Draft control arrangement for combustion apparatus
Patent
·
OSTI ID:6056759
The invention discloses a draft control arrangement having bimetallic damper elements mounted in a draft hood and adapted to change shape in response to temperature change to open and close the flow passage for vent gases from a combustion apparatus. The damper elements are positioned in the hood relatively close to the source of hot flue gases to provide faster opening and less tendency for vent gas spillage. When open the damper elements cooperate with stationary walls of the draft hood so that the resulting streamlined passage presents minimum flow resistance. In certain embodiments the damper elements are arranged to undergo a spreading action during opening movement to achieve a disproportionately large passage for the vent gases during the initial phase of opening. In another embodiment a damper unit is mounted separate from the draft hood and provides the same operating results as the other embodiments.
- Assignee:
- TIC; EDB-79-131066
- Patent Number(s):
- US 4159078
- OSTI ID:
- 6056759
- Country of Publication:
- United States
- Language:
- English
Similar Records
Damper construction for a gas fired combustion apparatus
Damper construction for a gas fired combustion apparatus
Thermally controlled vent damper
Patent
·
Tue Sep 15 00:00:00 EDT 1981
·
OSTI ID:5878634
Damper construction for a gas fired combustion apparatus
Patent
·
Tue Sep 30 00:00:00 EDT 1980
·
OSTI ID:6796529
Thermally controlled vent damper
Patent
·
Tue Jul 17 00:00:00 EDT 1984
·
OSTI ID:6505398