US3570423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chimney aspirator
Assignee: Individual
•
Filing: 1969-04-09
•
Granted: 1971-03-16
•
Expires: 1989-04-09
Abstract
Abstract Insulating material surrounds the outwardly disposed exhaust end portion of a chimney and a jacket, having inlet and outlet ports, loosely surrounds the insulated end portion of the chimney. A blower communicates with the inlet port of the jacket and moves ambient air therethrough generating a venturi action for the exhaust end of the chimney.
Inventors
- 👤 Myron E Hemmingson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:50
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/20; F23; F23L; F23L17/00; F23L17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
In a heated gas exhaust system including a chimney having its exhaust end portion projecting through a building wall and exposed to the atmosphere, the improvement comprising: insulating material surrounding the exhaust end portion of said chimney; means for increasing heated gas flow through said chimney including a jacket having a wall coaxially surrounding the exhaust end portion of said chimney in spaced-apart relation; a ring closing one end of said jacket and connecting said jacket to the periphery of said chimney adjacent said building wall, said jacket having an inlet opening in its wall adjacent its closed end, the other end of said jacket being open and projecting beyond the exhaust end of said chimney; a laterally extending tube connected with said jacket around the inlet opening; and a blower forcing air into said jacket through said tube, a vent cap shielding the open end of said jacket.
Claim 2
Dependent Claim
149 words
In a heated gas exhaust system including a chimney having its exhaust end portion projecting through a building wall and exposed to the atmosphere, the improvement comprising: insulating material surrounding the exhaust end portion of said chimney; means for increasing heated gas flow through said chimney including a jacket having a wall coaxially surrounding the exhaust end portion of said chimney in spaced-apart relation; a ring closing one end of said jacket and connecting said jacket to the periphery of said chimney adjacent said building wall, said jacket having an inlet opening in its wall adjacent its closed end, the other end of said jacket being open and projecting beyond the exhaust end of said chimney; a laterally extending tube connected with said jacket around the inlet opening; and a blower forcing air into said jacket through said tube, a vent cap shielding the open end of said jacket.
References Cited (Backward Citations)
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |