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US 2004/0175664 A1Published application
Flashback arrestor for use with head of oxy-fuel torch
AssigneeThe ESAB Group, Inc.
InventorsNigel Parkin, John Onorato, Paul Mercuri
Life of this patent
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Abstract
Flashback protection is provided in or proximate the head of a cutting torch by a fitting, which can be in the form of an adapter or a cutting tip for mounting to the head. The fitting includes a body and porous structure that is preferably carried by the body and is a distinct component from the body. The porous structure has a multiplicity of convolute passageways extending therethrough for restricting flashback.
Claims37
A cutting torch capable of restricting flashback, comprising:
- a head including an interior surface extending around and defining a head cavity, an oxygen port that is open to the head cavity and is for receiving oxygen from an oxygen supply and supplying oxygen to the head cavity, and a fuel port that is open to the head cavity and is for receiving fuel from a fuel supply and supplying fuel to the head cavity;
- an adapter having a body mounted to the head, wherein the adapter is mounted to the head by engaging threads of the body to threads of head and rotating the head relative to the body through a plurality of revolutions in a first direction, whereby the body can be unmounted from the head by causing relative rotation between the head and the body through a plurality of revolutions in a second direction which is opposite from the first direction, wherein the adapter defines at least one fuel passageway that is in communication with the fuel port for receiving fuel from the fuel port, the adapter further includes a porous structure that is a distinct component from the body and has a multiplicity of convolute passageways extending therethrough, the porous structure is carried by the body so that the porous structure rotates with the body through the respective plurality of revolutions while the body is being mounted to and unmounted from the head, and the porous structure is positioned in the fuel passageway to restrict flashback from entering the fuel port of the head, and wherein the body has an internal surface that extends around an axis to define an axially extending bore that is open at opposite ends of the body;
- and
- a cutting tip mounted to the head via the adapter and extending through the bore of the body, for discharging the fuel and gas from the cutting torch.
1 more element
A cutting torch capable of restricting flashback, comprising:
- a head including an interior surface extending around and defining a head cavity, an oxygen port that is open to the head cavity and is for receiving oxygen from an oxygen supply and supplying oxygen to the head cavity, and a fuel port that is open to the head cavity and is for receiving fuel from a fuel supply and supplying fuel to the head cavity;
- an adapter defining at least one fuel passageway, and including a porous structure that is carried by a body, wherein the porous structure is a distinct component from the body, has a multiplicity of convolute passageways extending therethrough, and is positioned in the fuel passageway, and wherein the body has an internal surface that extends around an axis to define an axially extending bore that is open at opposite ends of the body;
- means for mounting the body to the head and unmounting the body from the head, so that:
- the porous structure remains with the body while the body is being mounted to and unmounted from the head, and
- while the body is mounted to the head the fuel passageway is in communication with the fuel port for receiving fuel from the fuel port, and the porous structure, which is positioned in the fuel passageway, is operative for restricting flashback from entering the fuel port of the head;
- and
- a cutting tip mounted to the head via the adapter and extending through the bore of the body, for discharging the fuel and gas from the cutting torch.
4 more elements
An adapter for being mounted to a head of a cutting torch for cooperating with a cutting tip and restricting flashback, the adapter comprising:
- a body having threads for mounting the body to the head or for mounting the cutting tip to the body, and an axis about which the threads helically spiral, wherein the body includes an internal surface that extends around the axis to define an axially extending bore that is open at opposite ends of the body and that is for having the cutting tip extend therethrough;
- and
- a flashback-restricting porous structure fitted to the body for being mounted to the head with the body, and for remaining with the body when the body is unmounted from the head, wherein the porous structure is a distinct component from the body and has a multiplicity of convolute passageways extending therethrough, and the porous structure is annular and thereby defines a bore extending therethrough that is substantially larger than any of the convolute passageways, and wherein the bore is for having the cutting tip extend therethrough.
An adapter for being mounted to a head of a cutting torch for cooperating with a cutting tip and restricting flashback, the adapter comprising:
- a body having an internal surface that extends around an axis of the body to define an axially extending bore that is open at opposite ends of the body and that is for having the cutting tip extend therethrough, wherein the internal surface of the adapter includes an annular seat for engaging the cutting tip, and the seat extends around the axis and obliquely with respect to the axis;
- and
- a flashback-restricting porous structure fitted to the body for being mounted to the head with the body and for remaining with the body when the body is unmounted from the head, wherein the porous structure is a distinct component from the body and has a multiplicity of convolute passageways extending therethrough, and the porous structure is annular and thereby defines an bore extending therethrough that is substantially larger than any of the convolute passageways, and wherein the bore is for having the cutting tip extend therethrough.
Dependencies are inferred from the claim text.