Patent US4122824A successfully refreshed from Google Patents.
US4122824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for extracting heat from a fireplace
Assignee: Individual
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Filing: 1977-11-17
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Granted: 1978-10-31
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Expires: 1997-11-17
Abstract
Abstract A device for extracting heat from a fireplace and directing it into a room including a U-shaped tubular member adapted to fit into the opening of fireplace the length of which is adjustable. The tubular member has an intake opening at one end and an exhaust conduit at the other end together with a fan for causing air to move through the member. The tubular member has a baffle inside thereof whereby air moving through the member is thoroughly warmed prior to its exit out the exhaust conduit. CROSS REFERENCE This is a continuation of application Ser. No. 703,098, filed July 6, 1976, now abandoned.
Inventors
- 👤 Peter M. Borgran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B1/1886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
251 words
A thermal extractor for a fireplace opening comprising: (a) an inverted U-shaped tubular member for securing to the front vertical and horizontal edges of the opening of a fireplace to be heated from heat in the fireplace, (b) said tubular member having a rectangular cross section and including a tubular top central portion having an adjustable length substantially equal to the width of the fireplace opening at the top front edge thereof, (c) a tubular leg portion depending from each end of said top central portion having an adjustable length substantially equal to the height of the fireplace opening at the front side edge thereof, said legs and said top central portion lying in substantially the same plane, (d) one of said legs having an inlet tube member at the lower end thereof, (e) the other of said legs having an outlet tube member at the lower end thereof, (f) said top central portion having a baffle member internally thereof, (g) a fan carried by said inlet tube, (h) said top central portion having a portion slidable within the remaining portion, (i) each of said legs having a portion slidable within the remaining portion, (j) means for securing said portions of said top central portion against displacement, (k) means for securing said portions of each of said leg portions against displacement, (l) a fan carried by said inlet tube member adapted to circulate heated air through said top central portion and said leg portions and out through said outlet tube member.
Claim 2
Dependent Claim
251 words
A thermal extractor for a fireplace opening comprising: (a) an inverted U-shaped tubular member for securing to the front vertical and horizontal edges of the opening of a fireplace to be heated from heat in the fireplace, (b) said tubular member having a rectangular cross section and including a tubular top central portion having an adjustable length substantially equal to the width of the fireplace opening at the top front edge thereof, (c) a tubular leg portion depending from each end of said top central portion having an adjustable length substantially equal to the height of the fireplace opening at the front side edge thereof, said legs and said top central portion lying in substantially the same plane, (d) one of said legs having an inlet tube member at the lower end thereof, (e) the other of said legs having an outlet tube member at the lower end thereof, (f) said top central portion having a baffle member internally thereof, (g) a fan carried by said inlet tube, (h) said top central portion having a portion slidable within the remaining portion, (i) each of said legs having a portion slidable within the remaining portion, (j) means for securing said portions of said top central portion against displacement, (k) means for securing said portions of each of said leg portions against displacement, (l) a fan carried by said inlet tube member adapted to circulate heated air through said top central portion and said leg portions and out through said outlet tube member.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |