Injection apparatus for an atmospheric burner in a gas heating apparatus, especially of the infrared type, and heating apparatus provided with such an injection device
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United States of America Patent
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Feb 10, 1998
Grant Date -
N/A
app pub date -
Mar 1, 1995
filing date -
Mar 1, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an injection device for burner heating apparatus provided with an air/gas mixture conduit including a Venturi element. This injection device comprises an injector holding tube (14), secured to a valve body (15) divided internally into two chambers by a membrane (23): an idle chamber (24) subjected to the pressure of the gas and communicating with the injector holding tube (14), and a compensation chamber (25) set to atmospheric pressure, enclosing a spring (27) able to urge the membrane (23) toward an idle mode state. This injection device comprises further a rod (31) secured to the membrane (23) and associated with idle mode stop means (34), said rod being extended by a tapered needle (33) arranged to traverse the injector (13) and determine with the latter a cross-section for the idle mode gas outlet, when the pressure of the gas is less than or equal to the idle mode pressure.
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