Patent US3756218A successfully refreshed from Google Patents.
US3756218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grate
Assignee: Individual
•
Filing: 1972-03-15
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Granted: 1973-09-04
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Expires: 1992-03-15
Abstract
Abstract A grate for supporting combustible material during burning having a cross member; legs mounted on the cross member adapted to support the member in elevated, horizontal position; and a plurality of air conduits mounted on the cross member and extended outwardly and downwardly therefrom so as to define a platform for the support of the material which is inclined toward the cross member; each conduit having an entrance remote from the member and an exit adjacent to the member so as to permit air heated by combustion to be drawn upwardly in convection currents through the conduits for discharge against the cross member to cool the grate and to improve combustion by establishing a flow of air about the material.
Inventors
- 👤 L Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:39
CPC Classifications
F; F23; F23H; F23H3/00; F23H3/02; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/193
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
233 words
A grate for use in the burning of logs in an open fireplace, comprising: A. a cross member of a cylindrical configuration formed of a heat-conducting material; B. means including a plurality of similarly configured, vertically oriented legs fixed to said cross member adapted to support said cross member above the plane of a floor of a selected open fireplace, within the opening thereof and at the interface of a heated body of atmosphere and a body of atmosphere to be heated; C. a plurality of elongated tubular members for supporting logs in a burning state arranged in coplanar relation, each said tubular member being suspended at one end thereof from said cross member, and disposed at a downward inclination with respect to said cross member; D. means defining within the uppermost end of each of said elongated members a discharge opening disposed in juxtaposition with the external surface of said cross member for discharging heated air at said interface; and E. means defining within the lowermost end of each of said elongated members an intake opening for receiving air from said heated body of atmosphere, whereby the elongated members are cooled as air is drawn through the intake openings of said elongated tubular members, further heated within the tubular members, as heat is transferred thereto, and finally discharged from the uppermost ends of said tubular members at said interface bodies of atmosphere.
Claim 2
Dependent Claim
233 words
A grate for use in the burning of logs in an open fireplace, comprising: A. a cross member of a cylindrical configuration formed of a heat-conducting material; B. means including a plurality of similarly configured, vertically oriented legs fixed to said cross member adapted to support said cross member above the plane of a floor of a selected open fireplace, within the opening thereof and at the interface of a heated body of atmosphere and a body of atmosphere to be heated; C. a plurality of elongated tubular members for supporting logs in a burning state arranged in coplanar relation, each said tubular member being suspended at one end thereof from said cross member, and disposed at a downward inclination with respect to said cross member; D. means defining within the uppermost end of each of said elongated members a discharge opening disposed in juxtaposition with the external surface of said cross member for discharging heated air at said interface; and E. means defining within the lowermost end of each of said elongated members an intake opening for receiving air from said heated body of atmosphere, whereby the elongated members are cooled as air is drawn through the intake openings of said elongated tubular members, further heated within the tubular members, as heat is transferred thereto, and finally discharged from the uppermost ends of said tubular members at said interface bodies of atmosphere.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |