US3799248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damper construction
Assignee: Thermal Science Corp
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Filing: 1972-05-22
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Granted: 1974-03-26
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Expires: 1992-05-22
Abstract
Abstract An improved damper construction for a heat exchanger in which heating or cooling surface is contained within a hollow wall structure and air entering through an inlet of the wall structure flows in contact with the heating/cooling surface and exits through an elongated outlet of the wall structure. The improved damper is hollow and has slot apertures that allow a limited outflow of air when the damper is closed, and present less interference to air flow when the damper is open.
Inventors
- 👤 N Wenig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:53
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/02; F24D19/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86743
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
In a heat exchanger having a hollow wall structure defining an inlet and an outlet, heat exchange surface means positioned inside said wall structure for heat exchange with air entering through the inlet and exiting through the outlet, the improvement which comprises an elongated damper having a pair of resilient elongated lip panels connected to an elongated web to define a hollow damper supported from said wall structure and rotatably moveable relative thereto between an open limit position and a closed limit position in which the damper engages said wall structure to substantially completely obstruct said outlet, and means defining a plurality of apertures in said web of the damper spaced-apart along the length thereof to allow a limited outflow of air therethrough when the damper is in said closed limit position, whereby said damper is operable to selectively regulate the airflow through said outlet between a maximum airflow when the damper is in said open limit position, and a minimum airflow established by said apertures when the damper is in said closed limit position.
Claim 2
Dependent Claim
175 words
In a heat exchanger having a hollow wall structure defining an inlet and an outlet, heat exchange surface means positioned inside said wall structure for heat exchange with air entering through the inlet and exiting through the outlet, the improvement which comprises an elongated damper having a pair of resilient elongated lip panels connected to an elongated web to define a hollow damper supported from said wall structure and rotatably moveable relative thereto between an open limit position and a closed limit position in which the damper engages said wall structure to substantially completely obstruct said outlet, and means defining a plurality of apertures in said web of the damper spaced-apart along the length thereof to allow a limited outflow of air therethrough when the damper is in said closed limit position, whereby said damper is operable to selectively regulate the airflow through said outlet between a maximum airflow when the damper is in said open limit position, and a minimum airflow established by said apertures when the damper is in said closed limit position.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |