US3857669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic heater head
Assignee: Impala Industries Inc
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Filing: 1971-09-02
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Granted: 1974-12-31
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Expires: 1991-09-02
Abstract
Abstract A catalytic heater head having a back pan forming a gas diffusion chamber behind a layer of catalytic mass; the back pan being rectangular shape with a central gas receiving port and a plurality of channels radiating outwardly therefrom to reservoirs located in the four corners of the pan.
Inventors
- 👤 J Smith
- 👤 R Schantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:27
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D14/18; F23D14/181
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
A catalytic heater head for use with gaseous fuels, comprising: a gas impervious rectangular back pan shaped to define a shallow gas diffusion chamber with an open front side; a fibrous layer of catalytic-coated mass mounted on the front side of said back pan; a gas emitter head centrally located in said back pan and including at least one orifice located to emit gas in a directed stream; means to supply gas to said emitter head; and said back pan being formed with separate reservoirs in each of the four corners thereof and channel means radiating outward from the gas emitter head terminating in at least one of the reservoirs, the volume of the channel means being substantially smaller than the volume of the reservoirs, the channel means being substantially aligned with the gas stream from the emitter head whereby the flowing gas is partially confined as it travels upward through the channel means into the respective reservoir and ridge means separating each of the reservoirs partially restricting the flow of gas between the reservoirs.
Claim 2
Dependent Claim
175 words
A catalytic heater head for use with gaseous fuels, comprising: a gas impervious rectangular back pan shaped to define a shallow gas diffusion chamber with an open front side; a fibrous layer of catalytic-coated mass mounted on the front side of said back pan; a gas emitter head centrally located in said back pan and including at least one orifice located to emit gas in a directed stream; means to supply gas to said emitter head; and said back pan being formed with separate reservoirs in each of the four corners thereof and channel means radiating outward from the gas emitter head terminating in at least one of the reservoirs, the volume of the channel means being substantially smaller than the volume of the reservoirs, the channel means being substantially aligned with the gas stream from the emitter head whereby the flowing gas is partially confined as it travels upward through the channel means into the respective reservoir and ridge means separating each of the reservoirs partially restricting the flow of gas between the reservoirs.
Claim 3
Dependent Claim
46 words
Apparatus according to claim 1, wherein the channel means includes a pair of channels each extending into a separate reservoir at an upper corner of the back pan, and the emitter head includes two orifices each directing a gas stream into one of the said channels.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 1, wherein the back pan is formed to include a recessed center area surrounding the gas emitter head into which the channel means terminate.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 1, wherein the reservoirs decrease in depth as they extend away from the corners of the back pan.
Claim 6
Dependent Claim
30 words
Apparatus according to claim 1, wherein the reservoirs decrease in depth as they extend away from the corners of the back pan terminating in said ridges which separate each reservoir.
Claim 7
Dependent Claim
80 words
Apparatus according to claim 1, wherein the channel means includes a pair of channels each extending into a separate reservoir at an upper corner of the back pan, and the emitter head includes two orifices each directing a gas stream into one of the said channels, and a ridged layer of pervious material sandwiched between the layers of catalytic mass and the back pan to prevent the catalytic mass from deforming into the reservoirs and channels of the back pan.
Claim 8
Dependent Claim
93 words
Apparatus according to claim 1, wherein the channel means includes a pair of channels each extending into a separate reservoir at an upper corner of the back pan, and the emitter head includes two orifices each directing a gas stream into one of the said channels, and a filter pad of ceramic fibrous material positioned under the layer of catalytic mass and a rigid layer of pervious material sandwiched between the filter pad and the back pan to prevent the fibrous layers from deforming in the reservoirs and channels of the back pan.
Claim 9
Dependent Claim
54 words
Apparatus according to claim 1, wherein the channel means includes separate channels to each of the four reservoirs, the emitter heads including two primary orifices and two secondary orifices, the primary orifices each directing a gas stream downward into the two lower reservoirs while the secondary orifices are directed to the upper two reservoirs.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |