US3332478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water heating apparatus
Assignee: RICHMOND ENGINEERING Co I
•
Filing: 1966-08-15
•
Granted: 1967-07-25
•
Expires: 1986-08-15
Abstract
No abstract record available.
Inventors
- 👤 Fred Q Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:05
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/08; F24D3/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A HEAT EXCHANGER, THE COMBINATION OF A CYLINDRICAL TANK PROVIDED ADJACENT ITS OPPOSITE ENDS WITH AN INLET AND AN OUTLET FOR A LIQUID TO BE HEATED, A PAIR OF TUBE SHEETS PROVIDED AT THE OPPOSITE ENDS OF SAID TANK, AT LEAST ONE OF SAID TUBE SHEETS BEING REMOVABLE, A HEAT EXCHANGE COIL ASSEMBLY DISPOSED IN THE TANK AND COMPRISING A PULRALITY OF COIL UNITS NESTED TOGETHER IN CONCENTRIC RELATION, A PLURALITY OF PAIRS OF TUBE RINGS HAVING THE ENDS OF ONLY ONE OF THE COIL UNITS SECURED THEREIN, AND MEANS REMOVABLY AND INDIVIDUALLY ATTACHING SAID RINGS TO SAID TUBE SHEETS, WHEREBY EACH COIL UNIT WITH ITS RINGS MAY BE REMOVED FROM THE TANK INDEPENDENTLY OF THE OTHER COIL UNITS.
Claim 2
Dependent Claim
120 words
IN A HEAT EXCHANGER, THE COMBINATION OF A CYLINDRICAL TANK PROVIDED ADJACENT ITS OPPOSITE ENDS WITH AN INLET AND AN OUTLET FOR A LIQUID TO BE HEATED, A PAIR OF TUBE SHEETS PROVIDED AT THE OPPOSITE ENDS OF SAID TANK, AT LEAST ONE OF SAID TUBE SHEETS BEING REMOVABLE, A HEAT EXCHANGE COIL ASSEMBLY DISPOSED IN THE TANK AND COMPRISING A PULRALITY OF COIL UNITS NESTED TOGETHER IN CONCENTRIC RELATION, A PLURALITY OF PAIRS OF TUBE RINGS HAVING THE ENDS OF ONLY ONE OF THE COIL UNITS SECURED THEREIN, AND MEANS REMOVABLY AND INDIVIDUALLY ATTACHING SAID RINGS TO SAID TUBE SHEETS, WHEREBY EACH COIL UNIT WITH ITS RINGS MAY BE REMOVED FROM THE TANK INDEPENDENTLY OF THE OTHER COIL UNITS.
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) | 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 |