Abstract: The invention relates to a method for flame cutting a part made of a metal containing iron, implementing at least one blowtorch having a cutting nozzle, wherein the operation is carried out according to the steps of preheating a localized area of the part by means of a flame obtained by the combustion of a combustible gas and oxygen, then directing the gaseous oxygen towards the preheated localized area into a first pressure and/or first flow for initiating a bore while shifting the blowtorch in the cutting direction. Then, after initiating a bore in the part, the pressure and/or flow of gaseous oxygen is increased in the direction of the bore start area to a second pressure higher than the first pressure and/or a second flow higher than the first flow to obtain the complete bore in the part. The invention also relates to associated equipment.

Abstract: A consumable thermal torch for cutting through materials includes a first elongated generally cylindrical member adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end. A second member has a hollow profiled similarly adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end. The second member is received radially within the first member and is substantially axially coextensive therewith. At least one first gas flow passage is formed radially between the second member and the first member. At least one second gas flow passage is formed within the hollow profile of the second member and extends from the first end of the second member to the second end of the second member.

Abstract: A gas torch assembly and its method of use are described for use in high-temperature applications such as a furnace, power generation station, pottery kiln and flame cutting and welding torches, which requires only inexpensive, low environmental impact, low pressure fuels such as propane gas and air; utilizes the initial internal combustion of the fuel gas to subsequently preheat air/oxygen and/or the fuel gas to well above ambient temperature; and dispenses with the need of arc-oxygen or arc-air cutting of metals.

Abstract: The present invention relates to use of a thermic lance as a firework. Frictional or electrical ignition of a thermic lance is more convenient and safer than conventional methods. In addition, when used as a firework, the lance is safer and provides less pollution than conventional fireworks.

Abstract: A thermal energy machining (“TEM”) machine is designed with interchangeable components for processing different sized parts within a single frame. The frame weldment includes a base, an upper mounting plate and intermediate mounting plates. In one embodiment, a TEM machine for processing short parts includes a ram cylinder directly secured to the base, a chamber spacer directly secured to the upper mounting plate and a thermal chamber directly secured to the chamber spacer. In another embodiment, a TEM machine for processing long parts includes a thermal chamber directly secured to the upper mounting plate, a ram spacer directly secured to the base, and a ram cylinder directly secured to the ram spacer.

Abstract: A portable cart with a noncombustible heat and fire resistant panel of calcium silicate for separating compressed oxygen cylinders from compressed fuel gas cylinders where the calcium silicate panel has a fire resistance rating greater than one half hour and spans the entire height and width between adjacent oxygen and fuel gas cylinders.

Abstract: The present invention provides a fully rotatable swivel attachment tip for a cutting torch over a broad radius range. The tip comprises two selectable fixed angle members that, in combination allow orientation of the cutting tip precisely where the operator desires. In addition to the variability of the first and second angles of the first and second angle members, the length of the attachment between the first and second selectable angles may be variable and selectable by the operator to facilitate orientation of the cutting tip and the cutting flame supported and directed thereon. Thus, the cutting tip is thus rotatable along two axes and in two dimensions and is capable of circumscribing a partial sphere of varying diameter.

Abstract: A gas flow control system for a gas fuelled torch including four gas passages controlled by four on-off valves and a control device. The control device can be used to actuate the valves in different combinations, thereby shutting off both fuel and oxygen flows, or allowing a full rate of fuel and oxygen flows for operational performances, or allowing only a restricted rate of fuel and oxygen flows for a pilot flame of the torch.

Abstract: An improved thermal lance is made of a low carbon steel sheath having an internal bore and a thin cylindrical rod that is roll-formed from low carbon steel sheet. The rod being sized for conforming fit in the bore of the tube and has a length dimension that is longer than the length of the tube. The rod is inserted into the bore of the tube and allowed to move axially within the tube under propulsion of the pressurized oxygen to allow the rod to be burned at a rate independent of the burn rate of the sheath. One or more apertures in the tube restrict the flow of oxygen until the rod is ignited. An O ring located near the fuse protector of the lance housing keeps the lance from moving during routine handling and storage.

Abstract: A downdraft cutting table assembly includes a cutting table having a top surface for supporting a workpiece, and first and second side wall assemblies for supporting the top surface. The cutting table is comprised of table sections. First and second rail assemblies are mounted to the side wall assemblies for mounting a cutting torch assembly, which moves along the rail assemblies for cutting the workpiece. Partitions defining ventilation zones extend beneath the top surface. An exhaust duct having a vent associated with a ventilation zone is included for exhausting fumes produced when cutting the workpiece proximal to the ventilation zone. A pivoting door assembly having a door and an arm assembly is included for covering the vent. The arm assembly is actuated by the cutting torch assembly and pivots the door open, allowing the fumes to be drawn into the exhaust duct.

Abstract: The present invention provides for cutting operations using linear thermite charges; the charges cut one dimensional or two dimensional geometric shapes; the invention is useful for structure entry or demolition.

Abstract: An improved thermal lance is made of a low carbon steel sheath having an internal bore and a thin cylindrical rod that is roll-formed from low carbon steel sheet. The rod being sized for conforming fit in the bore of the sheath and has a length dimension that is longer than the length of the sheath. The rod is inserted into the bore of the sheath and allowed to move axially within the sheath under propulsion of the pressurized oxygen to allow the rod to be burned at a rate independent of the burn rate of the sheath. A thermal lance assembly using the improved lance also includes a magnet located near the bottom of the lance housing to keep the lance from moving during routine handling and storage.

Abstract: A consumable thermal torch for cutting through materials includes a first elongated generally cylindrical member adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end. A second member has a hollow profiled similarly adapted to receive an associated supply of oxygen into a first end and react with the oxygen at a second end. The second member is received radially within the first member and is substantially axially coextensive therewith. At least one first gas flow passage is formed radially between the second member and the first member. At least one second gas flow passage is formed within the hollow profile of the second member and extends from the first end of the second member to the second end of the second member.

Abstract: A cutting table assembly for oxy cutting comprising a cutting table having a slab loading face and mounted for pivotal movement between a loading position in which the loading face is generally horizontal and a cutting position in which the face is oblique, and a pair of torches mounted on the table. The loading face is constituted by a pair of loading subfaces separated by a slot and the torches are mounted in the slot below the loading face. The torches are positioned at opposite ends of the slot prior to the initiation of the cutting action and, upon the initiation of the cutting action, move toward each other and cut into opposite ends of the slab. A pair of gantries are mounted on the table and each carries a deburring device positioned in overlying opposition to a respective torch. Each gantry further includes a plurality of spaced downwardly directed nozzles which are supplied with compressed air to generate an air curtain.

Abstract: A steel cutting system has a cutting torch on a first side of a slab of steel. A pair of oxygen jets is placed on a second side of the slab of steel.

Abstract: The invention relates to a method for thermal cutting, wherein a cutting gas is piped into a cutting nozzle and guided on to a work piece to be processed by means of the cutting nozzle. According to the invention the cutting gas is at least reduced in a periodically repetitive manner wherein the time in which the cutting gas is guided onto the work piece in an undiminished manner is shorter than half of a period. In addition the invention relates to a corresponding device with a valve.

Abstract: A torch operable to pivotally secure a lever on opposite sides of the torch. The torch may comprise a torch butt, a valve assembly, and a lever. The valve assembly may be operable to control a flow of a fluid through the torch butt. The lever may be selectively securable to a first portion of the torch butt and a second portion of the torch butt. The second portion of the torch butt may be disposed opposite the first portion of the torch butt. The valve assembly may be selectively securable within the torch butt to enable the lever to operate the valve assembly with the lever selected to pivot about the first portion of the torch butt and the second portion of the torch butt.

Abstract: An apparatus for enabling fabrication of accurate angular cuts in a pipe includes a first fixture adapted to be clamped on a pipe and adjusted relative to the pipe so as to define a substantially planar surface aligned with a desired cut angle relative to a longitudinal axis of the pipe and a second fixture adapted to mount a cutting torch and enable sliding the mounted cutting torch on the planar surface defined by the first fixture and relative to the pipe such that the torch can fabricate a cut in the pipe at the desired cut angle.

Abstract: An emergency cutting torch system adapted to be stored within a compartment of a rescue vehicle. The emergency cutting torch system may comprise a wheeled cart adapted to maintain a first gas storage tank and a second gas storage tank to the wheeled cart in all orientations of the wheeled cart. The emergency cutting torch system may comprise a rotateable lifting member adapted to be rotate outward to extend from the wheeled cart to facilitate engagement with a hook, or other lifting member, for lifting the emergency cutting torch system. The lifting member may rotate to a stowed position to reduce the outer dimensions of the emergency cutting torch system. The emergency cutting torch system may comprise a quick-release system to enable a hose assembly wound on a cart be removed quickly without having to unwind the hose assembly from the cart.

Abstract: A method for cutting steel includes heating a portion of the steel until it is molten, positioning a cutting torch to have a high angle of incidence relative to the molten steel, and blasting high pressure oxygen at the molten metal. The blast of high pressure oxygen further heats the molten metal and blows the molten metal away from the steel to create a cutting trench. The cutting torch is then moved generally parallel to the cutting method includes a cutting torch that emits a high pressure combustible gas and a high pressure combustion enhancing gas. The torch directs the high pressure gases at the steel so that the gases hit the steel at an acute angle of attack. An automated device propels the torch in the general direction of the desired cut. The resultant cut metal product has at least one edge with a grain pattern that is not perpendicular to the direction of cut.

Abstract: In accordance with the method and the device according to the invention, previous pure pyrotechnic primers for initiating the ignition charges (6a, 6b) of the oxygen lance igniters (13) are replaced by a small quantity of powdered zirconium (7). Zirconium is pyrophoric and therefore ignites, providing it has a sufficiently large surface area, in the presence of a sufficient quantity of pure oxygen, although in ordinary air it is no more flammable than ordinary wood.

Abstract: The present invention provides a method and process for removing adherent molten metal from a surface by applying a non-wetting agent for the metal to the surface or to the adherent molten metal. The non-wetting agent may be a pressurized fluid or applied by a pressurized fluid.

Abstract: A scraper removes debris from under a work table, particularly slag resulting from cutting of metal. A pair of parallel tracks extends along opposite sides of a collection area under the table. A blade carriage is carried on the tracks and driven between forward and rearward positions. A pair of arm assemblies are connected to opposite sides of the blade and pivotally mounted to the carriage for moving the blade between a scraping position and a retracted position. A forward notch on each of the tracks is contacted by the arm assembly after reaching the forward position to cause the arm to move the blade from the scraping position to the retracted position during rearward movement. A rearward notch on each of the tracks is contacted by the arm assembly after reaching the rearward position and commencing forward movement to cause the arm to move the blade from the retracted position to the scraping position. The carriage is moved by continuous cables.

Abstract: Flashback protection is provided 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 check valve and porous structure for restricting flashback.

Abstract: An emergency cutting torch system adapted to be stored within a compartment of a rescue vehicle. The emergency cutting torch system may comprise a wheeled cart adapted to maintain a first gas storage tank and a second gas storage tank to the wheeled cart in all orientations of the wheeled cart. The emergency cutting torch system may comprise a rotateable lifting member adapted to be rotate outward to extend from the wheeled cart to facilitate engagement with a hook, or other lifting member, for lifting the emergency cutting torch system. The lifting member may rotate to a stowed position to reduce the outer dimensions of the emergency cutting torch system. The emergency cutting torch system may comprise a quick-release system to enable a hose assembly wound on a cart be removed quickly without having to unwind the hose assembly from the cart.

Abstract: A gas cutting torch has a body including an oxygen preheat tube having a first longitudinal axis and a fuel gas preheat tube having a second longitudinal axis. A head is connected to the preheat tubes having an oxygen passage communicating with the oxygen preheat tube, a fuel gas passage communicating with the fuel gas preheat tube, and an outlet for the flow of mixed gases from the torch. A mixing chamber in the head communicates with the oxygen passage and fuel gas passage. The torch has an orifice in the oxygen passage through which oxygen is adapted to flow to the mixing chamber at an increased flow velocity with an accompanying pressure drop. The pressure drop assists in the flow of fuel gas into the mixing chamber for mixture with the oxygen. A diffuser in the head defines a diffuser passage having an inlet region for receiving oxygen and fuel gas from the mixing chamber for flow through the diffuser, and an outlet region for the delivery of oxygen and fuel gas to the outlet of the head.

Abstract: An improved nozzle for thermite cutting torches provides an elongated nozzle dimensioned and configured to direct a maximized flow of cutting flame to the desired cutting location on a workpiece. The nozzle includes an exterior wall defining the nozzle face having an arc dimensioned and configured to center the cutting aperture over the desired cut when the cutting torch is clamped to the workpiece. The nozzle also includes a groove for directing the flow of reaction products, thereby minimizing backpressure in the nozzle region, and eliminating the need for a standoff distance.

Abstract: An apparatus for cutting a duplicate form includes:

Abstract: A method for cutting steel in which an operator uses high pressure propane and oxygen. The operator heats the steel locally until it is molten, positions a cutting torch with a high angle of incidence relative to the molten steel, and then blasts high pressure oxygen at the molten metal. Such blast serves two purposes, heating the molten metal so it is less viscous and then blowing the molten metal away from the steel sheet creating a cutting trench. The cutting torch is positioned relative to the cutting trench to provide even heat. The cutting torch is then moved generally parallel to the cutting trench to lengthen the cut.

Abstract: A gas cutting torch has a body including an oxygen preheat tube having a first longitudinal axis and a fuel gas preheat tube having a second longitudinal axis. A head is connected to the preheat tubes having an oxygen passage communicating with the oxygen preheat tube, a fuel gas passage communicating with the fuel gas preheat tube, and an outlet for the flow of mixed gases from the torch. A mixing chamber in the head communicates with the oxygen passage and fuel gas passage. The torch has an orifice in the oxygen passage through which oxygen is adapted to flow to the mixing chamber at an increased flow velocity with an accompanying pressure drop. The pressure drop assists in the flow of fuel gas into the mixing chamber for mixture with the oxygen. A diffuser in the head defines a diffuser passage having an inlet region for receiving oxygen and fuel gas from the mixing chamber for flow through the diffuser, and an outlet region for the delivery of oxygen and fuel gas to the outlet of the head.

Abstract: A torch cutting tool has a clamp that is attached to a workpiece with the clamp having a rotating platform with an attached first latch member. A second latch member is attached to a track with a moveable carriage on which is mounted a positioning arm with a torch holder. After the clamp is attached to the workpiece, the second latch member is quickly latched to the first latch member to effect quick and simple setup. A cam follower, a second rotating platform, a second positioning arm, a covered track, a rotating base plate and metered fuel and oxygen supplies make the tool simple and easy to use.

Abstract: A robotic welding station cleaning assembly (10) for removing particulates from an air-filled chamber surrounding a welding robot (12). A frame (14) is positioned about the robot (12) and includes a top (20) defining an opening (26) therein. A shield (28) is supported by the frame (14) to define the robot chamber. A spark arrestor (48) is supported on the frame (14) for controlling sparks created by welding. A blower housing (30) having an inlet (27) is disposed immediately above and in direct fluid communication with the opening (26) to move air from the chamber to the blower housing (30). The frame (14) includes a separate support stand (32) for supporting the blower housing (30) on the top (20) of the chamber.

Abstract: The invention concerns a procedure for flame-cutting a slab using at least one oxycutting torch at a workstation and a device for implementing this procedure. The slab and the oxycutting torch are moved in relation to each other, with the slab arranged in a cutting position such that its primary plane lies at an angle of −10° to −20° with respect to the vertical plane.

Abstract: A system for the thermal treatment of work pieces with an explosive gas mixture, in particular, a thermal deburring system, has a processing chamber (10), which includes a combustion chamber (12) for receiving the work pieces. A supply channel (18) for the gas mixture opens into the combustion chamber (12). In the combustion chamber (12), a device is provided, which has a plurality of openings through which the flame front passes for thermally treating the work pieces. The device can be one that connects to the supply channel (18), preferably in the form of a tube (26) with a plurality of openings (28), which can be made from an extruded sheet. The work pieces obtain a more uniform processing or deburring effect, since the flame front passes through the many small openings of the device. The small openings (28) serve also as throttles, whereby the entire combustion process runs for a longer time.

Abstract: A torch carriage assembly for use in bevel cutting a pipe has a ring gear which rotates concentrically about the pipe longitudinal axis. A shaft extending perpendicularly from the ring gear carries a torch arm block assembly which positions the cutting torch in relation to the pipe. A bracket is adaptable between a first configuration prohibiting and a second configuration permitting rotation of the shaft about its longitudinal axis for bevel cutting round pipes and out-of-round pipes, respectively. In the second configuration, a guide wheel assembly mounted on the shaft traces the surface of the pipe. A tension assembly continually urges the guide wheel assembly into contact with the surface of the pipe so that the angular position of the torch arm block assembly accurately reflects the out-of-round conditions of the pipe.

Abstract: A method of torch-cutting steel, typically slab steel, produced by continuous casting wherein a cutting torch is fueled with propylene and oxygen and wherein the fuel is mixed and combusted on the surface of the slab thus permitting the cutting of the slab to proceed contemporaneously with the production of slab steel by the continuos casting process.

Abstract: A steel cutting apparatus includes a cutting torch that is moved in an arcuate path for guiding the cutting torch so that a cutting flame of the cutting torch is always aimed at a bottom corner of the steel at the side where the cutting process begins. Molten steel and iron oxide flow through a kerf in the steel toward the bottom corner, and drop away from the billet for collection and disposal. Only a very small amount of slag adheres to the bottom corner of the billet when cutting is complete.

Abstract: An apparatus for scanning the working level of a cutting tool relative to the surface of a workpiece and provided with a scanning arm adapted to move relative to the surface of the work piece and movable in response to an irregularity in the surface for opening a switch thereby to disconnect the cutting tool from a source of power.

Abstract: A cutting torch guide is described in which a block is formed with a torch tip stop flange that defines a torch tip abutment plane and that is shaped to abut with and angularly position a torch tip with respect to a workpiece plane. An angle iron edge receiving and guiding surface is formed in the block and defines a guide plane that intersects the torch tip abutment plane. The guide plane and torch tip abutment plane are oriented to angularly position a cutting torch tip at an acute angle with respect to the workpiece.

Abstract: The unique in the construction is a number of important components and parts: a) the plate holder in molded aluminium; its double function and shaping in order to be able to be used as both a holder for plates and also serve for transfer of the circular movement to the linear, b) the driving wheel which facilitates the transfer of the circular movement to the plate holder, c) the superstructure which comprises a device for a press roll and also the parallel conveying bar and to make it possible for adjustment of the frictional pressure between the driving wheel and the plate holder, d) adjustment, through engine-driven gear racks, of the plasma gun for the making of holes.

Abstract: A torch cutter exhaust system has a torch and an exhaust shroud at least partially encircling a discharge tip of the torch and mounted to the torch for movement therewith. The shroud is a crescent-shaped enclosure having an intake port and an output port. A table is located beneath the torch to support a material while the material is being cut by the torch. A gantry, movably mounted to the table, supports the torch and exhaust shroud. A duct, mounted to the gantry, connects the exhaust shroud with a flexible exhaust hose located alongside the table. The output end of the hose connects to a vacuum source to create low pressure near the discharge tip of the torch. The input end of the exhaust hose moves in unison with the gantry. The exhaust hose is supported by a wheel assembly that moves in response to the motion of the gantry.

Abstract: A cutting apparatus comprises a machine bed support (1) having a quarter circle profile as seen from above and carrying a workpiece supporting platform (5). The workpiece may be a steel plate (6). The rear of the apparatus has an upstanding post (2) forming a vertical pivot to which is rigidly connected upper and lower arms (3) and (4) which may thus swing in a horizontal plane. A frame (7) is supported on the arms (3) and (4) by rollers R for free movement towards and away from the post (2). The lower limb of frame (7) carries the workpiece cutting device (16) and the upper limb of this frame caries a template following sensor device (8). The sensor device (8) is arranged to follow the required profile defined by a drawing or template on table (10) and this is effected by control of two drive motors using photo-electric template following means one motor driving a wheel (12) which frictionally engages the template and the other motor controlling the orientation of the wheel (12).

Abstract: A cutting torch guide is described in which a block is formed with a torch tip stop flange that defines a torch tip abutment plane and that is shaped to abut with and angularly position a torch tip with respect to a workpiece plane. An angle iron edge receiving and guiding surface is formed in the block and defines a guide plane that intersects the torch tip abutment plane. The guide plane and torch tip abutment plane are oriented to angularly position a cutting torch tip at an acute angle with respect to the workpiece.

Abstract: The invention involves a process for the oxygen cutting of slabs—using one or more oxygen cutting torches—and a device for implementing the process. The process includes the steps of hanging the slab (16) using one or more electromagnets (14) separated from the slab (16) by a non-magnetic device or medium (such as air); causing a relative motion between the cutting torches (18) and the slab (16); using a carrying device (15) acting on the slab on the same side of the slab (16) as the electromagnet (14); and activating the cutting torch (18) in order to cut the slab (16) when it is transported past the cutting torch (18).

Abstract: A carriage assembly is shown for moving equipment for testing or other functions along a wall surface. The carriage assembly includes a main frame for supporting the equipment in relationship to other equipment and to the wall surface, and a sub-frame that supports service lines such as wires and hoses, while isolating loads created by moving the service lines with the carriage from the main frame and the mounted equipment and providing an unobstructed field of view of the subject area under examination. Wheels mounted on the carriage assembly for providing the interface with the wall surface include fixed position wheels and adjustable wheels to compensate for irregularities along the wall surface. At least one of the fixed position wheels or the adjustable wheels are magnetic for holding the carriage against a ferrous or magnetic wall surface.

Abstract: The invention is a remotely controlled internal pipe cutting device primarily used for cutting pipes where the outside of the pipe is inaccessible at the line where the cut is to be made. The device includes an axial ram within a rotational cylinder which is enclosed in a housing. The housing is adapted for attachment to an open end of the pipe and for supporting the ram and cylinder in cantilever fashion within the pipe. A radially movable cutter, preferably a plasma arc torch, is attached to the distal end of the ram. A drive mechanism, containing motors and mechanical hardware for operating the ram and cylinder, is attached to the proximal end of the housing. The ram and cylinder provide for moving the cutter axially and circumferentially, and a cable assembly attached to a remote motor provide for the movement of the cutter radially, within the pipe. The control system can be adjusted and operated remotely to control the position and movement of the cutter to obtain the desired cut.

Abstract: Reactive foils and their uses are provided as localized heat sources useful, for example, in ignition, joining and propulsion. An improved reactive foil is preferably a freestanding multilayered foil structure made up of alternating layers selected from materials that will react with one another in an exothermic and self-propagating reaction. Upon reacting, this foil supplies highly localized heat energy that may be applied, for example, to joining layers, or directly to bulk materials that are to be joined. This foil heat-source allows rapid bonding to occur at room temperature in virtually any environment (e.g., air, vacuum, water, etc.). If a joining material is used, the foil reaction will supply enough heat to melt the joining materials, which upon cooling will form a strong bond, joining two or more bulk materials. If no joining material is used, the foil reaction supplies heat directly to at least two bulk materials, melting a portion of each bulk, which upon cooling, form a strong bond.

Abstract: Apparatus and method for cutting a workpiece by the use of a laser beam and an assist gas, in which at least one optical means is used to focus the laser beam at several focal points separate from one another, and in which, as assist gas for the said laser beam, a gas mixture containing hydrogen and at least one inert gas is used. The optical means is transparent or reflecting and is chosen from lenses, mirrors and combinations thereof, preferably a bifocal lens. The workpiece to be cut is made of stainless steel, coated steel, aluminum or an aluminum alloy, non-alloy steel or alloy steel. The inert gas is chosen from nitrogen, argon, helium and mixtures thereof.

Abstract: An installation and a method for oxygen arc cutting of a metal workpiece containing at least a ferrous material, in particular a structural steel workpiece, which consists in: pre-heating locally a priming zone of the metal workpiece to be cut by subjecting the priming zone to a plasma jet; then in producing a localized fusion and/or combustion of the ferrous material contained in the workpiece, using the plasma jet or a combination of the plasma jet and an oxidizing gas flow to obtain a perforation along the whole thickness of the metal workpiece; once the perforation has been obtained, in synchronously displacing, the plasma jet and the oxidizing gas flow along a cutting path to produce a predefined slit through the metal workpiece.

Abstract: The invention relates to an oxy-fuel torch. The torch comprises a body (10) comprising a number of pipes for conveying at least two streams of gas between inlets (14, 15) and outlets; at least two valves (16, 20, 22) mounted in said body capable of adopting a closed rest position and an open active position; a single control (12) for said valves and mounted so that it can move on the body and able to be moved so that it collaborates with said valves, capable of adopting a first stable position in which all the valves are at rest and at least one second stable position in which at least one of the valves is in the active position; controllable means (40) of locking said control (12) so as to secure it, at rest, to said body; and at least one controllable delivery adjusting means (46, 48) mounted on said body for adjusting the delivery of at least one of said streams of gas.