Discharge structure for closed gas appliances
AssigneeUbbink Nederland B.V.
InventorFloris van Dijk
Life of this patent
Estimating the term…
Abstract
Modular discharge structure for closed gas appliances having an inner end and an outer end, comprising: an outer tubular casing; an inner gas exhaust pipe, being placed inside the casing to define an annular supply line for combustion air therewith; a combustion air supply hood, forming a connection between the outside air and the annular supply line, and a combustion gas exhaust hood, forming a connection between the outside air and the gas exhaust pipe, and further comprising retaining means for axially keeping together, in series and in a mechanical and releasable manner, the casing, the combustion gas exhaust hood and the combustion air supply hood on the gas exhaust pipe.
Claims28
A discharge structure for closed gas appliances, the discharge structure having an inner end and an outer end, comprising:
- an outer tubular casing having an outer end and an inner end;
- an inner pipe for the exhaust of combustion gases having an outer end and an inner end, the inner pipe being inside the casing to define an annular supply line for combustion air therewith;
- a combustion air supply means forming a connection between the ambient air and the annular supply line near the outer end of the outer tubular casing;
- a combustion gas exhaust means forming a connection between the ambient air and the inner pipe near the outer end of the inner pipe but further from the inner end of the inner pipe than the combustion air supply means;
- and
- retaining means for axially keeping together in a mechanical manner the casing, the inner pipe, the combustion gas exhaust means and the combustion air supply means, the retaining means comprising a first abutment means on the outer end of the inner pipe for acting in a direction toward the inner end of the inner pipe.
In a combination of a discharge structure for a closed gas appliance having a gas exhaust pipe and a manifold connected with the discharge structure and the gas exhaust pipe, the improvement of the manifold wherein the manifold comprises upper and lower parts having joint faces for arrangement substantially transverse to the gas exhaust pipe and connection means on the upper and lower parts for snap connection of the upper and lower parts, the joint faces cooperating with each other when the upper and lower parts are snap connected as a labyrinth-shaped closing.
In a combination of a discharge structure for a closed gas appliance and a manifold, the discharge structure having an outer wall for receipt in one end of the manifold, the improvement wherein the one end comprises concentric edges defining an annular slot open at the one end, and further comprising a sealing ring for going in the annular slot, the sealing ring having a lip that extends radially inwardly when the sealing ring is in the annular slot for sealingly engaging the outer wall, and an essentially roundgoing body for fitting in the annular slot when the sealing ring is in the annular slot so as to retain the sealing ring therein.
Dependencies are inferred from the claim text.