US3914936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas purifying thermal reactor
Assignee: Mazda Motor Corp
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Filing: 1974-04-03
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Granted: 1975-10-28
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Expires: 1994-04-03
Abstract
Abstract A thermal reactor of a three layered type for purifying exhaust gas emitted from an internal combustion engine, which has an inner shell forming a primary reaction chamber therein, an intermediate shell surrounding the inner shell with a secondary reaction chamber formed therebetween and an outer shell or casing surrounding the intermediate shell with an adiabatic space formed between it and the intermediate shell. The inner shell is connected to the intermediate shell at one position intermediate of the length of the inner shell by means of a supporting strip and, similarly, the intermediate shell is connected to the outer shell at one position intermediate of the length of the intermediate shell by means of another supporting strip. Each of these supporting strips is fillet-welded to the adjacent member of these inner, intermediate and outer shells.
Inventors
- 👤 Kingo Okitsu
- 👤 Masashi Shimonaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
357 words
A reactor apparatus for use with an internal combustion engine for purifying the exhaust gases emitted therefrom, said apparatus comprising in combination: a first reaction chamber comprised of a substantially cylindrical inner shell having both ends open; a second reaction chamber comprised of an intermediate sHell enclosing said inner shell, ends closed and fillet welded to said inner shell at a position intermediate to the length of said inner shell; an outer shell completely enclosing said intermediate shell and separated therefrom by an adiabatic space therebetween; at least one pair of guide tubes, each tube having one end operatively connected to the internal combustion engine and the other end extending through said outer shell and said intermediate shell, and into said inner shell, said guide tubes being located on opposite sides of the position at which said inner shell is connected to said intermediate shell and each tube further having in that portion of the tube located in the first reaction chamber an opening in the sidewall thereof opposing the opening in the opposite guide tube; a first supporting strip having both ends fillet welded to the top portion of said intermediate shell, with the intermediate portion thereof connected to said outer shell by a circular welded fillet at the intermediate portion of the length of said intermediate shell, whereby said intermediate shell is held in position within said outer shell; a second supporting strip fillet welded at the intermediate position thereof to the inner shell at a position 180* circumferentially from the position where the inner shell is connected to the intermediate shell and with the ends of said second supporting strip fillet welded to the inside of the intermediate shell in a horizontal plane above the horizontal plane containing the fillet weld connecting the intermediate portion of the strip to the inner shell; at least one exhaust duct having one end open into the second reaction chamber and the other end directed outwardly and passing through the outer shell for discharging the purified exhaust gas from the apparatus; and duct support means in the outer shell for supporting the exhaust duct as it passes therethrough.
Claim 2
Dependent Claim
357 words
A reactor apparatus for use with an internal combustion engine for purifying the exhaust gases emitted therefrom, said apparatus comprising in combination: a first reaction chamber comprised of a substantially cylindrical inner shell having both ends open; a second reaction chamber comprised of an intermediate sHell enclosing said inner shell, ends closed and fillet welded to said inner shell at a position intermediate to the length of said inner shell; an outer shell completely enclosing said intermediate shell and separated therefrom by an adiabatic space therebetween; at least one pair of guide tubes, each tube having one end operatively connected to the internal combustion engine and the other end extending through said outer shell and said intermediate shell, and into said inner shell, said guide tubes being located on opposite sides of the position at which said inner shell is connected to said intermediate shell and each tube further having in that portion of the tube located in the first reaction chamber an opening in the sidewall thereof opposing the opening in the opposite guide tube; a first supporting strip having both ends fillet welded to the top portion of said intermediate shell, with the intermediate portion thereof connected to said outer shell by a circular welded fillet at the intermediate portion of the length of said intermediate shell, whereby said intermediate shell is held in position within said outer shell; a second supporting strip fillet welded at the intermediate position thereof to the inner shell at a position 180* circumferentially from the position where the inner shell is connected to the intermediate shell and with the ends of said second supporting strip fillet welded to the inside of the intermediate shell in a horizontal plane above the horizontal plane containing the fillet weld connecting the intermediate portion of the strip to the inner shell; at least one exhaust duct having one end open into the second reaction chamber and the other end directed outwardly and passing through the outer shell for discharging the purified exhaust gas from the apparatus; and duct support means in the outer shell for supporting the exhaust duct as it passes therethrough.
Claim 3
Dependent Claim
22 words
A reactor apparatus as claimed in claim 1, wherein said adiabatic space between said intermediate and outer shells contains heat insulating material.
Claim 4
Dependent Claim
56 words
A reactor apparatus as claimed in claim 2, further comprising retaining means surrounding the inside portion of the outside shell where the guide tubes and the exhaust duct pass through the outside shell for keeping the insulating material spaced from that portion of the intermediate shell where the guide tube and the exhaust duct pass therethrough.
Claim 5
Dependent Claim
50 words
A reactor apparatus as claimed in claim 1, further comprising an annular coupling member having a channel-shaped cross-section and an annular groove therearound slidably mounted on each of said guide tubes, said groove accommodating therein said intermediate shell at the position where each guide tube passes through the intermediate shell.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |