Oil burner of type of pumping up fuel oil

An oil burner of the type of pumping up a fuel oil comprising:

• a combustion means;
• an air supply means for supplying an air to said combustion means;
• a first oil level setting means of an airtight type for keeping the surface of a fuel oil introduced therein constant at a predetermined level, said first oil level setting means including a fuel oil reservoir connected through a fuel oil supply pipe to said combustion means and communicated at the upper space portion thereof through a ramification pipe to said air supply means so that the pressure of an air flowing through said air supply means may be applied onto the surface of a fuel oil in said reservoir;
• a second oil level setting means installed at a position below said first oil level setting means which keeps the surface of a fuel oil therein substantially constant at a predetermined level;
• a pumping-up means for drawing up a fuel oil supplied from said second oil level setting means to said first oil level setting means;
• said first oil level setting means further including an overflow pipe means connected to said reservoir which has an upper portion for overflowing an excess of fuel oil introduced in said reservoir positioned below the end of said fuel oil supply pipe extending into said combustion means and has a lower end immersed in a fuel oil to be pumped up to said first oil level setting means.