US 6,451,245 B2Granted

Oxy-fuel torch with a single control for the valves

AssigneesLa Soudure Autogene Francaise, L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude

InventorsPhilippe Pisot, Gilles Cannet, Gervais Lemesle

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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.

Claims31

Dependent claims

A torch comprising:

a body comprising a number of gas pipes for conveying at least two streams of gas between a number of inlets and a number of outlets;
at least two valves mounted in said body and capable of adopting a rest position in which a stream of gas is interrupted in at least one of said gas pipes and an active position in which the passage of the stream of gas is allowed through at least one of said gas pipes;
a single control for at least said two valves and mounted so that it can move on said body and able to be moved in a path so that it cooperates with at least said valves, said control being capable of adopting a first stable position in which said two valves are at rest and at least one second stable position in which at least one of said valves is in an active position;
controllable means of locking said control so as to secure, at rest, said control to said body, at least in said first position, and which can be actuated by hand to free said control from said body;
and
at least one controllable delivery adjusting means mounted on said body for adjusting the delivery of at least one of said streams of gas, said adjusting means comprising a mobile control element,
wherein said at least two valves comprise:
a first valve for controlling a fuel gas for a pilot;
a second valve for controlling the fuel gas for a heating flame;
a third valve for controlling a system for igniting a pilot flame;
and
a fourth valve for controlling an oxidizing gas for the heating flame.

9 more elements

A torch comprising:

a body comprising a number of gas pipes for conveying at least two streams of gas between a number of inlets and a number of outlets;
at least two valves mounted in said body and capable of adopting a rest position in which a stream of gas is interrupted in at least one of said gas pipes and an active position in which the passage of the stream of gas is allowed through at least one of said gas pipes;
a single control for at least said two valves and mounted so that it can move on said body and able to be moved in a path so that it cooperates with at least said valves, said control being capable of adopting a first stable position in which said two valves are at rest and at least one second stable position in which at least one of said valves is in an active position;
controllable means of locking said control so as to secure, at rest, said control to said body, at least in said first position, and which can be actuated by hand to free said control from said body;
and
at least one controllable delivery adjusting means mounted on said body for adjusting the delivery of at least one of said streams of gas, said adjusting means comprising a mobile control element, and
wherein said locking means comprises a push-button mounted so that can move with respect to said control and capable of adopting a rest position in which said control is secured to the body of the torch and an active position in which said control is free with respect to said body.

4 more elements

Dependencies are inferred from the claim text.