US3705574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating and storage system with mixing valve
Assignee: AOS Holding Co
•
Filing: 1971-07-09
•
Granted: 1972-12-12
•
Expires: 1991-07-09
Abstract
Abstract The invention relates to a water heating system in which a single water heater is utilized in combination with a storage tank and pump to provide hot water for various uses. The invention is particularly directed to the use of a thermostatic mixing valve set at a predetermined temperature and located at a juncture between a recirculating conduit from the water heater and the conduit for the flow of water from the storage tank or a source of fresh water supply to the water heater so that water which has already been heated by the water heater may be mixed with the colder water supplied to the water heater to be heated.
Inventors
- 👤 Angelo N Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:23
CPC Classifications
F; F24; F24D; F24D17/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
192 words
In a hot water heating system including a hot water storage tank and a water heater, a water heater circuit for circulation of water from the storage tank through an inlet conduit and the water heater and back to the storage tank through an outlet conduit from the water heater to maintain water in the storage tank at a predetermined temperature, a recirculating conduit connected in the circuit between the inlet and outlet conduits for recirculation of at least a portion of the water discharged from the water heater back through the water heater, a mixing valve disposed in the water heater circuit at the juncture of the inlet and recirculating conduits and being adapted under a predetermined temperature setting to mix the recirculating hot water with colder water flowing in the inlet conduit, pump means disposed in the water heater circuit for effecting upon actuation circulation of the water through the circuit, heating means to heat the water in the water heater, and control means disposed in the water heater circuit to regulate the heating means and the temperature of the water supplied to the storage tank by the water heater.
Claim 2
Dependent Claim
192 words
In a hot water heating system including a hot water storage tank and a water heater, a water heater circuit for circulation of water from the storage tank through an inlet conduit and the water heater and back to the storage tank through an outlet conduit from the water heater to maintain water in the storage tank at a predetermined temperature, a recirculating conduit connected in the circuit between the inlet and outlet conduits for recirculation of at least a portion of the water discharged from the water heater back through the water heater, a mixing valve disposed in the water heater circuit at the juncture of the inlet and recirculating conduits and being adapted under a predetermined temperature setting to mix the recirculating hot water with colder water flowing in the inlet conduit, pump means disposed in the water heater circuit for effecting upon actuation circulation of the water through the circuit, heating means to heat the water in the water heater, and control means disposed in the water heater circuit to regulate the heating means and the temperature of the water supplied to the storage tank by the water heater.
Claim 3
Dependent Claim
34 words
The hot water heating system of claim 1, and a fresh water supply conduit connected to the inlet conduit, and a discharge conduit connected in the water heater circuit for withdrawal of hot water.
Claim 4
Dependent Claim
27 words
The hot water heating system of claim 1, in which the pump means is located in the inlet conduit between the mixing valve and the water heater.
Claim 5
Dependent Claim
52 words
The hot water heating system of claim 1, and a thermostat in the mixing valve for opening and closing passages through the valve for flow of either hot or cold water or actuating the valve to a position where the colder inlet water mixes with the hot water recirculated through the heater.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |