Patent US3687128A successfully refreshed from Google Patents.
US3687128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instant water heater
Assignee: Individual
•
Filing: 1970-02-25
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Granted: 1972-08-29
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Expires: 1990-02-25
Abstract
Abstract A portable water heater for use in camping, mobile trailers, and pickup campers, that will rapidly heat quantities of water efficiently and safely. Heat is generated by burning bottled propane gas delivered through a simple burner apparatus, and the flame is directed into a surrounding water heating system through which water is circulated to be heated in a matter of seconds. The water heater may include a built in water supply or it may be adapted to connection to an external water container. The temperature of the hot water generated is regulated by the volume of water pushed through the water heating system.
Inventors
- 👤 Garold H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:15
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/06; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/603; C08G69/00; C08G69/48; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/59; D06M15/592; F24H1/08; F24H1/10; F24H1/12; F24H1/14; F24H1/145
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
243 words
A portable, instant hot water heater comprising a first housing; a burner unit having a second housing mounted within the first housing and having a fuel nozzle directed into the second housing at one end thereof; first vent means through the second housing at the end of the housing opposite the fuel nozzle; second vent means through the first housing in the vicinity of the vent means through the second housing, whereby heat from the burner unit vented through said second housing is vented through said first housing; water heating system means providing means for circulating water therethrough, spaced from the burner unit and between the burner unit and the vent means through the second and first housings; a water reservoir; pump means on the exterior of the first housing; means for controlling the pump means to regulate the velocity of liquid pumped therethrough; means coupling the pump means, the reservoir and the water heating system, whereby water is pumped from the reservoir and into the water heating system upon operation of the pump means; an outlet nozzle connected to the heating system and projecting outwardly of the housings whereby water pumped into and through the heating system is discharged through the outlet nozzle; attachment means connected exteriorly of said first housing for attaching a source of combustible gas under pressure thereon, said attachment means including a valve to control flow from said source; and means connecting said valve to said burner unit.
Claim 2
Dependent Claim
243 words
A portable, instant hot water heater comprising a first housing; a burner unit having a second housing mounted within the first housing and having a fuel nozzle directed into the second housing at one end thereof; first vent means through the second housing at the end of the housing opposite the fuel nozzle; second vent means through the first housing in the vicinity of the vent means through the second housing, whereby heat from the burner unit vented through said second housing is vented through said first housing; water heating system means providing means for circulating water therethrough, spaced from the burner unit and between the burner unit and the vent means through the second and first housings; a water reservoir; pump means on the exterior of the first housing; means for controlling the pump means to regulate the velocity of liquid pumped therethrough; means coupling the pump means, the reservoir and the water heating system, whereby water is pumped from the reservoir and into the water heating system upon operation of the pump means; an outlet nozzle connected to the heating system and projecting outwardly of the housings whereby water pumped into and through the heating system is discharged through the outlet nozzle; attachment means connected exteriorly of said first housing for attaching a source of combustible gas under pressure thereon, said attachment means including a valve to control flow from said source; and means connecting said valve to said burner unit.
Claim 3
Dependent Claim
23 words
A portable, instant hot water heater as in claim 1, wherein the pump means is coupled between the reservoir and the heating system.
Claim 4
Dependent Claim
19 words
A portable, instant hot water heater as in claim 2, wherein the pump means comprises a manually operated pump.
Claim 5
Dependent Claim
45 words
A portable, instant hot water heater as in claim 1, wherein the pump means comprises an air pump mounted to pressurize the reservoir; a control valve between the reservoir and the heating system; an operating handle for the control valve extending exteriorly of the housing.
Claim 6
Dependent Claim
136 words
A portable, instant hot water heater as in claim 1, wherein the heating system includes a hollow, cylindrical jAcket having an intake connected to the reservoir; a vertical baffle within the jacket and adjacent to the intake extending thereinto and an outlet adjacent to baffle on the opposite side thereof as the intake and extending from the interior of the jacket outwardly; a plurality of spaced-apart flat-sided tubes extending vertically within said water jacket; means interconnecting the interiors of said tubes and the interior of the water jacket for fluid flow therebetween; and heat conductive fins extending from a flat-surface of each of said tubes away from the water jacket and into the area above the burner, the lower ends of said fins being positioned to be directly heated by a flame emanating from said burner.
Claim 7
Dependent Claim
22 words
A portable, instant hot water heater as in claim 2, wherein the reservoir is within the first housing and is transportable therewith.
Claim 8
Dependent Claim
26 words
A portable, instant hot water heater as in claim 2, wherein the reservoir is separate from the first and second housings and is transportable separately therefrom.
Claim 9
Dependent Claim
22 words
A portable, instant hot water heater as in claim 3, wherein the reservoir is within the first housing and is transportable therewith.
Claim 10
Dependent Claim
26 words
A portable, instant hot water heater as in claim 3, wherein the reservoir is separate from the first and second housings and is transportable separately therefrom.
Claim 11
Dependent Claim
143 words
A portable, instant hot water heater as in claim 8, wherein the heating system includes a hollow, cylindrical water jacket forming the second housing and having an intake connected to the reservoir; a vertical baffle within the jacket and adjacent to the intake extending thereinto and an outlet adjacent to the baffle on the opposite side thereof from the intake and extending from the interior of the jacket outwardly; a plurality of spaced-apart flat-sided tubes extending vertically within said water jacket; means interconnecting the interiors of said tubes and the interior of the water jacket for fluid flow therebetween; and heat conductive fins extending from a flat-surface of each of said tubes away from the water jacket and into the area above the burner, the lower ends of said fins being positioned to be directly heated by a flame emanating from said burner.
Claim 12
Dependent Claim
143 words
A portable, instant hot water heater as in claim 9, wherein the heating system includes a hollow, cylindrical water jacket forming the second housing and having an intake connected to the reservoir; a vertical baffle within the jacket and adjacent to the intake extending thereinto and an outlet adjacent to the baffle on the opposite side thereof from the intake and extending from the interior of the jacket outwardly; a plurality of spaced-apart flat-sided tubes extending vertically within said water jacket; means interconnecting the interiors of said tubes and the interiors of the water jacket for fluid flow therebetween; and heat conductive fins extending from a flat-surface of each of said tubes away from the water jacket and into the area above the burner, the lower ends of said fins being positioned to be directly heated by a flame emanating from said burner.
Claim 13
Dependent Claim
198 words
A portable, instant hot water heater comprising a housing assembly having vent means at one end thereof; a burner unit having means for directing a flame into the housing assembly and towards said vent means; water heating system means inside the housing assembly, said water heating system means providing means for circulating water therethrough and being spaced from the burner unit and between the burner unit and the vent means; a water reservoir; pump means mounted on the exterior of the housing assembly; means for controlling the pump means to selectively regulate the velocity of liquid pumped therethrough; means coupling the pump means, the reservoir and the water heating system whereby water is pumped from the reservoir and into the water heating system upon operation of the pump means; an outlet nozzle conneCted to the heating system and projecting outwardly of the housing assembly whereby water pumped into and through the heating system is discharged through the outlet nozzle; attachment means connected exteriorly of the housing assembly for attaching a source of combustible gas under pressure thereon, said attachment means including a valve to control flow from said source and a means of releasing gas from said source.
Claim 14
Dependent Claim
198 words
A portable, instant hot water heater comprising a housing assembly having vent means at one end thereof; a burner unit having means for directing a flame into the housing assembly and towards said vent means; water heating system means inside the housing assembly, said water heating system means providing means for circulating water therethrough and being spaced from the burner unit and between the burner unit and the vent means; a water reservoir; pump means mounted on the exterior of the housing assembly; means for controlling the pump means to selectively regulate the velocity of liquid pumped therethrough; means coupling the pump means, the reservoir and the water heating system whereby water is pumped from the reservoir and into the water heating system upon operation of the pump means; an outlet nozzle conneCted to the heating system and projecting outwardly of the housing assembly whereby water pumped into and through the heating system is discharged through the outlet nozzle; attachment means connected exteriorly of the housing assembly for attaching a source of combustible gas under pressure thereon, said attachment means including a valve to control flow from said source and a means of releasing gas from said source.
References Cited (Backward Citations)
CA508231A
Cited
GB535230A
Cited
US2291023A
Cited
US2860917A
Cited
US3039454A
Cited
US3192916A
Cited
US3401673A
Cited
US3533380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |