US3999967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for purifying exhaust gas
Assignee: Individual
•
Filing: 1975-05-07
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Granted: 1976-12-28
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Expires: 1995-05-07
Abstract
Abstract An apparatus for purifying exhaust gas having an exhaust gas purifier and a recovering pipe extending from the exhaust gas purifier to a suction device of an internal-combustion engine. The exhaust gas purifier collects soot, etc., in the exhaust gas to purify the exhaust gas under an action of adiabatic expansion, which exhaust gas is discharged from the engine. The recovering pipe feeds the soot, etc., with the gas purified by the exhaust gas purifier into the suction device in which the soot, etc., and the purified gas are mixed into fresh air for combustion.
Inventors
- 👤 Katashi Aoi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:37
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/038; F02; F02M; F02M26/00; F02M26/13; F02M26/14; F02M26/15; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A purifier for purifying exhaust gas discharged from an internal combustion engine, comprising: a purifying cylinder; a chamber in said purifying cylinder for pretreating the exhaust gas provided at the upstream most end of the purifying cylinder; an exhaust pipe communicated with the inner part of the pretreating chamber; a chamber in said purifying cylinder for adiabatically expanding the exhaust gas pretreated in the pretreating chamber, said chamber being located immediately downstream of the pretreating chamber; adiabatic plate means in said purifying cylinder between the pretreating chamber and the expanding chamber across the flow path, said adiabatic plate means having a number of openings; means for varying the total area of said openings automatically in response to the pressure of the exhaust gas; means in said purifying cylinder for trapping droplets formed by the adiabatic expansion in the expanding chamber; and an outlet on said purifying cylinder for exhausting the treated gas at the downstream most end of said purifying cylinder.
Claim 2
Dependent Claim
161 words
A purifier for purifying exhaust gas discharged from an internal combustion engine, comprising: a purifying cylinder; a chamber in said purifying cylinder for pretreating the exhaust gas provided at the upstream most end of the purifying cylinder; an exhaust pipe communicated with the inner part of the pretreating chamber; a chamber in said purifying cylinder for adiabatically expanding the exhaust gas pretreated in the pretreating chamber, said chamber being located immediately downstream of the pretreating chamber; adiabatic plate means in said purifying cylinder between the pretreating chamber and the expanding chamber across the flow path, said adiabatic plate means having a number of openings; means for varying the total area of said openings automatically in response to the pressure of the exhaust gas; means in said purifying cylinder for trapping droplets formed by the adiabatic expansion in the expanding chamber; and an outlet on said purifying cylinder for exhausting the treated gas at the downstream most end of said purifying cylinder.
Claim 3
Dependent Claim
42 words
A purifier as defined in claim 1, including resilient biasing means mounted on the cylindrical casing at its one end, the other end being mounted on the movable section, said means controlling the movement of the movable section against the gas pressures.
Claim 4
Dependent Claim
44 words
A purifier as defined in claim 1 wherein said adiabatic means includes: a stationary section mounted on a cylindrical casing; and a movable section covering a downstream portion of the stationary section and mounted for moving thereon in the longitudinal direction of the cylinder.
Claim 5
Dependent Claim
117 words
A purifier as defined in claim 3, wherein both said sections comprise cylindrical portions and transverse portions extending across the cylindrical portions at the downstream end thereof, each transverse portion being formed with a plurality of openings, the openings in the transverse portion of the stationary section being larger than the openings in the transverse portion of the movable section, the cylindrical portions having openings therein of the same dimensions, whereby the movable section is displaced in operation in accordance with the gas pressure acting thereon and determines thereby the extent of overlap of the openings in the cylindrical sections and hence the total area of through-openings available to exhaust gas for adiabatic expansion of exhaust gas.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |