Torch
AssigneeNewell Operating Company
InventorsRoger Palmer, Mike Ridley, Al Hyde
Life of this patent
Estimating the term…
Abstract
A torch suitable for use in recreational applications, such as with patios or decks, includes a gas cylinder, a holder for the cylinder, a pole to support the holder and a burner for producing a stable, visible flame. The burner includes one or more holes for injecting primary air near a flow-controlled gas orifice and a burn tip spaced from the orifice. A bowl is mounted about the burn tip and is preferably shaped for providing wind resistance and admitting secondary air at its exit to produce a stable, visible flame. In the preferred embodiment, the enclosure is made from plastic, and has a socket for receiving the pole. An oil, such as citronella oil, may be mixed with the propane or other gas in the cylinder to scent the area in which the torch is used.
Claims19
A torch for recreational use comprising:
- an orifice tube having a gas orifice and a valve for regulating a gas flowing through the gas orifice;
- a flame holding structure including a cup with a fully opened upper end and a second tube coupled to the cup and to the orifice tube including an end at said cup having an internal diameter larger than an internal diameter at an opposite end, the second tube having at least one primary air hole proximate the gas orifice for admitting into the flame holding structure only an amount of air sufficient to support combustion and to produce a stable, visible flame;
- and
- a gas source for supplying the gas to the orifice tube.
A torch for recreational use comprising:
- a burner assembly including a burn tube coupled at a first end to a burn tip and at a second end to an orifice tube, the orifice tube having a gas orifice and a valve for regulating a gas flowing through the gas orifice, the burn tube having at least one primary air hole proximate the gas orifice for admitting into the burn tube an amount of air necessary to produce a stable, visible flame;
- a cup coupled to the burn tube of the burner assembly at an inlet area and having an open end with an outer rim, the outer rim having a diameter substantially larger than a diameter of the inlet area, an outlet of said burn tube including a sintered flame holder at said inlet area;
- and
- a gas source coupled to the orifice tube for supplying the gas to the burner assembly.
A torch for recreational use comprising:
- an orifice tube having a gas orifice and a valve for regulating a gas flowing through the gas orifice;
- a flame holding structure coupled to the orifice tube and having a cup with a fully open upper end and a burn tube, the burn tube having at least one primary air hole proximate the gas orifice for admitting into the flame holding structure only an amount of air sufficient to support combustion and to produce a stable, visible flame, wherein the burn tube includes a burn tip coupled to the cup, the burn tip including an end having an internal diameter larger than an internal diameter of the burn tube, and wherein the gas orifice has a first area and the at least one primary air hole has a combined second area, the ratio of the first area to the second area ranging between approximately 0.002 and 0.004;
- and
- a gas source for supplying the gas to the orifice tube.
Dependencies are inferred from the claim text.