Patent US3853201A successfully refreshed from Google Patents.
US3853201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quiet snowmobile
Assignee: Outboard Marine Corp
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Filing: 1974-03-14
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Granted: 1974-12-10
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Expires: 1994-03-14
Abstract
Abstract Disclosed herein is a snowmobile including a hood extending from a frame portion to a transverse partition extending upwardly from the frame portion and defining, with the frame portion and with the transverse partition, a substantially closed compartment, together with first wall means extending in the compartment and dividing the compartment into an air supply chamber and an exiting air chamber, second wall means extending in the air supply chamber and dividing the air supply chamber into an entering air sub-chamber and a carburetor air supply sub-chamber communicating with the entering air sub-chamber, and an internal combustion engine mounted on the frame within the compartment and including a pair of cylinders, an engine cooling system including means defining an engine cooling air passage communicating between the entering air sub-chamber and the exiting air chamber, and a carburetor operably communicating with the cylinders and including an air inlet communicating with the carburetor air supply sub-chamber. The snowmobile disclosed herein also includes separate first and second mufflers mounted on the frame in the exiting air chamber and connected to the respective exhaust ports of the cylinder, together with baffled air inlet means communicating with the air supply chamber and baffled air outlet means communicating with the exiting air chamber. The mufflers disclosed herein each include a series of barriers dividing the muffler into a series of chambers with one of the chambers including a single exhaust megaphone and with another of the chambers including a perforated barrier adjacent to one of the end walls of the muffler.
Inventors
- 👤 W Smale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:05
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; F; F01; F01N; F01N1/00; F01N1/08; F02; F02B; F02B77/00; F02B77/11; F02B77/13; B60; B60R; B60R13/00; B60R13/08; B60R13/0838; B62M2027/023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
A muffler comprising a generally tubular housing having opposed end walls, a first barrier spaced axially from one of said end walls and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber, a third barrier spaced axially from said second barrier in the direction away from said one end wall and defining, with said second barrier, a central chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust mEgaphone in said megaphone chamber and including an outlet portion terminating adjacent to said other end wall, a first pipe extending from said megaphone chamber to said central chamber, a second pipe extending from said central chamber to said end chamber, a third pipe extending from said end chamber to said exhaust chamber, and an exhaust discharge pipe having a discharge portion extending from said outlet chamber outwardly of said housing.
Claim 2
Dependent Claim
173 words
A muffler comprising a generally tubular housing having opposed end walls, a first barrier spaced axially from one of said end walls and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber, a third barrier spaced axially from said second barrier in the direction away from said one end wall and defining, with said second barrier, a central chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust mEgaphone in said megaphone chamber and including an outlet portion terminating adjacent to said other end wall, a first pipe extending from said megaphone chamber to said central chamber, a second pipe extending from said central chamber to said end chamber, a third pipe extending from said end chamber to said exhaust chamber, and an exhaust discharge pipe having a discharge portion extending from said outlet chamber outwardly of said housing.
Claim 3
Dependent Claim
154 words
A muffler comprising a generally tubular housing having opposed end walls, a perforated baffle in adjacently spaced and parallel relation of one of said opposed end walls, a first barrier spaced axially from said perforated baffle in the direction away from said one end wall and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust megaphone in said megaphone chamber and including an outlet portion terminating adjacent to said other end wall, passage means connecting said megaphone chamber to said end chamber, a pipe extending from said end chamber to said exhaust chamber, and an exhaust discharge pipe including a discharge portion extending from said outlet chamber outwardly of said housing.
Claim 4
Dependent Claim
154 words
A muffler comprising a generally tubular housing having opposed end walls, a perforated baffle in adjacently spaced and parallel relation of one of said opposed end walls, a first barrier spaced axially from said perforated baffle in the direction away from said one end wall and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust megaphone in said megaphone chamber and including an outlet portion terminating adjacent to said other end wall, passage means connecting said megaphone chamber to said end chamber, a pipe extending from said end chamber to said exhaust chamber, and an exhaust discharge pipe including a discharge portion extending from said outlet chamber outwardly of said housing.
Claim 5
Dependent Claim
231 words
A muffler comprising a generally tubular housing having opposed end walls, a perforated baffle in adjacently spaced and parallel relation to one of said opposed end walls, a first barrier spaced axially from said perforated baffle in the direction away from said one end wall and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber, a third barrier spaced axially from said second barrier in the direction away from said one end wall and defining, with said second barrier, a central chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust megaphone in said megaphone chamber and including an inlet portion extending radially outwardly from said megaphone chamber and having an outlet portion extending at a right angle to said inlet portion and terminating adjacent to said other end wall, a first tubular pipe extending from said megaphone chamber to said central chamber, a second tubular pipe extending from said central chamber to said end chamber, a third tubular pipe extending from said end chamber to said outlet chamber, and an exhaust discharge pipe having an inlet portion extending in said outlet chamber, and a discharge portion extending from said inlet portion and outwardly of said housing.
Claim 6
Dependent Claim
231 words
A muffler comprising a generally tubular housing having opposed end walls, a perforated baffle in adjacently spaced and parallel relation to one of said opposed end walls, a first barrier spaced axially from said perforated baffle in the direction away from said one end wall and defining, with said one end wall, an end chamber, a second barrier spaced axially from said first barrier in the direction away from said one end wall and defining, with said first barrier, an outlet chamber, a third barrier spaced axially from said second barrier in the direction away from said one end wall and defining, with said second barrier, a central chamber and defining, with the other of said opposed end walls, a megaphone chamber, a single exhaust megaphone in said megaphone chamber and including an inlet portion extending radially outwardly from said megaphone chamber and having an outlet portion extending at a right angle to said inlet portion and terminating adjacent to said other end wall, a first tubular pipe extending from said megaphone chamber to said central chamber, a second tubular pipe extending from said central chamber to said end chamber, a third tubular pipe extending from said end chamber to said outlet chamber, and an exhaust discharge pipe having an inlet portion extending in said outlet chamber, and a discharge portion extending from said inlet portion and outwardly of said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |