Patent US4275510A successfully refreshed from Google Patents.
US4275510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat recovery in a laundry system
Assignee: Individual
•
Filing: 1979-06-01
•
Granted: 1981-06-30
•
Expires: 1999-06-01
Abstract
Abstract In a laundry system including a washer, a dryer, and a water heater, the improvement of using a heat pipe to recover waste heat, whether it be from the hot air exhaust of the dryer or from the conductive losses from the dryer and to transfer that heat to the feed water of the water heater.
Inventors
- 👤 Odean F. George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:21
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0233; D; D06; D06F; D06F39/00; D06F39/30; D06F58/00; D06F58/20; F28D15/0275; F28D15/04; F28D21/00; F28D21/0001; F28D21/0014; Y; Y02; Y02B; Y02B40/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
In a laundry system comprising a washer employing hot water, a dryer having a fire box, a water heater, and water pipe circulating system conducting cool water to said water heater and distributing hot water to said washer, the improvement which comprises a heat pipe having the bottom thereof in heat conductive contact with the outside surface of said fire box of said dryer and the top of said heat pipe in heat conductive contact with said water pipe circulation system spaced above said dryer in the portion thereof conducting cool water to said water heater.
Claim 2
Dependent Claim
96 words
In a laundry system comprising a washer employing hot water, a dryer having a fire box, a water heater, and water pipe circulating system conducting cool water to said water heater and distributing hot water to said washer, the improvement which comprises a heat pipe having the bottom thereof in heat conductive contact with the outside surface of said fire box of said dryer and the top of said heat pipe in heat conductive contact with said water pipe circulation system spaced above said dryer in the portion thereof conducting cool water to said water heater.
Claim 3
Dependent Claim
36 words
The system of claim 1 wherein water in said water pipe circulation system is in a loop of pipe comprising an outgoing leg and a return leg, both legs being in contact with said heat pipe.
Claim 4
Dependent Claim
33 words
The system of claim 1 wherein said heat pipe includes a top end, further comprising means for connecting said top end to said water pipe circulation system for maximizing the heat transfer therebetween.
Claim 5
Dependent Claim
108 words
In a laundry system comprising a multiplicity of washers employing hot water, a multiplicity of dryers, each having a fire box, means for heating water to supply said hot water to said washers, and a water pipe circulation system connecting said heating means and said washers, the improvement which comprises a heat pipe on each dryer having the bottom of each heat pipe in conductive contact with said fire box of each said dryer to absorb heat from said dryer and the top of each said heat pipe in heat conductive contact with said water pipe circulation means in the portion thereof conducting water into said heating means.
Claim 6
Dependent Claim
108 words
In a laundry system comprising a multiplicity of washers employing hot water, a multiplicity of dryers, each having a fire box, means for heating water to supply said hot water to said washers, and a water pipe circulation system connecting said heating means and said washers, the improvement which comprises a heat pipe on each dryer having the bottom of each heat pipe in conductive contact with said fire box of each said dryer to absorb heat from said dryer and the top of each said heat pipe in heat conductive contact with said water pipe circulation means in the portion thereof conducting water into said heating means.
Claim 7
Dependent Claim
36 words
The system of claim 4 in which each said heat pipe is in contact with the outgoing leg and the return leg of a loop of water pipe internally conducting cool water to said heating means.
References Cited (Backward Citations)
US3050867A
Cited
US3402767A
Cited
US3414475A
Cited
US3771238A
Cited
US3884292A
Cited
US4116266A
Cited
US4037786A
Cited
US4103433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |