US4383643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler tank for efficiently circulating low-temperature water
Assignee: Individual
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Filing: 1981-06-22
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Granted: 1983-05-17
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Expires: 2001-06-22
Abstract
Abstract A boiler tank (1) for a hot-water heating system comprises first (2) and second (7) partitions, defining first (4), second (9), and third (10) chambers. Inlet (6) and outlet (6') pipes communicate with the second chamber, a transfer conduit (3) intercommunicates the first and second chambers, and an opening (8) intercommunicates the second and third chambers.
Inventors
- 👤 Lan S. Sohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:50
CPC Classifications
F; F24; F24H; F24H1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
In a hot-water heating system, a boiler tank (1) comprising a first partition (2) defining a first chamber (4) adapted to be heated to vaporize water therein, a second partition (7) defining a second chamber (9) and further defining a third chamber (10) between said first and second chambers, inlet (6) and outlet (6') pipes each communicating with said second chamber, first means (3) for intercommunicating said first and second chambers, and second means (8) for intercommunicating said second and third chambers.
Claim 2
Dependent Claim
82 words
In a hot-water heating system, a boiler tank (1) comprising a first partition (2) defining a first chamber (4) adapted to be heated to vaporize water therein, a second partition (7) defining a second chamber (9) and further defining a third chamber (10) between said first and second chambers, inlet (6) and outlet (6') pipes each communicating with said second chamber, first means (3) for intercommunicating said first and second chambers, and second means (8) for intercommunicating said second and third chambers.
Claim 3
Dependent Claim
22 words
The hot-water heating system of claim 1 wherein each of said inlet and outlet pipes has a one-way check valve (11,11') therein.
Claim 4
Dependent Claim
35 words
The hot-water heating system of claim 1 wherein an outlet of said inlet pipe is positioned vertically below an inlet of said outlet pipe and is further positioned in close proximity to said first partition.
Claim 5
Dependent Claim
22 words
The hot-water heating system of claim 1 wherein said first means comprises a transfer conduit secured between said first and second partitions.
Claim 6
Dependent Claim
36 words
The hot-water heating system of claim 4 wherein said second means comprises an opening formed through said second partition and wherein said inlet and outlet pipes are positioned laterally between said transfer conduit and said opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |