Granted Patent B2

US 12,721,477 · App. 18/391,506 · Granted Sep 1, 2026

Inventors: Natalia Gorlicka (Itasca, IL); Ethan Albrecht (Evanston, IL); Eric G. Griswold (Cary, IL)

A47J37/0786

Abstract

Claims (66)

1 . A heat diffuser configured to be positioned over a burn pot of a pellet grill, the heat diffuser comprising:

a front wall;

a rear wall located opposite the front wall;

a top wall extending between the front wall and the rear wall;

a bottom wall located opposite the top wall, the bottom wall extending between the front wall and the rear wall, the bottom wall including a first intake opening;

a right sidewall extending upwardly from the bottom wall toward the top wall, the right sidewall extending between the front wall and the rear wall, the right sidewall tapering outwardly from and oriented at a first angle relative to the bottom wall, wherein the first angle is between twenty and seventy degrees;

a left sidewall located opposite the right sidewall, the left sidewall extending upwardly from the bottom wall toward the top wall, the left sidewall extending between the front wall and the rear wall, the left sidewall tapering outwardly from and oriented at a second angle relative to the bottom wall, wherein the second angle is between twenty and seventy degrees;

a first exhaust opening located between the front wall and the rear wall and between the top wall and the right sidewall, the first exhaust opening being oriented at a third angle relative to the top wall, wherein the third angle is between twenty and seventy degrees; and

a second exhaust opening located between the front wall and the rear wall and between the top wall and the left sidewall, the second exhaust opening being oriented at a fourth angle relative to the top wall, wherein the fourth angle is between twenty and seventy degrees.

2 . The heat diffuser of claim 1 , wherein the front wall, the rear wall, the top wall, the bottom wall, the right sidewall, the left sidewall, the first intake opening, the first exhaust opening, and the second exhaust opening define an outer frame having an outer chamber, wherein the first intake opening is configured to receive a flow of heat generated by and emitted from the burn pot, the flow of heat to pass through the first intake opening and to progress into the outer chamber, wherein the first exhaust opening is configured to exhaust a first portion of the flow of heat out of the outer chamber in a first direction, and wherein the second exhaust opening is configured to exhaust a second portion of the flow of heat out of the outer chamber in a second direction that differs from the first direction.

3 . The heat diffuser of claim 2 , wherein the first direction extends outwardly from the right sidewall, and the second direction extends outwardly from the left sidewall.

4 . The heat diffuser of claim 1 , wherein the first exhaust opening and the second exhaust opening respectively have a rectangular shape.

5 . The heat diffuser of claim 1 , wherein the first angle is approximately forty degrees, and the second angle is approximately fifty-five degrees.

6 . The heat diffuser of claim 1 , wherein the third angle is approximately forty-five degrees, and the fourth angle is approximately forty-five degrees.

7 . The heat diffuser of claim 1 , wherein the front wall, the rear wall, the top wall, the bottom wall, the right sidewall, the left sidewall, the first intake opening, the first exhaust opening, and the second exhaust opening define an outer frame having an outer chamber, the heat diffuser further comprising an inner frame located within the outer frame, the inner frame having an inner chamber located within the outer chamber, the inner frame including:

an upper end located adjacent the top wall;

a lower end located opposite the upper end, the lower end located adjacent the bottom wall, the lower end including a second intake opening aligned with the first intake opening of the bottom wall;

a sidewall extending between the upper end and the lower end;

a first heat distribution opening formed in the sidewall of the inner frame and oriented toward the right sidewall of the outer frame; and

a second heat distribution opening formed in the sidewall of the inner frame and oriented toward the left sidewall of the outer frame.

8 . The heat diffuser of claim 7 , wherein the second intake opening is configured to receive a flow of heat generated by and emitted from the burn pot, the flow of heat to pass through the second intake opening into the inner chamber, wherein the first heat distribution opening is configured to distribute a first portion of the flow of heat from the inner chamber into the outer chamber in a first direction oriented toward the first exhaust opening, and wherein the second heat distribution opening is configured to distribute a second portion of the flow of heat from the inner chamber into the outer chamber in a second direction oriented toward the second exhaust opening.

9 . The heat diffuser of claim 7 , wherein the sidewall has a cylindrical shape.

10 . The heat diffuser of claim 7 , wherein the first heat distribution opening is smaller than the second heat distribution opening.

11 . The heat diffuser of claim 7 , wherein the first heat distribution and the second heat distribution opening respectively have a rectangular shape.

12 . The heat diffuser of claim 7 , wherein the inner frame further includes a third heat distribution opening formed in the sidewall and oriented toward the front wall, and a fourth heat distribution opening formed in the sidewall and oriented toward the rear wall.

13 . The heat diffuser of claim 1 , further comprising a plurality of positioning flanges extending downwardly from the bottom wall, wherein at least one of the plurality of positioning flanges includes an alignment notch, the alignment notch configured to receive an alignment tab to align the heat diffuser relative to the burn pot.

14 . A pellet grill, comprising:

a cookbox including an upper end and a lower end;

a cooking grate located within the cookbox between the upper end and the lower end;

a grease deflector located within the cookbox between the upper end and the lower end, the grease deflector located below the cooking grate;

a housing located within the cookbox between the upper end and the lower end, the housing located below the grease deflector, the housing containing a burn pot, the burn pot configured to generate and to emit a flow of heat; and

a heat diffuser located within the cookbox between the upper end and the lower end, the heat diffuser located below the grease deflector and above the burn pot, the heat diffuser positioned on the housing, the heat diffuser including:

a front wall;

a rear wall located opposite the front wall;

a top wall extending between the front wall and the rear wall;

a bottom wall located opposite the top wall, the bottom wall extending between the front wall and the rear wall, the bottom wall including a first intake opening;

a right sidewall extending upwardly from the bottom wall toward the top wall, the right sidewall extending between the front wall and the rear wall, the right sidewall tapering outwardly from and oriented at a first angle relative to the bottom wall, wherein the first angle is between twenty and seventy degrees;

a left sidewall located opposite the right sidewall, the left sidewall extending upwardly from the bottom wall toward the top wall, the left sidewall extending between the front wall and the rear wall, the left sidewall tapering outwardly from and oriented at a second angle relative to the bottom wall, wherein the second angle is between twenty and seventy degrees;

a first exhaust opening located between the front wall and the rear wall and between the top wall and the right sidewall, the first exhaust opening being oriented at a third angle relative to the top wall, wherein the third angle is between twenty and seventy degrees; and

a second exhaust opening located between the front wall and the rear wall and between the top wall and the left sidewall, the second exhaust opening being oriented at a fourth angle relative to the top wall, wherein the fourth angle is between twenty and seventy degrees.

15 . The pellet grill of claim 14 , wherein the front wall, the rear wall, the top wall, the bottom wall, the right sidewall, the left sidewall, the first intake opening, the first exhaust opening, and the second exhaust opening define an outer frame of the heat diffuser, the outer frame defining an outer chamber, wherein the first intake opening is configured to receive the flow of heat generated by and emitted from the burn pot, the flow of heat to pass through the first intake opening and to progress into the outer chamber, wherein the first exhaust opening is configured to exhaust a first portion of the flow of heat out of the outer chamber in a first direction extending outwardly from the right sidewall and upwardly toward the grease deflector, and wherein the second exhaust opening is configured to exhaust a second portion of the flow of heat out of the outer chamber in a second direction extending outwardly from the left sidewall and upwardly toward the grease deflector.

16 . The pellet grill of claim 14 , wherein the front wall, the rear wall, the top wall, the bottom wall, the right sidewall, the left sidewall, the first intake opening, the first exhaust opening, and the second exhaust opening define an outer frame of the heat diffuser, the outer frame defining an outer chamber, the heat diffuser further including an inner frame located within the outer frame, the inner frame defining an inner chamber located within the outer chamber, the inner frame including:

an upper end located adjacent the top wall;

a lower end located opposite the upper end, the lower end located adjacent the bottom wall, the lower end including a second intake opening aligned with the first intake opening of the bottom wall;

a sidewall extending between the upper end and the lower end;

a first heat distribution opening formed in the sidewall of the inner frame and oriented toward the right sidewall of the outer frame; and

a second heat distribution opening formed in the sidewall of the inner frame and oriented toward the left sidewall of the outer frame.

17 . The pellet grill of claim 16 , wherein the second intake opening is configured to receive the flow of heat generated by and emitted from the burn pot, the flow of heat to pass through the second intake opening into the inner chamber, wherein the first heat distribution opening is configured to distribute a first portion of the flow of heat from the inner chamber into the outer chamber in a first direction oriented toward the first exhaust opening, and wherein the second heat distribution opening is configured to distribute a second portion of the flow of heat from the inner chamber into the outer chamber in a second direction oriented toward the second exhaust opening.

18 . The pellet grill of claim 14 , wherein the grease deflector has an inverted V-shaped cross-sectional profile, the grease deflector having a lengthwise span and a widthwise span, the lengthwise span of the grease deflector exceeding a lengthwise span of the heat diffuser, the widthwise span of the grease deflector exceeding a widthwise span of the heat diffuser.

19 . A heat diffuser configured to be positioned over a burn pot of a pellet grill, the heat diffuser comprising:

a front wall;

a rear wall located opposite the front wall;

a top wall extending between the front wall and the rear wall;

a bottom wall located opposite the top wall, the bottom wall extending between the front wall and the rear wall, the bottom wall including a first intake opening;

a right sidewall extending upwardly from the bottom wall toward the top wall, the right sidewall extending between the front wall and the rear wall;

a left sidewall located opposite the right sidewall, the left sidewall extending upwardly from the bottom wall toward the top wall, the left sidewall extending between the front wall and the rear wall;

a first exhaust opening located between the front wall and the rear wall and between the top wall and the right sidewall;

a second exhaust opening located between the front wall and the rear wall and between the top wall and the left sidewall;

an outer frame defined by the front wall, the rear wall, the top wall, the bottom wall, the right sidewall, the left sidewall, the first intake opening, the first exhaust opening, and the second exhaust opening, the outer frame having an outer chamber; and

an inner frame located within the outer frame, the inner frame having an inner chamber located within the outer chamber, the inner frame including:

an upper end located adjacent the top wall;

a lower end located opposite the upper end, the lower end located adjacent the bottom wall, the lower end including a second intake opening aligned with the first intake opening of the bottom wall;

a sidewall extending between the upper end and the lower end;

a first heat distribution opening formed in the sidewall of the inner frame and oriented toward the right sidewall of the outer frame; and

a second heat distribution opening formed in the sidewall of the inner frame and oriented toward the left sidewall of the outer frame, wherein the first heat distribution opening is smaller than the second heat distribution opening.

20 . The heat diffuser of claim 19 , wherein the second intake opening is configured to receive a flow of heat generated by and emitted from the burn pot, the flow of heat to pass through the second intake opening into the inner chamber, wherein the first heat distribution opening is configured to distribute a first portion of the flow of heat from the inner chamber into the outer chamber in a first direction oriented toward the first exhaust opening, and wherein the second heat distribution opening is configured to distribute a second portion of the flow of heat from the inner chamber into the outer chamber in a second direction oriented toward the second exhaust opening.

Assignments (4)

Continuity (1)

References Cited (91)