Patent US3568658A successfully refreshed from Google Patents.
US3568658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submersible water heater
Assignee: CMI Terex Corp
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Filing: 1969-03-20
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Granted: 1971-03-09
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Expires: 1989-03-20
Abstract
Abstract A water heater comprising a tank, a generally cylindrical burner can positioned in the tank with its long axis extending in an upward direction, water inlet means at the upper portion of the burner can for flowing water from the tank into the burner can, gas injection means communicating with the upper portion of the burner can for introducing a combustion fluid and air mixture to the burner can, and fluid extraction means communicating with the lower portion of the burner can for evacuating gases and water from the burner can. The gases and water extracted from the burner can are injected back into the water of the tank, and the gases bubble up through the water.
Inventors
- 👤 James D Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/107
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
A water heater or the like comprising a water tank, means for maintaining water in said water tank up to a normal water level, an elongated burner can member positioned in an upright attitude within said tank with a major portion of said burner can member located below the normal water level of said water tank, liquid inlet means defined in said burner can member at a level below the normal water level of said water tank for flowing liquid from said water tank in a downward direction through said burner can member, injection means communicating with said burner can member for introducing a combustion fluid and air mixture to said burner can member, and fluid extraction means communicating with the lower portion of said burner can member for flowing fluids from said burner can member to said water tank at at a at a level below the normal water level of said water tank.
Claim 2
Dependent Claim
155 words
A water heater or the like comprising a water tank, means for maintaining water in said water tank up to a normal water level, an elongated burner can member positioned in an upright attitude within said tank with a major portion of said burner can member located below the normal water level of said water tank, liquid inlet means defined in said burner can member at a level below the normal water level of said water tank for flowing liquid from said water tank in a downward direction through said burner can member, injection means communicating with said burner can member for introducing a combustion fluid and air mixture to said burner can member, and fluid extraction means communicating with the lower portion of said burner can member for flowing fluids from said burner can member to said water tank at at a at a level below the normal water level of said water tank.
Claim 3
Dependent Claim
23 words
The invention of claim 1 wherein said fluid extraction means comprises means for pumping both liquid and gas from said burner can member.
Claim 4
Dependent Claim
36 words
The invention of claim 1 wherein said liquid inlet means comprises a weir constructed to flow liquid over substantially all of the portion of the inside surface of said burner can member located below said weir.
Claim 5
Dependent Claim
36 words
The invention of claim 1 wherein said burner can is generally of cylindrical configuration with its long axis extending vertically, and with the liquid inlet means comprising an annular opening defined about said burner can member.
Claim 6
Dependent Claim
29 words
The invention of claim 1 wherein said liquid inlet means comprises at least one aperture in said burner can member and means for varying the opening of said aperture.
Claim 7
Dependent Claim
58 words
The invention of claim 1 wherein said burner can member is positioned on one side of said tank, said fluid extraction means comprises a conduit extending from said burner can through the other side of said tank, and pump means positioned outside said tank having its inlet communicating with said conduit and its outlet communicating with said tank.
Claim 8
Dependent Claim
132 words
A water heater or the like comprising a tank, a burner can member positioned in said tank on one side of said tank, liquid inlet means at the upper portion of said burner can member for flowing liquid from said tank into said burner can member, injection means communicating with said burner can member for introducing a combustion fluid and air mixture to said burner can member, and fluid extraction means comprising a conduit communicating at one of its ends with the lower portion of said burner can member and extending from said burner can member through the other side of said tank, and pump means positioned outside said tank and having its inlet communicating with said conduit and its outlet communicating with said conduit and its outlet communicating with said tank.
Claim 9
Dependent Claim
132 words
A water heater or the like comprising a tank, a burner can member positioned in said tank on one side of said tank, liquid inlet means at the upper portion of said burner can member for flowing liquid from said tank into said burner can member, injection means communicating with said burner can member for introducing a combustion fluid and air mixture to said burner can member, and fluid extraction means comprising a conduit communicating at one of its ends with the lower portion of said burner can member and extending from said burner can member through the other side of said tank, and pump means positioned outside said tank and having its inlet communicating with said conduit and its outlet communicating with said conduit and its outlet communicating with said tank.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |