Patent ID: 9528712
Filing Date: 2016-12-27
CPC Classification: F23D,F23N,F24D,G05D

Claim Text:
1. A pneumatic modulating burner system comprises: a) a speed control responsive to inputs received from a thermostat, the speed control modulating a blower which provides modulated combustion air and a controlling vacuum proportional to the speed of the blower; b) a pneumatic gas amplifying valve in pneumatic communication with the vacuum via a vacuum conduit, the gas amplifying valve being controlled by the level of vacuum in the vacuum conduit providing modulated combustion gas responsive to the vacuum received from the vacuum conduit; c) wherein modulated combustion air and combustion gas are communicated to a burner for continuously variable firing rates proportional to the blower speed; d) wherein the vacuum conduit is in communication with a first pneumatic damper, wherein the first pneumatic damper is positioned between the blower and gas amplifying valve along the pneumatic control vacuum conduit, for smoothing out vacuum spikes and fluctuations caused by blower fluctuations, thereby providing a dampered vacuum portion of the vacuum conduit, terminates at a first port of the gas amplifying valve, thereby providing smooth vacuum control to the gas amplifying valve.