on the surface of the pad. It can be considered in a sense flameless and is quite easy to operate. The flow of gas need only be started through the pad and the lower portion of it heated slightly, as with a match, to start the catalytic reaction.
The overall design of the present heater is quire simple and attractive. The housing is designed to contain two standard disposable L. P. gas cartridges, one of which is connected to the backside of the catalytic heating element through a control valve-regulator and a flexible connecting line. The control knob of the regulator extends through the housing and is readily accessible to finger tip control.
The regulator valve is a subject matter of a copending application entitled "Pressure Regulator Valve for L. P. Cartridges" in the name oflrving H. Stenner, filed simultaneously herewith and assigned to a common assignee.
DRAWINGS FIG. 1 is a perspective view ofthe heater from the front;
FIG. 2 is a top plan view of the heater;
FIG. 3 is a perspective view of the heater from the backside showing the access door partly open, and
FIG. 4 is a cross-sectional view 'of the means to attach the L. P. gasline to the catalytic unit.
DESCRIPTION The heater comprises a carrying case It) or housing that has an adjustable handle ll attached to the sides of the housing. Tightening knobs I2 permit the handle to be placed in the position shown in FIG. I for carrying, or in the position shown in FIG. 3 to stabilize the heater when it is resting on a surface.
A circular heating element, generally indicated at I5, is affixed to the front of the carrying case by means of bracket I6. The heating element comprises an enclosed pan 11 that makes a gastight seal about and retains catalytic pad l9. The catalytic element or pad 19 is porous and comprises an aluminum sil icate impregnated with a platinum catalyst, usually by spraying the catalytic solution thereon. A preferred catalytic pad is sold by Ernest lnc., Independence, Kansas. A guard 20 clips over the heating element to prevent body contact therewith or the accidental contacting of flammable material.
The underside of the heating element 15, i.e., pan I7 is connected to the propane gas supply by a conduit 25 which is attached to pan 1! by nut 26 and extends through to the inside of housing [0. A collar 24 holds an orifice 27 at the outlet, which orifice helps to control the gas flow. Conduit 25 is attached to a flexible hose 28 which ends in a regulator valve 29 having a control knob 30. The length of flexible line 28 is suffcient to permit regulator 29 to be attached to the, neck of a disposable L. P. gas cartridge by screwing the two together outside of the carrying case. The cartridge with the regulator attached is held within the cabinet by clip 31 with the control knob 30 of the regulator extending through the housing as shown in FIGS. 1 and 2. A reserve cartridge 33, shown in outline, is retained within the housing by clip 32.
The backwall I4 of the housing is hinged so that it can be opened to permit access to the L. P. gas cartridges and the regulator valve 29. This valve has an activation rod or plunger so that when it is connected to the cartridge it will open the valve therein and draw gas.
To operate the device, the gas cartridge IS connected to regulator valve 29, the knob of the valve is inserted through hole 34 in the housing and the cartridge is clipped in place within retaining clip 3]. A metal finger I8 engages the body of valve 29 to prevent rotation thereof. Knob 30 is then rotated to the on position. The type of valve shown has a control but ton 30a in the knob which when depressed overrides the regulator valve and holds it in the full open position so that it is possible to flood pan [7 with propane gas. After this flooding,
a match or the like is held to the lower portion of the catalytic pad to initiate the catalytic combustion which then spreads upwardly and over the whole pad. The rate of gas consumption and heating is then adjusted to the desired level by rotation of control valve 30.
With the type of catalytic heating pad used, a temperature of about 235 F. is necessary in order to initiate the catalytic combustion. This type of pad tends to absorb moisture in storage and it is for this reason that the override control button 304: was found to be necessary. This feature permits ready ignition of the heater even under quite adverse conditions.
I claim:
I. A portable L.P. gas radiant heater comprising:
a. a rectilinear housing having a carrying handle and a hole adapted to receive the control knob of a valve and adapted to detachably retain inside thereof two upright L. P. gas cartridges side-by-side;
. a pressure-regulator and control valve means within said housing and adapted to be directly mounted to the neck of an L.P. gas cartridge and to draw gas therefrom, said control valve having a finger-adjustable control knob adapted to extend through the hole in said housing when mounted on an L.P. gas cartridge therein;
c. a generally planer radiant heating element having a guard thereover to prevent body contact therewith and mounted externally on said housing with the plane thereof being parallel to the plane defined by the longitudinal axis of said two L.P. gas cartridges, said heating element comprising a porous catalytic radiant heating pad and being adapted to pass gas therethrough without premixing with air; and
d. a flexible gasline connecting said control valve to said heating element, said gas line passing through and being mounted on said housing beneath said heating element and having a length and flexibility sufficient to permit removal of said control valve from said housing and the mounting of the same on one of said two L. P. gas cartridges:
e. the rear wall of said housing opposite from the wall mounting said heating element being detachably mounted to permit access to the interior of said housing.
2. The heater of claim 1 wherein said rear wall is hinged to said housing along one edge thereof.
3. The heater of claim 1 wherein said heating element is circular and comprises a platinum impregnated aluminum silicate, and wherein said guard makes a snap fit therewith.
4. The heater of claim I wherein said pressure-regulator control valve has associated therewith a manually operated control for positioning said valve at the full open position to permit flooding of said heating element with gas.
5. The heater of claim 1 wherein the hole in said housing has associated therewith means to prevent said control valve means from rotating.
Dedication 3,590,806.J0seph K. Locke, De Kalb, I11. PORTABLE L.P. GAS SPACE HEATER. Patent dated Jul 6, 1971. Dedication filed Feb. 4, 1972, by the assignee, Bernzamam'c wporation. Hereby dedicates to the Public the entire term of said patent.
[Ofiicial Gazette July 18, 1.97%.]

Claims (5)

1. A portable L.P. gas radiant heater comprising: a. a rectilinear housing having a carrying handle and a hole adapted to receive the control knob of a valve and adapted to detachably retain inside thereof two upright L. P. gas cartridges side-by-side; b. a pressure-regulator and control valve means within said housing and adapted to be directly mounted to the neck of an L.P. gas cartridge and to draw gas therefrom, said control valve having a finger-adjustable control knob adapted to extend through the hole in said housing when mounted on an L.P. gas cartridge therein; c. a generally planer radiant heating element having a guard thereover to prevent body contact therewith and mounted externally on said housing with the plane thereof being parallel to the plane defined by the longitudinal axis of said two L.P. gas cartridges, said heating element comprising a porous catalytic radiant heating pad and being adapted to pass gas therethrough without premixing with air; and d. a flexible gasline connecting said control valve to said heating element, said gas line passing through and being mounted on said housing beneath said heating element anD having a length and flexibility sufficient to permit removal of said control valve from said housing and the mounting of the same on one of said two L. P. gas cartridges: e. the rear wall of said housing opposite from the wall mounting said heating element being detachably mounted to permit access to the interior of said housing.
2. The heater of claim 1 wherein said rear wall is hinged to said housing along one edge thereof.
3. The heater of claim 1 wherein said heating element is circular and comprises a platinum impregnated aluminum silicate, and wherein said guard makes a snap fit therewith.
4. The heater of claim 1 wherein said pressure-regulator control valve has associated therewith a manually operated control for positioning said valve at the full open position to permit flooding of said heating element with gas.
5. The heater of claim 1 wherein the hole in said housing has associated therewith means to prevent said control valve means from rotating.
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Cited By (46)

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US3824064A (en) * 1973-05-25 1974-07-16 R Bratko Infra-red process burner
US3861853A (en) * 1972-12-29 1975-01-21 Prototech Co Method of reducing carbon monoxide formation in catalytic heaters and burners and improved catalytic structure for use therewith
US4766877A (en) * 1987-09-30 1988-08-30 Thermal Systems, Inc. Catalytic space heater
US5213075A (en) * 1990-08-10 1993-05-25 Weber-Stephen Products Co. Igniter for charcoal grill
US5665314A (en) * 1994-10-11 1997-09-09 Hewlett-Packard Company Temperature control in a portable analytical instrument
US5993192A (en) * 1997-09-16 1999-11-30 Regents Of The University Of Minnesota High heat flux catalytic radiant burner
US6295979B1 (en) 1999-07-22 2001-10-02 All Day Outdoor Products Group Inc. Pedestal mount personal heater
US6340298B1 (en) * 1999-12-06 2002-01-22 Mr. Heater Corporation Gas-fired portable unvented infrared heater for recreational and commercial use
US6619281B2 (en) 2000-09-15 2003-09-16 Cfm-Rmc International, A Division Of The Vermont Castings Majestics Products Company Miniature patio heater
US20040106080A1 (en) * 1999-12-06 2004-06-03 Mr. Heater Inc. Gas Fired Portable Unvented Infrared Heater
US6843244B2 (en) 2000-09-15 2005-01-18 Vermont Castings Majestic Products Company Portable heater
US20050208448A1 (en) * 2004-03-17 2005-09-22 Bachinski Thomas J Gas light systems and methods of operation
US20070272227A1 (en) * 2004-03-04 2007-11-29 Bsh Bosch Und Siemens Hausgerate Gmbh Gas Heating Device
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
US20100035196A1 (en) * 2006-12-22 2010-02-11 David Deng Pilot assemblies for heating 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
US20100330513A1 (en) * 2009-06-29 2010-12-30 David Deng Dual fuel heating source
US20110042472A1 (en) * 2009-08-20 2011-02-24 Enerco Group, Inc. Portable Catalytic Heater
US20110214449A1 (en) * 2010-03-04 2011-09-08 David Deng Refrigerator
US8057219B1 (en) 2007-03-09 2011-11-15 Coprecitec, S.L. Dual fuel vent free gas heater
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US20120237886A1 (en) * 2011-03-16 2012-09-20 Casson Jean-Jacques Portable Catalytic Drying Apparatus
US8403661B2 (en) 2007-03-09 2013-03-26 Coprecitec, S.L. Dual fuel heater
US8506290B2 (en) 2009-06-29 2013-08-13 David Deng Heating apparatus with air shutter adjustment
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
US9441833B2 (en) 2013-03-02 2016-09-13 David Deng Heating assembly
US9739389B2 (en) 2011-04-08 2017-08-22 David Deng Heating system
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US9752782B2 (en) 2011-10-20 2017-09-05 David Deng Dual fuel heater with selector valve
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
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US3200809A (en) * 1963-11-04 1965-08-17 Turner Corp Sportsman's heater assembly
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Cited By (87)

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Publication number Priority date Publication date Assignee Title
US3861853A (en) * 1972-12-29 1975-01-21 Prototech Co Method of reducing carbon monoxide formation in catalytic heaters and burners and improved catalytic structure for use therewith
US3824064A (en) * 1973-05-25 1974-07-16 R Bratko Infra-red process burner
US4766877A (en) * 1987-09-30 1988-08-30 Thermal Systems, Inc. Catalytic space heater
US5213075A (en) * 1990-08-10 1993-05-25 Weber-Stephen Products Co. Igniter for charcoal grill
US5665314A (en) * 1994-10-11 1997-09-09 Hewlett-Packard Company Temperature control in a portable analytical instrument
US5993192A (en) * 1997-09-16 1999-11-30 Regents Of The University Of Minnesota High heat flux catalytic radiant burner
US6295979B1 (en) 1999-07-22 2001-10-02 All Day Outdoor Products Group Inc. Pedestal mount personal heater
US8434469B2 (en) 1999-12-06 2013-05-07 Enerco Group Inc. Gas-fired portable unvented infrared heater
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
US8863736B2 (en) 1999-12-06 2014-10-21 Enerco Group, Inc. Gas-fired heater with environmental detector
US20040106080A1 (en) * 1999-12-06 2004-06-03 Mr. Heater Inc. Gas Fired Portable Unvented Infrared 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
US6884065B2 (en) 1999-12-06 2005-04-26 Mr. Heater, Inc. Gas fired portable unvented infrared heater
US6792937B2 (en) 2000-09-15 2004-09-21 Cfm-Rmc International, A Division Of The Vermont Castings Majestic Products Company Miniature patio heater
US6843244B2 (en) 2000-09-15 2005-01-18 Vermont Castings Majestic Products Company Portable heater
US6619281B2 (en) 2000-09-15 2003-09-16 Cfm-Rmc International, A Division Of The Vermont Castings Majestics Products Company Miniature patio heater
US6742814B2 (en) 2000-09-15 2004-06-01 Cfm-Rmc International, A Division Of The Vermont Castings Majestic Products Company Miniature patio heater
US20050257786A1 (en) * 2003-10-02 2005-11-24 Mr. Heater, Inc. Gas fired portable unvented infrared heater
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