Atmospheric burner for heating furnaces

Claim 2

An inshot atmospheric gas burner assembly, comprising: an orifice holder; an open sided burner frame positioned on said orifice holder; a venturi assembly having an inlet and an outlet supported by said burner frame in front of said orifice holder, the centerline of said venturi assembly being coincident with the centerline of said orifice holder; a primary air shutter assembly adjustably disposed on said orifice holder for movement towards and away from said venturi assembly inlet to thereby define an adjustable primary air passage; an annular collar positioned around and attached to said burner frame and adapted to attach the burner frame to a furnace; a secondary air shutter assembly adjustably supported on said burner frame between said venturi assembly inlet and said annular collar and including an annular ring concentrically positioned around said venturi assembly adjacent said annular collar to thereby define an adjustable secondary air passage with said annular collar; and a target assembly supported by said burner frame in line with and spaced from the outlet of said venturi assembly and adapted to be impinged upon by the flame from the burner assembly.

Claim 3

An inshot atmospheric burner assembly as defined by claim 1, wherein said target assembly comprises: a target arm rigidly secured at one end to said burner frame and having a portion angled with respect to the centerline of said venturi assembly at the other end; and a circular generally planar flame spreader attached to said angled portion of said target arm and positioned spaced from and at an angle to the outlet of said venturi assembly.

Claim 4

An inshot atmospheric gas burner assembly, comprising: an orifice holder; an open sided burner frame positioned on said orifice holder; a venturi assembly having an inlet and an outlet supported by said burner frame in front of said orifice holder, the centerline of said venturi assembly being coincident with the centerline of said orifice holder; a primary air shutter assembly adjustably disposed on said orifice holder for movement towards and away from said venturi assembly inlet to thereby define an adjustable primary air passage; an annular collar positioned around and attached to said burner frame and adapted to attach the burner frame to a furnace; a secondary air shutter assembly adjustably supported on said burner frame between said venturi assembly inlet and said annular collar and including an annular ring concentrically positioned around said venturi assembly adjacent said annular collar to thereby define an adjustable secondary air passage with said annular collar; a target arm rigidly secured at one end to said burner frame and having a portion angled with respect to the centerline of said venturi assembly at the other end; a circular generally planar flame spreader attached to said angled portion of said target arm and positioned spaced from and at an angle to the outlet of said venturi assembly; and said circular flame spreader having a plurality of perforations formed therein.

Claim 5

An inshot atmospheric gas burner assembly, comprising: an orifice holder; an open sided burner frame positioned on said orifice holder; a venturi assembly having an inlet and an outlet supported by said burner frame in front of said orifice holder, the centerline of said venturi assembly being coincident with the centerline of said orifice holder; a primary air shutter assembly adjustably disposed on said orifice holder for movement towards and away from said venturi assembly inlet to thereby define an adjustable primary air passage; an annular collar positioned around and attached to said burner frame and adapted to attach the burner frame to a furnace; a secondary air shutter assembly adjustably supported on said burner frame between said venturi assembly inlet and said annular collar and including an annular ring concentrically positioned around said venturi assembly adjacent said annular collar to thereby define an adjustable secondary air passage with said annular collar; a target arm rigidly secured at one end to said burner frame and having a portion angled with respect to the centerline of said venturi assembly at the other end; a circular generally planar flame spreader attached to said angled portion of said target arm and positioned spaced from and at an angle to the outlet of said venturi assembly; and said circular flame spreader having a plurality of perforations formed therein.

Claim 6

An inshot atmospheric burner as defined by claim 2, wherein said circular flame spreader further includes an angled portion formed at a position diametrically opposed from the attachment point of said flame spreader to said target arm.

Claim 7

An inshot atmospheric burner as defined by claim 3, wherein said circular flame spreader includes an angled portion at a position diametrically opposed from the attachment point of said flame spreader to said target arm.

Claim 8

An inshot atmospheric burner assembly, comprising: an orifice holder; a burner frame positioned on said orifice holder; a venturi assembly having an inlet and an outlet supported by said burner frame in front of said orifice holder, the centerline of said venturi assembly being coincident with the centerline of said orifice holder; a primary air shutter assembly adjustably disposed on said orifice holder for movement towards and away from said venturi assembly inlet to thereby define an adjustable primary air passage; an annular collar positioned around and attached to said burner frame and adapted to attach the burner frame to a furnace; a secondary air shutter assembly adjustably supported on said burner frame between said venturi assembly inlet and said annular collar and including an annular ring concentrically positioned around said venturi assembly adjacent said annular collar to thereby define an adjustable secondary air passage; a target assembly supported by said burner frame in line with and spaced from the outlet of said venturi assembly and adapted to be impinged upon by the flame from the burner assembly and, wherein said burner frame is generally U-shaped and includes a base portion and leg portions, said base portion having an aperture formed therein, said frame adjustably disposed on said orifice holder at said base aperture thereby permitting said burner frame to be adjustably positioned on said orifice holder.

Claim 9

An inshot atmospheric burner assembly, comprising: an orifice holder; a burner frame positioned on said orifice holder; a venturi assembly having an inlet and an outlet supported by said burner frame in front of said orifice holder, the centerline of said venturi assembly being coincident with the centerline of said orifice holder; a primary air shutter assembly adjustably disposed on said orifice holder for movement towards and away from said venturi assembly inlet to thereby define an adjustable primary air passage; an annular collar positioned around and attached to said burner frame and adapted to attach the burner frame to a furnace; a secondary air shutter assembly adjustably supported on said burner frame between said venturi assembly inlet and said annular collar and including an annular ring concentrically positioned around said venturi assembly adjacent said annular collar to thereby define an adjustable secondary air passage; a target assembly supported by said burner frame in line with and spaced from the outlet of said venturi assembly and adapted to be impinged upon by the flame from the burner assembly and, wherein said burner frame is generally U-shaped and includes a base portion and leg portions, said base portion having an aperture formed therein, said frame adjustably disposed on said orifice holder at said base aperture thereby permitting said burner frame to be adjustably positioned on said orifice holder.

Claim 10

An inshot, atmospheric burner assembly as defined by claim 6, wherein said primary air shutter assembly includes a hub adjustably disposed on said orifice holder; and an annular ring attached to said hub.

Claim 11

An inshot, atmospheric burner assembly as defined by claim 7, wherein said secondary air shutter assembly further includes a frusto-conical portion attached to said annular ring.

Claim 12

An inshot, atmospheric burner assembly as defined by claim 8, wherein said target assembly includes a target arm, one end of which is secured to one of said leg portions, and the other end of which is angled relative to said frame; and a circular flame spreader attached to said angled portion of said target arm.

Claim 13

An inshot, atmospheric burner assembly as defined by claim 9, wherein said circular flame spreader includes an angled portion at a position diametrically opposed from the attachment point of said flame spreader to said target arm.

Claim 14

An inshot, atmospheric burner assembly as defined by claim 10 further including a ribbon element disposed within the outlet of said venturi assembly.