Patent US4840030A successfully refreshed from Google Patents.
US4840030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tail pipe structure of control type muffler
Assignee: Marelli Corp
•
Filing: 1988-01-21
•
Granted: 1989-06-20
•
Expires: 2008-01-21
Abstract
Abstract A tail pipe structure of a control type muffler having a first outlet pipe and a second outlet pipe provided with a control valve inserted therein, wherein the first outlet pipe is in communication with the downstream side of the control valve of the second outlet pipe. The mechanism of the muffler is such that when the control valve is opened, the exhaust gases flow into the atmosphere from the first and second outlet pipes. Further, even when the control valve is closed, the exhaust gases in the first outlet pipe flow into the atmosphere therethrough while a part of the exhaust gases flow into the second outlet pipe from the first outlet pipe through the communication pipe and is then discharged into the atmosphere.
Inventors
- 👤 Tsunemi Ikeda
- 👤 Motoki Ota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N1/00; F01N1/16; F01N1/166; F01N2470/00; F01N2470/14; F01N2470/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
An internal combustion engine tail pipe structure for use with a control type muffler having first and second outlet pipes each having an upstream side for receiving exhaust gases from the muffler and a downstream side for discharge of engine exhaust gases, the second outlet pipe having a control valve inserted therein, characterized by conduit means downstream of the control valve for establishing communication between said first and second outlet pipes at a point of connection between the upstream and downstream ends of said first outlet pipe.
Claim 2
Dependent Claim
87 words
An internal combustion engine tail pipe structure for use with a control type muffler having first and second outlet pipes each having an upstream side for receiving exhaust gases from the muffler and a downstream side for discharge of engine exhaust gases, the second outlet pipe having a control valve inserted therein, characterized by conduit means downstream of the control valve for establishing communication between said first and second outlet pipes at a point of connection between the upstream and downstream ends of said first outlet pipe.
Claim 3
Dependent Claim
101 words
A tail pipe structure for use with a control type muffler having first and second outlet pipes each having an upstream side for receiving exhaust gases from the muffler and a downstream side for discharge of engine exhaust gases, the second outlet pipe having a control valve inserted therein, characterized by conduit means downstream of the control valve for establishing communication between said first and second outlet pipes at a point of connection between the upstream and downstream ends of said first outlet pipe, wherein said first and second outlet pipes comprise an orifice therein downstream of said point of connection.
Claim 4
Dependent Claim
101 words
A tail pipe structure for use with a control type muffler having first and second outlet pipes each having an upstream side for receiving exhaust gases from the muffler and a downstream side for discharge of engine exhaust gases, the second outlet pipe having a control valve inserted therein, characterized by conduit means downstream of the control valve for establishing communication between said first and second outlet pipes at a point of connection between the upstream and downstream ends of said first outlet pipe, wherein said first and second outlet pipes comprise an orifice therein downstream of said point of connection.
Claim 5
Dependent Claim
18 words
A tail pipe according to claim 2 wherein said conduit means is provided therein with a second orifice.
Claim 6
Dependent Claim
31 words
A tail pipe structure according to claim 3 wherein the sectional area of the first-said orifice is of the order of 0.5-0.7 times the sectional area of said first outlet pipe.
Claim 7
Dependent Claim
30 words
A tail pipe structure according to one of claims 3 and 4 wherein the sectional area of the first-said orifice is smaller than the sectional area of the second orifice.
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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |