US3868943A — Portable forced draft solid fuel burning cooker

Claim 1

Independent Claim 373 words

A portable forced draft solid fuel burning cooker that may be selectively disposed in either a first compact position for ease of transportation or in a second position in which said cooker is capable of supporting and heating a cooking utensil, which cooker includes: a. a metallic heater assembly that includes a first outer cup shaped shell, a second inner cup shaped shell in which the solid fuel is disposed when the cooker is in said second position, a ring that joins free peripheral edges of said first and second shells, said second shell of substantially less transverse area than said first shell and said first and second shell cooperating with said ring to define a confined space of which a portion is of annulus shape, a third cup shaped shell interposed in a fixed position between said first and second shells that subdivides said confined space into inner and outer passages in which air is preheated by the combustion of said fuel after said air enters a first opening in said first shell in the portion thereof most remote from said ring to flow through said first and second passages and discharge from a plurality of spaced second openings in said second shell transversely across said fuel to support the combustion of the latter, and first means for supporting said third cup shaped shell in said fixed position; b. a blower assembly that removably supports said heater assembly thereon when said cooker is in said second position, said blower assembly including a base of greater area than the transverse interior area of said second shell, electrically operated blower means mounted on said base for discharging a current of air through said first opening to flow through said first and second passages, said electrically operated blower means of such size as to be disposed within said second shell when the latter is free of fuel and said cooker occupies said first position with said base supported by said ring; c. engaging means on said ring; and d. engageable means on said base that removably engage said engaging means when said cooker is in said first position to hold said heater assembly and blower assembly together as an integral unit for ease of transportation.

Claim 2

Dependent Claim 373 words

A portable forced draft solid fuel burning cooker that may be selectively disposed in either a first compact position for ease of transportation or in a second position in which said cooker is capable of supporting and heating a cooking utensil, which cooker includes: a. a metallic heater assembly that includes a first outer cup shaped shell, a second inner cup shaped shell in which the solid fuel is disposed when the cooker is in said second position, a ring that joins free peripheral edges of said first and second shells, said second shell of substantially less transverse area than said first shell and said first and second shell cooperating with said ring to define a confined space of which a portion is of annulus shape, a third cup shaped shell interposed in a fixed position between said first and second shells that subdivides said confined space into inner and outer passages in which air is preheated by the combustion of said fuel after said air enters a first opening in said first shell in the portion thereof most remote from said ring to flow through said first and second passages and discharge from a plurality of spaced second openings in said second shell transversely across said fuel to support the combustion of the latter, and first means for supporting said third cup shaped shell in said fixed position; b. a blower assembly that removably supports said heater assembly thereon when said cooker is in said second position, said blower assembly including a base of greater area than the transverse interior area of said second shell, electrically operated blower means mounted on said base for discharging a current of air through said first opening to flow through said first and second passages, said electrically operated blower means of such size as to be disposed within said second shell when the latter is free of fuel and said cooker occupies said first position with said base supported by said ring; c. engaging means on said ring; and d. engageable means on said base that removably engage said engaging means when said cooker is in said first position to hold said heater assembly and blower assembly together as an integral unit for ease of transportation.

Claim 3

Dependent Claim 71 words

A cooker as defined in claim 1 in which said engaging means are a plurality of circumferentially spaced clips secured to said ring and extending outwardly therefrom and said engageable means are a plurality of spaced members that occupy fixed positions relative to said base and removably engage said clips when said heater assembly and blower assembly are rotated relative to one another when said cooker is in said first position.

Claim 4

Dependent Claim 27 words

A cooker as defined in claim 2 in which said base is substantially square and said members are angularly disposed, out turned corner portions of said base.

Claim 5

Dependent Claim 47 words

A cooker as defined in claim 1 which in addition includes: e. a plurality of circumferentially spaced tabs that extend outwardly from said third shell and are secured to said first shell to hold said third shell in a fixed position between said first and second shells.

Claim 6

Dependent Claim 97 words

A cooker as defined in claim 1 in which said blower assembly includes: e. two laterally spaced walls that extend from said base and are rigidly secured thereto; f. a ring shaped plate parallel to said base; g. a plurality of circumferentially spaced pins that secure said plate to said walls and project outwardly therefrom in a direction away from said base, said pins so spaced as to removably engage said first opening to prevent said heater assembly being inadvertently slid laterally to be displaced from said blower assembly when said cooker is in said second posItion.

Claim 7

Dependent Claim 113 words

A cooker as defined in claim 5 in which said blower means includes: h. an electric motor mounted on said base; i. a fan driven by said motor and adjacently disposed to a third opening defined in said plate, said fan being adjacently disposed to said first opening when said cooker is in said second position; j. a battery removably supported between said walls; k. a manually operated electric switch that occupies a fixed position relative to said base and walls; and l. electrical conducting means that connect said switch and battery to said electric motor to energize the latter when said switch is closed and said cooker is in said second position.

Claim 8

Dependent Claim 38 words

A cooker as defined in claim 1 in which said engaging means are a plurality of circumferentially spaced clips secured to the interior surface of said first shell and the exterior surface of said third cup shaped shell.

Claim 9

Dependent Claim 167 words

A cooker as defined in claim 7 in which said engaging means are a plurality of circumferentially spced L-shaped clips that project downwardly below said third cup shaped shell and abut against the portion of said first shell adjacent said first opening therein, and a plurality of screws that extend through said clips and first shell to project downwardly below the latter, with said blower assembly including: e. two laterally spaced walls that extend from said base and are rigidlly secured thereto; f. a ring shaped plate parallel to said base and secured to the portions of said walls most remote from said base, said ring shaped plate having a third opening in the center thereof and an outer periphery, with said first and third openings being vertically aligned when said cooker is in said second position, and said projecting portions of said screws adjacently disposed to said periphery of said ring shaped plate to prevent said heater assembly being inadvertently slid laterally from said blower assembly.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-03-03	1978-09-02	1979-03-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-03-03	1982-09-02	1983-03-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-03-03	1986-09-02	1987-03-04	$7700.00	Window Closed / Lapsed

Portable forced draft solid fuel burning cooker

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag