Gas burning apparatus

Claim 2

A gas burning apparatus, comprising housing means providing a combustion zone burning combustible gas, a burner unit operatively connected to said housing means and including a unit housing providing a substantially impervious channel having a first cross-sectional area located adjacent an inlet opening and a second cross-sectional area less than said first area located adjacent an outlet opening containing a perforated screen having a convex surface extending across said outlet opening and facing said combustion zone with at least one side edge of said screen movably retained by said housing, and means supplying combustible gas and air at a predetermined pressure to said first area of said channel provided by said burner unit with said unit channel increasing the velocity of mixed combustible gas and air to provide a gas velocity at said combustion zone greater than the flame propagation and maintaining the flame within said combustion zone in spaced relationship to said convex surface.

Claim 3

The burning apparatus of claim 1, and including connector means removably connecting a plurality of said burner units to said housing means for defining said combustion zone and permitting the independent removal of a selected one of said plurality of units from said housing means.

Claim 4

The gas burning apparatus of claim 1, and including means intermittently supplying gas to said combustion zone through said perforated screen for intermittent burning within said combustion zone with the flame spaced from said convex surface.

Claim 5

The burning apparatus of claim 3, wherein said supplying means includes mixing means combining and supplying combustible gas and air at said predetermined pressure to said first area of said channel.

Claim 6

A gas burning apparatus, comprising housing means providing a combustion zone burning combustible gas and a supply channel providing a gas, a burner unit connected to said housing means and including a first front panel, a connector member connected to said first front panel and including a portion spaced from said first front panel and providing a recess therebetween, a second front panel including a perforated screen movably retained within said recess and providing a convex surface facing said combustion zone, a back panel connected to said first and second front panels to form a unit channel, and inlet means providing an opening communicating with said supply channel and said unit channel with gas flowing from said supply channel through said unit channel and said perforated screen to said combustion zone.

Claim 7

A gas burning apparatus, comprising housing means providing a combustion zone burning combustible gas and a supply channel providing a gas, a burner unit connected to said housing means and including a first front panel, a connector member connected to said first front panel and including a portion spaced from said first front panel and providing a recess therebetween, a second front panel including a perforated screen movably retained within said recess and providing a convex surface facing said combustion zone, a back panel connected to said first and second front panels to form a unit channel, and inlet means providing an opening communicating with said supply channel and said unit channel with gas flowing from said supply channel through said unit channel and said perforated screen to said combustion zone.

Claim 8

The burning apparatus of claim 5, wherein said back panel provides a first portion spaced from said first front panel by a first predetermined distance and a second portion spaced from said second front panel by a second predetermined distance less than said first distance with said unit channel increasing the velocity of said gas supplied therethrough.

Claim 9

The burning apparatus of claim 5, wherein said screen includes a first edge portion movably retained within said recess and a second edge portion fixedly connected with a gas impervious seal to said back panel.

Claim 10

The burning apparatus of claim 7, wherein said gas impervious seal includes a U-shaped member engaging said second edge portion and connected to said back panel by a weld.

Claim 11

A gas burning apparatus, comprising housing means providing a combustion zone burning combustible gas and a supply channel providing a gas, a burner unit connected to said housing means and including a first front panel, a connector member connected to said first front panel and including a first portion spaced from said first front panel and providing a recess therebetween and a second portion extending into said supply channel and providing a sealing connection with said housing means, a second front panel including a perforated screen movably retained within said recess, a back panel connected to said first and second front panels to form a unit channel, and inlet means providing an opening communicating with said supply channel and said unit channel with gas flowing from said supply channel through said unit channel and said perforated screen to said combustion zone.

Claim 12

A gas burning apparatus, comprising housing means providing a combustion zone burning combustible gas and a supply channel providing a gas, a burner unit connected to said housing means and including a first front panel, a connector member connected to said first front panel and including a first portion spaced from said first front panel and providing a recess therebetween and a second portion extending into said supply channel and providing a sealing connection with said housing means, a second front panel including a perforated screen movably retained within said recess, a back panel connected to said first and second front panels to form a unit channel, and inlet means providing an opening communicating with said supply channel and said unit channel with gas flowing from said supply channel through said unit channel and said perforated screen to said combustion zone.

Claim 13

The burning apparatus of claim 9, wherein said second portion of said connector member includes an outwardly extending lip passing through said inlet opening and into said supply channel.

Claim 14

A gas burning apparatus, comprising a liquid conducting system including a heat exchanger employing a liquid conduit having an inlet receiving cold liquid and an outlet supplying hot liquid, a mounting housing connected to said heat exchanger and providing a combustion chamber located adjacent to said heat exchanger and burning combustible gas and heating said heat exchanger and a mixing chamber located adjacent to said combustion chamber, a fan supplying predetermined amounts of combustible gas and air to said mixing chamber, and a plurality of spaced burner units removably connected to said mounting housing and conducting air and gas from said mixing chamber to said combustion chamber, each of said burner units including a burner housing providing a conducting channel having an inlet opening communicating with a corresponding opening into said mixing chamber and an outlet including a perforated screen having a convex surface facing said combustion chamber, said conducting channel having a first cross-sectional area located adjacent said inlet opening and a second cross-sectional area less than said first area located adjacent said screen and increasing the velocity of said air and gas being conducted through said screen from said fan through said mixing chamber and said conducting channel.

Claim 15

A gas burning apparatus, comprising a liquid conducting system including a heat exchanger employing a liquid conduit having an inlet receiving cold liquid and an outlet supplying hot liquid, a mounting housing connected to said heat exchanger and providing a combustion chamber located adjacent to said heat exchanger and burning combustible gas and heating said heat exchanger and a mixing chamber located adjacent to said combustion chamber, a fan supplying predetermined amounts of combustible gas and air to said mixing chamber, and a plurality of spaced burner units removably connected to said mounting housing and conducting air and gas from said mixing chamber to said combustion chamber, each of said burner units including a burner housing providing a conducting channel having an inlet opening communicating with a corresponding opening into said mixing chamber and an outlet including a perforated screen having a convex surface facing said combustion chamber, said conducting channel having a first cross-sectional area located adjacent said inlet opening and a second cross-sectional area less than said first area located adjacent said screen and increasing the velocity of said air and gas being conducted through said screen from said fan through said mixing chamber and said conducting channel.

Claim 16

The burning apparatus of claim 11, wherein said burner housing includes a recess movably retaining a first side edge of said perforated screen and permitting thermal expansion and contraction of said screen.

Claim 17

The burning apparatus of claim 12, wherein said screen includes second, third and fourth side edges welded to said burner housing.

Claim 18

The burning apparatus of claim 11, wherein said burner housing includes an outwardly extending lip adjacent said inlet opening and providing a seal with a side edge of said mixing chamber opening.