Back to results
US 7,575,710 B2Granted
High flow gas saver
OwnerClaude Bissonnetteinventor
Life of this patent
Estimating the term…
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.
Claims18
A gas flow control system for a gas fuelled torch, comprising:
- a first fluid passage having a first inlet adapted to be connected to an external fuel gas source and a first outlet adapted to be connected to the gas fuelled torch;
- a second fluid passage having a second inlet adapted to be connected to an external oxygen source and a second outlet adapted to be connected to the gas fuelled torch;
- a first on-off valve in the first fluid passage controllable only between a fully open position and a closed position;
- a second on-off valve in the second fluid passage controllable only between a fully open position and a closed position;
- a first bypass passage in fluid communication with the first fluid passage, bypassing the first on-off valve;
- a third on-off valve in the first bypass passage controllable only between a fully open position and a closed position;
- a second bypass passage in fluid communication with the second fluid passage, bypassing the second on-off valve;
- a fourth on-off valve in the second bypass passage controllable only between a fully open position and a closed position;
- and
- a control apparatus having physical links to the respective on-off valves for selectively and simultaneously actuating the individual first, second, third and fourth on-off valves in different combinations, thereby forming a first operational mode wherein all passages are closed, a second operational mode wherein the first and second fluid passages are open, and a third operational mode wherein the first and second fluid passages are closed and the first and second bypass passages are open.
7 more elements
A gas flow control assembly, comprising:
- a body defining first and second fluid passages extending through the body for receiving fuel gas and oxygen from separate external sources and controllably directing same to a gas fuelled torch, the first and second fluid passages having respective first and second bypass passages;
- first and second on-off valves in the respective first and second fluid passages controllable only between a fully open position and a closed position;
- third and fourth on-off valves in the respective first and second bypass passages controllable only between a fully open position and a closed position;
- a control apparatus having physical links to the respective on-off valves for selectively and simultaneously actuating the individual first, second, third and fourth on-off valves in different combinations, thereby forming a first operational mode wherein all passages are closed, a second operational mode wherein the first and second fluid passages are open, and a third operational mode wherein the first and second fluid passages are closed and the first and second bypass passages are open.
1 more element
A gas flow control assembly, comprising:
- a body defined between opposite first and second surfaces;
- first and second inlet ports, and first and second outlet ports individually defined in one or more side surfaces extending between the opposite first and second surfaces, for receiving and delivering first and second gases, respectively;
- first, second, third and fourth cavities defined in the first surf ace and extending inwardly into the body;
- the respective first and third cavities being in fluid communication with the first inlet and outlet ports, the respective second and fourth cavities being in fluid communication with the second inlet and outlet ports;
- substantially identical first, second, third and fourth valve members received in the respective cavities, each being slidable between a first position in which a related cavity is closed, preventing fluid from flowing therethrough from a related inlet port to a related outlet port, and a second position in which the related cavity is open to allow fluid to flow therethrough from the related inlet port to the related outlet port;
- and
- a cam assembly for selectively and simultaneously actuating the individual first, second, third and fourth valve members in different combinations, for simultaneously controlling first and second gas flows through the assembly.
4 more elements
Dependencies are inferred from the claim text.