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US 5,309,891 AGranted
Direct evacuation gas heater or fireplace and safety release valve for said heaters
AssigneeCheminees Securite LTEE
InventorErnest Savoie
Life of this patent
Estimating the term…
Abstract
A direct ventilation gas fireplace having co-linear air intake pipe and gas outlet pipe. The pipes are separated from each other so that the fluid flowing in one pipe does not come in contact with the other pipe. The gas outlet pipe may comprise a safety release valve that allows any excess pressure, in case of explosion, to exit through a lateral spring-actuated door into an enclosure closed around the combustion chamber. This safety release valve allows to build fireplaces having pipes longer than the usual length allowed for respecting specific safety tests in case of gas explosion.
Claims8
A direct evacuation heater comprising:
- (a) a combustion chamber;
- (b) a closed enclosure separating the combustion chamber from its environment;
- (c) an air intake pipe and a gas outlet pipe connected to and leading outside of said enclosure, wherein said intake and outlet pipes have portions outside of said enclosure that are separate from each other so that air in said air intake pipe never comes in contact with said gas outlet pipe and gas in said gas outlet pipe comes in contact with said air intake pipe;
- and
- (d) a safety release valve positioned adjacent said combustion chamber within said enclosure, said valve releasing excess pressure within said outlet pipe to said enclosure in case of gas explosion;
- wherein said safety release valve comprises at least one lateral opening provided in said outlet pipe, a spring-actuated door peripheral to said gas outlet pipe closing said opening, said door being hermetically shut when pressure in said pipe is substantially atmospheric and opening upon a sudden raise in pressure.
3 more elements
Dependencies are inferred from the claim text.