Patent US3815338A successfully refreshed from Google Patents.
US3815338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system
Assignee: Ethyl Corp
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Filing: 1973-03-20
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Granted: 1974-06-11
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Expires: 1993-03-20
Abstract
Abstract Disclosed herein is a system for removing particulates from engine exhaust comprising an inertial particulate trap having a cylindrical cyclone chamber with a non-perforate bottom, slots in the side wall proximate to the bottom, a guide vane in the inlet compartment forming a generally circular tunnel leading to the entrance of the cyclone chamber and a pervious exhaust conditioning material (e.g., expanded metal lath) in the tunnel. Also disclosed is an exhaust gas filter used in combination with the trap.
Inventors
- 👤 D Lenane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:28
CPC Classifications
B; B04; B04C; B04C9/00; F; F01; F01N; F01N13/00; F01N13/009; F01N13/011; F01N3/00; F01N3/02; F01N3/021; F01N3/033; F01N3/0335; F01N3/037; B04C2009/002; F01N13/08; F01N13/10; F01N13/107; F01N2250/00; F01N2250/08; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/102; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
200 words
A particulate trap for removing particulate matter from the exhaust gas of an internal combustion engine, said trap comprising a side wall and end closures forming a trap housing, a transverse partition member in said housing dividing said housing into an inlet compartment and a trap compartment, a cylindrical cyclone housing closed at one end located within said trap compartment and having its open end sealably attached to said partition member and having slots around the circumference of said cyclone housing, said slots being proximate to but not abutting said closed end, said partition member having a circular opening within the confines of said cylindrical cyclone housing connecting said inlet compartment with the inside of said cyclone housing, an exit tube extending through the end closure of said trap housing through said inlet compartment and axially into said cyclone housing, an inlet port into said inlet compartment adapted to connect to an engine exhaust system, a generally circular vane member within said inlet compartment forming a generally circular flow tunnel leading from said inlet port to said circular opening in said partition and wherein said tunnel contains a pervious exhaust gas conditioning material having a high surface to volume ratio.
Claim 2
Dependent Claim
200 words
A particulate trap for removing particulate matter from the exhaust gas of an internal combustion engine, said trap comprising a side wall and end closures forming a trap housing, a transverse partition member in said housing dividing said housing into an inlet compartment and a trap compartment, a cylindrical cyclone housing closed at one end located within said trap compartment and having its open end sealably attached to said partition member and having slots around the circumference of said cyclone housing, said slots being proximate to but not abutting said closed end, said partition member having a circular opening within the confines of said cylindrical cyclone housing connecting said inlet compartment with the inside of said cyclone housing, an exit tube extending through the end closure of said trap housing through said inlet compartment and axially into said cyclone housing, an inlet port into said inlet compartment adapted to connect to an engine exhaust system, a generally circular vane member within said inlet compartment forming a generally circular flow tunnel leading from said inlet port to said circular opening in said partition and wherein said tunnel contains a pervious exhaust gas conditioning material having a high surface to volume ratio.
Claim 3
Dependent Claim
28 words
An exhaust system for an internal combustion engine, said system comprising a particulate trap of claim 1 operatively connected to the exhaust outlet of said internal combustion engine.
Claim 4
Dependent Claim
25 words
A particulate trap of claim 1 wherein said exhaust conditioning material is a pervious mass of metal bodies having a high surface to volume ratio.
Claim 5
Dependent Claim
14 words
A particulate trap of claim 3 wherein said conditioning material is expanded sheet metal.
Claim 6
Dependent Claim
19 words
A particulate trap of claim 3 wherein said inlet port into said inlet compartment is a tangential inlet port.
Claim 7
Dependent Claim
15 words
A particulate trap of claim 5 wherein said exhaust conditioning material is expanded sheet metal.
Claim 8
Dependent Claim
102 words
An exhaust system for an internal combustion engine, said system comprising a particulate trap of claim 1 and an exhaust gas filter, said inlet port of said particulate trap being operatively connected to the exhaust outlet of said engine, said exit tube being operatively connected to the inlet of said exhaust gas filter, said exhaust gas filter comprising a filter housing formed by a side wall and end closures, an inlet to and outlet from said filter housing, and a filter element disposed within said filter housing such that exhaust passing from said inlet to said outlet passes through said filter element.
Claim 9
Dependent Claim
16 words
An exhaust system of claim 7 wherein said filter element is a non-woven poly(m-phenylene-isophthalamide) fiber mat.
Claim 10
Dependent Claim
16 words
An exhaust system of claim 7 wherein said filter element is a non-woven glass fiber mat.
Claim 11
Dependent Claim
14 words
An exhaust system of claim 7 wherein said filter element is a glass paper.
Claim 12
Dependent Claim
76 words
An exhaust system of claim 7 wherein said exhaust gas filter comprises a filter housing formed by a side wall and end closures, a centrally located exhaust tube extending longitudinally through said filter housing and out through one of said end closures, said exhaust tube being closed at the end within said filter housing and having perforations in the side wall within said filter housing, and a cylindrical pleated filter element fitted around said exhaust tube.
Claim 13
Dependent Claim
38 words
An exhaust system of claim 10 wherein said inlet to said filter housing is a tangential inlet in said side wAll of said filter housing proximate to the end closure not having said exhaust tube extending through it.
Claim 14
Dependent Claim
16 words
An exhaust system of claim 10 wherein said filter element is a non-woven poly(m-phenylene-isophthalamide) fiber mat.
Claim 15
Dependent Claim
15 words
An exhaust system of claim 10 wherein said filter element is a glass fiber mat.
Claim 16
Dependent Claim
13 words
An exhaust system of claim 10 wherein said filter element is glass paper.
References Cited (Backward Citations)
US3162518A
Cited
US3688476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |