US3870115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snowmobile exhaust arrangement
Assignee: Yamaha Motor Co Ltd
•
Filing: 1973-05-11
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Granted: 1975-03-11
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Expires: 1993-05-11
Abstract
Abstract A snowmobile is provided at a lower front portion with a well defined by a main front plate projecting downward from the front end of the top plate of an inverted channel shaped main frame, a forwardly progressively elevated front bottom plate having a rear end connected with the lower end of the main front panel and a pair of front side plates extending lengthwise of the main frame, the lower edge of each of the front side plates being connected with the front bottom plate, wherein an exhaust silencer for silencing the noises caused by exhaust gases from an internal combustion engine mounted on the main frame is disposed in the well.
Inventors
- 👤 Hideonori Hase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:39
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; B62M2027/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
A snowmobile comprising: an inverted channel shaped main frame having a top plate; an endless track equipped under said main frame; an internal combustion engine mounted on the front end portion of said top plate for driving said endless track; a pair of front side plates connected with said main frame and projecting forwardly therefrom; a main front plate extending downwardly from the front end of said main frame; a forwardly progressively elevated front bottom plate fixed to the lower edges of said front side plates and having the rear end connected with the lower end of said main front plate, said front bottom plate having the shape of the hull of a vessel; a first exhaust silencer connected with said engine; a second exhaust silencer connected with said first exhaust silencer and disposed in a well defined by said front side plates, main front plate and front bottom plate, thereby utilizing the space of said well; and a stay positioned over said well for suspending said second exhaust silencer.
Claim 2
Dependent Claim
170 words
A snowmobile comprising: an inverted channel shaped main frame having a top plate; an endless track equipped under said main frame; an internal combustion engine mounted on the front end portion of said top plate for driving said endless track; a pair of front side plates connected with said main frame and projecting forwardly therefrom; a main front plate extending downwardly from the front end of said main frame; a forwardly progressively elevated front bottom plate fixed to the lower edges of said front side plates and having the rear end connected with the lower end of said main front plate, said front bottom plate having the shape of the hull of a vessel; a first exhaust silencer connected with said engine; a second exhaust silencer connected with said first exhaust silencer and disposed in a well defined by said front side plates, main front plate and front bottom plate, thereby utilizing the space of said well; and a stay positioned over said well for suspending said second exhaust silencer.
Claim 3
Dependent Claim
170 words
A snowmobile comprising: an inverted channel shaped main frame having a top plate; an endless track equipped under said main frame; an internal combustion engine mounted on the front end portion of said top plate for driving said endless track; a pair of front side plates connected with said main frame and projecting forwardly therefrom; a main front plate extending downwardly from the front end of said main frame; a forwardly progressively elevated front bottom plate fixed to the lower edges of said front side plates and having the rear end connected with the lower end of said main front plate, said front bottom plate having the shape of the hull of a vessel; a first exhaust silencer connected with said engine; a second exhaust silencer connected with said first exhaust silencer and disposed in a well defined by said front side plates, main front plate and front bottom plate, thereby utilizing the space of said well; and a stay positioned over said well for suspending said second exhaust silencer.
Claim 4
Dependent Claim
170 words
A snowmobile comprising: an inverted channel shaped main frame having a top plate; an endless track equipped under said main frame; an internal combustion engine mounted on the front end portion of said top plate for driving said endless track; a pair of front side plates connected with said main frame and projecting forwardly therefrom; a main front plate extending downwardly from the front end of said main frame; a forwardly progressively elevated front bottom plate fixed to the lower edges of said front side plates and having the rear end connected with the lower end of said main front plate, said front bottom plate having the shape of the hull of a vessel; a first exhaust silencer connected with said engine; a second exhaust silencer connected with said first exhaust silencer and disposed in a well defined by said front side plates, main front plate and front bottom plate, thereby utilizing the space of said well; and a stay positioned over said well for suspending said second exhaust silencer.
Claim 5
Dependent Claim
27 words
A snowmobile according to claim 1 wherein said stay bridges said pair of front side plates over said well and is fixed to said second exhaust silencer.
References Cited (Backward Citations)
US3382948A
Cited
US3779327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |