Patent US4487288A successfully refreshed from Google Patents.
US4487288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffler device of motorcycle
Assignee: Kawasaki Motors Ltd
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Filing: 1982-06-28
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Granted: 1984-12-11
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Expires: 2002-06-28
Abstract
Abstract A muffler device of a motorcycle including a muffler body for silencing the noise of exhausts of an engine located below the engine and connected to exhaust pipes which in turn are each connected to one of cylinders of the engine. Discharge pipes are connected to the muffler body to discharge the exhausts from the muffler body rearwardly of a motorcycle body.
Inventors
- 👤 Jun-ichi Watanabe
- 👤 Takahiko Aoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:56
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/084
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A muffler device of a motorcycle having a front and a rear wheel comprising: a single muffler body for silencing the exhaust noise of a multicylinder engine, said muffler body being located beneath said engine, said entire muffler body curving and projecting upwardly forward of the lower front portion of the engine; a plurality of exhaust pipes each of which is connected proximately at one end thereof to said muffler body and each of which is connected at the other end thereof to respective cylinders of the engine; discharge pipes connected to said muffler body to discharge the exhausts of the engine from the muffler body rearwardly of said motorcycle, said discharge pipes having a length so as to terminate forward of the rear axle; and said muffler body being adapted to operate in its entirety for each exhaust from each cylinder of said engine.
Claim 2
Dependent Claim
145 words
A muffler device of a motorcycle having a front and a rear wheel comprising: a single muffler body for silencing the exhaust noise of a multicylinder engine, said muffler body being located beneath said engine, said entire muffler body curving and projecting upwardly forward of the lower front portion of the engine; a plurality of exhaust pipes each of which is connected proximately at one end thereof to said muffler body and each of which is connected at the other end thereof to respective cylinders of the engine; discharge pipes connected to said muffler body to discharge the exhausts of the engine from the muffler body rearwardly of said motorcycle, said discharge pipes having a length so as to terminate forward of the rear axle; and said muffler body being adapted to operate in its entirety for each exhaust from each cylinder of said engine.
Claim 3
Dependent Claim
26 words
The muffler device of the claim 1, wherein said plurality of exhaust pipes are disposed substantially vertically at the places of connection with said muffler body.
Claim 4
Dependent Claim
14 words
The muffler device of claim 1, wherein said muffler body is provided with ribs.
Claim 5
Dependent Claim
16 words
The muffler device of claim 1, wherein said exhaust pipes are welded to said muffler body.
Claim 6
Dependent Claim
16 words
The muffler device of claim 1, wherein said discharge pipes are welded to said muffler 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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |