US3984219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust purifier-muffler
Assignee: Individual
•
Filing: 1975-12-31
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Granted: 1976-10-05
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Expires: 1995-12-31
Abstract
Abstract Engine Exhaust Purifier-Muffler comprising a box type body, a cylindrical filter connected to the exhaust pipe of engine is located at rear bottom conner inside the box, a plurality of perforated plate filter elements are stepwisely disposed inside the box to reach toward the top, under the ceiling, a filter of square cross section is further provided, after the said filter, an outlet section is provided to connect to an outlet pipe. Porous plastic material such as polyurethane foam is used as filter medium in all the abovesaid filters. Water is half filled within the box. The box is also provided with a water inlet, an overflow opening and a drain for discharge the water. Waste gas passes through water and filter elements discharged from the outlet contains much less hazardous components and is eliminated from noise.
Inventors
- 👤 Ming-Dao Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:39
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; F01N3/021; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
Engine Exhaust Purifier-Muffler comprising a box type body having inlet and outlet and a series of filter elements contained therein and characterized by that a perforated cylindrical filter connected through the inlet to the exhaust pipe of an engine being located at rear bottom corner inside the box, a plurality of perforated plate type filter elements being stepwisely disposed inside the box to reach toward the top, under the ceiling of the box, a perforated filter having square cross section being provided, after the said filter, an partitioned outlet section being provided to connect to the outlet of the box, all the filters being filled with porous plastic material as filter medium, water being half filled within the box.
Claim 2
Dependent Claim
119 words
Engine Exhaust Purifier-Muffler comprising a box type body having inlet and outlet and a series of filter elements contained therein and characterized by that a perforated cylindrical filter connected through the inlet to the exhaust pipe of an engine being located at rear bottom corner inside the box, a plurality of perforated plate type filter elements being stepwisely disposed inside the box to reach toward the top, under the ceiling of the box, a perforated filter having square cross section being provided, after the said filter, an partitioned outlet section being provided to connect to the outlet of the box, all the filters being filled with porous plastic material as filter medium, water being half filled within the box.
Claim 3
Dependent Claim
30 words
Engine exhaust purifier-muffler according to claim 1, the said box is also provided with openings disposed at different levels from top to bottom for charge, overflow and drain of water.
Claim 4
Dependent Claim
51 words
Engine exhaust purifier-muffler according to claim 1, wherein the partitioned outlet section extends after the filter having square cross section under the ceiling of the box, and an angle member is provided at the half way on the partition to prevent the entrainment of water from carrying over to the outlet.
Claim 5
Dependent Claim
42 words
Engine exhaust purifier-muffler according to claim 1 wherein the cylindrical filter having a dual perforated wall, filter medium is filled therebetween inlet pipe connecting the exhaust pipe of the engine having perforated end to stop at half length of the cylindrical filter.
Claim 6
Dependent Claim
19 words
Engine exhaust purifier-muffler according to claim 1, wherein the porous plastic material used as filter medium is polyurethane foam.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |