Patent US3779342A successfully refreshed from Google Patents.
US3779342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine noise depressing assemblies
Assignee: Individual
•
Filing: 1972-10-26
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Granted: 1973-12-18
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Expires: 1992-10-26
Abstract
Abstract Noise depressing devices are provided for use in conjunction with engines of the type commonly used to power model aircraft, boats, cars and the like. The noise depressing devices include: (1) an elongated extension sleeve that is secured to and aligns at one of its ends with the exhaust port of an engine and (2) a plurality of spaced baffle plates secured to the opposite end of the sleeve that are designed to quietly diffuse the exhaust gases into the atmosphere.
Inventors
- 👤 D Broberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:20
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; F01N1/00; F01N1/08; F02; F02B; F02B75/00; F02B75/34; F02B9/00; F02B9/06; F01N2450/00; F01N2450/24; Y; Y10; Y10S; Y10S181/00; Y10S181/404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
219 words
A universally adaptable noise depressing device for a combustion engine, adaptable for use with differently sized engines having varying engine displacement and exhaust port characteristics comprising: a tubular sleeve means secured to said engine and aligned at one end with the exhaust port thereof for defining an extended chamber for receiving exhaust gases emitted from said engine; a plurality of spaced baffle plates removably secured to the opposite end of said tubular sleeve means which define a plurality of openings through which exhaust gases emitted from said engine are diffused in a stage-wise fashion into the atmosphere, said baffle plates having a plurality of registered openings formed therein to successively transmit said exhaust gases and said plates being successively arranged in a series transversely to said tubular sleeve means; means for removably securing said baffle plates to said tubular sleeve so that varying numbers of said plates can be arranged in said series; spacing means disposed between adjacent baffle plates to maintain said plates in a spaced relationship with respect to each other and to separate each of said plates a predetermined distance from each succeeding plate; and an alignment adaptor means disposed between and extending within said tubular sleeve means and said engine exhaust port to maintain said port and said sleeve means in an aligned, sealed relationship.
Claim 2
Dependent Claim
219 words
A universally adaptable noise depressing device for a combustion engine, adaptable for use with differently sized engines having varying engine displacement and exhaust port characteristics comprising: a tubular sleeve means secured to said engine and aligned at one end with the exhaust port thereof for defining an extended chamber for receiving exhaust gases emitted from said engine; a plurality of spaced baffle plates removably secured to the opposite end of said tubular sleeve means which define a plurality of openings through which exhaust gases emitted from said engine are diffused in a stage-wise fashion into the atmosphere, said baffle plates having a plurality of registered openings formed therein to successively transmit said exhaust gases and said plates being successively arranged in a series transversely to said tubular sleeve means; means for removably securing said baffle plates to said tubular sleeve so that varying numbers of said plates can be arranged in said series; spacing means disposed between adjacent baffle plates to maintain said plates in a spaced relationship with respect to each other and to separate each of said plates a predetermined distance from each succeeding plate; and an alignment adaptor means disposed between and extending within said tubular sleeve means and said engine exhaust port to maintain said port and said sleeve means in an aligned, sealed relationship.
Claim 3
Dependent Claim
39 words
The noise depressing device of claim 1 wherein said baffle plates are maintained in a spaced position relative to one another and wherein the distance between each adjacent plate is in the range of about .005 to .010 inch.
Claim 4
Dependent Claim
14 words
The noise depressing device of claim 2 wherein said spacing means are spacing washers.
Claim 5
Dependent Claim
33 words
The noise depressing device of claim 1 wherein said tubular sleeve means is constructed from a material that is relatively more heat expandable than the material from which said baffle plates are constructed.
Claim 6
Dependent Claim
23 words
The noise depressing device of claim 1 which is further characterized by including means for securing said tubular sleeve means to said engine.
Claim 7
Dependent Claim
39 words
The noise depressing device of claim 5 wherein said means for securing said tubular sleeve means to said engine is a clamp band which surrounds said engine and is secured at its opposite ends to said tubular sleeve means.
Claim 8
Dependent Claim
42 words
The noise depressing device of claim 1 wherein said alignment adaptor means is a cross-shaped key having four oppositely disposed edges, one of said edges fitting within said exhaust port and an opposite of said edges fitting within said tubular sleeve means.
Claim 9
Dependent Claim
27 words
The noise depressing device of claim 7 wherein the edge of said cross-shaped key fitting within said exhaust port is adjustable to differently sized exhaust port openings.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |