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US3666003A Expired / Lapsed US ⏱️ 0.0 years remaining

Water heater unit

Assignee: HARSCH Corp (HARSCO)
•
Filing: 1970-05-28
•
Granted: 1972-05-30
•
Expires: 1990-05-28
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Abstract

Abstract A water heating and supply system is provided, comprising in combination, a water storage tank having a cold water supply inlet and a heated water service outlet and supply conduit system, and a heater shroud extending into the upper level of the tank; the shroud being arranged at its inner end in closed fluid flow communication with an intake manifold means drawing water from substantially throughout the vertical range of the interior of the tank. A heater is disposed within the shroud and operates under control of a heat supply regulator. A by-pass circulating conduit system is provided including a continuously operating pump having its intake in fluid communication with the interior of said shroud adjacent the outer end thereof and its discharge arranged to deliver water into the bottom level of said tank. The return from the heated water supply system is arranged in open communication with said by-pass conduit system, Hence, whenever water is withdrawn from the service outlet, replacement cold feed water moves through said supply inlet and is thereby mixed into the water being circulated throughout the entire vertical extent of the tank from which the intake manifold draws water from substantially all levels within the tank. A water temperature sensor is disposed in the region of service water withdrawal from the heater shroud, and is operable to regulate the heat supply. The invention features improved water temperature stratification control in systems designed for such purposes.

Inventors

  • 👤 John A Clark Jr
  • 👤 Lemuel J Morgan
  • 👤 Robert F Kirschner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 17:50
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/08; F24D3/082; F24H; F24H1/00; F24H1/18; F24H1/20; F24H1/208; F24H9/00; F24H9/12; F24H9/13; F24H9/133

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 161 words
A water heating and storage system of the immersion heater type comprising, a water carrying storage tank, an immersion heater extending into an upper level portion of said tank and comprising an elongate shroud projecting through a wall portion of said tank and having a heat supply means disposed within said shroud for heating water moving therethrough, a hot water service withdrawal connection into and leading from the outer end of said shroud, a heat supply regulator responsive to the water temperature in the region of said withdrawal connection, a storage water circulation by-pass system including a pump drawing water from interiorly of said shroud and discharging into the main body portion of said tank, and replacement water supply means delivering into said tank, said shroud having its intake end portion in sealed fluid communication with vertically disposed tank water intake manifold means having fluid flow open communication with the water interiorly of said tank at substantially all vertical levels thereof.
Claim 2
Dependent Claim 161 words
A water heating and storage system of the immersion heater type comprising, a water carrying storage tank, an immersion heater extending into an upper level portion of said tank and comprising an elongate shroud projecting through a wall portion of said tank and having a heat supply means disposed within said shroud for heating water moving therethrough, a hot water service withdrawal connection into and leading from the outer end of said shroud, a heat supply regulator responsive to the water temperature in the region of said withdrawal connection, a storage water circulation by-pass system including a pump drawing water from interiorly of said shroud and discharging into the main body portion of said tank, and replacement water supply means delivering into said tank, said shroud having its intake end portion in sealed fluid communication with vertically disposed tank water intake manifold means having fluid flow open communication with the water interiorly of said tank at substantially all vertical levels thereof.
Claim 3
Dependent Claim 45 words
A water heating system as set forth in claim 1, wherein said shroud extends both inwardly and outwardly of said tank wall and wherein said service water withdrawal and circulating by-pass and heat supply regulator devices are connected into the outer end of said shroud.
Claim 4
Dependent Claim 24 words
A water heating system as set forth in claim 1, wherein said heat supply means comprises a steam conducting bundle of return bent tubes.
Claim 5
Dependent Claim 50 words
A water heating system as set forth in claim 2 wherein said manifold means comprises a conduit extending vertically inside said tank substantially throughout the vertical extent thereof and having intake apertures so arranged as to draw water from substantially all levels within said tank for delivery into said shroud.
Claim 6
Dependent Claim 36 words
A water heating system as set forth in claim 4 wherein said replacement water supply means includes a cold water inlet and a heated water return inlet both leading into the bottom level of said tank.
Claim 7
Dependent Claim 39 words
A water heating system as set forth in claim 5 wherein said cold water inlet is provided with means causing inflowing water to be deflected away from said manifold means and substantially across the lower level of said tank.

References Cited (Backward Citations)

US3276517A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-30 1975-11-29 1976-05-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-30 1979-11-29 1980-05-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-30 1983-11-29 1984-05-30 $7700.00 Window Closed / Lapsed

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