초록 ▼

An afterburner positionable adjacent the discharge end of a combustion chamber of a fuel-burning heater utilizes a ring portion and a nose cone portion which are constructed as a unit out of a single piece of material. The ring portion accommodates the attachment of the afterburner adjacent the disc

An afterburner positionable adjacent the discharge end of a combustion chamber of a fuel-burning heater utilizes a ring portion and a nose cone portion which are constructed as a unit out of a single piece of material. The ring portion accommodates the attachment of the afterburner adjacent the discharge end of the combustion chamber, and the nose cone portion has a skirt including peripheral edge portions which are spaced from and overlap the inner edge portions of the ring portion so that the direction of movement of the flow of products of combustion through the combustion chamber is altered before the combustion products exit the chamber. The afterburner is formed from a single piece of sheet steel in steps involving a first press operation, a lancing operation, and then a second press operation.

대표청구항 ▼

An afterburner for a fuel-burning heater having a combustion chamber within which fuel is burned and wherein the combustion chamber includes a discharge through which the products of combustion exit the combustion chamber, said afterburner comprising: a ring portion generally perpendicular to the mo

An afterburner for a fuel-burning heater having a combustion chamber within which fuel is burned and wherein the combustion chamber includes a discharge through which the products of combustion exit the combustion chamber, said afterburner comprising: a ring portion generally perpendicular to the movement of combustion products and securable to the remainder of the heater for maintaining the afterburner adjacent the discharge of the combustion chamber and having a central opening; a nose cone portion attached to first inner edge sections of the ring portion so as to be positioned substantially in registry with the central opening thereof and including peripheral edge sections; the ring portion having second inner edge sections adjacent the central opening which are spaced longitudinally from the peripheral edge portions of the nose cone portion so that the spacings provided between the second inner edge sections and the peripheral edge portions of the nose cone portion provide passage ways through which products of combustion exit the combustion chamber; and the ring portion and the nose cone portion are constructed as a unit out of a single piece of material. A method of making an afterburner for the combustion chamber of a fuel-burning heater wherein the afterburner is to include a ring portion securable to the remainder of the heater and a nose cone portion and wherein the ring portion is to include a central opening and inner edge sections adjacent the central opening and the nose cone portion is to include peripheral edge portions which are spaced from the inner edge sections of the ring portion, the method including the steps of: providing a blank of sheet metal; forming the blank in a first press operation to shape the ring portion and the nose of the nose cone portion; lancing the blank to sever the inner edge sections of the ring portion from the remainder of the blank along preselected paths so that the peripheral edge portions of the nose cone portion are disposed on the side of each preselected path opposite the corresponding inner edge section; forming the blank in a second press operation so that the peripheral edge portions of the nose cone portion are moved in a direction having a component oriented substantially normal to the radial plane of the ring portion to space the peripheral edge portions of the nose cone portion from the inner edge sections.