US3267255A - Forced air electric baseboard heater - Google Patents

Forced air electric baseboard heater Download PDF

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Publication number
US3267255A
US3267255A US341215A US34121564A US3267255A US 3267255 A US3267255 A US 3267255A US 341215 A US341215 A US 341215A US 34121564 A US34121564 A US 34121564A US 3267255 A US3267255 A US 3267255A
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United States
Prior art keywords
duct
air
fan
housing
heater
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Expired - Lifetime
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US341215A
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English (en)
Inventor
Albert E Schulz
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General Electric Co
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General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US341215A priority Critical patent/US3267255A/en
Priority to GB52340/64A priority patent/GB1088030A/en
Priority to CH7165A priority patent/CH426158A/de
Priority to DE1540782A priority patent/DE1540782C3/de
Priority to ES0308091A priority patent/ES308091A1/es
Priority to NL6500961A priority patent/NL6500961A/xx
Priority to JP1965022784U priority patent/JPS44819Y1/ja
Application granted granted Critical
Publication of US3267255A publication Critical patent/US3267255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
    • F24H3/0417—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems portable or mobile

Definitions

  • This invention relates to electric heating apparatus and more specifically to a forced air, electric baseboard heater, i.e., a heater adapted to be positioned at the base of a wall.
  • electric baseboard heaters So as to be relatively unobtrusive within a room, it is desirable that electric baseboard heaters have a long, low and shallow shape.
  • the majority of electric baseboard heaters being sold were of the non-forced air type and relied primarily on convection to obtain circulation of the heated air.
  • One major disadvantage of such heaters is that the heat naturally tends to move directly upwardly and the occupants of the room do not feel the benefit of the heat unless they are standing directly over the heater or until the temperature of the entire room has been raised.- Incorporating a fan in the heater to direct the air horizontally away from the heater in a direction parallel to the floor tends to alleviate this problem.
  • a forced air electric heater having a horizontally elongated housing with a centrifugal fan and electric motor therefor mounted in one end of the housing.
  • a fan scroll is positioned around the fan; and a horizontally, elongated duct is located in the housing and connected to the scroll air outlet.
  • Within the duct there is positioned an elongated electric heating element.
  • Elongated air outlet means are formed in the housing adjacent to and parallel with the duct and a plurality of spaced openings are formed in the duct and positioned in direct communication withthe housing air outlet. These openings are sized and arranged with relation to the size of the duct, the characteristics of the heater and the output of the fan to obtain a relatively even heat output throughout the length of the elongated housing outlet.
  • FIG. 1 is a front partially sectionalized, elevational view of the baseboard heater of the invention
  • FIG. 2 is a perspective View of the heater showing the entering and leaving air flow
  • FIG. 3 is a top cross-sectional view along lines 3-3 of FIG. 1;
  • FIG. 4 is a cross-sectional view of the heater along line 4--4 of FIG. 1;
  • FIG. 5 is a perspective view of the heater heating element and associated structure.
  • the heater shown therein includes an external housing having a rear wall 12,
  • an elongated rectangular air outlet 31 In the upper portion 26 of front wall 16, there is formed an elongated rectangular air outlet 31. To prevent objects from being inserted into the interior of the housing, the outlet 31 is covered by a protective grill 32.
  • the heater So that the heater will be relatively unobtrusive, it is given an elongated shallow shape to conveniently fit adjacent the baseboard of a room.
  • a pair of front legs 33 provide additional stability to the heater and the protective tips 34 on the legs in conjunction with the insert supports 35 prevent the metal housing from scratching the surface upon which the heater rests.
  • a handle 36 at tached to the top wall 18 enhances the portability of the heater by allowing it to be easily lifted and carried to the desired location.
  • a motor 38 driving a centrifugal fan 40 is positioned within one end of the heater housing 10. More specifically, the motor is attached to a supporting strap 42 mounted on an orifice plate 44, which is, in turn, secured to a fan scroll 46 surrounding the fan 40. Scroll 46 is welded or otherwise secured to rear wall 12 through scroll flange 46a. Orifice plate 44 is provided with a central opening through which air may flow past the motor into the fan, and scroll 46 has an air outlet section 46b tangentially positioned with respect to the fan in the upper portion of the housing.
  • an elongated duct or tunnel 48 positioned in the upper portion of housing 10 with one end in direct communication with scroll outlet 46b.
  • the duct 48 has a rectangular cross-section formed by upper and lower walls 50 .and 52, a portion of the rear wall 12, and an apertured front wall 54.
  • Walls 50 and 52 are each provided with a right angle flange 50a and 52a to facilitate securing the walls to rear wall 12.
  • Front wall 54 which is spaced slightly from grill 32, has a shallow U-shaped cross-section adapted to fit partially over walls 50 and 52.
  • a plurality of lugs 56 integrally formed with walls 50 and 52 extend through mating slots 58 formed in front wall 54 to align the front .wall with respect to the upper and lower walls 50 and 52; and by deforming the lugs, the front wall may be securely attached to the upper and lower walls.
  • Integrally formed with the front wall 54 is .an end wall 60 also having a pair of slots for mating with lugs extending from the upper and lower walls 50 and 52.
  • Front wall 54 is provided with a plurality of holes or apertures 62 which permit the air from the fan to flow out of duct 48. Since the duct is completely closed except for the apertures in the front wall and except for the intake end of the duct connected to the scroll outlet 46b, all .air is directed forwardly through the apertures 62 in a direction parallel to the floor or other surface upon which the heater is supported. The combined cross-sectional area of the apertures 62 is related to the air output of the fan in a manner such that there is .a slight pressure build up within duct 48. Hence, the duct maybe considered as a plenum chamber for the fan. As a result of the pressure'build up within the plenum chamber, the
  • an elongated heating coil 64 which extends throughout substantially the entire length of the duct.
  • the ends of the heating coil 64 are attached to suitable lead wires (not shown) which are in turn secured to supports 66 and 68 made of ceramic or other insulating material. Since the coil is resilient and relatively stiff, it may be placed under axial tension so that it is supported by simply the two end supports 66 and 68. However, to prevent possible sagging of the wire during heating, there are provided intermediate ceramic supports or guides 69, 70 and 71. As best seen in FIG. 5, each of these intermediate supports is provided with a central enlarged aperture through which the heating coil extends. The coil is only loosely positioned within the intermediate supports so that it is free to move axially.
  • all of the ceramic supports have upper portions which extend through openings in the duct bottom Wall 52 and are secured in this position by a retaining wire 72, which cooperates with notches formed in the base of each support to hold the bases in contact with the lower surface of wall 52.
  • the retaining wire is held in position by ex- [tending through deformed portions in wall 52.
  • a unique advantage of the heating element arrangement is that the coil is somewhat self adjusting. For example, in the event a portion of the coil should overheat due, for example, to partial blockage of the air flow, the overheated portion will lose some of its strength and resiliency and the tension on the coil will cause the overheated portion to be axially elongated. This reduction of the quantity of heated wire in that area natural ly reduces the heat concentration in that area, thus automatically tending to alleviate the difliculty.
  • the air enters the heater through inlet ports 30 and is drawn through the orifice in orifice plate 44 into the fan; the fan output is forced through the apertures 62 in duct 48 and out of the heater through elongated opening 31.
  • the opening extends in parallel relation with the duct 48 throughout substantially the entire length of the duct; thus, providing a direct unobstructed air flow from the duct.
  • outlet holes 62 in the upstream end of duct 48 are on a centerline approximately coincident with the centerline of coil 64, whereas the holes in the downstream end are on a line slightly below the coil centerline. It has been found that this arrangement provides superior results to that obtained when all holes are aligned on the coil centerline.
  • duct 48 is approximately 22 to 23 inches in length.
  • apertures 76 and 78 which are adjacent to the last hole in the downstream end of the duct are of the one-half inch diameter in size.
  • the centerline of holes 76 and 78 and the eight smaller holes is located approximately one eighth inch below the centerline of the ten upstream holes.
  • the air output of the fan is of course a critical factor in determining the pattern for the outlet holes 62.
  • the air delivery of the particular unit illustrated in the drawings is approximately 140 cubic feet per minute in free air.
  • baffie positioned within the upstream end of duct 48 between heater 64 and rear wall 12 and being slightly greater than one-third the length of the duct.
  • the baffie may be secured in this position by being welded or otherwise suitably attached to the upper and lower walls 50 and 52.
  • a portion of the air from fan 40 flows through the passage formed between the baflle 75 and the rear wall 12, thereby bypassing the upstream portion of the heater.
  • baffle 75 controls the air flow such that the bulk of the air is heated solely by only a portion of heater 48 with the result that even heat distribution from the heater is obtained.
  • the duct 48 is approximately twenty eight and one-half inches long and is provided with eighteen holes of the one-half inch size, with sixteen of the holes being on the upstream half of the duct and the other two one-half inch size holes being the last two holes in the downstream end of the duct. Eight of the smaller three-eighths of an inch diameter size holes are formed in the duct between the upstream holes and the two holes at the far end of the duct.
  • the baffle employed is also correspondingly longer. Naturally, if the duct is formed of other various lengths or if some of the other factors in the system are changed, such as the air output of the fan, the diameter and location of the outlet openings can be varied accordingly.
  • thermostat 80 is located in the scroll outlet section 4611 to sense the temperature of the air entering the heating chamber.
  • the shaft of this thermostat extends through the front wall 16 and has an indicator knob 82 attached thereto for controlling the temperature in turning the heater on and off. Suitable markings surrounding the knob 82 may be provided to indicate the heater setting.
  • the other thermostat84 is located on the underside of duct wall 52 midway between the ends of the duct to sense the duct temperature and to shut the heater off when the temperature rises above a predetermined level. Thermostat 84 will normally not operate to shut off the heater unless a portion of the air flow is blocked or restricted so as to cause an overheat condition.
  • a forced air electric baseboard heater comprising: a horizontally elongated housing adapted to be positioned at the base of a wall; a centrifugal fan and electric motor therefor mounted in one end of said housin a fan scroll positioned around said fan having an air inlet and an air outlet; an air inlet formed in said housing for permitting air to flow to said scroll air inlet; a horizontally elongated duct positioned in said housing having an end disposed "adjacent said fan and connected to said scroll outlet; an elongated electric heating means positioned in said duct extending substantially the full length thereof; elongated air outlet means formed in said housing positioned adjacent to and parallel with said duct; and a plurality of spaced openings formed in said duct along the length thereof and positioned in direct communication with said housing air outlet; said openings having a predetermined total area relative to the air out-put of said fan to maintain a pressure differential above atmospheric in said duct throughout its full length, the area of said openings per unit length of said du'c
  • a forced air electric baseboard heater comprising: a horizontally elongated housing to be positioned adjacent the base of a wall; a centrifugal fan and electric motor therefor mounted in one end of said housing; a fan scroll positioned around said fan having an axial air inlet and a tangential air outlet; an air inlet formed in said housing for permitting air to flow to said scroll air inlet; a horizontally elongated duct positioned in said housing spaced from the front and top walls, said duct having an end disposed adjacent said fan and in communication with said scroll outlet; an elongated electric heating coil positioned in said duct extending substantially the full length thereof; an elongated air outlet formed in the front wall of said housing positioned adjacent to and parallel with said duct; a plurality of spaced openings formed in said duct along the length thereof positioned in direct communication with said housing air outlet; said openings having a predetermined total area relative to the air output of said fan to maintain a pressure differential above atmospheric in said duct throughout its full length, the
  • a forced air electric heater comprising: a horizontally elongated housing; a fan and electric motor therefor mounted in one end of said housing; an air inlet formed in said housing for permitting air to flow to said fan; a horizontally elongated plenum chamber positioned in said housing having an end disposed adjacent said fan and connected to receive the air output of the fan; an elongated electric heating means positioned in said chamber extending substantially the full length thereof; an elongated air outlet formed in said housing positioned adjacent to and parallel with said chamber; a plurality of circular openings formed in the front wall of said chamber and spaced along the length of said heater in direct communication with said housing air outlet; said openings having a predetermined total area relative to the 6 air output of said fan to maintain a pressure differential above atmospheric in said duct throughout its full length, the area of said openings per unit length of said duct being greater in the portion thereof disposed adjacent the fan than in the portion adjacent the opposite end of said duct.
  • a forced air electric heater comprising: a horizontally elongated housing; a centrifugal fan and electric motor therefor mounted in one end of said housing; a fan scroll positioned around said fan and having an air inlet and an air outlet; air inlet means formed in said housing for permitting air to flow to said scroll air inlet; a horizontally elongated duct positioned in said housing having an end disposed adjacent said fan and connected to said scroll outlet; an elongated electric heating element in the shape of a helically Wound coil extending throughout substantially the entire length of said duct, a plurality of insulated supports secured at spaced locations to said duct for supporting said heating element, each of said supports including end supports attached to the ends of said heating element, said support-s intermediate the end supports having an opening (for loosely receiving the coil heating element whereby the element is supported but is yet free to move axially; means defining a plurality of air outlet openings in the front wall of said duct and positioned in spaced relation along the length of said duct; said openings
  • a forced air electric baseboard heater comprising: a horizontally elongated housing adapted to be installed at the base of a wall; a centrifugal fan and electric motor therefor mounted in one end of said housing; air inlet means formed in said housing for permitting air to flow to said fan; an elongated plenum chamber horizontally positioned in said housing having an end connected to said fan to receive the air output of said fan; an elongated electric heating element centrally positioned within said plenum chamber and extending substantially the full length thereof; air outlet means formed in one wall of said plenum chamber along the length of said heating element; an elongated air outlet formed in said housing adjacent to and in direct communication with said plenum chamber outlet means; bafi'le means disposed in a portion of said plenum chamber adjacent said fan between said heating element and a Wall of said plenum chamber opposite said one wall, said bafile means being spaced from said Wall of said plenum chamber opposite said one Wall to form a flow passage so that a portion of the air from said fan bypasse
  • a forced air electric baseboard heater comprising: a horizontally elongated housing adapted to be installed at the base of a wall; a centrifugal fan and electric motor therefor mounted in said housing; air inlet means formed in the [front wall of said housing for permitting air flow to said fan; an elongated plenum chamber horizontally positioned in said housing having an end connected to said fan to receive the air output of said fan, said plenum chamber havinga front wall spaced from said housing front Wall and a rear wall; an elongated electric heating element positioned Within said plenum chamber and extending throughout the length of the chamber; air outlet means formed in the front wall of said plenum chamber and in the adjacent opposed portion of the front wall of the housing along the length of said heating element; and a baffle plate disposed in a portion of said plenum chamber adjacent said fan between the rear wall of the plenum chamber and said heating element, said baffile plate being spaced from the rear Wall of said plenum chamber to define an air flow passage therebetween extending along at least one
  • a forced air electric baseboard heater comprising: a horizontally elongated housing adapted to be positioned at the base of a wall; said housing including a front wall having a first vertically oriented portion adjacent the lower edge of the wall and a second vertically extending portion positioned above and outwardly from said first portion with a generally horizontally extending wall connecting the two vertically oriented portions; a centrifugal fan 25 and electric motor therefor mounted within one end of said housing; a fan scroll surrounding said fan having 8 an axial air inlet and a tangential air outlet; air inlet means'forrned in said horizontal wall portion for permitting air to flow to said scroll air inlet; a horizontally elongated plenum chamber positioned in said housin 8 above said horizontal wall having an end disposed adjacent said fan and connected to said scroll outlet; elongated electric heater means positioned in said chamber extending substantially the full length thereof; air out-let means formed in said chamber extending along the length thereof; and air outlet means formed in said second vertically extending

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Resistance Heating (AREA)
  • Ventilation (AREA)
  • Basic Packing Technique (AREA)
US341215A 1964-01-30 1964-01-30 Forced air electric baseboard heater Expired - Lifetime US3267255A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US341215A US3267255A (en) 1964-01-30 1964-01-30 Forced air electric baseboard heater
GB52340/64A GB1088030A (en) 1964-01-30 1964-12-23 Forced air electric heater
CH7165A CH426158A (de) 1964-01-30 1965-01-05 Elektrischer Heizkörper mit Gebläse
DE1540782A DE1540782C3 (de) 1964-01-30 1965-01-13 Elektrisches Raumheizgerat mit Zwangsluftumlauf
ES0308091A ES308091A1 (es) 1964-01-30 1965-01-14 Un aparato calentador electrico de aire forzado
NL6500961A NL6500961A (de) 1964-01-30 1965-01-26
JP1965022784U JPS44819Y1 (de) 1964-01-30 1965-03-22

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Application Number Priority Date Filing Date Title
US341215A US3267255A (en) 1964-01-30 1964-01-30 Forced air electric baseboard heater

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US3267255A true US3267255A (en) 1966-08-16

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US341215A Expired - Lifetime US3267255A (en) 1964-01-30 1964-01-30 Forced air electric baseboard heater

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US (1) US3267255A (de)
JP (1) JPS44819Y1 (de)
CH (1) CH426158A (de)
DE (1) DE1540782C3 (de)
ES (1) ES308091A1 (de)
GB (1) GB1088030A (de)
NL (1) NL6500961A (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985295A (en) * 1975-03-17 1976-10-12 Monninger Robert C Heat collector and diffuser
US4109708A (en) * 1975-08-21 1978-08-29 Intertherm, Inc. Air conditioner unit having compartment provisions for access and motor cooling
US4467179A (en) * 1982-05-17 1984-08-21 Intertherm Inc. Portable electric baseboard heater having an integral handle
EP0126858A1 (de) * 1983-04-22 1984-12-05 Steinel GmbH & Co. KG Elektrischer Heizkörper
US4511786A (en) * 1982-04-09 1985-04-16 P.J. Industrial Safety Elec. Co. Ltd. Forced air distributor for baseboard heater
US4523081A (en) * 1982-12-27 1985-06-11 M. P. Metal Products, Inc. Forced air baseboard heater and air duct diffuser
US5361321A (en) * 1992-08-13 1994-11-01 Duracraft Corporation Portable electric heater deenergized by a tip-over responsive actuator
US6748163B2 (en) * 2001-07-19 2004-06-08 King Electrical Manufacturing Company Electric heater with dual overheat limits
US20040120815A1 (en) * 2002-12-18 2004-06-24 Lasko William E. Cooling fan
US20040120822A1 (en) * 2002-12-18 2004-06-24 Barry Shapiro Home comfort device
US20040120816A1 (en) * 2002-12-18 2004-06-24 Barry Shapiro Home comfort appliance
US20040218912A1 (en) * 2002-12-18 2004-11-04 Barry Shapiro Portable pedestal electric heater
US20050031448A1 (en) * 2002-12-18 2005-02-10 Lasko Holdings Inc. Portable air moving device
US20050078952A1 (en) * 2003-10-09 2005-04-14 Bain Benjamin H. Electric heater with forced air module
US20060034593A1 (en) * 2004-08-12 2006-02-16 American Dryer Corp. Heating element compartment for electric dryer applications
US20060199515A1 (en) * 2002-12-18 2006-09-07 Lasko Holdings, Inc. Concealed portable fan
US20080230619A1 (en) * 2007-03-21 2008-09-25 Robert Kirby Heating or heating and air conditioning unit with noise abatement feature and method of use
US20090245764A1 (en) * 2008-03-27 2009-10-01 Michel Gagnon Self-regulating electric heating system
US20210172651A1 (en) * 2019-12-06 2021-06-10 Matthew Alfred CROWE Electric space heater
CN115823642A (zh) * 2022-11-18 2023-03-21 珠海格力电器股份有限公司 一种底架支撑结构及踢脚线式电暖器
US20230235720A1 (en) * 2022-01-21 2023-07-27 Leslie P Duke Vehicle engine heater

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1880630A (en) * 1930-05-07 1932-10-04 Tropic Aire Inc Heating apparatus for automotive vehicles
US2451926A (en) * 1946-01-30 1948-10-19 Milton R Dallin Electric air heater
US2988626A (en) * 1958-12-05 1961-06-13 Robbins & Myers Baseboard heater and the like
FR1306576A (fr) * 1961-01-23 1962-10-13 Sterling Eng Co Ltd Perfectionnements aux appareils de chauffage
US3151671A (en) * 1962-07-30 1964-10-06 Peerless Of America Radiator assembly with booster control
US3189727A (en) * 1961-06-27 1965-06-15 Sunbeam Corp Electric space heater

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1880630A (en) * 1930-05-07 1932-10-04 Tropic Aire Inc Heating apparatus for automotive vehicles
US2451926A (en) * 1946-01-30 1948-10-19 Milton R Dallin Electric air heater
US2988626A (en) * 1958-12-05 1961-06-13 Robbins & Myers Baseboard heater and the like
FR1306576A (fr) * 1961-01-23 1962-10-13 Sterling Eng Co Ltd Perfectionnements aux appareils de chauffage
US3189727A (en) * 1961-06-27 1965-06-15 Sunbeam Corp Electric space heater
US3151671A (en) * 1962-07-30 1964-10-06 Peerless Of America Radiator assembly with booster control

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985295A (en) * 1975-03-17 1976-10-12 Monninger Robert C Heat collector and diffuser
US4109708A (en) * 1975-08-21 1978-08-29 Intertherm, Inc. Air conditioner unit having compartment provisions for access and motor cooling
US4511786A (en) * 1982-04-09 1985-04-16 P.J. Industrial Safety Elec. Co. Ltd. Forced air distributor for baseboard heater
US4467179A (en) * 1982-05-17 1984-08-21 Intertherm Inc. Portable electric baseboard heater having an integral handle
US4523081A (en) * 1982-12-27 1985-06-11 M. P. Metal Products, Inc. Forced air baseboard heater and air duct diffuser
EP0126858A1 (de) * 1983-04-22 1984-12-05 Steinel GmbH & Co. KG Elektrischer Heizkörper
US5361321A (en) * 1992-08-13 1994-11-01 Duracraft Corporation Portable electric heater deenergized by a tip-over responsive actuator
US6748163B2 (en) * 2001-07-19 2004-06-08 King Electrical Manufacturing Company Electric heater with dual overheat limits
US20050031448A1 (en) * 2002-12-18 2005-02-10 Lasko Holdings Inc. Portable air moving device
US7699580B2 (en) 2002-12-18 2010-04-20 Lasko Holdings, Inc. Portable air moving device
US20040120816A1 (en) * 2002-12-18 2004-06-24 Barry Shapiro Home comfort appliance
US6760543B1 (en) * 2002-12-18 2004-07-06 Lasko Holdings, Inc. Heated air circulator with uniform exhaust airflow
US20040197091A1 (en) * 2002-12-18 2004-10-07 Orr Paul W. Electric heater
US20040218912A1 (en) * 2002-12-18 2004-11-04 Barry Shapiro Portable pedestal electric heater
US20040120815A1 (en) * 2002-12-18 2004-06-24 Lasko William E. Cooling fan
US20040120822A1 (en) * 2002-12-18 2004-06-24 Barry Shapiro Home comfort device
US6942456B2 (en) 2002-12-18 2005-09-13 Lasko Holdings, Inc. Home comfort appliance
US6973260B2 (en) 2002-12-18 2005-12-06 Lasko Holdings, Inc. Portable electric heater with vertical heated air outlet
US6997680B2 (en) 2002-12-18 2006-02-14 Lasko Holdings, Inc. Home comfort device
US7158716B2 (en) 2002-12-18 2007-01-02 Lasko Holdings, Inc. Portable pedestal electric heater
US20060199515A1 (en) * 2002-12-18 2006-09-07 Lasko Holdings, Inc. Concealed portable fan
US20050078952A1 (en) * 2003-10-09 2005-04-14 Bain Benjamin H. Electric heater with forced air module
US20060034593A1 (en) * 2004-08-12 2006-02-16 American Dryer Corp. Heating element compartment for electric dryer applications
US20080230619A1 (en) * 2007-03-21 2008-09-25 Robert Kirby Heating or heating and air conditioning unit with noise abatement feature and method of use
US20090245764A1 (en) * 2008-03-27 2009-10-01 Michel Gagnon Self-regulating electric heating system
US8145047B2 (en) 2008-03-27 2012-03-27 Michel Gagnon Self-regulating electric heating system
US20210172651A1 (en) * 2019-12-06 2021-06-10 Matthew Alfred CROWE Electric space heater
US20230235720A1 (en) * 2022-01-21 2023-07-27 Leslie P Duke Vehicle engine heater
CN115823642A (zh) * 2022-11-18 2023-03-21 珠海格力电器股份有限公司 一种底架支撑结构及踢脚线式电暖器
CN115823642B (zh) * 2022-11-18 2024-05-28 珠海格力电器股份有限公司 一种底架支撑结构及踢脚线式电暖器

Also Published As

Publication number Publication date
DE1540782B2 (de) 1973-05-03
NL6500961A (de) 1965-08-02
ES308091A1 (es) 1965-04-16
GB1088030A (en) 1967-10-18
DE1540782C3 (de) 1973-11-22
DE1540782A1 (de) 1970-01-02
JPS44819Y1 (de) 1969-01-14
CH426158A (de) 1966-12-15

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