Gas control mechanism

A gas control mechanism includes a housing having a chamber for receiving a lighter and having an upper wall and a mouth secured on top. The lighter has a gas nozzle and a pivot lever having one end coupled to the gas nozzle. A tube has one end extended through the upper wall and coupled to the mouth and has a gasket secured to the bottom for engaging with the gas nozzle. The gasket includes an orifice for receiving gas from the gas nozzle. A spring may bias the gasket to engage with the gas nozzle, and a trigger may actuate the lever to actuate the gas nozzle. The gas nozzle is forced to engage with the gasket and to make an air tight seal between the tube and the gas nozzle when the gas nozzle is actuated by the trigger via the lever.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a control mechanism, and more particularly 
to a gas control mechanism. 
2. Description of the Prior Art 
Typical gas welders comprise a complicated control mechanism for 
controlling the outward flow of the gas which may not be easily 
manufactured and assembled and which may not be easily operated by the 
user when in use. In addition, the typical lighter that is engaged in a 
housing may not be easily actuated and operated. 
The present invention has arisen to mitigate and/or obviate the 
afore-described disadvantages of the conventional gas welders. 
SUMMARY OF THE INVENTION 
The primary objective of the present invention is to provide a gas control 
mechanism which includes a greatly simplified configuration for allowing 
the control mechanism to be easily and quickly manufactured and assembled 
and to be effectively operated. 
In accordance with one aspect of the invention, there is provided a gas 
control mechanism comprising a housing including a chamber formed therein 
and including an upper wall, and including a mouth provided on top 
thereof, a lighter disposed in the chamber of the housing and including a 
gas nozzle and including lever having a middle portion pivotally secured 
on top of the lighter at a pivot, the lever including a first end and a 
second end coupled to the gas nozzle for actuating the gas nozzle, a tube 
including a first end extended through the upper wall and coupled to the 
mouth, the tube including a bottom portion having a gasket secured therein 
for engaging with the gas nozzle, the gasket including an orifice formed 
therein for receiving gas from the gas nozzle, means for biasing the 
gasket to engage with the gas nozzle, and a trigger means for actuating 
the lever to actuate the gas nozzle. The gas nozzle is forced to engage 
with the gasket by the lever and to make an air tight seal between the 
tube and the gas nozzle when the gas nozzle is actuated by the trigger 
means via the lever. 
The gasket includes an upper end of greater size force-fitted in the bottom 
portion of the tube and includes a lower end of smaller size extended 
outward of the tube to engage with the gas nozzle. 
A limiting means is further provided for limiting a relative movement 
between the tube and the wall. The limiting means includes a stop secured 
to the first end of the tube and forced to engage with the upper wall by 
the biasing means. 
Further objectives and advantages of the present invention will become 
apparent from a careful reading of the detailed description provided 
hereinbelow, with appropriate reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
Referring to the drawings, a gas control mechanism in accordance with the 
present invention comprises a housing 31 including an upper wall 36 and a 
chamber 310 formed therein for receiving and securing a typical lighter 
34. The typical lighter 34 includes a lever 341 laterally secured on top 
and having a middle portion engaged on top of a pivot 343 for allowing the 
lever 341 to be moved about the pivot 343. The lever 341 includes one end 
engaged with a typical gas nozzle 35 of the typical lighter 34 and 
includes the other end to be actuated by a trigger device 37 which 
includes a trigger 372 having a typical spring-biased actuator member 371 
to engage with and to depress the other end of the lever 341 and to 
actuate the gas nozzle 35. The housing 31 includes a mouth 33 provided on 
top thereof and includes a hose 32 coupled to the mouth 33. 
A control mechanism 2 includes a tube 21 having an upper end extended 
upward through the upper wall 36 and coupled to the hose 32 for supplying 
the gas into the mouth 33. A ring-shaped stop 361 is secured on the upper 
end of the tube 21 by a fastener, such as a clamping ring 362. The tube 21 
includes an annular flange 211 extended radially outward from the middle 
portion. A spring 22 is engaged between the wall 36 and the annular flange 
211 for biasing the tube 21 downward toward the gas nozzle 35. The stop 
361 may limit the movement of the tube 21 relative to the wall 36 and may 
prevent the tube 21 from being disengaged from the wall 36. The tube 21 
includes a gasket 23 secured in the bottom end and having an orifice 231 
for receiving the gas nozzle 35 and for receiving the gas from the gas 
nozzle 35 of the typical lighter 34. The gasket 23 is preferably made of 
rubber materials having a suitable resilience. The spring 22 may bias the 
gasket 23 to engage with the gas nozzle 35. The gasket 23 includes an 
upper end 232 of greater size for force-fitted in the bottom end of the 
tube 21 and includes a lower end 233 of smaller size and extended downward 
through the bottom end of the tube 21 for engaging with the gas nozzle 35. 
In operation, as shown in FIG. 1, when the trigger 372 of the trigger 
device 37 is depressed by the user, the actuator member 371 may be 
actuated to depress the other end of the lever 341 and to elevate the gas 
nozzle 35 to engage with the gasket 23 and to make an excellent air tight 
between the tube 21 and the gas nozzle 35, such that the gas of the 
lighter 34 may flow out through the gas nozzle 35 and may safely and 
effectively flow into the tube 21 via the orifice 231 of the gasket 23. 
When the lever 341 is released, the spring 22 may recover the tube 21 and 
the gas nozzle 35. 
Accordingly, the gas welder in accordance with the present invention 
includes a tube 21 having a gasket 23 that may be effectively and safely 
engaged with the gas nozzle 35 for allowing the gas to flow into the tube 
21 and for making an excellent air tight between the tube 21 and the gas 
nozzle 35. 
Although this invention has been described with a certain degree of 
particularity, it is to be understood that the present disclosure has been 
made by way of example only and that numerous changes in the detailed 
construction and the combination and arrangement of parts may be resorted 
to without departing from the spirit and scope of the invention as 
hereinafter claimed.