Patent US3332477A successfully refreshed from Google Patents.
US3332477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating apparatus
Assignee: RICHMOND ENGINEERING Co I
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Filing: 1965-01-05
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Granted: 1967-07-25
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Expires: 1985-01-05
Abstract
No abstract record available.
Inventors
- 👤 Fred Q Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:00
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/08; F24D3/082; F28; F28D; F28D7/00; F28D7/02; F28D7/024; F28F; F28F2280/00; F28F2280/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
IN A HEAT EXCHANGER, THE COMBINATION OF AN ELONGATED CASING PROVIDED ADJACENT ITS OPPOSITE ENDS WITH AN INLET AND OUTLET FOR A LIQUID TO BE HEATED, A PAIR OF HEADERS FOR A HEATING MEDIUM REMOVABLY MOUNTED AT THE OPPOSITE ENDS OF SAID CASING, A HEAT EXCHANGE COIL ASSEMBLY DISPOSED IN THE CASING AND COMPRISING PAIRS OF COIL UNITS NESTED TOGETHER IN CONCENTRIC RELATION THE COILS IN EACH PAIR BEING WOUND IN RELATIVELY OPPOSITE DIRECTIONS AND HAVING FREE ENDS LOCATED ON A COMMON CIRCLE, PAIRS OF CONCENTRIC TUBE RINGS PROVIDED AT THE ENDS OF SAID COIL ASSEMBLY AND HAVING THE FREE ENDS OF THE RESPECTIVE COIL UNIT SECURED THEREIN, THE RINGS AT THE OPPOSITE END OF SAID COIL ASSEMBLY BEING JUXTAPOSED TO THE RESPECTIVE HEADERS AND SAID HEADERS BEING APERTURED WHEREBY THE ENDS OF THE COILS IN SAID RINGS MAY COMMUNICATE WITH THE INTERIOR OF THE HEADERS, AND MEANS REMOVABLY AND INDEPENDENTLY ATTACHING SAID RINGS TO THE HEADERS, WHEREBY EACH PAIR OF COIL UNITS WITH ITS RINGS MAY BE REMOVED FROM SAID CASING UPON REMOVAL OF SAID ATTACHING MEANS AND OF AT LEAST ONE OF THE HEADERS.
Claim 2
Dependent Claim
186 words
IN A HEAT EXCHANGER, THE COMBINATION OF AN ELONGATED CASING PROVIDED ADJACENT ITS OPPOSITE ENDS WITH AN INLET AND OUTLET FOR A LIQUID TO BE HEATED, A PAIR OF HEADERS FOR A HEATING MEDIUM REMOVABLY MOUNTED AT THE OPPOSITE ENDS OF SAID CASING, A HEAT EXCHANGE COIL ASSEMBLY DISPOSED IN THE CASING AND COMPRISING PAIRS OF COIL UNITS NESTED TOGETHER IN CONCENTRIC RELATION THE COILS IN EACH PAIR BEING WOUND IN RELATIVELY OPPOSITE DIRECTIONS AND HAVING FREE ENDS LOCATED ON A COMMON CIRCLE, PAIRS OF CONCENTRIC TUBE RINGS PROVIDED AT THE ENDS OF SAID COIL ASSEMBLY AND HAVING THE FREE ENDS OF THE RESPECTIVE COIL UNIT SECURED THEREIN, THE RINGS AT THE OPPOSITE END OF SAID COIL ASSEMBLY BEING JUXTAPOSED TO THE RESPECTIVE HEADERS AND SAID HEADERS BEING APERTURED WHEREBY THE ENDS OF THE COILS IN SAID RINGS MAY COMMUNICATE WITH THE INTERIOR OF THE HEADERS, AND MEANS REMOVABLY AND INDEPENDENTLY ATTACHING SAID RINGS TO THE HEADERS, WHEREBY EACH PAIR OF COIL UNITS WITH ITS RINGS MAY BE REMOVED FROM SAID CASING UPON REMOVAL OF SAID ATTACHING MEANS AND OF AT LEAST ONE OF THE HEADERS.
References Cited (Backward Citations)
GB199210A
Cited
US1768222A
Cited
US2081043A
Cited
US2196683A
Cited
US2349143A
Cited
US3228463A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |