US4434755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorcycle with closeable engine intake and exhaust passages
Assignee: Yamaha Motor Co Ltd
•
Filing: 1981-12-17
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Granted: 1984-03-06
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Expires: 2001-12-17
Abstract
Abstract An intake and exhaust system for a compact motorcycle including a valve arrangement for closing both the intake and exhaust systems so as to preclude the escape of fuel vapors to the surrounding area when the motorcycle is not in use.
Inventors
- 👤 Hisashi Kazuta
- 👤 Yasunari Kawai
- 👤 Naoki Tsuchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:04
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/085; F02; F02B; F02B61/00; F02B61/02; F02B75/00; F02B75/16; F02M; F02M35/00; F02M35/10; F02M35/10006; F02M35/10013; F02M35/10091; F02M35/10144; F02M35/1015; F02M35/10196; F02M35/16; F02M35/162; F02B75/02; F02B2075/022; F02B2075/025; F02B61/06; F02M35/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
In a motorcycle or the like having an internal combustion engine having a combustion chamber, an induction system for said engine having a charge forming device for delivering a fuel air charge to said combustion chamber and an air inlet upstream of said charge forming device, and an exhaust system leading from said combustion chamber and terminating in an outlet that communicates with the atmosphere, the improvement comprising valve means contiguous to said inlet and said outlet for closing the communication of said induction system and said exhaust system with the atmosphere.
Claim 2
Dependent Claim
92 words
In a motorcycle or the like having an internal combustion engine having a combustion chamber, an induction system for said engine having a charge forming device for delivering a fuel air charge to said combustion chamber and an air inlet upstream of said charge forming device, and an exhaust system leading from said combustion chamber and terminating in an outlet that communicates with the atmosphere, the improvement comprising valve means contiguous to said inlet and said outlet for closing the communication of said induction system and said exhaust system with the atmosphere.
Claim 3
Dependent Claim
23 words
A motorcycle as set forth in claim 1 wherein the exhaust system outlet and the induction system inlet are juxtaposed to each other.
Claim 4
Dependent Claim
21 words
A motorcycle as set forth in claim 2 wherein the valve means operates to close the inlet and the outlet simultaneously.
Claim 5
Dependent Claim
20 words
A motorcycle as set forth in claim 3 wherein a single valve element closes both the inlet and the outlet.
Claim 6
Dependent Claim
54 words
A motorcycle as set forth in claim 4 wherein the inlet and the outlet are formed by adjacent pipes terminating within a cup-shaped element having its open end disposed adjacent said inlet and said outlet, the single valving element being cooperative with the open end of said cup-shaped element for closing said cup-shaped element.
Claim 7
Dependent Claim
31 words
A motorcycle as set forth in claim 5 wherein the inlet system extends along one side of the engine and the exhaust system extends along the other side of the engine.
References Cited (Backward Citations)
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US4175630A
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US4143731A
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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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |