US4150787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for saving energy in preparing hot water for household
Assignee: Individual
•
Filing: 1978-04-04
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Granted: 1979-04-24
•
Expires: 1998-04-04
Abstract
Abstract A method and an arrangement for saving energy in preparing hot water for household, in that warm waste water from bathtub and shower, etc. in the same household is used for preheating by means of a heat exchanger of water from the water distribution system to the water heater in the household.
Inventors
- 👤 Chris R. Braathen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:03
CPC Classifications
F; F28; F28D; F28D20/00; F28D20/0034; F24; F24D; F24D17/00; F24D17/0005; F24D17/001; F28D1/00; F28D1/06; F24D2200/00; F24D2200/16; F24D2200/20; Y; Y02; Y02B; Y02B30/00; Y02B30/18; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S165/00; Y10S165/909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element, which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by an exteriorly heat insulated mantle with an inlet at the top of the mantle, for warm waste water from bathtub and shower, etc. and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap at the outlet of which being at the level of the said inlet.
Claim 2
Dependent Claim
103 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element, which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by an exteriorly heat insulated mantle with an inlet at the top of the mantle, for warm waste water from bathtub and shower, etc. and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap at the outlet of which being at the level of the said inlet.
Claim 3
Dependent Claim
135 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element, which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by two exteriorly heat insulated mantles, one above the other, the lower one having an inlet at the top of the mantle for warm waste water from bathtub and shower, etc., and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap the outlet of which being at the level of the said inlet, and in the upper mantle is by means of a circulation pump circulated by a heat transfer medium which is exposed to radiation from the sun.
Claim 4
Dependent Claim
135 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element, which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by two exteriorly heat insulated mantles, one above the other, the lower one having an inlet at the top of the mantle for warm waste water from bathtub and shower, etc., and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap the outlet of which being at the level of the said inlet, and in the upper mantle is by means of a circulation pump circulated by a heat transfer medium which is exposed to radiation from the sun.
Claim 5
Dependent Claim
131 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by two exteriorly heat insulated half cylindric adjacent mantles, of which the one has an inlet at the top of warm waste water from bathtub and shower, etc., and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap, the outlet of which being at the level of the said inlet, and the other mantle is by means of a circulation pump circulated by a heat transfer medium which is exposed to radiation from the sun.
Claim 6
Dependent Claim
131 words
An arrangement for saving energy in preparing hot water for households, comprising a heat insulated container with a thermostatically controlled electric heating element which container is supplied with the water to be heated, characterized in that the lower part of the container is surrounded by two exteriorly heat insulated half cylindric adjacent mantles, of which the one has an inlet at the top of warm waste water from bathtub and shower, etc., and an outlet for the warm waste water at the bottom of the mantle, which outlet is connected to a water trap, the outlet of which being at the level of the said inlet, and the other mantle is by means of a circulation pump circulated by a heat transfer medium which is exposed to radiation from the sun.
References Cited (Backward Citations)
US2087363A
Cited
US4037785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |