US3692013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-fired cooking grill
Assignee: Blackhawk Metal Products Inc
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Filing: 1971-06-03
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Granted: 1972-09-19
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Expires: 1991-06-03
Abstract
Abstract A portable gas-fired cooking grill includes a receptacle having an open top and a cover swingably mounted on the receptacle to form a closed housing when the cover is swung to its closed position, the cover being swingable to an open horizontal position wherein the open bottom of the cover faces upwardly alongside the open top of the receptacle. Removable stand means are provided for supporting both the receptacle and the cover in their open condition above a supporting surface. A pair of grills are respectively removably mounted over the open top of the receptacle and the opening in the cover. A gas burner is disposed in the bottom of the receptacle and is supplied with gas from a removable propane tank, which is storable in the cover. A plurality of ceramic briquettes are releasably clamped in a predetermined pattern in the receptacle above the gas burner.
Inventors
- 👤 Jim R Grafton
- 👤 Glenn E Wilkins
- 👤 Joseph F Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:41
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/06; A47J37/07; A47J37/0704; A47J37/0713
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
127 words
A gas-fired cooking unit comprising: a receptacle having an open top; a gas burner means mounted in a lower portion of the receptacle; a first grill mounted in the receptacle above the burner means and substantially spanning the open top of the receptacle; a plurality of non-combustible, heat absorbing and radiating briquettes; and clamping means for removable mounting each briquette to the underside of the grill in a predetermined pattern, each clamping means including horizontal, resilient, finger means spaced from the bottom of the grill and deflectable downwardly to receive a briquette between the finger means and the bottom of the grill, the finger means engaging the bottom of the briquette and exerting an upward force thereon to clamp the briquette to the bottom of the grill.
Claim 2
Dependent Claim
127 words
A gas-fired cooking unit comprising: a receptacle having an open top; a gas burner means mounted in a lower portion of the receptacle; a first grill mounted in the receptacle above the burner means and substantially spanning the open top of the receptacle; a plurality of non-combustible, heat absorbing and radiating briquettes; and clamping means for removable mounting each briquette to the underside of the grill in a predetermined pattern, each clamping means including horizontal, resilient, finger means spaced from the bottom of the grill and deflectable downwardly to receive a briquette between the finger means and the bottom of the grill, the finger means engaging the bottom of the briquette and exerting an upward force thereon to clamp the briquette to the bottom of the grill.
Claim 3
Dependent Claim
47 words
The invention defined in claim 1 wherein the briquettes have generally rectangular horizontal cross sections with convex tops and bottoms, and each finger means includes a pair of generally parallel horizontal fingers engageable with the convex bottom of the briquette adjacent the opposite sides of the briquette.
Claim 4
Dependent Claim
40 words
The invention defined in claim 2 wherein each clamping means includes an inverted U-shaped member having a horizontal bight portion attached to the grill and depending legs, the fingers respectively extending horizontally from the lower ends of the depending legs.
Claim 5
Dependent Claim
43 words
The invention defined in claim 3 wherein the grill is formed of connected parallel wires and the clamping means comprises a formed wire, the bight portion of each clamping means transversely spanning and being attached to at least two wires of the grill.
Claim 6
Dependent Claim
26 words
The invention defined in claim 3 and including a second grill mounted in the receptacle above the first grill for supporting food above the first grill.
Claim 7
Dependent Claim
83 words
The invention defined in claim 2 and including a cover having an open bottom adapted to fit over the open top of the receptacle and hinge means operatively connecting the cover to the receptacle to permit swinging of the cover between a closed position wherein its open bottom mates with the open top of the receptacle to form a substantially closed housing and an open position wherein the open bottom of the cover faces upwardly adjacent to the open top of the receptacle.
Claim 8
Dependent Claim
44 words
The invention defined in claim 6 and including a third grill means removably mounted over the open bottom of the cover and adapted to support food and other objects when the cover is in its open position and to retain objects within the cover.
Claim 9
Dependent Claim
47 words
The invention defined in claim 6 and including a first stand means operatively connected to the receptacle for supporting the receptacle in a horizoNtal condition above a supporting surface and a second stand means operatively connected to the cover for supporting the cover in its open condition.
Claim 10
Dependent Claim
79 words
A gas-fired cooking unit comprising: a receptacle having an open top; a gas burner means mounted in a lower portion of the receptacle; first and second horizontal grills respectively mounted in the receptacle above the gas burner means and substantially spanning the receptacle opening; means for removably interconnecting and spacing the first and second grills; and a plurality of non-combustible, heat absorbing and radiating briquettes disposed between the first and second grills and clamped therebetween in a predetermined pattern.
Claim 11
Dependent Claim
79 words
A gas-fired cooking unit comprising: a receptacle having an open top; a gas burner means mounted in a lower portion of the receptacle; first and second horizontal grills respectively mounted in the receptacle above the gas burner means and substantially spanning the receptacle opening; means for removably interconnecting and spacing the first and second grills; and a plurality of non-combustible, heat absorbing and radiating briquettes disposed between the first and second grills and clamped therebetween in a predetermined pattern.
Claim 12
Dependent Claim
36 words
The invention defined in claim 9 wherein the first and second grills and the briquettes clamped therebetween are removably mounted in the receptacle and reversible to expose alternate sides of the briquettes to the burner means.
Claim 13
Dependent Claim
40 words
The invention defined in claim 10 and including a third grill means mounted in the receptacle adjacent and above the first and second grill means and spanning the open top to support food material above the first and second grills.
Claim 14
Dependent Claim
158 words
A portable, gas-fired cooking grill comprising: a receptacle having an open top; a cover having an open bottom substantially conforming to the open top of the receptacle; hinge means operatively connecting the cover to the receptacle for swinging between a closed position, wherein its open bottom mates with the open top of the receptacle to form a substantially closed housing, and an open position wherein its open bottom faces upwardly adjacent to the open top of the receptacle; a first stand means operatively connected to the receptacle for supporting the receptacle in a horizontal condition above a support surface; a gas burner means disposed in a lower portion of the receptacle; a first grill mounted in the receptacle above the burner means and substantially spanning the open top of the receptacle; a plurality of non-combustible, heat radiating and absorbing briquettes; and means for mounting the briquettes in a predetermined pattern between the first grill and the burner means.
Claim 15
Dependent Claim
158 words
A portable, gas-fired cooking grill comprising: a receptacle having an open top; a cover having an open bottom substantially conforming to the open top of the receptacle; hinge means operatively connecting the cover to the receptacle for swinging between a closed position, wherein its open bottom mates with the open top of the receptacle to form a substantially closed housing, and an open position wherein its open bottom faces upwardly adjacent to the open top of the receptacle; a first stand means operatively connected to the receptacle for supporting the receptacle in a horizontal condition above a support surface; a gas burner means disposed in a lower portion of the receptacle; a first grill mounted in the receptacle above the burner means and substantially spanning the open top of the receptacle; a plurality of non-combustible, heat radiating and absorbing briquettes; and means for mounting the briquettes in a predetermined pattern between the first grill and the burner means.
Claim 16
Dependent Claim
24 words
The invention defined in claim 12 and including a second stand means operatively connected to the cover for supporting it in the open position.
Claim 17
Dependent Claim
22 words
The invention defined in claim 13 wherein the first and second stand means are removably attached to the receptacle and the cover.
Claim 18
Dependent Claim
39 words
The invention defined in claim 12 wherein the receptacle has a generally horizontal bottom with tapered side walls having a plurality of vent holes adjacent to the bottom, the first stand means being removably mounted in said vent holes.
Claim 19
Dependent Claim
142 words
The invention defined in claim 15 wherein the first stand means includes a first pair of connected legs having upper ends engageable with a first pair of vent holes in one side of the receptacle, a second pair of connected legs having their upper ends engageable with a second pair of vent holes in the opposite side of the receptacle, and means swingably interconnecting the first and second pair of legs for swinging between a parallel position wherein the upper ends of the first and second pairs of legs are spaced a greater distance than the distance between the respective holes to permit removal or insertion of the upper end from or into the holes and a traphezoidal position wherein the upper ends are spaced a lesser distance than the distance between the holes and are thereby locked into the respective holes.
Claim 20
Dependent Claim
18 words
The invention defined in claim 12 and including means for removably clamping the briquettes to the first grill.
Claim 21
Dependent Claim
40 words
The invention defined in claim 17 wherein said means for clamping the briquettes to the first grill includes a second grill removably connected to and spaced from the first grill, the briquettes being clamped between said first and second grills.
Claim 22
Dependent Claim
127 words
A portable gas-fired cooking unit comprising: a receptacle having an open top, a bottom, and side walls; a cover having an open bottom confoRming to and mateable with the open top of the receptacle to form a hollow, substantially closed housing; a gas burner means mounted in a lower portion of the receptacle; a flat cooking grill spanning the open top of the receptacle; a pair of flat, parallel perforated retainer members spanning the receptacle below and parallel to the cooking grill and above the gas burner means; a bed of non-combustible, heat-absorbing and radiating elements disposed between the retainer members; clamping means interconnecting the retainer members to clamp said elements therebetween; and a portable gas supply removable connected to the burner means for supplying gas thereto.
Claim 23
Dependent Claim
127 words
A portable gas-fired cooking unit comprising: a receptacle having an open top, a bottom, and side walls; a cover having an open bottom confoRming to and mateable with the open top of the receptacle to form a hollow, substantially closed housing; a gas burner means mounted in a lower portion of the receptacle; a flat cooking grill spanning the open top of the receptacle; a pair of flat, parallel perforated retainer members spanning the receptacle below and parallel to the cooking grill and above the gas burner means; a bed of non-combustible, heat-absorbing and radiating elements disposed between the retainer members; clamping means interconnecting the retainer members to clamp said elements therebetween; and a portable gas supply removable connected to the burner means for supplying gas thereto.
Claim 24
Dependent Claim
136 words
A portable gas-fired cooking unit comprising: a receptacle having an open top, a bottom, and side walls; a cover mateable with the open top of the receptacle to form a hollow, substantially closed housing; a gas burner means above the bottom of the receptacle; a cooking grill spanning the open top of the receptacle above the burner means; a pair of retainer grills removably supported on the side walls parallel to and below the cooking grill and above the burner means; means interconnecting the retainer grills for holding the retained grills a predetermined distance apart; a bed of non-combustible heat-absorbing and radiating elements retained between the retainer grills; aperture means in one of the receptacle walls; and connecting means extending through said aperture means and operative to connect the burner means to a portable propane bottle.
Claim 25
Dependent Claim
136 words
A portable gas-fired cooking unit comprising: a receptacle having an open top, a bottom, and side walls; a cover mateable with the open top of the receptacle to form a hollow, substantially closed housing; a gas burner means above the bottom of the receptacle; a cooking grill spanning the open top of the receptacle above the burner means; a pair of retainer grills removably supported on the side walls parallel to and below the cooking grill and above the burner means; means interconnecting the retainer grills for holding the retained grills a predetermined distance apart; a bed of non-combustible heat-absorbing and radiating elements retained between the retainer grills; aperture means in one of the receptacle walls; and connecting means extending through said aperture means and operative to connect the burner means to a portable propane bottle.
Claim 26
Dependent Claim
33 words
The invention defined in claim 20 wherein the means interconnecting the retainer grills comprises separable clamping means, the bed of non-combustible elements being firmly clamped in a single layer between said retainer grills.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |