Dual-burner assemblies for cookboxes of gas grills

Example dual-burner assemblies for cookboxes of gas grills are disclosed. An example dual-burner assembly includes a first burner tube and a second burner tube. The first burner tube has a first maximum heat output. The second burner tube has a second maximum heat output. The second burner tube is spaced apart from the first burner tube by a distance of no more than 0.750 inches. The second maximum heat output is less than the first maximum heat output.

FIELD OF THE DISCLOSURE

This disclosure relates generally to burners for cookboxes of gas grills and, more specifically, to dual-burner assemblies for cookboxes of gas grills.

BACKGROUND

Cookboxes of conventional gas grills are typically equipped with two or more atmospheric burners (e.g., burners that operate at atmospheric pressure and without forced induction) that are spaced apart from one another (e.g., a right burner and a left burner) and configured to provide zone-based heating within the cookbox. Atmospheric burners have existed for over one hundred years, and their use in gas-fueled outdoor cooking appliances is widely accepted.

For any given atmospheric burner design, there are natural limits to the “low” and the “high” operating settings. The “low” setting (e.g., the lowest flow rate at which an air/fuel mixture travels through the burner) is limited by the burner's ability to prevent flashback. The “high” setting (e.g., the highest flow rate at which an air/fuel mixture travels through the burner) is limited by the burner's ability to prevent flame lift and/or combustion outputs (e.g., non-combusted carbon, carbon monoxide content in exhaust). Thus, the low-energy setting and the high-energy setting of any given burner is set such that the individual burner, and the complete system of burners within the gas-fueled outdoor cooking appliance, operate within safe conditions.

For example, an individual burner of a Weber® Genesis II 310 model gas grill operates between a low setting of six thousand British Thermal Units per hour (6,000 BTU/hour) and a high setting of thirteen thousand five hundred British Thermal Units per hour (13,500 BTU/hour). The ratio between the high operational setting and the low operational setting of a burner is known as the “turndown ratio.” In the above example, the individual burner of the Weber® Genesis II 310 model has a turndown ratio of 2.25, calculated by dividing the high operational setting (13,500 BTU/hour) by the low operational setting (6,000 BTU/hour).

When designing a burner for a gas-fueled outdoor cooking appliance, it is generally desirable to maximize the turndown ratio of the burner. Efforts to maximize the turndown ratio are typically bounded, however, by the above-described natural limits (e.g., the burner's ability to prevent flashback, and the burner's ability to prevent flame lift and/or combustion outputs), and/or by other design constraints.

Certain examples are shown in the above-identified figures and described in detail below. In describing these examples, like or identical reference numbers are used to identify the same or similar elements. The figures are not necessarily to scale and certain features and certain views of the figures may be shown exaggerated in scale or in schematic for clarity and/or conciseness.

DETAILED DESCRIPTION

Example dual-burner assemblies disclosed herein are configured to be implemented in gas-fueled outdoor cooking appliances, and, more specifically, in cookboxes of a gas grills. Example dual-burner assemblies disclosed herein are advantageously configured to provide operational heating ranges and associated turndown ratios that are significantly improved relative to the operational heating ranges and turndown ratios of known atmospheric burners for gas-fueled outdoor cooking appliances.

Example dual-burner assemblies disclosed herein include a first burner tube having a first maximum heat output, and a second burner tube having a second maximum heat output that is less than the first maximum heat output. In some examples, the second burner tube is spaced apart from the first burner tube by a distance of no more than 0.750 inches, and provides a concentrated heat output within a span of approximately 1.250 inches. In some such examples, the second burner tube is coupled to the first burner tube in a manner that defines and/or maintains the above-described spacing between the first and second burner tubes of the dual-burner assembly.

The dual heat outputs of the first and second burner tubes advantageously enable the dual-burner assembly to be operated over a broader range of temperatures than would otherwise be the case with a single atmospheric burner. In some examples, dual-burner assemblies disclosed herein are configured to operate with a low heat output of approximately 3,500 BTU/hour and a high heat output of approximately 17,000 BTU/hour, thereby providing an operational heating range of approximately 13,500 BTU/hour (e.g., 17,000-3,500=13,500), and a turndown ratio of approximately 4.86 (e.g., 17,000/3,500=4.86). By contrast, a known burner of the Weber® Genesis II 310 model gas grill operates with a low heat output of approximately 6,000 BTU/hour and a high heat output of approximately 13,500 BTU/hour, thereby providing an operational heating range of approximately 7,500 BTU/hour (e.g., 13,500-6,000=7,500), and a turndown ratio of approximately 2.25 (e.g., 13,500/6,000=2.25).

The improved operational heating range and turndown ratio associated with the disclosed dual-burner assemblies enable the dual-burner assembly to achieve higher energy levels (and thus higher cook temperatures) as well as lower energy levels (and thus lower cook temperatures) relative to known atmospheric burners. These improvements provide numerous advantages to the gas-fueled outdoor cooking appliance and the user experience associated therewith. For example, the higher energy levels achievable via the disclosed dual-burner assemblies significantly reduce the time needed to preheat the gas-fueled outdoor cooking appliance. As another example, when multiple instances of the disclosed dual-burner assemblies are implemented within a cookbox of a gas grill, the higher energy levels achievable via the disclosed dual-burner assemblies enable the entire cooking surface of the gas grill to be used for high-heat searing. As another example, when multiple instances of the disclosed dual-burner assemblies are implemented within a cookbox of a gas grill, the lower energy levels achievable via the disclosed dual-burner assemblies enable the entire cooking surface of the gas grill to be used for low-heat cooking, including simmering and smoking.

In some disclosed examples, the dual-burner assembly includes a single-inlet, dual-outlet valve that selectively distributes pressurized gas (e.g., received at the inlet of the valve) to the first and second burner tubes (e.g., via the first and second outlets of the valve) of the dual-burner assembly. Thus, a single consumer input (e.g., provided to the valve via a user-operated knob) can advantageously control the gas flow to both of the first and second burner tubes of the dual-burner assembly.

Dual-burner assemblies disclosed herein accordingly provide numerous enhancements for gas-fueled outdoor cooking appliances, and particularly for cookboxes of gas grills. The above-identified features as well as other advantageous features of example dual-burner assemblies disclosed herein are further described below in connection with the figures of the application. As used herein, the term “configured” means sized, shaped, arranged, structured, oriented, positioned and/or located. For example, in the context of a first object configured to fit within a second object, the first object is sized, shaped, arranged, structured, oriented, positioned and/or located to fit within the second object. As used herein in the context of a first object circumscribing a second object, the term “circumscribe” means that the first object is constructed around and/or defines an area around the second object. In interpreting the term “circumscribe” as used herein, it is to be understood that the first object circumscribing the second object can include gaps and/or can consist of multiple spaced-apart objects, such that a boundary formed by the first object around the second object is not necessarily a continuous boundary. For example, a plurality of trees can circumscribe a field.

FIG.1is a perspective view of an example dual-burner assembly100constructed in accordance with teachings of this disclosure.FIG.2is a top view of the dual-burner assembly100ofFIG.1.FIG.3is a bottom view of the dual-burner assembly100ofFIGS.1and2.FIG.4is a right side view of the dual-burner assembly100ofFIGS.1-3.FIG.5is a left side view of the dual-burner assembly100ofFIGS.1-4. In the illustrated example ofFIGS.1-5, the dual-burner assembly100includes an example first burner tube102(e.g., a right burner tube), an example first venturi insert104, an example first air shutter106, an example second burner tube108(e.g., a left burner tube), an example second venturi insert110, an example second air shutter112, an example valve114, and an example knob116.FIG.6is a perspective view of the dual-burner assembly100ofFIGS.1-5, with the knob116of the dual-burner assembly100removed.FIG.7is a perspective view of the dual-burner assembly100ofFIGS.1-5, with both the knob116and the valve114of the dual-burner assembly100removed.FIG.8is an isolated perspective view of the first burner tube102of the dual-burner assembly100ofFIGS.1-5.FIG.9is an isolated perspective view of the first venturi insert104of the dual-burner assembly100ofFIGS.1-5.FIG.10is an isolated perspective view of the second burner tube108of the dual-burner assembly100ofFIGS.1-5.FIG.11is an isolated perspective view of the second venturi insert110of the dual-burner assembly100ofFIGS.1-5.FIG.12is a first isolated perspective view of the valve114of the dual-burner assembly100ofFIGS.1-5.FIG.13is a second isolated perspective view of the valve114of the dual-burner assembly100ofFIGS.1-5.

The first burner tube102ofFIGS.1-8includes an example front end118, an example rear end120, an example right wall122, an example left wall202, an example upper wall124, and an example lower wall302. The rear end120of the first burner tube102is located opposite the front end118of the first burner tube102. The right wall122of the first burner tube102extends between the front end118and the rear end120of the first burner tube102. The left wall202of the first burner tube102is located opposite the right wall122of the first burner tube102and extends between the front end118and the rear end120of the first burner tube102. The upper wall124of the first burner tube102extends between the front end118and the rear end120of the first burner tube102, and also extends between the right wall122and the left wall202of the first burner tube102. The lower wall302of the first burner tube102is located opposite the upper wall124of the first burner tube102, extends between the front end118and the rear end120of the first burner tube102, and also extends between the right wall122and the left wall202of the first burner tube102.

The first burner tube102has a length (L1) extending from the front end118to the rear end120of the first burner tube102. In the illustrated example ofFIGS.1-8, the first burner tube102has a substantially linear shape (e.g., free of curves and/or bends) along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. In other examples, the first burner tube102can alternatively include one or more curve(s) and/or bend(s) along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102.

The first burner tube102has a width (W1) extending from the right wall122to the left wall202of the first burner tube102. In the illustrated example ofFIGS.1-8, the width (W1) of the first burner tube102is substantially constant (e.g., non-varying) along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. In other examples, the width (W1) of the first burner tube102may vary along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. The width (W1) of the first burner tube102is preferably between 0.500 and 0.750 inches. In the illustrated example ofFIGS.1-8for instance, the width (W1) of the first burner tube102is approximately 0.550 inches. In other examples, the width (W1) of the first burner tube102can be less than 0.500 inches. In still other examples, the width (W1) of the first burner tube102can be greater than 0.750 inches.

The right wall122, the left wall202, the upper wall124, and the lower wall302of the first burner tube102define an interior of the first burner tube102. In the illustrated example ofFIGS.1-8, the interior of the first burner tube102has a substantially rectangular cross-sectional shape (e.g., defined by a plane parallel to the width (W1) of the first burner tube102). In other examples, the interior of the first burner tube102can alternatively have a non-rectangular cross-sectional shape, including for example a circular cross-sectional shape, an elliptical cross-sectional shape, or a triangular cross-sectional shape, among others.

In some examples, the cross-sectional shape and/or the associated cross-sectional area of the interior of the first burner tube102remains constant along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. In other examples, the cross-sectional shape and/or the associated cross-sectional area of the interior of the first burner tube102changes (e.g., increases or decreases) along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. Changes in the cross-sectional shape and/or the associated cross-sectional area of the interior of the first burner tube102may be present, for example, when one or more of the right wall122, the left wall202, the upper wall124, or the lower wall302of the first burner tube102tapers along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102.

The front end118of the first burner tube102ofFIGS.1-8includes an example opening802configured to receive the first venturi insert104of the dual-burner assembly100. In this regard, the first venturi insert104of the dual-burner assembly100is positioned and/or located within the first burner tube102of the dual-burner assembly100proximate the front end118of the first burner tube102. The first venturi insert104includes an example front face702having an example opening704(e.g., a through hole) extending therethrough. The opening704of the first venturi insert104is configured to receive an example first outlet port204of the valve114of the dual-burner assembly100, as further described herein.

The first venturi insert104is configured to receive gas from the first outlet port204of the valve114, and to receive combustion air from an example opening804formed in the right wall122of the first burner tube102and/or from an example opening806formed in the left wall202of the first burner tube102. The first venturi insert104increases the velocity of the received gas/air mixture as the mixture travels down the length (L1) of the first burner tube102from the front end118toward the rear end120of the first burner tube102.

The first air shutter106of the dual-burner assembly100is coupled to the first burner tube102of the dual-burner assembly100proximate the front end118of the first burner tube102. The first air shutter106is adjustable along the length (L1) of the first burner tube102such that the first air shutter106can increase or decrease the size of the opening804formed in the right wall122of the first burner tube102and/or the size of the opening806formed in the left wall202of the first burner tube102. Positional adjustments of the first air shutter106relative to the first burner tube102accordingly modify the amount of combustion air in the gas/air mixture traveling through the first burner tube102.

The upper wall124of the first burner tube102includes example ports126(e.g., through holes) extending therethrough. Flames generated and/or located within the interior of the first burner tube102are emitted from the first burner tube102through respective ones of the ports126. In the illustrated example ofFIGS.1-8, respective ones of the ports126are aligned with one another, with the respective ones of the ports126being spaced apart from one another along the length (L1) of the first burner tube102between the front end118and the rear end120of the first burner tube102. In other examples, respective ones of the ports126can alternatively be arranged in a different pattern relative to that shown inFIGS.1-8, and/or can alternatively be located on the right wall122and/or the left wall202of the first burner tube102.

The first burner tube102ofFIGS.1-8is configured to have an associated maximum heat output. In some examples, the maximum heat output of the first burner tube102is preferably between 10,000 and 15,000 BTU/hour. In the illustrated example ofFIGS.1-8for instance, the maximum heat output of the first burner tube102is approximately 13,500 BTU/hour. In other examples, the maximum heat output of the first burner tube102can be less than 10,000 BTU/hour. In still other examples, the maximum heat output of the first burner tube102can be greater than 15,000 BTU/hour.

The second burner tube108ofFIGS.1-7and10includes an example front end128, an example rear end130, an example right wall132, an example left wall206, an example upper wall134, and an example lower wall304. The rear end130of the second burner tube108is located opposite the front end128of the second burner tube108. The right wall132of the second burner tube108extends between the front end128and the rear end130of the second burner tube108. The left wall206of the second burner tube108is located opposite the right wall132of the second burner tube108and extends between the front end128and the rear end130of the second burner tube108. The upper wall134of the second burner tube108extends between the front end128and the rear end130of the second burner tube108, and also extends between the right wall132and the left wall206of the second burner tube108. The lower wall304of the second burner tube108is located opposite the upper wall134of the second burner tube108, extends between the front end128and the rear end130of the second burner tube108, and also extends between the right wall132and the left wall206of the second burner tube108.

The second burner tube108has a length (L2) extending from the front end128to the rear end130of the second burner tube108. In the illustrated example ofFIGS.1-7and10, the second burner tube108has a substantially linear shape (e.g., free of curves and/or bends) along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. In other examples, the second burner tube108can alternatively include one or more curve(s) and/or bend(s) along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108.

The second burner tube108has a width (W2) extending from the right wall132to the left wall206of the second burner tube108. In the illustrated example ofFIGS.1-7and10, the width (W2) of the second burner tube108is substantially constant (e.g., non-varying) along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. In other examples, the width (W2) of the second burner tube108may vary along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. The width (W2) of the second burner tube108is preferably between 0.500 and 0.750 inches. In the illustrated example ofFIGS.1-7and10for instance, the width (W2) of the second burner tube108is approximately 0.550 inches. In other examples, the width (W2) of the second burner tube108can be less than 0.500 inches. In still other examples, the width (W2) of the second burner tube108can be greater than 0.750 inches.

The right wall132, the left wall206, the upper wall134, and the lower wall304of the second burner tube108define an interior of the second burner tube108. In the illustrated example ofFIGS.1-7and10, the interior of the second burner tube108has a substantially rectangular cross-sectional shape (e.g., defined by a plane parallel to the width (W2) of the second burner tube108). In other examples, the interior of the second burner tube108can alternatively have a non-rectangular cross-sectional shape, including for example a circular cross-sectional shape, an elliptical cross-sectional shape, or a triangular cross-sectional shape, among others.

In some examples, the cross-sectional shape and/or the associated cross-sectional area of the interior of the second burner tube108remains constant along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. In other examples, the cross-sectional shape and/or the associated cross-sectional area of the interior of the second burner tube108changes (e.g., increases or decreases) along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. Changes in the cross-sectional shape and/or the associated cross-sectional area of the interior of the second burner tube108may be present, for example, when one or more of the right wall132, the left wall206, the upper wall134, or the lower wall304of the second burner tube108tapers along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108.

The front end128of the second burner tube108ofFIGS.1-7and10includes an example opening1002configured to receive the second venturi insert110of the dual-burner assembly100. In this regard, the second venturi insert110of the dual-burner assembly100is positioned and/or located within the second burner tube108of the dual-burner assembly100proximate the front end128of the second burner tube108. The second venturi insert110includes an example front face706having an example opening708(e.g., a through hole) extending therethrough. The opening708of the second venturi insert110is configured to receive an example second outlet port208of the valve114of the dual-burner assembly100, as further described herein.

The second venturi insert110is configured to receive gas from the second outlet port208of the valve114, and to receive combustion air from an example opening1004formed in the right wall132of the second burner tube108and/or from an example opening1006formed in the left wall206of the second burner tube108. The second venturi insert110increases the velocity of the received gas/air mixture as the mixture travels down the length (L2) of the second burner tube108from the front end128toward the rear end130of the second burner tube108.

The second air shutter112of the dual-burner assembly100is coupled to the second burner tube108of the dual-burner assembly100proximate the front end128of the second burner tube108. The second air shutter112is adjustable along the length (L2) of the second burner tube108such that the second air shutter112can increase or decrease the size of the opening1004formed in the right wall132of the second burner tube108and/or the size of the opening1006formed in the left wall206of the second burner tube108. Positional adjustments of the second air shutter112relative to the second burner tube108accordingly modify the amount of combustion air in the gas/air mixture traveling through the second burner tube108.

The upper wall134of the second burner tube108includes example ports136(e.g., through holes) extending therethrough. Flames generated and/or located within the interior of the second burner tube108are emitted from the second burner tube108through respective ones of the ports136. In the illustrated example ofFIGS.1-7and10, respective ones of the ports136are aligned with one another, with the respective ones of the ports136being spaced apart from one another along the length (L2) of the second burner tube108between the front end128and the rear end130of the second burner tube108. In other examples, respective ones of the ports136can alternatively be arranged in a different pattern relative to that shown inFIGS.1-7and10, and/or can alternatively be located on the right wall132and/or the left wall206of the second burner tube108.

The second burner tube108ofFIGS.1-7and10is configured to have an associated maximum heat output. In some examples, the maximum heat output of the second burner tube108is preferably between 3,000 and 5,000 BTU/hour. In the illustrated example ofFIGS.1-7and10for instance, the maximum heat output of the second burner tube108is approximately 3,500 BTU/hour. In other examples, the maximum heat output of the second burner tube108can be less than 3,000 BTU/hour. In still other examples, the maximum heat output of the second burner tube108can be greater than 5,000 BTU/hour.

In the illustrated example ofFIGS.1-5, the dual-burner assembly100is configured such that the maximum heat output of the second burner tube108is less than the maximum heat output of the first burner tube102. In other examples, the dual-burner assembly100can alternatively be configured such that the maximum heat output of the second burner tube108is greater than the maximum heat output of the first burner tube102. In still other examples, the dual-burner assembly100can alternatively be configured such that the maximum heat output of the second burner tube108is approximately equal to the maximum heat output of the first burner tube102.

In the illustrated example ofFIGS.1-5, the first burner tube102has a relatively higher maximum heat output of 13,500 BTU/hour, while the second burner tube108has a relatively lower maximum heat output of only 3,500 BTU/hour. In such an example, the dual-burner assembly100is configured to operate with a low heat output of approximately 3,500 BTU/hour and a high heat output of approximately 17,000 BTU/hour, thereby providing an operational heating range of approximately 13,500 BTU/hour (e.g., 17,000-3,500=13,500), and a turndown ratio of approximately 4.86 (e.g., 17,000/3,500=4.86). In some examples, the operational heating range of the dual-burner assembly100is preferably no less than 10,000 BTU/hour, and the turndown ratio of the dual-burner assembly100is preferably no less than 3.00. In other examples, the operational heating range of the dual-burner assembly100can be less than 10,000 BTU/hour, and/or the turndown ratio of the dual-burner assembly100can be less than 3.00.

The valve114ofFIGS.1-6,12and13is structured as a single-input, dual-output valve. In this regard, the valve114includes the first outlet port204, the second outlet port208, and an example inlet port306. The first outlet port204of the valve114extends through the opening704of the first venturi insert104and/or through the opening802of the front end118of the first burner tube102such that the first outlet port204if the valve114is in fluid communication with the interior of the first burner tube102. Similarly, the second outlet port208of the valve114extends through the opening708of the second venturi insert110and/or through the opening1002of the front end128of the second burner tube108such that the second outlet port208of the valve114is in fluid communication with the interior of the second burner tube108.

The inlet port306of the valve114is in selective fluid communication with the first outlet port204and the second outlet port208of the valve114, with such selective fluid communication being determined based on the position of a flow control member located within an example body308of the valve114. For example, the flow control member of the valve114can be placed in a first position such that gas (e.g., received from a gas distribution manifold) entering and/or passing through the inlet port306of the valve114is blocked and/or otherwise prevented from passing to both the first outlet port204and the second outlet port208of the valve114(e.g., an OFF state of the dual-burner assembly100). As another example, the flow control member of the valve114can be placed in a second position such that gas entering and/or passing through the inlet port306of the valve114passes fully to both the first outlet port204and the second outlet port208of the valve114(e.g., a HIGH state of the dual-burner assembly100). As another example, the flow control member of the valve114can be placed in a third position such that gas entering and/or passing through the inlet port306of the valve114passes only partially to the first outlet port204of the valve114, but passes fully to the second outlet port208of the valve114(e.g., a MEDIUM state of the dual-burner assembly100). As another example, the flow control member of the valve114can be placed in a fourth position such that gas entering and/or passing through the inlet port306of the valve114is blocked and/or otherwise prevented from passing to the first outlet port204of the valve114, but passes fully to the second outlet port208of the valve114(e.g., a LOW state of the dual-burner assembly100).

The valve114ofFIGS.1-6,12, and13further includes an example stem310that is mechanically coupled to the flow control member of the valve114. Movement of the flow control member of the valve114between the above-described positions can be facilitated by rotating the stem310of the valve114to a position that corresponds to the desired use position of the flow control member of the valve114. In this regard, the knob116ofFIGS.1-5includes an example shaft312configured to receive the stem310of the valve114such that the knob116is mechanically coupled to the stem310and/or operatively coupled to the flow control member of the valve114. Thus, movement of the flow control member of the valve114between the above-described positions can be facilitated by rotating the knob116to a position that corresponds to the desired use position of the flow control member of the valve114. In some examples, the knob116ofFIGS.1-5includes indicia, markings, and/or labeling configured to assist a user in determining when the knob116is rotated to a position corresponding to the desired use position of the flow control member of the valve114. For example, the knob116can include indicia, markings, and/or labeling configured to assist a user in determining when the knob116is rotated to a position corresponding to the OFF state, the HIGH state, the MEDIUM state, and/or the LOW state of the flow control member of the valve114and/or, more generally, of the dual-burner assembly100.

As shown inFIGS.1-7, the first burner tube102and the second burner tube108of the dual-burner assembly100are positioned in a side-by-side arrangement relative to one another such that the first burner tube102is parallel to the second burner tube108. The first burner tube102and the second burner tube108are configured to be spaced apart from one another by a distance (D) measured between the left wall202of the first burner tube102and the right wall132of the second burner tube108. In some examples, the distance (D) between the first burner tube102and the second burner tube108is preferably between 0.187 and 0.750 inches. In the illustrated example ofFIGS.1-7for instance, the distance (D) between the first burner tube102and the second burner tube108is approximately 0.300 inches. In other examples, the distance (D) between the first burner tube102and the second burner tube108can be less than 0.187 inches. In still other examples, the distance (D) between the first burner tube102and the second burner tube108can be greater than 0.750 inches.

In view of their side-by-side arrangement described above, the first burner tube102and the second burner tube108of the dual-burner assembly100have a combined width (W) (e.g., a combined lateral extent) measured from the right wall122of the first burner tube102to the left wall206of the second burner tube108. The combined width (W) of the first burner tube102and the second burner tube108can alternatively be measured as the sum of the width (W1) of the first burner tube102, the width (W2) of the second burner tube108, and the distance (D) between the first burner tube102and the second burner tube108. In some examples, the combined width (W) of the first burner tube102and the second burner tube108is preferably between 1.367 and 2.000 inches. In the illustrated example ofFIGS.1-7for instance, the combined width (W) of the first burner tube102and the second burner tube108is approximately 1.490 inches. In other examples, the combined width (W) of the first burner tube102and the second burner tube108can be less than 1.367 inches. In still other examples, the combined width (W) of the first burner tube102and the second burner tube108can be greater than 2.000 inches.

The dual-burner assembly100ofFIGS.1-7further includes example bridging flanges138configured to couple the first burner tube102of the dual-burner assembly100to the second burner tube108of the dual-burner assembly100. In the illustrated example ofFIGS.1-7, two separate (e.g., spaced apart) bridging flanges138are shown extending between the left wall202of the first burner tube102and the right wall132of the second burner tube108. In other examples, the dual-burner assembly100can include a number of bridging flanges138other than two (e.g., 1, 3, 4, etc.). In still other examples, the dual-burner assembly100may not include any bridging flanges138.

The dual-burner assembly100ofFIGS.1-7further includes example front mounting brackets140configured to couple the first burner tube102of the dual-burner assembly100and/or the second burner tube108of the dual-burner assembly100to a component (e.g., a cookbox, a manifold, a control panel, a trim panel, etc.) of a grill implementing the dual-burner assembly100. In the illustrated example ofFIGS.1-7, a first one of the front mounting brackets140is shown coupled to the upper wall124of the first burner tube102, and a second one of the front mounting brackets140is shown coupled to the upper wall134of the second burner tube108. In other examples, the first one of the front mounting brackets140coupled to the upper wall124of the first burner tube102, and/or the second one of the front mounting brackets140coupled to the upper wall134of the second burner tube108can be omitted from the dual-burner assembly100.

The dual-burner assembly100ofFIGS.1-7further includes an example rear mounting bracket142configured to couple the first burner tube102of the dual-burner assembly100and/or the second burner tube108of the dual-burner assembly100to a component (e.g., a cookbox, a trim panel, etc.) of a grill implementing the dual-burner assembly100. In the illustrated example ofFIGS.1-7, a tab extending from the rear end120of the first burner tube102is coupled to (e.g., disposed within) a slot formed in the rear mounting bracket142. In other examples, the rear end130of the second burner tube108can additionally or alternatively be coupled to the rear mounting bracket142. In still other examples, the rear mounting bracket142can be omitted from the dual-burner assembly100.

FIG.14is a perspective view of an example gas burner assembly1400including the dual-burner assembly100ofFIGS.1-5.FIG.15is a top view of the gas burner assembly1400ofFIG.14. The gas burner assembly1400ofFIGS.14-15includes three instances of the above-described dual-burner assembly100ofFIGS.1-5. More specifically, the gas burner assembly1400ofFIGS.14-15includes an example right dual-burner assembly1402, and example central dual-burner assembly1404, and an example left dual-burner assembly1406, each of which is implemented in a manner consistent with the dual-burner assembly100ofFIGS.1-5described above. In other examples, the gas burner assembly1400ofFIGS.14-15can alternatively include a different number (e.g., 1, 2, 4, 5, etc.) of instances of the dual-burner assembly100ofFIGS.1-5. Furthermore, in some examples, the gas burner assembly1400ofFIGS.14-15can include one or more other type(s) of burner assemblies in addition to those shown inFIGS.14-15. For example, the gas burner assembly1400can include one or more other type(s) of burner assemblies positioned between the right dual-burner assembly1402and the central dual-burner assembly1404, between the central dual-burner assembly1404and the left dual-burner assembly1406, and/or between the right dual-burner assembly1402and the left dual-burner assembly1406.

In the illustrated example ofFIGS.14-15, the right dual-burner assembly1402is configured to be spaced apart from the central dual-burner assembly1404by a first distance (D1), and the central dual-burner assembly1404is configured to be spaced apart from the left dual-burner assembly1406by a second distance (D2). In some examples, the first distance (D1) and the second distance (D2) are, respectively, preferably at least 2.00 inches. In the illustrated example ofFIGS.14-15for instance, the first distance (D1) and the second distance (D2) are, respectively, approximately 7.00 inches.

As shown inFIGS.14-15, the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406are respectively coupled to (e.g., in fluid communication with) an example gas distribution manifold1408of the gas burner assembly1400. In this regard, each of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406includes an instance of the above-described valve114of the dual-burner assembly100, with the inlet port306of the valve114being coupled to (e.g., in fluid communication with) the gas distribution manifold1408of the gas burner assembly1400ofFIGS.14-15. The gas distribution manifold1408includes an example inlet port1410configured to receive pressurized gas from a gas source (e.g., a propane cylinder, a gas line, etc.). The gas distribution manifold1408routes and/or distributes pressurized gas received at the inlet port1410of the gas distribution manifold1408to each of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406of the gas burner assembly1400ofFIGS.14-15.

FIG.16is a perspective view of the gas burner assembly1400ofFIGS.14and15, with example grease deflection bars1600shown positioned over each dual-burner assembly100of the gas burner assembly1400.FIG.17is a top view of the gas burner assembly1400ofFIGS.14-16, with the grease deflection bars1600ofFIG.16shown positioned over each dual-burner assembly100of the gas burner assembly1400. In the illustrated example ofFIGS.16-17, the grease deflection bars1600includes an example first grease deflection bar1602positioned over the right dual-burner assembly1402of the gas burner assembly1400, an example second grease deflection bar1604positioned over the central dual-burner assembly1404of the gas burner assembly1400, and an example third grease deflection bar1606positioned over the left dual-burner assembly1406of the gas burner assembly1400. In other examples, the first grease deflection bar1602, the second grease deflection bar1604, or the third grease deflection bar1606can be omitted from among the illustrated grease deflection bars1600ofFIGS.16-17. In still other examples, the grease deflection bars1600can include one or more other grease deflection bar(s) in addition to the first grease deflection bar1602, the second grease deflection bar1604, and the third grease deflection bar1606shown inFIGS.16-17.

The grease deflection bars1600ofFIGS.16-17are respectively configured to prevent grease from dripping onto and/or into the ports126of the first burner tube102and the ports136of the second burner tube108included among each corresponding dual-burner assembly100of the gas burner assembly1400ofFIGS.14-17. In the illustrated example ofFIGS.16-17, the first grease deflection bar1602, the second grease deflection bar1604, and the third grease deflection bar1606are respectively configured to have an inverted V-shaped cross-sectional profile, including a peak that is generally centered over and oriented away from the corresponding dual-burner assembly above which the grease deflection bar is positioned. As further shown inFIGS.16-17, the first grease deflection bar1602, the second grease deflection bar1604, and the third grease deflection bar1606are respectively configured to have a width (Wbar) (e.g., a lateral extent) that exceeds the combined width (W) (e.g., the combined lateral extent) of the corresponding dual-burner assembly over which the grease deflection bar is positioned.

For example, as shown inFIGS.16-17, the width (Wbar) of the first grease deflection bar1602exceeds the combined width (W) of the right dual-burner assembly1402over which the first grease deflection bar1602is positioned. The ports126of the first burner tube102of the right dual-burner assembly1402and the ports136of the second burner tube108of the right dual-burner assembly1402are accordingly both covered by the first grease deflection bar1602. Similarly, the width (Wbar) of the second grease deflection bar1604exceeds the combined width (W) of the central dual-burner assembly1404over which the second grease deflection bar1604is positioned. The ports126of the first burner tube102of the central dual-burner assembly1404and the ports136of the second burner tube108of the central dual-burner assembly1404are accordingly both covered by the second grease deflection bar1604. Similarly, the width (Wbar) of the third grease deflection bar1606exceeds the combined width (W) of the left dual-burner assembly1406over which the third grease deflection bar1606is positioned. The ports126of the first burner tube102of the left dual-burner assembly1406and the ports136of the second burner tube108of the left dual-burner assembly1406are accordingly both covered by the third grease deflection bar1606.

FIG.18is a perspective view of an example cookbox1800of a gas grill, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.FIG.19is a top view of the cookbox1800ofFIG.18, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.FIG.20is a top view of the cookbox1800ofFIGS.18and19, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800, and with the cooking grate(s) (e.g., as described below) of the cookbox1800removed.FIG.21is a top view of the cookbox1800ofFIGS.18-20, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800, and with the cooking grate(s) (e.g., as described below) and the grease deflection bars (e.g., as described below) of the cookbox1800removed.FIG.22is a cross-sectional view of the cookbox1800ofFIGS.18-21taken along section A-A ofFIG.19, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.FIG.23is a perspective cross-sectional view of the cookbox1800ofFIGS.18-22taken along section A-A ofFIG.19, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.FIG.24is a cross-sectional view of the cookbox1800ofFIGS.18-23taken along section B-B ofFIG.19, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.FIG.25is a perspective cross-sectional view of the cookbox1800ofFIGS.18-24taken along section B-B ofFIG.19, with the gas burner assembly1400ofFIGS.14-17shown coupled to the cookbox1800.

In the illustrated example ofFIGS.18-25, the cookbox1800includes an example front wall1802, an example rear wall1804spaced apart from the front wall1802, an example right sidewall1806extending between the front wall1802and the rear wall1804, and an example left sidewall1808spaced apart from the right sidewall1806and extending between the front wall1802and the rear wall1804. The front wall1802of the cookbox1800includes example openings1810(e.g., through holes) respectively configured to receive a portion of one of the dual-burner assemblies100(e.g., the right dual-burner assembly1402, the central dual-burner assembly1404, or the left dual-burner assembly1406) of the gas burner assembly1400.

The cookbox1800ofFIGS.18-25houses, carries, and/or otherwise includes a substantial portion of the gas burner assembly1400ofFIGS.14-17. For example, as shown inFIGS.18-25, the rear mounting bracket142, along with a substantial portion (e.g., including all of the ports126) of the first burner tube102as well as a substantial portion (e.g., including all of the ports136) of the second burner tube108of respective ones of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406of the gas burner assembly1400are located within the cookbox1800. The valve114and the knob116of respective ones of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406of the gas burner assembly1400are located outside of the cookbox1800at a position forward of the front wall1802of the cookbox1800. The gas distribution manifold1408of the gas burner assembly1400is also located outside of the cookbox1800at a position forward of the front wall1802of the cookbox1800.

The cookbox1800ofFIGS.18-25also houses, carries, and/or otherwise includes respective ones of the grease deflection bars1600ofFIGS.16-17, including but not limited to the first grease deflection bar1602, the second grease deflection bar1604, and the third grease deflection bar1606ofFIGS.16-17described above. As shown inFIGS.18-25, the first grease deflection bar1602is positioned and/or located within the cookbox1800above the right dual-burner assembly1402such that the ports126of the first burner tube102of the right dual-burner assembly1402and the ports136of the second burner tube108of the right dual-burner assembly1402are covered by the first grease deflection bar1602. Similarly, the second grease deflection bar1604is positioned and/or located within the cookbox1800above the central dual-burner assembly1404such that the ports126of the first burner tube102of the central dual-burner assembly1404and the ports136of the second burner tube108of the central dual-burner assembly1404are covered by the second grease deflection bar1604. Similarly, the third grease deflection bar1606is positioned and/or located within the cookbox1800above the left dual-burner assembly1406such that the ports126of the first burner tube102of the left dual-burner assembly1406and the ports136of the second burner tube108of the left dual-burner assembly1406are covered by the third grease deflection bar1606.

The cookbox1800ofFIGS.18-25also houses, carries, and/or otherwise includes one or more example cooking grate(s)1812located and/or positioned within the cookbox1800above the aforementioned grease deflection bars1600of the cookbox1800. The cooking grate(s)1812is/are configured to form and/or define a substantially flat, planar cooking surface for cooking one or more food item(s) placed thereon. As shown inFIGS.18-19, the cooking grate(s)1812is/are configured to fill, cover, and/or occupy the substantial entirety of the horizontal form factor and/or footprint of the cookbox1800(e.g., as defined by the width and the depth of the cookbox1800). In other examples, the cooking grate(s)1812can instead be configured to fill, cover, and/or occupy a relatively smaller portion and/or percentage (e.g., less than the substantial entirety) of the horizontal form factor and/or footprint of the cookbox1800.

In the illustrated example ofFIGS.18-25, the rear mounting bracket142of respective ones of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406of the gas burner assembly1400is coupled to the rear wall1804of the cookbox1800. The gas distribution manifold1408of the gas burner assembly is coupled to the front wall1802of the cookbox1800via an example manifold mounting bracket1814. As described above, inlet port1410of the gas distribution manifold1408is configured to receive pressurized gas from a gas source (e.g., a propane cylinder, a gas line, etc.) such that the gas distribution manifold1408routes and/or distributes pressurized gas received at the inlet port1410to each of the right dual-burner assembly1402, the central dual-burner assembly1404, and the left dual-burner assembly1406of the gas burner assembly1400.

FIG.26is a partial perspective view of the cookbox1800ofFIGS.18-25including the gas burner assembly1400ofFIGS.14-17, with a dual-burner assembly100of the gas burner assembly1400shown in an example OFF state2600. More specifically, in the illustrated example ofFIG.26, the right dual-burner assembly1402of the gas burner assembly1400is shown in the OFF state2600. It is to be understood, however, that the central dual-burner assembly1404and/or the left dual-burner assembly1406of the gas burner assembly1400can similarly be placed in the illustrated OFF state2600.

In the illustrated example ofFIG.26, the knob116of the right dual-burner assembly1402is positioned at zero degrees (0°). The positioning of the knob116at zero degrees (0°) causes the flow control member of the valve114of the right dual-burner assembly1402to block and/or otherwise prevent gas from passing into both the first burner tube102of the right dual-burner assembly1402and the second burner tube108of the right dual-burner assembly1402. The heat output of the first burner tube102(e.g., the right burner tube) of the right dual-burner assembly1402and the heat output of the second burner tube108(e.g., the left burner tube) of the right dual-burner assembly1402are accordingly both zero (0) BTU/hour when the right dual-burner assembly1402is in the OFF state2600ofFIG.26. The total heat output of the right dual-burner assembly1402is accordingly zero (0) BTU/hour when the right dual-burner assembly1402is in the OFF state2600ofFIG.26.

FIG.27is a partial perspective view of the cookbox1800ofFIGS.18-26including the gas burner assembly1400ofFIGS.14-17, with a dual-burner assembly100of the gas burner assembly1400shown in an example HIGH state2700. More specifically, in the illustrated example ofFIG.27, the right dual-burner assembly1402of the gas burner assembly1400is shown in the HIGH state2700. It is to be understood, however, that the central dual-burner assembly1404and/or the left dual-burner assembly1406of the gas burner assembly1400can similarly be placed in the illustrated HIGH state2700.

In the illustrated example ofFIG.27, the knob116of the right dual-burner assembly1402has been rotated ninety degrees (90°) counter-clockwise from the zero degrees (0°) position associated with the OFF state2600ofFIG.26. The positioning of the knob116at ninety degrees (0°) counter-clockwise from the zero degrees (0°) position causes the flow control member of the valve114of the right dual-burner assembly1402to enable gas to pass fully into both the first burner tube102of the right dual-burner assembly1402and the second burner tube108of the right dual-burner assembly1402. The heat output of the first burner tube102(e.g., the right burner tube) of the right dual-burner assembly1402is 13,500 BTU/hour when the right dual-burner assembly1402is in the HIGH state2700ofFIG.27, and the heat output of the second burner tube108(e.g., the left burner tube) of the right dual-burner assembly1402is 3,500 BTU/hour when the right dual-burner assembly1402is in the HIGH state2700ofFIG.27. The total heat output of the right dual-burner assembly1402is accordingly 17,000 BTU/hour when the right dual-burner assembly1402is in the HIGH state2700ofFIG.27.

FIG.28is a partial perspective view of the cookbox1800ofFIGS.18-27including the gas burner assembly1400ofFIGS.14-17, with a dual-burner assembly100of the gas burner assembly1400shown in an example MEDIUM state2800. More specifically, in the illustrated example ofFIG.28, the right dual-burner assembly1402of the gas burner assembly1400is shown in the MEDIUM state2800. It is to be understood, however, that the central dual-burner assembly1404and/or the left dual-burner assembly1406of the gas burner assembly1400can similarly be placed in the illustrated MEDIUM state2800.

In the illustrated example ofFIG.28, the knob116of the right dual-burner assembly1402has been rotated one hundred and eighty degrees (180°) counter-clockwise from the zero degrees (0°) position associated with the OFF state2600ofFIG.26. The positioning of the knob116at one hundred and eighty degrees (180°) counter-clockwise from the zero degrees (0°) position causes the flow control member of the valve114of the right dual-burner assembly1402to enable gas to pass only partially into the first burner tube102of the right dual-burner assembly1402, and to pass fully into the second burner tube108of the right dual-burner assembly1402. The heat output of the first burner tube102(e.g., the right burner tube) of the right dual-burner assembly1402is 6,000 BTU/hour when the right dual-burner assembly1402is in the MEDIUM state2800ofFIG.28, and the heat output of the second burner tube108(e.g., the left burner tube) of the right dual-burner assembly1402is 3,500 BTU/hour when the right dual-burner assembly1402is in the MEDIUM state2800ofFIG.28. The total heat output of the right dual-burner assembly1402is accordingly 9,500 BTU/hour when the right dual-burner assembly1402is in the MEDIUM state2800ofFIG.28.

FIG.29is a partial perspective view of the cookbox1800ofFIGS.18-28including the gas burner assembly1400ofFIGS.14-17, with a dual-burner assembly100of the gas burner assembly1400shown in an example LOW state2900. More specifically, in the illustrated example ofFIG.29, the right dual-burner assembly1402of the gas burner assembly1400is shown in the LOW state2900. It is to be understood, however, that the central dual-burner assembly1404and/or the left dual-burner assembly1406of the gas burner assembly1400can similarly be placed in the illustrated LOW state2900.

In the illustrated example ofFIG.29, the knob116of the right dual-burner assembly1402has been rotated two hundred and seventy degrees (270°) counter-clockwise from the zero degrees (0°) position associated with the OFF state2600ofFIG.26. The positioning of the knob116at two hundred and seventy degrees (270°) counter-clockwise from the zero degrees (0°) position causes the flow control member of the valve114of the right dual-burner assembly1402to block and/or otherwise prevent gas from passing into the first burner tube102of the right dual-burner assembly1402, and to enable gas to pass fully into the second burner tube108of the right dual-burner assembly1402. The heat output of the first burner tube102(e.g., the right burner tube) of the right dual-burner assembly1402is zero (0) BTU/hour when the right dual-burner assembly1402is in the LOW state2900ofFIG.29, and the heat output of the second burner tube108(e.g., the left burner tube) of the right dual-burner assembly1402is 3,500 BTU/hour when the right dual-burner assembly1402is in the LOW state2900ofFIG.29. The total heat output of the right dual-burner assembly1402is accordingly 3,500 BTU/hour when the right dual-burner assembly1402is in the LOW state2900ofFIG.29.

The specific knob positions, individual burner tube heat outputs, and total dual-burner assembly heat outputs associated with the OFF state2600ofFIG.26, the HIGH state2700ofFIG.27, the MEDIUM state2800ofFIG.28, and the LOW state2900ofFIG.29described above are intended to provide an example implementation one or more of the dual-burner assemblies100(e.g., the right dual-burner assembly1402, the central dual-burner assembly1404, and/or the left dual-burner assembly1406) of the gas burner assembly1400. It is to be understood that different knob positions, different individual burner tube heat outputs, and different total dual-burner assembly heat outputs associated with the OFF state2600ofFIG.26, the HIGH state2700ofFIG.27, the MEDIUM state2800ofFIG.28, and/or the LOW state2900ofFIG.29are within the scope of the invention.

From the foregoing, it will be appreciated that example dual-burner assemblies disclosed herein provide numerous enhancements for gas-fueled outdoor cooking appliances, and particularly for cookboxes of gas grills. The improved operational heating range and turndown ratio associated with the disclosed dual-burner assemblies enable the dual-burner assembly to achieve higher energy levels (and thus higher cook temperatures) as well as lower energy levels (and thus lower cook temperatures) relative to known atmospheric burners. These improvements provide numerous advantages to the gas-fueled outdoor cooking appliance and the user experience associated therewith. For example, the higher energy levels achievable via the disclosed dual-burner assemblies significantly reduce the time needed to preheat the gas-fueled outdoor cooking appliance. As another example, when multiple instances of the disclosed dual-burner assemblies are implemented within a cookbox of a gas grill, the higher energy levels achievable via the disclosed dual-burner assemblies enable the entire cooking surface of the gas grill to be used for high-heat searing. As another example, when multiple instances of the disclosed dual-burner assemblies are implemented within a cookbox of a gas grill, the lower energy levels achievable via the disclosed dual-burner assemblies enable the entire cooking surface of the gas grill to be used for low-heat cooking, including simmering and smoking.

In some examples, a dual-burner assembly for a cookbox of a gas grill is disclosed. In some disclosed examples, the dual-burner assembly comprises a first burner tube having a first maximum heat output. In some disclosed examples, the dual-burner assembly further comprises a second burner tube having a second maximum heat output, the second burner tube spaced apart from the first burner tube by a distance of no more than 0.750 inches, the second maximum heat output being less than the first maximum heat output.

In some disclosed examples, the first burner tube and the second burner tube respectively have a linear shape.

In some disclosed examples, the dual-burner assembly further comprises a bridging flange extending between the first burner tube and the second burner tube, the bridging flange coupling the first burner tube to the second burner tube.

In some disclosed examples, the first maximum heat output is between 10,000 and 15,000 British Thermal Units per hour, and the second maximum heat output is between 3,000 and 5,000 British Thermal Units per hour.

In some disclosed examples, an operational heating range of the dual-burner assembly is no less than 10,000 British Thermal Units per hour.

In some disclosed examples, a turndown ratio of the dual-burner assembly is no less than 3.00.

In some disclosed examples, the dual-burner assembly has a width measured across the first burner tube and the second burner tube, the width of the dual-burner assembly being no more than 2.0 inches.

In some disclosed examples, the dual-burner assembly is configured to be positioned below a grease deflection bar, the grease deflection bar having a width greater than the width of the dual-burner assembly.

In some disclosed examples, the first burner tube includes ports configured to emit flames from the first burner tube, the second burner tube includes ports configured to emit flames from the second burner tube, and the grease deflection bar is configured to cover the ports of the first burner tube and the ports of the second burner tube.

In some disclosed examples, the dual-burner assembly further comprises a valve. In some disclosed examples, the valve includes an inlet port configured to receive pressurized gas, a first outlet port in fluid communication with the first burner tube, a second outlet port in fluid communication with the second burner tube, a flow control member movable to selectively enable the pressurized gas to flow from the inlet port to the first outlet port and to selectively enable the pressurized gas to flow from the inlet port to the second outlet port, and a stem mechanically coupled to the flow control member such that movement of the stem causes a corresponding movement of the flow control member.

In some disclosed examples, the dual-burner assembly further comprises a knob, the knob being mechanically coupled to the stem of the valve such that movement of the knob causes a corresponding movement of the stem.

In some disclosed examples, the dual-burner assembly is operable in each of an off state, a high state, a medium state, and a low state, wherein the knob is movable to different positions to selectively place the dual-burner assembly in corresponding ones of the off state, the high state, the medium state, and the low state.

In some disclosed examples, the dual-burner assembly has a first total heat output associated with the off state, a second total heat output associated with the high state, a third total heat output associated with the medium state, and a fourth total heat output associated with the low state.

In some disclosed examples, the third total heat output is less than the second total heat output, the fourth total heat output is less than the third total heat output, and the first total heat output is less than the fourth total heat output.

In some disclosed examples, the first total heat output is zero British Thermal Units per hour.

In some disclosed examples, the second total heat output is between 13,000 and 20,000 British Thermal Units per hour.

In some disclosed examples, the fourth total heat output is between 3,000 and 5,000 British Thermal Units per hour.

In some examples, an apparatus is disclosed. In some disclosed examples, the apparatus comprises a cookbox of a gas grill, and a dual-burner assembly coupled to the cookbox. In some disclosed examples, the dual-burner assembly includes a first burner tube having a first maximum heat output, and a second burner tube having a second maximum heat output, the second burner tube spaced apart from the first burner tube by a distance of no more than 0.750 inches, the second maximum heat output being less than the first maximum heat output.

In some disclosed examples, the first burner tube and the second burner tube respectively have a linear shape.

In some disclosed examples, the dual-burner assembly further includes a bridging flange extending between the first burner tube and the second burner tube, the bridging flange coupling the first burner tube to the second burner tube.

In some disclosed examples, the first maximum heat output is between 10,000 and 15,000 British Thermal Units per hour, and the second maximum heat output is between 3,000 and 5,000 British Thermal Units per hour.

In some disclosed examples, an operational heating range of the dual-burner assembly is no less than 10,000 British Thermal Units per hour.

In some disclosed examples, a turndown ratio of the dual-burner assembly is no less than 3.00.

In some disclosed examples, the dual-burner assembly has a width measured across the first burner tube and the second burner tube, the width of the dual-burner assembly being no more than 2.0 inches.

In some disclosed examples, the apparatus further comprises a grease deflection bar positioned within the cookbox over the dual-burner assembly, the grease deflection bar having a width greater than the width of the dual-burner assembly.

In some disclosed examples, the first burner tube includes ports configured to emit flames from the first burner tube, the second burner tube includes ports configured to emit flames from the second burner tube, and the grease deflection bar is configured to cover the ports of the first burner tube and the ports of the second burner tube.

In some disclosed examples, the dual-burner assembly further includes a valve, the valve. In some disclosed examples, the valve includes an inlet port configured to receive pressurized gas, a first outlet port in fluid communication with the first burner tube, a second outlet port in fluid communication with the second burner tube, a flow control member movable to selectively enable the pressurized gas to flow from the inlet port to the first outlet port and to selectively enable the pressurized gas to flow from the inlet port to the second outlet port, and a stem mechanically coupled to the flow control member such that movement of the stem causes a corresponding movement of the flow control member.

In some disclosed examples, the dual-burner assembly further includes a knob, the knob being mechanically coupled to the stem of the valve such that movement of the knob causes a corresponding movement of the stem.

In some disclosed examples, the dual-burner assembly is operable in each of an off state, a high state, a medium state, and a low state, and wherein the knob is movable to different positions to selectively place the dual-burner assembly in corresponding ones of the off state, the high state, the medium state, and the low state.

In some disclosed examples, the dual-burner assembly has a first total heat output associated with the off state, a second total heat output associated with the high state, a third total heat output associated with the medium state, and a fourth total heat output associated with the low state.

In some disclosed examples, the third total heat output is less than the second total heat output, the fourth total heat output is less than the third total heat output, and the first total heat output is less than the fourth total heat output.

In some disclosed examples, the first total heat output is zero British Thermal Units per hour.

In some disclosed examples, the second total heat output is between 13,000 and 20,000 British Thermal Units per hour.

In some disclosed examples, the fourth total heat output is between 3,000 and 5,000 British Thermal Units per hour.