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US3911893A - Ventilating system for self-cleaning wall oven - Google Patents

Ventilating system for self-cleaning wall oven Download PDF

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Publication number
US3911893A
US3911893A US482197A US48219774A US3911893A US 3911893 A US3911893 A US 3911893A US 482197 A US482197 A US 482197A US 48219774 A US48219774 A US 48219774A US 3911893 A US3911893 A US 3911893A
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Prior art keywords
control chamber
panel assembly
air
passage
control panel
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US482197A
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Gerald E Baker
Eugene J Barnett
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White Westinghouse Corp
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White Westinghouse Corp
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Priority to US482197A priority Critical patent/US3911893A/en
Priority to ZA00753696A priority patent/ZA753696B/en
Priority to AU82158/75A priority patent/AU490197B2/en
Priority to CA229,497A priority patent/CA1026181A/en
Priority to ES438847A priority patent/ES438847A1/en
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Publication of US3911893A publication Critical patent/US3911893A/en
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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
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • 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
    • F24C15/00—Details
    • F24C15/006—Arrangements for circulation of cooling air
    • 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
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities

Definitions

  • ABSTRACT A self-cleaning wall oven is provided with a ventilating system in which air is drawn into an intermediate passage located between the over liner and an upper control chamber from the sides and rear, as well as from the front through a location generally between the control panel and the upper edge of the door. This air being exhausted into the overlying control chamber and out the front upper edge of the control panel.
  • the invention pertains to the art of ventilating systems for domestic self-cleaning wall ovens.
  • the principal object of my invention is to provide a fan-forced ventilating system which channels the airflow in ways which obtain adequate surface temperature cooling and which has inlets and outlets in the most advantageous location.
  • the self-cleaning wall oven construction includes side and rear airflow passages in communication with an intermediate airflow passage located above the oven and below an upper control chamber with a forced air fan being disposed to draw air from the intermediate passage into the control chamber space and exhaust it in an upward direction along the upper front edge of the control panel assembly at the front of the control chamber. Air is also introduced into the intermediate passage through an air inlet opening means in the lower portion of the control panel assembly.
  • the fan aperture is in the horizontal plane of the wall between the intermediate passage and the control chamber so that if a fan failure occurs, and in bake and broil operations of the oven, there is convection airflow through the system.
  • FIG. I is a generally schematic side view of a selfcleaning wall oven incorporating the invention, and illustrating the general flow paths of the air in the system;
  • FIG. 2 is a partly broken isometric view of an oven according to the invention, also illustrating flow paths.
  • An outer shell for the oven assembly as a whole is formed by a top wall 24, opposite side walls 26 (only the right-hand wall being shown in the drawing), a rear wall 28 and a bottom channel-shaped member 30 attached to the bottom of the assembly.
  • a chamber characterized as the control chamber is formed in the upper part of the outer shell and is bounded at the top by top wall 24, at the rear by rear wall 28, at the sides by the opposite side walls 26, at the front by the control panel assembly generally designated 32 and at the bottom by the control chamber bottom wall 34.
  • the control panel assembly carries operating knobs 36 accessible from the front and connected to operating elements such as switches, timers and oven controls supported immediately behind the control panel assembly.
  • the control chamber contains partition means 38 extending between the opposite sides of the control chamber adjacent the front of the control chamber to separate the space immediately behind the control chamber front panel assembly from the remainder of the control chamber space.
  • the shape in cross section of the partition means 38 is perhaps best seen in FIG. 1 and includes a vertical wall component having its lower edge connected to the control chamber bottom wall 34, then an upwardly and forwardly inclined part, then a horizontal part, and finally an upwardly and forwardly inclined lip 40 for the purpose of deflecting exhaust air from the control chamber upwardly through the grille-like openings 42 along the top edge of the control panel assembly 32.
  • the control chamber bottom wall 34 is provided with a circular opening 44, the boundaries thereof serving as a fan ring for fan 46 driven by motor 48 mounted on bottom wall 34.
  • An intermediate passage generally designated 50 is located above the oven liner top panel 20 and below the control chamber bottom wall 34. It may be observed in FIG. 2 that the side edges and rear edge of the top panel 20 are spaced inwardly from the'inner faces of the side walls 26 and rear wall 28, respectively, so that this intermediate passage 50 is in communication with both the side airflow passages 52 (defined between side panel 22 and outer side wall 26), and rear airflow passage 54 (defined between the oven liner rear panel and outer rear wall 28).
  • This intermediate passage 50 also has inlet opening means as at the grille 56 in the lower portion of the control panel assembly 32.
  • a front frame assembly 64 serves as a basic structural part at the front of the oven assembly and has a number of side wall parts and the control panel assembly fastened thereto to provide overall structural integrity of the assembly.
  • a series of vertically disposed slots 66 in this front frame assembly at the sides of the oven are aligned with the side air passages 52 to admit air from the room thereinto. It will be understood that there is a gap between the rear facing marginal side portions of the door and the facing front frame so that air can pass through the gap to get to the slots 66.
  • a suitable gap 70 is provided at the bottom front of the oven assembly so that room air can be admitted into the bottom passage formed by the channel 30 to pass to the rear of the oven and thence up the open bottom end of the rear airflow passage 54.
  • This airflow passage 54 contains a temperature responsive switch 72 (FIG. 1) for performing a safety function in the event the temperature in this space exceeds a specified limit due to a stalled or inoperative fan during a heat cleaning cycle. Under normal conditions during a heat cleaning cycle, the airflow through the passage 54 performs a cooling function offsetting radiated heat received from the oven by the switch.
  • the door 16 includes vertically extending ventilation air passages 74 in its interior and inlet slots 76 along the bottom edge of the door and outlet slots 78 along the top edge of the door immediately below the lower edge of the control panel assembly.
  • the part of the control chamber bottom wall 34 underlying the partition means 38 includes one or more apertures 80 which permits a limited draft of air which leaks into the space immediately behind the control panel assembly to be pulled into the intermediate passage 50 to prevent a build-up of heat in the space.
  • control chamber space overlying the fan constitutes the high pressure side of the system, into which all of the air warmed by passing along the sides, bottom, rear and top of the oven liner is admitted, and this warm air is then exhausted out into the room through the slots along the top edge of the top trim of the control panel assembly.
  • the fan will ordinarily be operated only during a heat cleaning cycle. but in case of a fan failure or stall, and during both bake and broil operations, there is a convection airflow through the system with the warm air being exhausted through the slots 42 and the top trim as well as forwardly out of the intermediatie passage front opening 56. This gives a cooler product in all operational modes than those systems which use a damper type switching device for sensing fan failure.
  • the convection airflow under these conditions is also enhanced by the horizontal disposition of the fan ring opening 44.
  • a self-cleaning wall oven comprising:
  • control chamber overlying said liner and having a bottom wall spaced above the top of said liner to define an intermediate airflow passage therebetween, said chamber having a front facing control panel assembly, said control panel assembly including inlet opening means along its lower portion to admit air into said intermediate passage, and outlet opening means along its upper portion for the pas sage of exhaust air from said control chamber;
  • an outer shell including opposite side and rear walls spaced away from the respectively facing walls of said liner to define side and rear airflow passages in communication with said intermediate airflow passage;
  • blower aperture in said control chamber bottom wall, and a blower in said aperture, to draw air through said side and rear airflow passages and through said control panel assembly inlet opening means, and to force said air so drawn into said control chamber out said control panel assembly outlet openings;
  • partition means extending between the opposite sides of said control chamber adjacent the front of said control chamber to separate the space immediately behind the control chamber front panel assembly from the remainder of said control chamber space through which said exhaust air passes.
  • An oven according to claim 1 including:
  • temperature responsive switch means located in said rear airflow passage for interrupting a self-cleaning operation under an overheat condition.
  • control chamber bottom wall includes an opening therein to place the shielded space immediately behind said control panel assembly in communication with said intermediate passage to permit a limited draft of air therethrough.
  • said door includes vertically disposed ventilating air passage means therethrough, said ventilating air passage means having outlet opening means located closely below said inlet opening means of said control panel assembly.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)

Abstract

A self-cleaning wall oven is provided with a ventilating system in which air is drawn into an intermediate passage located between the over liner and an upper control chamber from the sides and rear, as well as from the front through a location generally between the control panel and the upper edge of the door. This air being exhausted into the overlying control chamber and out the front upper edge of the control panel.

Description

United States Patent 1 Baker et a1.
[ VENTILATING SYSTEM FOR SELF-CLEANING WALL OVEN [75] lnventors: Gerald E. Baker; Eugene J. Barnett,
both of Mansfield, Ohio [73] Assignee: White-Westinghouse Corporation, Cleveland, Ohio [22] Filed: June 24, 1974 [21] App]. No.: 482,197
[52] US. Cl. 126/21 A; 126/198; 126/273 A [51] Int. Cl. F24C 15/32 [58] Field of Search 126/21 R, 21 A, 273 R,
[56] References Cited UNlTED STATES PATENTS 3,205,884 9/1965 Locher 126/273 A [451 Oct. 14, 1975 3,322.1 l 1 5/1967 Simpson et a1 126/21 R 3,384,067 5/1968 Rawald et a1. 12 6/21 A 3,485,229 12/ 1969 3,509,868 5/1970 Mono 126/198 Primary Examiner-Edward G. Favors Attorney, Agent, or Firm-McNenny, Farrington, Pearne & Gordon [57] ABSTRACT A self-cleaning wall oven is provided with a ventilating system in which air is drawn into an intermediate passage located between the over liner and an upper control chamber from the sides and rear, as well as from the front through a location generally between the control panel and the upper edge of the door. This air being exhausted into the overlying control chamber and out the front upper edge of the control panel.
4 Claims, 2 Drawing Figures FIG.
\ .PIT .TII lull U.S. Patent 0a. 14, 1975 Sheet 2 of2 3,911,893
VENTILATING SYSTEM IFOR SELF-CLEANING WALL OVEN CROSS REFERENCE TO RELATED APPLICATION Barnett U.S. Pat. application Ser. No. 482,l96-filed June 24, 1974 is a related application in the sense of commonality of some parts of the oven assembly.
BACKGROUND OF THE INVENTION A 1. Field of the Invention The invention pertains to the art of ventilating systems for domestic self-cleaning wall ovens.
2. Description of the Prior Art Various forced air ventilating systems for selfcleaning wall ovens are illustrated in U.S. Pat. Nos. 3,686,476; 3,587,557; 3,485,229; 3,384,067 and 3,310,046. Additionally, U.S. Pat. Nos. 3,659,578 and 3,633,561 disclose ventilating systems for self-cleaning ovens in which a forced air fan is not provided, the passages being arranged to obtain sufficient air movement by convection. With increasingly stringent surface temperature limits being imposed upon range manufacturers, in some installations it is questionable whether the convection ventilating systems will meet the requirements. As to those arrangements which include forced air fans, the airflow paths are not considered to be optimized to obtain the most advantageous results, and in some of the arrangements dampers are provided which are at the least expensive, and in some instances will block convection flow if a fan failure occurs.
The principal object of my invention is to provide a fan-forced ventilating system which channels the airflow in ways which obtain adequate surface temperature cooling and which has inlets and outlets in the most advantageous location.
SUMMARY OF THE INVENTION In accordance with the invention, the self-cleaning wall oven construction includes side and rear airflow passages in communication with an intermediate airflow passage located above the oven and below an upper control chamber with a forced air fan being disposed to draw air from the intermediate passage into the control chamber space and exhaust it in an upward direction along the upper front edge of the control panel assembly at the front of the control chamber. Air is also introduced into the intermediate passage through an air inlet opening means in the lower portion of the control panel assembly. The fan aperture is in the horizontal plane of the wall between the intermediate passage and the control chamber so that if a fan failure occurs, and in bake and broil operations of the oven, there is convection airflow through the system.
Additional features of the invention will be described in the following description.
DRAWING DESCRIPTION FIG. I is a generally schematic side view of a selfcleaning wall oven incorporating the invention, and illustrating the general flow paths of the air in the system; and
FIG. 2 is a partly broken isometric view of an oven according to the invention, also illustrating flow paths.
DESCRIPTION OF THE PREFERRED EMBODIMENT panels with only top panel and side panel 22 being observable in FIG. 2.
An outer shell for the oven assembly as a whole is formed by a top wall 24, opposite side walls 26 (only the right-hand wall being shown in the drawing), a rear wall 28 and a bottom channel-shaped member 30 attached to the bottom of the assembly.
A chamber characterized as the control chamber is formed in the upper part of the outer shell and is bounded at the top by top wall 24, at the rear by rear wall 28, at the sides by the opposite side walls 26, at the front by the control panel assembly generally designated 32 and at the bottom by the control chamber bottom wall 34. The control panel assembly carries operating knobs 36 accessible from the front and connected to operating elements such as switches, timers and oven controls supported immediately behind the control panel assembly.
The control chamber contains partition means 38 extending between the opposite sides of the control chamber adjacent the front of the control chamber to separate the space immediately behind the control chamber front panel assembly from the remainder of the control chamber space. The shape in cross section of the partition means 38 is perhaps best seen in FIG. 1 and includes a vertical wall component having its lower edge connected to the control chamber bottom wall 34, then an upwardly and forwardly inclined part, then a horizontal part, and finally an upwardly and forwardly inclined lip 40 for the purpose of deflecting exhaust air from the control chamber upwardly through the grille-like openings 42 along the top edge of the control panel assembly 32.
The control chamber bottom wall 34 is provided with a circular opening 44, the boundaries thereof serving as a fan ring for fan 46 driven by motor 48 mounted on bottom wall 34.
An intermediate passage generally designated 50 is located above the oven liner top panel 20 and below the control chamber bottom wall 34. It may be observed in FIG. 2 that the side edges and rear edge of the top panel 20 are spaced inwardly from the'inner faces of the side walls 26 and rear wall 28, respectively, so that this intermediate passage 50 is in communication with both the side airflow passages 52 (defined between side panel 22 and outer side wall 26), and rear airflow passage 54 (defined between the oven liner rear panel and outer rear wall 28). This intermediate passage 50 also has inlet opening means as at the grille 56 in the lower portion of the control panel assembly 32.
The gases produced within the oven cavity during a heat cleaning cycle are vented back into the room through a vertical conduit 58 (FIG. 1) which extends through the insulation above the oven liner and has its open upper end connected to a relatively shallow horizontal vent duct 60 (FIG. 2 in the lower portion of the intermediate passage 50 and extends forwardly to the outlet 62 at the right lower front of the control panel assembly 32. This arrangement is basically that as disclosed in US. Pat. No. 3,633,561.
A front frame assembly 64 serves as a basic structural part at the front of the oven assembly and has a number of side wall parts and the control panel assembly fastened thereto to provide overall structural integrity of the assembly. A series of vertically disposed slots 66 in this front frame assembly at the sides of the oven are aligned with the side air passages 52 to admit air from the room thereinto. It will be understood that there is a gap between the rear facing marginal side portions of the door and the facing front frame so that air can pass through the gap to get to the slots 66.
Referring to FIG. 1, in the installed relation of the oven assembly to the wall cabinet 68 a suitable gap 70 is provided at the bottom front of the oven assembly so that room air can be admitted into the bottom passage formed by the channel 30 to pass to the rear of the oven and thence up the open bottom end of the rear airflow passage 54. This airflow passage 54 contains a temperature responsive switch 72 (FIG. 1) for performing a safety function in the event the temperature in this space exceeds a specified limit due to a stalled or inoperative fan during a heat cleaning cycle. Under normal conditions during a heat cleaning cycle, the airflow through the passage 54 performs a cooling function offsetting radiated heat received from the oven by the switch. lf the airflow is interrupted due to a malfunction of the fan the radiated heat and heat conducted from the oven operates the switch which in turn interrupts the self-cleaning cycle to eliminate any impossible hazardous condition. It is noted that other electrical components such as switches and solenoids relating to the locking of the oven door may also be located in the rear airflow passage 54 and receive cooling by the airflow passing thereby.
The door 16 includes vertically extending ventilation air passages 74 in its interior and inlet slots 76 along the bottom edge of the door and outlet slots 78 along the top edge of the door immediately below the lower edge of the control panel assembly. With this arrangement the convected airflow upwardly through the door interior is aided by the induced draft into the intermediate passage through inlet opening 56 in the control panel assembly. The overall airflow upwardly through the door and the airflow into the intermediate passage from the area of the room immediately forwardly of the control panel assembly tends to reduce the temperature of the various parts such as the knobs and vent trim past which the air flows.
Referring to FIG. 2, the part of the control chamber bottom wall 34 underlying the partition means 38 includes one or more apertures 80 which permits a limited draft of air which leaks into the space immediately behind the control panel assembly to be pulled into the intermediate passage 50 to prevent a build-up of heat in the space.
From the foregoing description it will be understood that the control chamber space overlying the fan constitutes the high pressure side of the system, into which all of the air warmed by passing along the sides, bottom, rear and top of the oven liner is admitted, and this warm air is then exhausted out into the room through the slots along the top edge of the top trim of the control panel assembly. The fan will ordinarily be operated only during a heat cleaning cycle. but in case of a fan failure or stall, and during both bake and broil operations, there is a convection airflow through the system with the warm air being exhausted through the slots 42 and the top trim as well as forwardly out of the intermediatie passage front opening 56. This gives a cooler product in all operational modes than those systems which use a damper type switching device for sensing fan failure. The convection airflow under these conditions is also enhanced by the horizontal disposition of the fan ring opening 44.
We claim:
1. A self-cleaning wall oven comprising:
an exteriorly insulated oven liner having an open front;
a door for closing said front;
a control chamber overlying said liner and having a bottom wall spaced above the top of said liner to define an intermediate airflow passage therebetween, said chamber having a front facing control panel assembly, said control panel assembly including inlet opening means along its lower portion to admit air into said intermediate passage, and outlet opening means along its upper portion for the pas sage of exhaust air from said control chamber;
an outer shell including opposite side and rear walls spaced away from the respectively facing walls of said liner to define side and rear airflow passages in communication with said intermediate airflow passage;
a blower aperture in said control chamber bottom wall, and a blower in said aperture, to draw air through said side and rear airflow passages and through said control panel assembly inlet opening means, and to force said air so drawn into said control chamber out said control panel assembly outlet openings; and
partition means extending between the opposite sides of said control chamber adjacent the front of said control chamber to separate the space immediately behind the control chamber front panel assembly from the remainder of said control chamber space through which said exhaust air passes.
2. An oven according to claim 1 including:
temperature responsive switch means located in said rear airflow passage for interrupting a self-cleaning operation under an overheat condition.
3. An oven according to claim 1 wherein:
said control chamber bottom wall includes an opening therein to place the shielded space immediately behind said control panel assembly in communication with said intermediate passage to permit a limited draft of air therethrough.
4. An oven according to claim I wherein:
said door includes vertically disposed ventilating air passage means therethrough, said ventilating air passage means having outlet opening means located closely below said inlet opening means of said control panel assembly.

Claims (4)

1. A self-cleaning wall oven comprising: an exteriorly insulated oven liner having an open front; a door for closing said front; a control chamber overlying said liner and having a bottom wall spaced above the top of said liner to define an intermediate airflow passage therebetween, said chamber having a front facing control panel assembly, said control panel assembly including inlet opening means along its lower portion to admit air into said intermediate passage, and outlet opening means along its upper portion for the passage of exhaust air from said control chamber; an outer shell including opposite side and rear walls spaced away from the respectively facing walls of said liner to define side and rear airflow passages in communication with said intermediate airflow passage; a blower aperture in said control chamber bottom wall, and a blower in said aperture, to draw air through said side and rear airflow passages and through said control panel assembly inlet opening means, and to force said air so drawn into said control chamber out said control panel assembly outlet openings; and partition means extending between the opposite sides of said control chamber adjacent the front of said control chamber to separate the space immediately behind the control chamber front panel assembly from the remainder of said control chamber space through which said exhaust air passes.
2. An oven according to claim 1 including: temperature responsive switch means located in said rear airflow passage for interrupting a self-cleaning operation under an overheat condition.
3. An oven according to claim 1 wherein: said control chamber bottom wall includes an opening therein to place the shielded space immediately behind said control panel assembly in communication with said intermediate passage to permit a limited draft of air therethrough.
4. An oven according to claim 1 wherein: said door includes vertically disposed ventilating air passage means therethrough, said ventilating air passage means having outlet opening means located closely below said inlet opening means of said control panel assembly.
US482197A 1974-06-24 1974-06-24 Ventilating system for self-cleaning wall oven Expired - Lifetime US3911893A (en)

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Application Number Priority Date Filing Date Title
US482197A US3911893A (en) 1974-06-24 1974-06-24 Ventilating system for self-cleaning wall oven
ZA00753696A ZA753696B (en) 1974-06-24 1975-06-09 Ventilating system for self-cleaning wall oven
AU82158/75A AU490197B2 (en) 1974-06-24 1975-06-17 Ventilating system for self-cleaning wall oven
CA229,497A CA1026181A (en) 1974-06-24 1975-06-17 Ventilating system for self-cleaning wall oven
ES438847A ES438847A1 (en) 1974-06-24 1975-06-24 Ventilating system for self-cleaning wall oven

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US4354084A (en) * 1978-06-09 1982-10-12 Bosch Siemens Hausgerate Gmbh Twin baking oven, particularly built-in baking oven
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US20110209626A1 (en) * 2009-09-01 2011-09-01 Manitowoc Foodservice Companies, Llc Method and Apparatus for Cooling a User Interface and/or Door of a Cooking Device
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CN105659030A (en) * 2013-10-25 2016-06-08 意黛喜公司 Pyrolytic oven with improved cooling
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US11060735B2 (en) 2015-05-05 2021-07-13 June Life, Inc. Connected food preparation system and method of use
US11058132B2 (en) 2019-11-20 2021-07-13 June Life, Inc. System and method for estimating foodstuff completion time
US11076604B2 (en) * 2015-10-23 2021-08-03 Duke Manufacturing Co. Convection oven
US11116050B1 (en) 2018-02-08 2021-09-07 June Life, Inc. High heat in-situ camera systems and operation methods
US11506395B2 (en) 2015-05-05 2022-11-22 June Life, Inc. Tailored food preparation with an oven
USD978600S1 (en) 2021-06-11 2023-02-21 June Life, Inc. Cooking vessel
US11593717B2 (en) 2020-03-27 2023-02-28 June Life, Inc. System and method for classification of ambiguous objects
US11680712B2 (en) 2020-03-13 2023-06-20 June Life, Inc. Method and system for sensor maintenance
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US12185862B2 (en) 2020-08-14 2025-01-07 June Life Llc System and method for targeted heating element control
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ZA753696B (en) 1976-05-26
ES438847A1 (en) 1977-02-01
CA1026181A (en) 1978-02-14

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