Downfired high efficiency gas-fired water heater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 25, 2017
Issued Date -
N/A
app pub date -
Jul 15, 2013
filing date -
Aug 22, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A high efficiency downfired gas water heater is provided which has a tank for storing water to be heated, a combustion chamber extending downwardly through a top end of the tank, and a gas burner operative to create hot combustion products within the combustion chamber. At the bottom end of the tank is a transfer chamber coupled to an external discharge conduit and to a single pass heat exchanger, in the form of multiple flue tubes. extending vertically through the tank and connected to the combustion chamber. In one embodiment of the water heater the burner is a power burner which forces the combustion products sequentially through the combustion chamber, heat exchanger, transfer chamber and discharge conduit. In another embodiment of the water heater a draft inducer fan is used to draw the combustion products through this path from the combustion chamber.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2013 Application Filing Year
- F24H Class
- 262 Applications Filed
- 223 Patents Issued To-Date
- 85.12 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- F24H Class
- 30.58 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 25, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 25, 2029 |
