Patent US1411883A successfully refreshed from Google Patents.
Patent US3670845A successfully refreshed from Google Patents.
US3670845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine mufflers
Assignee: DT PARKS Corp A CORP OF
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Filing: 1970-06-15
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Granted: 1972-06-20
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Expires: 1990-06-15
Abstract
Abstract A muffler for marine engines comprising a shell or body composed of two half sections integrally joined to produce an outer chamber having an inlet and an outlet port, an inner chamber in the shell having a perforated or foraminous cone at one end of said inner chamber, said cone establishing communication between the chambers, the inner chamber having laterally extending ports at its end remote from the cone, said ports communicating with the outer chamber and with the outlet of said outer chamber. The halves of the outer shell can be fitted together in numerous ways to thereby align or disalign the inlet and outlet ports of the shell.
Inventors
- 👤 William M Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:21
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N1/00; F01N1/08; F01N1/083; F01N13/16; F01N13/1888; F01N13/1894; F01N3/00; F01N3/02; F01N3/04; F01N2450/00; F01N2450/28; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
A muffler comprising, an outer shell composed of two half sections attached end-to-end to form a hollow outer shell, one of the sections having an inlet and the other section having an outlet, the sections being rotatably adjustable before their attachment to one another to either axially align or disalign the inlet and outlet, an inner shell section located within and spaced from the outer shell, the inner shell having wall openings communication with the interior of the outer shell, the inner shell having an end opening located adjacent to the inlet of the outer shell, said end opening containing a perforated cone having a larger end facing the inlet and having its smaller end directed into the inner shell.
Claim 2
Dependent Claim
120 words
A muffler comprising, an outer shell composed of two half sections attached end-to-end to form a hollow outer shell, one of the sections having an inlet and the other section having an outlet, the sections being rotatably adjustable before their attachment to one another to either axially align or disalign the inlet and outlet, an inner shell section located within and spaced from the outer shell, the inner shell having wall openings communication with the interior of the outer shell, the inner shell having an end opening located adjacent to the inlet of the outer shell, said end opening containing a perforated cone having a larger end facing the inlet and having its smaller end directed into the inner shell.
Claim 3
Dependent Claim
57 words
A muffler according to claim 1 wherein an end area of the inner shell is provided with its openings directed laterally and communicating with the interior of the outer shell, and the end of the inner shell that is located adjacent to said lateral openings being indented to provide angular exhaust deflecting surfaces adjacent to said openings.
Claim 4
Dependent Claim
112 words
A muffler having a shell constituting an outer chamber, an inner chamber located within the outer chamber, said inner chamber being composed of a pair of frusto-conical sections having their larger ends meeting to co-operate in the formation of a hollow body tapered at its opposite ends, the first of said ends being composed of a foraminous cone having a smaller end directed into the inside of the inner chamber, the outer chamber having an inlet opening, the larger end of the foraminous cone being directed toward said opening, the second end of the inner chamber being closed at its smaller end and being provided with exhaust openings in its side wall.
Claim 5
Dependent Claim
112 words
A muffler having a shell constituting an outer chamber, an inner chamber located within the outer chamber, said inner chamber being composed of a pair of frusto-conical sections having their larger ends meeting to co-operate in the formation of a hollow body tapered at its opposite ends, the first of said ends being composed of a foraminous cone having a smaller end directed into the inside of the inner chamber, the outer chamber having an inlet opening, the larger end of the foraminous cone being directed toward said opening, the second end of the inner chamber being closed at its smaller end and being provided with exhaust openings in its side wall.
Claim 6
Dependent Claim
49 words
A muffler according to claim 3, wherein the closed end wall of the second end of the inner chamber is indented to form a pair of deflecting surfaces arranged angularly to deflect exhaust vapors toward the openings in the side wall of the second end of the inner chamber.
Claim 7
Dependent Claim
108 words
A muffler having a shell defining an outer hollow chamber provided with inlet and outlet openings, an inner chamber located within the outer chamber, said inner chamber being composed of a pair of frusto-conical sections meeting at their larger ends so that the frusto-conical sections have their smaller ends respectively directed toward the inlet and outlet openings in the outer shell, one of the frusto-conical sections having a foraminous end wall composed of a perforated cone which has a small end directed away from the small end of the frusto-conical section to which it is attached, the second frusto-conical section having outlet openings in its side wall only.
Claim 8
Dependent Claim
108 words
A muffler having a shell defining an outer hollow chamber provided with inlet and outlet openings, an inner chamber located within the outer chamber, said inner chamber being composed of a pair of frusto-conical sections meeting at their larger ends so that the frusto-conical sections have their smaller ends respectively directed toward the inlet and outlet openings in the outer shell, one of the frusto-conical sections having a foraminous end wall composed of a perforated cone which has a small end directed away from the small end of the frusto-conical section to which it is attached, the second frusto-conical section having outlet openings in its side wall only.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |