초록 ▼

A coaxial pipe assembly for a direct vent fireplace coaxial flue-system. The coaxial pipe assembly has an inner flue pipe residing within an outer flue pipe where the two pipes are retained to one another. Each flue pipe has a male connector and a female connector with the male connector of the oute

A coaxial pipe assembly for a direct vent fireplace coaxial flue-system. The coaxial pipe assembly has an inner flue pipe residing within an outer flue pipe where the two pipes are retained to one another. Each flue pipe has a male connector and a female connector with the male connector of the outer flue pipe being aligned with the female end of the inner flue pipe. Lances are formed into the female connector of the outer flue pipe and a locking ridge is formed into the male connector of the outer flue pipe. Each of the two flue pipes of a first coaxial pipe assembly is designed to engage their counterpart in an adjacent coaxial pipe assembly. This engagement seals the adjacent inner flue pipes and is fixed upon the locking ridge passing the lances of a first coaxial pipe assembly to snap into place.

대표청구항 ▼

[ What is claimed is:] [1.] A coaxial pipe assembly for a direct vent fireplace coaxial flue-system, the assembly comprising:a first hollow tube defining an outer diameter and defining an axis concentric to the hollow tube, the hollow tube having a first section and a second section, the first secti

[ What is claimed is:] [1.] A coaxial pipe assembly for a direct vent fireplace coaxial flue-system, the assembly comprising:a first hollow tube defining an outer diameter and defining an axis concentric to the hollow tube, the hollow tube having a first section and a second section, the first section having a male connector defining an outer diameter and the second section having a female connector defining an inner diameter that is greater than the outer diameter of the male connector;a second hollow tube disposed about the first hollow tube and defining an outer diameter that is greater than the outer diameter of the first hollow tube and defining an axis concentric to the first hollow tube, the second hollow tube having a first section and a second section, the first section having a male connector and the second section having a female connector,the male connector of the second hollow tube having a first termination end and an outer stop bead,the first termination end having a locking ridge, the locking ridge extending radially outwards from the axis of the second hollow tube to define an outer diameter that is greater than the outer diameter of the second hollow tube,the outer stop bead extending radially outward from the axis of the second hollow tube and disposed in proximity to the locking ridge,the female connector of the second hollow tube having a second termination end and a plurality of lances,the plurality of lances disposed at equal distances from the second termination end and extending radially inward towards the axis of the second hollow tube to define an inner diameter such that the inner diameter defined by the plurality of lances is less than the outer diameter of the locking ridge;a means for retaining the second hollow tube about the first hollow tube,wherein the female connector of the second hollow tube further comprises a stiffening bead and a stiffening jog,the stiffening bead extending radially outward from the axis of the second hollow tube and disposed in proximity to the second termination end, such that the stiffening bead resides between the plurality of lances and the second termination end, and further whereinthe stiffening jog extends radially inward from the axis of the second hollow tube and disposed in proximity to the plurality of lances such that the plurality of lances resides between the stiffening jog and the stiffening bead.