US3581731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable cooking unit
Assignee: Individual
•
Filing: 1969-02-11
•
Granted: 1971-06-01
•
Expires: 1989-02-11
Abstract
Abstract A flameless combustion method of cooking and portable cooking unit designed to be fueled solely by crumpled paper sheet, such as newspaper. The unit includes an open top firebox. The walls of the firebox optionally have a limited number of small spacedapart air vents adjacent the bottom to admit a limited amount of air to the firebox. A broiler rack fits over the top of the firebox to support the food to be cooked. The broiler rack has an essentially nonforaminous heat-conducting surface covering most of the top open area of the firebox to limit and control combustion of the paper fuel. A food and equipment storage chest is adapted to fit telescopically within the firebox. In one form the unit includes a double walled firebox. In this unit storage space is provided for the broiler rack and for fuel.
Inventors
- 👤 William M Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:10
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/07; A47J37/0763
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A portable food cooking unit comprising: A. a relatively deep firebox adapted to be fueled with crumpled paper sheets, B. said firebox having a bottom, upstanding rigid substantially nonforaminous sidewalls and open top, C. a broiler rack fitted over the open top of said firebox, D. said rack including at least one lower grate having a thin covering nonforaminous heat-conducting nonrigid metal surface thereon, E. said nonforaminous surface substantially covering the open area of the top of said firebox to limit entry of air to the combustion zone therein and inhibit the propagation of flame in said firebox.
Claim 2
Dependent Claim
98 words
A portable food cooking unit comprising: A. a relatively deep firebox adapted to be fueled with crumpled paper sheets, B. said firebox having a bottom, upstanding rigid substantially nonforaminous sidewalls and open top, C. a broiler rack fitted over the open top of said firebox, D. said rack including at least one lower grate having a thin covering nonforaminous heat-conducting nonrigid metal surface thereon, E. said nonforaminous surface substantially covering the open area of the top of said firebox to limit entry of air to the combustion zone therein and inhibit the propagation of flame in said firebox.
Claim 3
Dependent Claim
32 words
A portable cooking unit according to claim 1 further characterized in that said nonforaminous surface covers from about 75 to 90 percent of the open area of the top of the firebox.
Claim 4
Dependent Claim
33 words
A portable cooking unit according to claim 1 further characterized in that the firebox is provided with a plurality of air vents in said sidewalls adjacent the bottom and spaced around said firebox.
Claim 5
Dependent Claim
46 words
A portable cooking unit according to claim 1 further characterized in that said firebox is double-walled with open topped insulating air spaces separating inner and outer firebox walls, one of said air spaces serving as a storage chamber for said broiler rack when not in use.
Claim 6
Dependent Claim
31 words
A portable cooking unit according to claim 1 further characterized in that an insulated chest is adapted to be fit telescopically within said firebox, said chest having a tight fitting cover.
Claim 7
Dependent Claim
21 words
A portable cooking unit according to claim 1 further characterized in that said nonforaminous heat-conducting metal surface is disposable metal foil.
Claim 8
Dependent Claim
18 words
A portable cooking unit according to claim 6 further characterized in that said metal foil is aluminum foil.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |