Patent US4425977A successfully refreshed from Google Patents.
US4425977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner system for motorcycle engine
Assignee: Honda Motor Co Ltd
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Filing: 1981-12-28
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Granted: 1984-01-17
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Expires: 2001-12-28
Abstract
Abstract An motorcycle has a body frame supporting an engine and provided with a seat. A leg shield on the body frame covers the front of the lower legs of a rider sitting on the seat. A main pipe of the body frame extends between the leg shield and the seat. An air cleaner for the engine has suction ports located on the internal side of the leg shield facing the seat, in order to exclude from the suction ports ram air produced by forward motion of the motorcycle. Two intake pipes straddle the main pipe and connect the suction ports to the air cleaner.
Inventors
- 👤 Masayuki Michiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:37
CPC Classifications
B; B62; B62M; B62M7/00; B62M7/12; F; F02; F02M; F02M35/00; F02M35/16; F02M35/162; B62K; B62K2202/00; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B61/00; F02B61/02; F02M35/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of a rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having a suction port located on the internal side of said leg shield facing said seat, in order to exclude from said suction port ram air produced by forward motion of the motorcycle.
Claim 2
Dependent Claim
102 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of a rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having a suction port located on the internal side of said leg shield facing said seat, in order to exclude from said suction port ram air produced by forward motion of the motorcycle.
Claim 3
Dependent Claim
117 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of the rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having two suction ports located on the internal side of said leg shield facing said seat, in order to exclude from said suction ports ram air produced by forward motion of the motorcycle, and two intake pipes straddling said main pipe and connected to said two suction ports.
Claim 4
Dependent Claim
117 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of the rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having two suction ports located on the internal side of said leg shield facing said seat, in order to exclude from said suction ports ram air produced by forward motion of the motorcycle, and two intake pipes straddling said main pipe and connected to said two suction ports.
Claim 5
Dependent Claim
139 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of the rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having two suction ports located on the internal side of said leg shield facing said seat, a communication port being provided on said leg shield facing said seat and being in fluid communication with said two suction ports, in order to exclude from said suction ports ram air produced by forward motion of the motorcycle, and two intake pipes straddling said main pipe and connected to said two suction ports.
Claim 6
Dependent Claim
139 words
In a motorcycle having a body frame with a seat, said frame supporting an engine, the improvement comprising, in combination: a leg shield on said body frame adapted to cover the front of the lower portions of the legs of the rider sitting on said seat, the body frame having a main pipe extending longitudinally between said leg shield and said seat, an air cleaner for said engine and having two suction ports located on the internal side of said leg shield facing said seat, a communication port being provided on said leg shield facing said seat and being in fluid communication with said two suction ports, in order to exclude from said suction ports ram air produced by forward motion of the motorcycle, and two intake pipes straddling said main pipe and connected to said two suction ports.
Claim 7
Dependent Claim
48 words
The combination set forth in claim 3 in which each of said two intake pipes comprises two air intake passages placed side by side, one of said intake passages being formed shorter than the other intake passage so as to locate its suction port at a lower elevation.
Claim 8
Dependent Claim
38 words
The combination set forth in claim 3 in which a cover of resilient material is mounted over said intake pipes and formed integrally with an upward extending screen for screening the front open ends of said suction ports.
Claim 9
Dependent Claim
41 words
The combination set forth in claim 5 in which said cover cooperates with said leg shield to form a closed air flow chamber around said intake pipes, said chamber communicating with atmosphere through a communication port provided in said leg shield.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |