Liquid cooling system for use on snowmobiles

Claim 2

A cooling system for a liquid cooled internal combustion engine mounted on a snowmobile, said snowmobile having a belt like drive track powered by said engine and engaging the snow for propelling the snowmobile, said track having a lower portion engaging the snow and an upper portion, at least one tubular coolant carrying member connected to said engine, means for circulating coolant through said engine and said tubular member, and means to position said tubular member adjacent to said track whereby snow carried into the air by said track will contact said tubular member.

Claim 3

The cooling system of claim 1 wherein said snowmobile includes track support means comprising a tunnel member having spaced apart, generally upright side walls positioned on opposite longitudinal sides of said track, and means to mount said tubular member on said side walls.

Claim 4

The cooling system of claim 2 and a plurality of cooling fins mounted on said tubular member in position to catch snow dropping from the edges of said track.

Claim 5

A snowmobile having a power unit and a liquid cooling system for said power unit, said snowmobile comprising a main frame member, said power unit being positioned adjacent to one end of said main frame member, and drive means for said snowmobile comprising means which contact the surface over which the snowmobile moves in at least longitudinally spaced locations with respect to said frame, longitudinally extending support means for supporting the drive means in longitudinally spaced locations, and an elongated tubular coolant carrying member connected to said power unit cooling system and providing circulation of power unit liquid coolant therethrough, and means to mount said coolant carrying member on said support means and extending in longitudinal direction adjacent to said drive means to provide a path of flow of coolant remote from said power unit, and in a location where movement of air is affected by said drive means.

Claim 6

A snowmobile having a power unit and a liquid cooling system for said power unit, said snowmobile comprising a main frame member, said power unit being positioned adjacent to one end of said main frame member, and drive means for said snowmobile comprising means which contact the surface over which the snowmobile moves in at least longitudinally spaced locations with respect to said frame, longitudinally extending support means for supporting the drive means in longitudinally spaced locations, and an elongated tubular coolant carrying member connected to said power unit cooling system and providing circulation of power unit liquid coolant therethrough, and means to mount said coolant carrying member on said support means and extending in longitudinal direction adjacent to said drive means to provide a path of flow of coolant remote from said power unit, and in a location where movement of air is affected by said drive means.

Claim 7

The combination as specified in claim 4 wherein said drive means comprises an endless track member mounted to extend longitudinally along said frame.

Claim 8

In a cooling system for a snow vehicle having a power unit with a liquid cooling system, said snow vehicle having drive means for engaging the snow comprising an endless track member, and support means for said endless track member comprising a downwardly open inverted U shaped tunnel, the improvement comprising tubular coolant carrying means connected to said power unit cooling system, and means to mount at least portions of said tubular coolant carrying means toward the interior of said tunnel adjacent to said endless track member to provide a path of flow of coolant remote from said power unit.

Claim 9

In a cooling system for a snow vehicle having a power unit with a liquid cooling system, said snow vehicle having drive means for engaging the snow comprising an endless track member, and support means for said endless track member comprising a downwardly open inverted U shaped tunnel, the improvement comprising tubular coolant carrying means connected to said power unit cooling system, and means to mount at least portions of said tubular coolant carrying means toward the interior of said tunnel adjacent to said endless track member to provide a path of flow of coolant remote from said power unit.

Claim 10

A snowmobile having a frame, a power unit for propelling said Snowmobile, a liquid cooling system for said power unit, and an endless drive track member for said snowmobile, a support for said endless drive track member comprising a pair of side wall means spaced laterally apart on said frame, and means substantially closing the space between said side walls above said drive track member with upper portions of said drive track member being above the lower edges of said side walls, a tubular coolant carrying means connected to the power unit cooling system to carry coolant flow remote from said power unit, at least portions of the tubular coolant carrying means being positioned on said side walls remote from said power unit and adjacent to said drive track member.

Claim 11

A snowmobile having a frame, a power unit for propelling said Snowmobile, a liquid cooling system for said power unit, and an endless drive track member for said snowmobile, a support for said endless drive track member comprising a pair of side wall means spaced laterally apart on said frame, and means substantially closing the space between said side walls above said drive track member with upper portions of said drive track member being above the lower edges of said side walls, a tubular coolant carrying means connected to the power unit cooling system to carry coolant flow remote from said power unit, at least portions of the tubular coolant carrying means being positioned on said side walls remote from said power unit and adjacent to said drive track member.