A knob assembly includes a front panel, a knob located at a front panel of an appliance and configured to rotate based on operation by a user, a valve shaft that is coupled to the knob and that extends through the front panel, a valve connected to the valve shaft and configured to control supply of gas to the appliance, and a knob sensor configured to detect a rotational position of the valve shaft. The valve shaft is configured to control the valve to adjust a flow rate of gas based on rotation of the valve shaft.

Systems and methods for operating a gas-fired appliance such as a gas-fired cooking grill are provided. An embodiment of the system includes a gas burner for heating a chamber of the gas-fired appliance. The system includes a first valve associated with the gas burner to control a gas flow to the gas burner. The system includes a second valve configured to controllably supply gas to the gas burner via the first valve. The second valve is automatically adjustable based on a desired temperature of the chamber and an actual temperature of the chamber.

A multi-outlet channel combination gas valve includes a valve body, a solenoid valve and a flow regulating mechanism. The valve body has a multiple of air outlets, at least two outlet channels formed between each air outlet and an air inlet of the valve body, a regulating port disposed in the at least two outlet channels, and the flow regulating mechanism can regulate the gas flow passing through each regulating port of the valve body at the same time, and a solenoid valve with a dual-coil electromagnet structure. When the valve is opened, a relatively larger current is passed, and then a very small current will be provided thereafter to maintain an operation by low power consumption. Therefore, this gas valve can be used without a mains power, and a low-level regulating structure is provided for presetting a low-level flow of each air outlet.

A control gas ball valve for high pressure gas cooking appliances provides a linear surface slot along its rotation direction. When turned by a control knob and enters a gas inlet, the said surface slot is able to channel gas input to a hole that connects said surface slot to the center of the valve ball. The gas in the center of the valve ball is directed away to a burner for cooking purposes. The said linear surface slot is able to provide constant flowrate slope for continuously variable power adjustment and a maximum power plateau. These are the most desirable features in residential cooking.

A gas cooktop appliance includes a control panel and a fuel supply line. A gas valve is positioned on the fuel supply line. A bracket includes a top bracket portion extending over a top of the fuel supply line. A bottom bracket portion extends under a bottom of the fuel supply line. The bottom bracket portion is mounted to the top bracket portion. A mounting flange is connected to one or both of the top and bottom bracket portions. The mounting flange is positioned at and attached to a rear surface of the control panel that faces the fuel supply line and the gas valve.

A fuel spray nozzle for a gas turbine engine, the fuel spray nozzle arranged to mix fuel and air and provide the mixture to a combustor of the engine and including: a first fuel supply conduit arranged to provide fuel to be mixed with air in a first ratio; a second fuel supply conduit arranged to provide fuel to be mixed with air in a second ratio, having a lower proportion of fuel than the first ratio; and a staging valve arranged to control the relative proportions of fuel provided through the first fuel supply conduit and the second fuel supply conduit, such that an increase or decrease in the flow in the first fuel supply conduit is accompanied by a corresponding decrease or increase in the flow in the second fuel supply conduit.

A knob assembly for a gas cooktop may include a knob configured to control a flow of gas from a burner of a cooktop starting at a resting position, the knob defining a hollow interior and having a support cylinder extending vertically through the hollow interior, wherein the support cylinder includes a projection flap protruding therefrom, an inner lock ring arranged at least partially within the hollow interior of the knob and having a chamfered region defining a ring opening adjacent an inclined portion, where the opening is configured to selectively receive the projection flap in response to depression of the knob and where the projection flap slides along the inclined portion in response to subsequent rotation of the knob, the inclined portion imparting frictional resistance on the projection flap to prevent against unintentional rotation of the knob.

A quick-disconnect gas pipeline comprises a quick-disconnect device (QDD) which comprises a QDD male end and a QDD female end, and a gas hose. The QDD male end is connected to the gas pipeline inside the heating system and the QDD female end is connected to the gas hose outside the heating system. When the heating system is not used, it is easy to disconnect the QDD to prevent people from tripping over the long gas pipeline.

An all-purpose gas stove structure capable of increasing its air intake includes an all-purpose opening-covering case, an extended supporting frame, and at least one gas nozzle. The all-purpose opening-covering case includes an opening-covering case body for covering the heat source-receiving opening of a roasting/grilling device completely, and a gas controller with a gas operation unit for controlling the state of communication between gas input and output ends. The extended supporting frame is a box with a protective lid, is coupled to the inner side of the opening-covering case body at one end, and has a stove burner opening at the opposite end. The lateral walls of the protective lid are formed with vent holes. The gas nozzle is provided on the inner side of the stove burner opening. The all-purpose gas stove structure allows a ceramic roasting/grilling device to have a higher air intake and therefore produce higher heat.

Portable grills are disclosed. An example portable grill movable between an erected configuration and a collapsed configuration includes a frame and a leg unit coupled to the frame. The leg unit includes a first leg, a second leg spaced apart from the first leg, and a foldable foot pivotally coupled to and extending between the first and second legs. The foldable foot is movable relative to the first and second legs between an unfolded configuration and a folded configuration. The foldable foot contacts an underlying surface to support the portable grill when the foldable foot is unfolded and the portable grill is erected and oriented horizontally relative to the underlying surface. The foldable foot provides a handle by which the portable grill can be picked up when the foldable foot is folded and the portable grill is collapsed and oriented horizontally relative to the underlying surface.