Patent US3667449A successfully refreshed from Google Patents.
US3667449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-operated barbecue grill
Assignee: Big Boy Manufacturing Co Inc
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Filing: 1970-09-08
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Granted: 1972-06-06
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Expires: 1990-09-08
Abstract
Abstract A barbecue grill having a gas burner mounted within a firebowl which is supported above a base by a tubular column. The burner directs flames horizontally into the firebowl and is shielded against fouling by grease drippings from the cooking surface. Pumiceous rock is carried in the firebowl and is heated by the burner flames to re-radiate heat to the cooking surface. A ceramic-coated metal deflector can be provided over the burner to protect the burner and deflect the burner flames downwardly towards the firebowl bottom for heating the pumiceous rock so that the cooking surface is uniformly heated by both direct and radiant heat.
Inventors
- 👤 Laverne O Persinger
- 👤 Merle L Persinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/07; A47J37/0704; A47J37/0713; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85946
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
89 words
A gas-operated barbecue grill comprising: a generally circular firebowl having a bottom and an open top; a burner having a generally circular cross-section mounted centrally within said firebowl, and projecting above said bottom, said burner carrying a series of gas ports which direct flames horizontally into said firebowl; a grease shield extending horizontally outwardly of said gas ports; means for supplying gas to said burner; and a circular wire grill centrally supported above said burner and positioned adjacent said open top, said grill being rotatable relative to said firebowl.
Claim 2
Dependent Claim
89 words
A gas-operated barbecue grill comprising: a generally circular firebowl having a bottom and an open top; a burner having a generally circular cross-section mounted centrally within said firebowl, and projecting above said bottom, said burner carrying a series of gas ports which direct flames horizontally into said firebowl; a grease shield extending horizontally outwardly of said gas ports; means for supplying gas to said burner; and a circular wire grill centrally supported above said burner and positioned adjacent said open top, said grill being rotatable relative to said firebowl.
Claim 3
Dependent Claim
38 words
A gas-operated barbecue grill as defined in claim 1 wherein: said burner includes a lower section carrying said gas ports and an upper section overlying said lower section, said upper section including a flange defining said grease shield.
Claim 4
Dependent Claim
82 words
A gas-operated barbecue grill as defined in claim 1 wherein: said grease shield comprises a deflector overlying said burner, said deflector being dimensioned in such a manner that the outer edge projects both horizontally outwardly and vertically below said gas ports whereby the flames from said gas ports are deflected downwardly by said deflector; and a plurality of pumicious rock are carried in said firebowl bottom, said rock being heated by the deflected flames thereby to radiate heat toward said open top.
Claim 5
Dependent Claim
48 words
A gas-operated barbecue grill as defined in claim 3 wherein: said burner includes a dish-shaped lower section carrying said gas ports and a generally conical cap section overlying said lower section; and said deflector is generally circular and dome-shaped and is supported centrally by said burner cap section.
Claim 6
Dependent Claim
75 words
A barbecue grill of the type adapted to burn gas from an external pressurized supply, said barbecue grill comprising: a geneRally circular firebowl having a bottom, a side and an open top; a shielded circular burner carrying a series of radial gas ports supported centrally within said firebowl and concentric therewith; a circular wire grill centrally supported by said burner adjacent said open end; and means for coupling said burner with the external gas supply.
Claim 7
Dependent Claim
75 words
A barbecue grill of the type adapted to burn gas from an external pressurized supply, said barbecue grill comprising: a geneRally circular firebowl having a bottom, a side and an open top; a shielded circular burner carrying a series of radial gas ports supported centrally within said firebowl and concentric therewith; a circular wire grill centrally supported by said burner adjacent said open end; and means for coupling said burner with the external gas supply.
Claim 8
Dependent Claim
52 words
A barbecue grill as defined in claim 5 wherein: said burner comprises a lower dish-shaped section carrying said gas ports, and an upper generally conical cap section overlying said lower section, said cap section including a radial flange projecting beyond said gas ports thereby forming a grease shield for said gas ports.
Claim 9
Dependent Claim
61 words
A barbecue grill as defined in claim 6 further including: a generally dome-shaped deflector centrally supported by said burner cap section, said deflector overlying said burner and projecting radially beyond said radial flange in such a manner that said deflector forms a grease shield for said gas ports and also deflects flames from said gas ports downwardly towards said firebowl bottom.
Claim 10
Dependent Claim
29 words
A barbecue grill as defined in claim 7 wherein: said deflector is formed from a ceramic-coated metal; and a plurality of pumiceous rock are carried in said firebowl bottom.
Claim 11
Dependent Claim
104 words
A barbecue grill as defined in claim 5 further comprising: a cylindrical ring concentrically mounted within said firebowl bottom, the diameter of said ring being greater than the diameter of said shielded burner; a drain hole through said firebowl bottom between said ring and said burner whereby grease dripping from said burner is collected within said firebowl bottom between said ring and said burner and is drained from said firebowl through said hole; and a plurality of pumicious rock are carried in said firebowl bottom between said side and said ring, said rock serving to radiate heat from said burner toward said open top.
Claim 12
Dependent Claim
47 words
A barbecue grill as defined in claim 9 still further comprising: a cup holder attached to said firebowl bottom and extending downwardly therefrom adjacent said hole; and a cup carried by a holder whereby grease drained from said firebowl through said hole is collected in said cup.
Claim 13
Dependent Claim
69 words
A barbecue grill as defined in claim 5 further comprising: a hood attached to said firebowl side and extending above said open top in such a manner that approximately one-half of said open top is enclosed; and a base having a tubular column extending upwardly therefrom, said column being attached to said firebowl bottom in such a manner that said firebowl is rotatable relative to said column and base.
Claim 14
Dependent Claim
135 words
In a barbecue grill of the type having a gas burner adapted to burn gas from an external pressurized supply, the improvement comprising: a burner having a generally circular horizontal cross-section including: a generally tubular base portion having an enlarged bottom and a top; an upper portion attached to the top of said base portion, said upper portion comprising: a generally dish-shaped lower section extending radially outwardly of said base portion; a cylindrical wall projecting upwardly from the outer edge of said lower section and carrying a plurality of individual gas ports spaced circumferentially around said cylindrical wall; and a generally conical upper section overlying said lower section, said upper section including a radial flange extending radially beyond said cylindrical wall whereby said flange shields said gas ports from grease dropping on said upper section.
Claim 15
Dependent Claim
135 words
In a barbecue grill of the type having a gas burner adapted to burn gas from an external pressurized supply, the improvement comprising: a burner having a generally circular horizontal cross-section including: a generally tubular base portion having an enlarged bottom and a top; an upper portion attached to the top of said base portion, said upper portion comprising: a generally dish-shaped lower section extending radially outwardly of said base portion; a cylindrical wall projecting upwardly from the outer edge of said lower section and carrying a plurality of individual gas ports spaced circumferentially around said cylindrical wall; and a generally conical upper section overlying said lower section, said upper section including a radial flange extending radially beyond said cylindrical wall whereby said flange shields said gas ports from grease dropping on said upper section.
Claim 16
Dependent Claim
41 words
The improvement as defined in claim 12 further comprising: a dome-shaped deflector overlying said upper section, said deflector extending radially beyond said flange and below said gas ports whereby radial flames from said gas ports are deflected downwardly by said deflector.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |