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US4648474A
Expired / Lapsed
US
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Air cleaner system for motorcycles
Assignee: Honda Motor Co Ltd
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Filing: 1983-09-27
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Granted: 1987-03-10
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Expires: 2003-09-27
Abstract
Abstract An air cleaner system for motorcycles employing the hollow interior of a main frame member. A U-shaped cavity facing forwardly of the motorcycle in the fuel tank allows access to the air cleaner assembly positioned within the main frame member. An inlet opening is provided on the upper surface of the main frame member while outlet openings on the lower surface thereof extend to carburetors. The inlet opening of the main frame member is reinforced and a baffle is positioned between the air filter assembly and the intake passages to the carburetors.
Inventors
- 👤 Takashi Shinozaki
- 👤 Satoshi Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/16; F02M35/162; B; B62; B62K; B62K11/00; F02B; F02B61/00; F02B61/02; F02M35/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
65 words
A motorcycle comprising a frame including a main frame member of hollow construction forming an enclosed cavity having an inlet opening through the upper side thereof; a fuel tank positioned on said main frame member and having a U-shaped cavity facing forwardly on the motorcycle to extend around said opening in said main frame member; and an air cleaner assembly positioned in said inlet opening.
Claim 2
Dependent Claim
65 words
A motorcycle comprising a frame including a main frame member of hollow construction forming an enclosed cavity having an inlet opening through the upper side thereof; a fuel tank positioned on said main frame member and having a U-shaped cavity facing forwardly on the motorcycle to extend around said opening in said main frame member; and an air cleaner assembly positioned in said inlet opening.
Claim 3
Dependent Claim
22 words
The motorcycle of claim 1 wherein said main frame member further has at least one outlet opening through the lower side thereof.
Claim 4
Dependent Claim
19 words
The motorcycle of claim 1 wherein said main frame member is a box section having a rectangular cross section.
Claim 5
Dependent Claim
26 words
The motorcycle of claim 1 wherein said main frame member is spaced from said fuel tank to provide air flow therebetween over said air cleaner assembly.
Claim 6
Dependent Claim
38 words
The motorcycle of claim 1 having an engine with at least one intake passage, said main frame member including an outlet opening connected with each of the intake passages through the lower side of said main frame member.
Claim 7
Dependent Claim
27 words
The motorcycle of claim 5 wherein said inlet opening and said outlet openings provide the sole air communication to the hollow interior of said main frame member.
Claim 8
Dependent Claim
32 words
The motorcycle of claim 1 wherein said frame further includes a head tube and a center frame structure, said main frame member extending from said head tube to said center frame structure.
Claim 9
Dependent Claim
21 words
The motorcycle of claim 1 wherein said inlet opening includes a reinforcing plate extending about the periphery of said inlet opening.
Claim 10
Dependent Claim
42 words
The motorcycle of claim 1 wherein said air cleaner assembly includes a cover and an air cleaner element, said cover extending across said inlet opening, said air cleaner element extending beneath said cover into the cavity formed by said main frame member.
Claim 11
Dependent Claim
39 words
The motorcycle of claim 9 wherein said cover and said air cleaner element define a barrier at said inlet opening restricting air communication with the hollow interior of said main frame member to flow through said air cleaner element.
Claim 12
Dependent Claim
33 words
The motorcycle of claim 9 wherein said cover includes an inlet passage opening rearwardly on the motorcycle within said U-shaped cavity and extending through said cover into communication with said air cleaner element.
Claim 13
Dependent Claim
81 words
A motorcycle comprising an engine having at least one intake passage; a frame including a main frame member of hollow construction having an inlet opening through the upper side thereof and an outlet opening connected to each of said intake passages through the lower side thereof; an air cleaner assembly positioned in said inlet opening; and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet openings.
Claim 14
Dependent Claim
81 words
A motorcycle comprising an engine having at least one intake passage; a frame including a main frame member of hollow construction having an inlet opening through the upper side thereof and an outlet opening connected to each of said intake passages through the lower side thereof; an air cleaner assembly positioned in said inlet opening; and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet openings.
Claim 15
Dependent Claim
104 words
A motorcycle comprising a frame including a main frame member of hollow construction having an inlet opening through the upper side thereof, at least one outlet opening through the lower side thereof and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet opening; and an air cleaner assembly positioned in said inlet opening, said air cleaner assembly including a cover and an air cleaner element, said cover extending across said inlet opening, said air cleaner element extending beneath said cover into the hollow interior of said main frame member.
Claim 16
Dependent Claim
104 words
A motorcycle comprising a frame including a main frame member of hollow construction having an inlet opening through the upper side thereof, at least one outlet opening through the lower side thereof and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet opening; and an air cleaner assembly positioned in said inlet opening, said air cleaner assembly including a cover and an air cleaner element, said cover extending across said inlet opening, said air cleaner element extending beneath said cover into the hollow interior of said main frame member.
Claim 17
Dependent Claim
101 words
A motorcycle comprising a frame including a main frame member of hollow construction forming an enclosed cavity having an inlet opening through the upper side thereof, at least one outlet opening through the lower side thereof and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet opening; a fuel tank positioned on said main frame member and having a U-shaped cavity facing forwardly on the motorcycle to extend around said opening in said main frame member; and an air cleaner assembly positioned in said inlet opening.
Claim 18
Dependent Claim
101 words
A motorcycle comprising a frame including a main frame member of hollow construction forming an enclosed cavity having an inlet opening through the upper side thereof, at least one outlet opening through the lower side thereof and a baffle extending across said main frame member within the hollow interior thereof and being positioned between said air cleaner assembly and said outlet opening; a fuel tank positioned on said main frame member and having a U-shaped cavity facing forwardly on the motorcycle to extend around said opening in said main frame member; and an air cleaner assembly positioned in said inlet opening.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |