US3582613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-heating device
Assignee: AQUA SURVEY & INSTRUMENT Co
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Filing: 1968-10-11
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Granted: 1971-06-01
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Expires: 1988-10-11
Abstract
Abstract A fluid-heating device comprising a casing, outer and inner chambers therein, a hollow metal core about which spaced turns of Teflon-coated wire is wound and which wire constitutes a heater for raising the temperature of fluid flowing into the inner chamber to a preset range of temperature, a thermistor for sensing temperature of fluid discharged at the top of and from the inner chamber and being adapted for connection to an electrical circuitry which opens and closes a fluid valve associated with an inlet port for the outer chamber. The changers are separated from each other and a filter is provided about the core for preventing foreign material, dirt and the like from passing from the outer to the inner chamber. The core is provided with fluted passageways for upward circulation of the filtered water in the inner chamber.
Inventors
- 👤 Othmar W Pies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:19
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/121
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
A fluid-heating device comprising in combination, a sealed casing having a top and base, a metallic core disposed in said casing and having a bore communicating with the exterior of the core, helical serrations on the external periphery of said core, a plurality of fluted surfaces formed longitudinally in said external periphery thereby providing for passageways for circulation of fluid, a helically wound heating element mounted about said serrations, a spacing being provided between adjacent turns of said heating element for passage of fluid into said passageways, means for energizing the heating element, a filter coextensive in length with the heating element mounted about said metallic core and heating element, there being an inner chamber inside the bore of the core and an outer chamber inside the casing surrounding the filter, an inlet port to the outer chamber, there being fluid flow communication means between the passageways and the interior of the core, and an outlet port from the inner chamber, whereby fluid flowing through said inlet port, through said outer chamber, filter, and each spacing and passageway may be instantaneously heated before discharge at said outlet port.
Claim 2
Dependent Claim
188 words
A fluid-heating device comprising in combination, a sealed casing having a top and base, a metallic core disposed in said casing and having a bore communicating with the exterior of the core, helical serrations on the external periphery of said core, a plurality of fluted surfaces formed longitudinally in said external periphery thereby providing for passageways for circulation of fluid, a helically wound heating element mounted about said serrations, a spacing being provided between adjacent turns of said heating element for passage of fluid into said passageways, means for energizing the heating element, a filter coextensive in length with the heating element mounted about said metallic core and heating element, there being an inner chamber inside the bore of the core and an outer chamber inside the casing surrounding the filter, an inlet port to the outer chamber, there being fluid flow communication means between the passageways and the interior of the core, and an outlet port from the inner chamber, whereby fluid flowing through said inlet port, through said outer chamber, filter, and each spacing and passageway may be instantaneously heated before discharge at said outlet port.
Claim 3
Dependent Claim
45 words
The device of claim 1 including a porous tape wrapped about said heat-conducting element and disposed between such element and said filter, and a pair of rings respectively seated in said top and base mounted about said core and to which said tape is attached
Claim 4
Dependent Claim
33 words
The device of claim 1 in which the fluid flow communication between said passageways and bore is formed by at least one hole is provided in said core between said passageways and bore.
Claim 5
Dependent Claim
25 words
The device of claim 3 wherein the heating element is electrically energized and electrical contact means for said heating element is mounted in said casing.
Claim 6
Dependent Claim
175 words
An instantaneous heating device for a fluid comprising a sealed casing defining an outer chamber about a metallic core having a bore forming an inner chamber communicating with the exterior of the core, a plurality of fluted surfaces formed longitudinally in the external periphery of said core to define passageways extending along the external periphery, helically disposed serrations formed on such periphery, electrical heating means wound about said serrations and electrically insulated from the core and having spacing between adjacent turns thereof and adapted for connection to an electrical source, means including a filter positioned about said heating means, an inlet port for said casing connected to said outer chamber, there being fluid flow communication means between the passageways and the interior of the core, and an outlet port for said casing connected to said inner chamber, whereby water passing from said outer chamber into said inner chamber is metered through said means including said filter into and through said spacing for instantaneous heating thereof, and circulating toward and being discharged from said outlet port.
Claim 7
Dependent Claim
175 words
An instantaneous heating device for a fluid comprising a sealed casing defining an outer chamber about a metallic core having a bore forming an inner chamber communicating with the exterior of the core, a plurality of fluted surfaces formed longitudinally in the external periphery of said core to define passageways extending along the external periphery, helically disposed serrations formed on such periphery, electrical heating means wound about said serrations and electrically insulated from the core and having spacing between adjacent turns thereof and adapted for connection to an electrical source, means including a filter positioned about said heating means, an inlet port for said casing connected to said outer chamber, there being fluid flow communication means between the passageways and the interior of the core, and an outlet port for said casing connected to said inner chamber, whereby water passing from said outer chamber into said inner chamber is metered through said means including said filter into and through said spacing for instantaneous heating thereof, and circulating toward and being discharged from said outlet port.
Claim 8
Dependent Claim
50 words
The device of claim 5 in which said means includes a porous tape wrapped about said heating means and disposed between said heating means and said filter, and a pair of rings respectively seated in the top and base of said sealed casing and to which said tape is attached.
Claim 9
Dependent Claim
29 words
The device of claim 5 in which at least one hole is provided in the wall of said core for providing said communication between its bore and said passageways.
References Cited (Backward Citations)
US546657A
Cited
US1335020A
Cited
US793118A
Cited
US894323A
Cited
US1075978A
Cited
US2103434A
Cited
US2635174A
Cited
US3235084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |