Back to results
US 2003/0150658 A1Published application
Snowmobile exhaust system
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsTakuji Nakano, Shinichi Nishijima
Life of this patent
Estimating the term…
Abstract
A snowmobile has a frame construction that defines a recess above a drive unit. The recess is formed by a horizontal member and a pair of vertical members. A portion of the exhaust system extends within the recess at a location above the drive unit. An exhaust system cooling passage is provided to reduce temperature rise of the exhaust system.
Claims21
A snowmobile comprising:
- a frame assembly comprising a forward portion and an inverted generally U-shaped portion;
- an engine mounted to the forward portion of the frame assembly;
- a drive belt powered by said engine and disposed at least partially within said inverted generally U-shaped portion;
- an exhaust system connected to the engine and extending rearwardly of the engine in a region defined between the inverted generally U-shaped portion and the drive belt;
- and
- an exhaust system cooling passage defined between the forward portion of the frame assembly and the rear of the snowmobile, the exhaust system cooling passage being located adjacent at least a portion of the exhaust system.
3 more elements
A snowmobile comprising:
- a frame assembly comprising a forward portion and an inverted generally U-shaped portion;
- an engine mounted to the forward portion of the frame assembly;
- a seat coupled with mounted to the U-shaped portion of the frame assembly;
- an exhaust system connected to the engine and extending rearwardly of the engine in a region defined below the seat to a silencer box positioned generally below the seat;
- and
- a resilient seat mount positioned between the silencer box and the seat, the resilient seat mount configured to reduce heat transfer between the silencer box and the seat.
3 more elements
Dependencies are inferred from the claim text.