Abstract: A snow vehicle has an undercarriage provided with two runners. The vehicle is of the type which operates on an incline under gravity, i.e. of the sled-type. The runners are spring mounted on the vehicle and an arrangement is provided for horizontally guiding the runners and in particular preventing their breaking-out in lateral direction. The arrangement has a long spring stroke but is of low overall construction and has a flat spring characteristic.

Abstract: A snowmobile support dolly has a pair of two-wheeled H-frame ski dollies and a caster wheeled H-frame track dolly for supporting the steering skis and drive track, respectively, of a snowmobile. The ski dollies clamp to the bottom of the steering skis, and the track dolly has spaced transverse members which hold it in place between the transverse ribs of the track, so that the snowmobile is easily wheeled about.

Abstract: An improved ski device which incorporates a power unit for providing forward thrust and which is capable of operation over water, snow, ice, artificial surfaces, or the like. In one embodiment, the unit utilizes an upright chassis which is articulated to a single runner and has a seat with handles that preferably include control and brake means. The power unit may be mounted in the chassis or rearwardly of the seat on a framework. The framework may be made adjustable so as to permit the angle of thrust imparted by the power unit to be varied. In an alternative embodiment, steering means may be provided in the form of a separate, steering ski pivotally mounted to a steering column and handle bar assembly which extends from the forward portion of the chassis. Outrigger pontoons or skis may be provided as the intended use dictates.

Abstract: A liquid cooling system for a snowmobile or other relatively small vehicle having a heat exchange element with front and rear surfaces and air passages extending therebetween, a plurality of air guides for providing a flow of air to the front surface of the heat exchanger and a duct for directing air flow from the rear surface of the heat exchanger upwardly through a portion of the vehicle hood. Preferably the heat exchange element is tipped to increase the flow of air therethrough during idling and at slow speeds.

Abstract: A device for the support of a prime mover for the purpose of providing a one-man locomotion apparatus when used in combination with a vehicle such as skis, skates, wheels, etc., comprising a lightweight framework construction. A harness is provided for attaching said framework to the body of the person to ensure the locomotion thereof. The device relates to carriers of prime movers, principally the internal combustion engine, and employs a new and useful steering control means to better facilitate navigation over snow, ice, land, and water.