US3754619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low backpressure straight through muffler
Assignee: Tenneco Inc
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Filing: 1971-06-11
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Granted: 1973-08-28
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Expires: 1991-06-11
Abstract
Abstract A low backpressure, straight through type sound attenuating muffler, adapted particularly for use with internal combustion engines, comprises a series of spaced annular bodies of sound deadening material, the inner diameters of which define a gas flow path and the side faces of which define chambers within the muffler housing.
Inventors
- 👤 Cormick J Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:10
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/003; F01N1/006; F01N1/02; F01N1/023; F01N1/04; F01N2490/00; F01N2490/15; F01N2490/155; Y; Y10; Y10S; Y10S55/00; Y10S55/21; Y10S55/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, perforated tube means in said central apertures defining a gas flow path through the bodies, said gas flow path passing through and communicating with said transverse chambers and with the bodies, transverse partition means in said space and engaging said shell and having central apertures in line with said gas flow path, said partition means defining said transverse chambers, said partition means comprising a plurality of transverse partitions, one of said partitions being longitudinally spaced from said bodies and being imperforate.
Claim 2
Dependent Claim
164 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, perforated tube means in said central apertures defining a gas flow path through the bodies, said gas flow path passing through and communicating with said transverse chambers and with the bodies, transverse partition means in said space and engaging said shell and having central apertures in line with said gas flow path, said partition means defining said transverse chambers, said partition means comprising a plurality of transverse partitions, one of said partitions being longitudinally spaced from said bodies and being imperforate.
Claim 3
Dependent Claim
40 words
The invention as set forth in claim 1 wherein a second transverse partition acts with said one imperforate partition to define a transverse chamber, said second transverse partition being perforate and defining a longitudinal face of one of said bodies.
Claim 4
Dependent Claim
58 words
The invention as set forth in claim 1 wherein said bodies each comprise a subassembly of a pair of axially spaced annular transverse partitions and a tube secured to each of said partitions and forming a part of said gas flow path, the space between said partitions and around the tube being filled with said sound absorbing material.
Claim 5
Dependent Claim
155 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, means including said central apertures forming a gas flow path passing through and communicating with said transverse chambers and with the bodies, said bodies each comprising a subassembly of a pair of axially spaced annular transverse partitions and a perforated tube affixed to each of said partitions and forming a part of said gas flow path, the space between said partitions and around the tube being filled with said sound absorbing material.
Claim 6
Dependent Claim
155 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, means including said central apertures forming a gas flow path passing through and communicating with said transverse chambers and with the bodies, said bodies each comprising a subassembly of a pair of axially spaced annular transverse partitions and a perforated tube affixed to each of said partitions and forming a part of said gas flow path, the space between said partitions and around the tube being filled with said sound absorbing material.
Claim 7
Dependent Claim
162 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, perforated tube means in said central apertures defining a gas flow path through the bodies, said gas flow path passing through and communicating with said tRansverse chambers and with the bodies, transverse partitions in said space and engaging said shell and having central apertures in line with said gas flow path, said partitions defining said transverse chambers, said partitions and bodies being located to provide empty transverse chambers at the inlet and outlet ends of the gas flow path.
Claim 8
Dependent Claim
162 words
In a muffler for attenuating sound in flowing gas, a shell providing an elongated inner space having a longitudinal axis and having an inlet means for the space at one end and an outlet means for the space at the other end, a plurality of sound absorbing bodies in said space and extending transversely across said space having registering central apertures, said bodies being longitudinally separated to define empty transverse chambers in said space extending across substantially the full width of the space, perforated tube means in said central apertures defining a gas flow path through the bodies, said gas flow path passing through and communicating with said tRansverse chambers and with the bodies, transverse partitions in said space and engaging said shell and having central apertures in line with said gas flow path, said partitions defining said transverse chambers, said partitions and bodies being located to provide empty transverse chambers at the inlet and outlet ends of the gas flow path.
Claim 9
Dependent Claim
33 words
A muffler as set forth in claim 5 wherein one of said bodies is located longitudinally adjacent each end chamber and there is a perforated partition separating each said end chamber and body.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |