Fuel flow adjusting device for use in gas-fueled lighters

A fuel flow adjusting device for use in a gas-fueled lighter comprising:

• a fuel tank having upper and lower walls;
• an outer cylindrical body fixedly secured to said upper and lower walls of said fuel tank and having an axially-hollow interior, said outer cylindrical body having a transverse opening adapted to make a fuel communication between said fuel tank and said axially-hollow interior of said outer cylindrical body;
• a top plate, provided on said outer cylindrical body, having a bore through the center thereof;
• a fuel discharge nozzle moveably mounted on the upper portion of said outer cylindrical body;
• a spring for controlling the movement of said fuel discharge nozzle;
• a resilient member positioned within said outer cylindrical body for covering said bore of said top plate to control the fuel communication between said fuel discharge nozzle and said fuel tank;
• an adjusting wad positioned under said top plate within said axially-hollow interior of said outer cylindrical body to control the fuel supply to said fuel discharge nozzle;
• a first fuel flow adjusting means for coarsely adjusting the flow of fuel through said nozzle rotatably positioned within said axially hollow interior of said outer cylindrical body in threaded engagement therewith and having a lower end extending beyond said outer cylindrical body to define an opening therein, said first fuel flow adjusting means including a shoulder formed in the lower part thereof and being provided with a passage opening adapted to introduce fuel gas into said fuel tank;
• a second fuel flow adjusting means for finely adjusting the flow of fuel through said nozzle rotatably positioned within said first fuel flow adjusting means in threaded engagement therewith, said second fuel flow adjustment means including a pressure head mounted on said first fuel flow adjusting means in rotatably engagement hterewith, said pressure head being arranged to contact with said adjusting wad for applying pressure variation on the latter;
• said second fuel flow adjusting means further including a central axle telescopically positioned within said first fuel flow adjusting means in rotation-transmissive engagement with said pressure head, a lower end of said central axle extending into said opening of said first fuel flow adjusting means, wherein said pressure head has a groove on the lower side thereof and wherein said central axle operatively engages said groove of said pressure head at its upper end;
• a spring arranged in engagement with said pressure head and said central axle so as to apply downward pressure on said central axle;
• a first sealing member interposed between said outer cylindrical body and said first fuel flow adjusting means;
• and
• a second sealing member arranged on said central axle to form a sealing contact with said shoulder under the action of said spring.