US3958660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler system
Assignee: Individual
•
Filing: 1975-01-22
•
Granted: 1976-05-25
•
Expires: 1995-01-22
Abstract
Abstract A muffler system having the advantages of a straight pipe yet with sound abatement qualities comparable to those of a conventional muffler is provided. A substantially hollow elongated shell forms the body of the muffler and is provided with an inlet port at one end disposed in offset relationship to an outlet port at the opposite end. An exhaust pipe which is coupled with the engine extends into the hollow shell through the inlet port and terminates at a point interiorly of the hollow shell in a bevel end. The longest side of the bevel end is turned down into a gas dispersing finger point and is provided with a straight slot while the shorter side of the exhaust pipe is provided with a tapered slot extending longitudinally toward the end of the muffler so as to further facilitate dissipation of the gases. A similarly constructed outlet pipe extends into the hollow shell of the muffler through the outlet port. The outlet pipe is also provided with a bevel end having a finger projection extending downwardly from the tip of the end into the gas stream. The outlet pipe also has opposed coplanar elongated slots extending toward the outlet end of the hollow shell. In a modified form of the invention a partition disposed within the hollow shell divides the latter into a plurality of muffling chambers, with one chamber directly behind the other.
Inventors
- 👤 Elijah M. Boor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:11
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
241 words
A muffler for an internal combustion engine, said muffler comprising: an elongated hollow shell having an inlet port at one end and an outlet port at the opposite end; an exhaust pipe coupled with said engine and extending into said shell through said inlet port, said exhaust pipe terminating away from said one end in a bevel end presenting a longest side and a shortest side of said pipe, said exhaust pipe having a first slot therein extending from said bevel end along said shortest side in the direction of said one end of the shell, said first slot being of tapered configuration as it extends toward said one shell end and terminating in a smoothly curved end toward said one shell end, said exhaust pipe having a second slot therein extending from said bevel end along said longest side in the direction of said one end of the shell, said second slot being greater in length than said first slot and terminating more closely to said one shell end than the end of said shortest side, the ends of said first and second slots toward said one shell end being staggered longitudinally of the pipe; and a short finger projection rigid with said exhaust pipe and extending from the longest side thereof toward an imaginary extension of said first slot, said finger projection terminating in a tip that would be located within an imaginary longitudinal extension of said exhaust pipe.
Claim 2
Dependent Claim
241 words
A muffler for an internal combustion engine, said muffler comprising: an elongated hollow shell having an inlet port at one end and an outlet port at the opposite end; an exhaust pipe coupled with said engine and extending into said shell through said inlet port, said exhaust pipe terminating away from said one end in a bevel end presenting a longest side and a shortest side of said pipe, said exhaust pipe having a first slot therein extending from said bevel end along said shortest side in the direction of said one end of the shell, said first slot being of tapered configuration as it extends toward said one shell end and terminating in a smoothly curved end toward said one shell end, said exhaust pipe having a second slot therein extending from said bevel end along said longest side in the direction of said one end of the shell, said second slot being greater in length than said first slot and terminating more closely to said one shell end than the end of said shortest side, the ends of said first and second slots toward said one shell end being staggered longitudinally of the pipe; and a short finger projection rigid with said exhaust pipe and extending from the longest side thereof toward an imaginary extension of said first slot, said finger projection terminating in a tip that would be located within an imaginary longitudinal extension of said exhaust pipe.
Claim 3
Dependent Claim
76 words
The invention of claim 1, wherein is included an outlet pipe extending into said shell through said outlet port, said outlet pipe terminating away from said opposite end in a bevel end presenting a longest side and a shortest side of the outlet pipe, said outlet pipe further having a first slot therein extending from said bevel end along said shortest side of the outlet pipe in the direction of said opposite end of the shell.
Claim 4
Dependent Claim
47 words
The invention of claim 2 wherein a second slot is presented in said longest side of the outlet pipe extending from said bevel end in the direction of said opposite end of said shell and in opposed coplanar relationship to the first slot of said outlet pipe.
Claim 5
Dependent Claim
36 words
The invention of claim 2, wherein said inlet port is disposed to one side of the center of said shell and said outlet port is disposed to the opposite side of the center of the shell.
Claim 6
Dependent Claim
38 words
The invention of claim 4, wherein the longest sides of said exhaust pipe and said outlet pipe are adjacent the walls of said shell thereby placing said first slots of the outlet and exhaust pipes in facing relationship.
Claim 7
Dependent Claim
58 words
The invention of claim 5, wherein is included a short finger projection rigid with said outlet pipe and extending from the longest side thereof toward an imaginary extension of the outlet pipe first slot, the finger projection of said outlet pipe terminating in a tip that would be located within an imaginary longitudinal extension of said outlet pipe.
Claim 8
Dependent Claim
105 words
The invention of claim 1, wherein is included partition means extending across said shell intermediate the inlet and outlet ports, tubular means extending through said partition means and presenting an extension into the interior of said shell on the inlet side of said partition means, said extension terminating in a first bevel end presenting a first longest side and a first shortest side of said extension, both of said sides extending from one side of said partition means, said extension having a first slot therein extending from said first bevel end along said shortest side of the extension in the direction of said partition means.
Claim 9
Dependent Claim
66 words
The invention of claim 7, wherein said extension terminates in a second bevel end presenting a second longest side and a second shortest side of said extension, both of said second sides extending from the other side of said partition means, said extension having a second slot therein extending from said second bevel end along said second shortest side in the direction of said partition means.
Claim 10
Dependent Claim
33 words
The invention of claim 8, wherein each of said first and second longest sides presents an additional slot in opposed coplanar relationship to each of said first and second slots of said extension.
Claim 11
Dependent Claim
25 words
The invention of claim 8, wherein said tubular means extending through said partition means is disposed in axial alignment with the center of said shell.
References Cited (Backward Citations)
GB465858A
Cited
US2205024A
Cited
US2516948A
Cited
US2958390A
Cited
US3080939A
Cited
US3317001A
Cited
US3480105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |