Patent ID: 6910881
Filing Date: 2005-06-28
Classification: F23D,Y02E

Abstract:
1. 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 gas 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, the body defining threads, wherein the adapter is mounted to the head by engaging the threads of the body to threads of the 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.