US4699232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust pipe cover for motorcycles
Assignee: Honda Motor Co Ltd
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Filing: 1986-06-16
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Granted: 1987-10-13
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Expires: 2006-06-16
Abstract
Abstract A motorcycle of the type having horizontally opposed cylinder blocks and rearwardly extending exhaust pipes therefrom having a cover on either side of the vehicle extending from around the underside of the cylinder blocks to at least below the rearwardmost footrest. The cover is a U-shaped cross-sectional structure with an upper side, a lower side and an outward side. A rear wall extends downwardly from immediately behind the cylinder blocks to direct the hot air around the exhaust pipes at the engine downwardly and rearwardly.
Inventors
- 👤 Hideaki Nebu
- 👤 Katsusuke Komuro
- 👤 Toshiyuki Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:05
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B61/00; F02B61/02; F02B2075/1804; F02B2075/1816
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
For use in a motorcycle having an engine including a cyclinder block, a footrest positioned rearwardly of said cylinder block and an exhaust pipe extending rearwardly from said cylinder block in underlying relation to said footrest, an exxhaust pipe cover separating said exhaust pipe from said footrest comprising wall means disposed about said exhaust pipe and forming a flow passage for directing cooling air in heat exchange relation with said exhaust pipe, said wall means including means for diverting air heated by said exhaust pipe in a direction away from said footrest.
Claim 2
Dependent Claim
92 words
For use in a motorcycle having an engine including a cyclinder block, a footrest positioned rearwardly of said cylinder block and an exhaust pipe extending rearwardly from said cylinder block in underlying relation to said footrest, an exxhaust pipe cover separating said exhaust pipe from said footrest comprising wall means disposed about said exhaust pipe and forming a flow passage for directing cooling air in heat exchange relation with said exhaust pipe, said wall means including means for diverting air heated by said exhaust pipe in a direction away from said footrest.
Claim 3
Dependent Claim
28 words
The organization as recited in claim 1 in which said heated air diverting means directs said heated air laterally of the longitudinal axis of said exhaust pipe cover.
Claim 4
Dependent Claim
98 words
The organization as recited in claim 2 in which said wall means include a top wall interposed between said exhaust pipe and said footrest and a side wall depending downwardly from said top wall, said top wall including a first portion substantially coextensive with said cylinder block, a second portion vertically displaced from said first portion and extending in underlying relation to said footrest and a rear wall portion extending between said first portion and said second portion and forming a baffle surface for diverting cooling air heated by said exhaust pipe downwardly away from said second portion.
Claim 5
Dependent Claim
30 words
The organization as recited in claim 3 in which said wall means further include a bottom wall displaced inwardly from said side wall in underlying relation to said exhaust pipe.
Claim 6
Dependent Claim
39 words
The organization as recited in claim 4 in which said bottom wall is substantially coextensive with said side wall and said wall means cooperate to define an exhaust pipe cover having a substantially U-shaped cross section along its length.
Claim 7
Dependent Claim
108 words
An exhaust system for a motorcycle having an engine including generally laterally extending cylinder blocks, a plurality of longitudinally spaced, laterally extending footrests disposed rearwardly of said cylinder blocks, exhaust pipe means connecting with said cylinder blocks and extending rearwardly from said cylinder blocks in underlying relation to said footrests, an exhaust pipe cover comprising wall means substantially coextensive with said exhaust pipe disposed between said exhaust pipe and said footrests and forming a flow passage for conducting cooling air in heat exchange relation with said exhaust pipe, said wall means including means for diverting air heated by said exhaust pipe in a direction away from said footrests.
Claim 8
Dependent Claim
108 words
An exhaust system for a motorcycle having an engine including generally laterally extending cylinder blocks, a plurality of longitudinally spaced, laterally extending footrests disposed rearwardly of said cylinder blocks, exhaust pipe means connecting with said cylinder blocks and extending rearwardly from said cylinder blocks in underlying relation to said footrests, an exhaust pipe cover comprising wall means substantially coextensive with said exhaust pipe disposed between said exhaust pipe and said footrests and forming a flow passage for conducting cooling air in heat exchange relation with said exhaust pipe, said wall means including means for diverting air heated by said exhaust pipe in a direction away from said footrests.
Claim 9
Dependent Claim
28 words
The organization as recited in claim 6 in which said heated air diverting means directs said heated air laterally of the longitudinal axis of said exhaust pipe cover.
Claim 10
Dependent Claim
101 words
The organization as recited in claim 7 in which said wall means include a top wall interposed between said exhaust pipe and said footrests and a side wall depending downwardly from said top wall, said top wall including a first portion substantially coextensive with said cylinder block, a second portion vertically displaced from said first portion and extending in underlying relation to the forwardmost of said footrests and a rear wall portion extending between said first portion and said second portion and forming a baffle surface for diverting cooling air heated by said exhaust pipe downwardly away from said second portion.
Claim 11
Dependent Claim
56 words
The organization as recited in claim 8 in which said exhaust system includes a muffler connected to said exhaust pipe, the other of said footrests being positioned superjacent said muffler and in which said top wall includes a third portion vertically displaced from said second portion and interposed between said exhaust pipe and said other footrest.
Claim 12
Dependent Claim
30 words
The organization as recited in claim 9 in which said wall means further include a bottom wall diplaced inwardly from said side wall in underlying relation to said exhaust pipe.
Claim 13
Dependent Claim
39 words
The organization as recited in claim 10 in which said bottom wall is substantially coextensive with said side wall and said wall means cooperate to define an exhaust pipe cover having a substantially U-shaped cross section along its length.
References Cited (Backward Citations)
US2875841A
Cited
US4550794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |