Abstract: In an anti-skid device of fit-in type, less time and effort are needed for adjusting the inner width of anti-skid bodies. The anti-skid device is such that two or more anti-skid bodies having a U-shaped cross-section are fitted therein with a tire of a car and arranged in circumferential direction of the tire so as to be connected with one another. An exterior part of each anti-skid body is provided with a contact member for contacting with an outside surface of the tire, while an interior part is provided with a contact member for contacting with an inside surface of the tire. The exterior part or the interior part of each anti-skid body is attached thereto with a shaft 7 along an axial direction of the tire T. The shaft can move forward and backward in the axial direction of the tire. The contact member 6 is provided at an inner end of the shaft. An elastic member 9 is provided to apply a forward movement force to the shaft attached thereto with the contact member.
Abstract: An automotive device for increasing the traction on a supporting surface including a body mountable on a wheel hub and carrying a plurality of radially extending traction arms that are mounted for movement between retracted positions and extended positions in which the outer ends of the arms lie over the tread of the vehicle. Several different embodiments are shown, including L-shaped flexible plastic arms with enlarged outer ends having bumps and openings for increased traction, arcuately curved arms of substantially uniform width, elongated spring coils supported in nozzles for directing the outer ends into extended positions, either across the tread or in a V-shaped configuration over the tread, and others. Automatic actuators include rotary motors driving pinion gears meshing with racks on the traction arms, linear actuators for the spring coils, and others.
Abstract: A lightweight device for obtaining improved traction efficiency of rubber tired vehicles without adding ballast weight. The device has resilient traction intensifying means secured to a driving tire, including auxiliary means for utilizing stronger sub-surface soil, providing higher drawbar pull at a higher rate of travel speed; and means for convenient attachment and removal.
Abstract: Device and method utilizing a fixed assembly attachable to a vehicle wheel back support plate, and a journaled, rotatable assembly carrying a track which may be deployed to engage and rotate with the wheel, or retracted for stable storage. The track is supported by leading and trailing arms carried on the rotatable assembly of the device, which arms in turn are movable concentrically to the device journal to expand the track around the tire and move inwardly upon completion of the track expansion to encircle the tire. Tracks utilizing linkages and rigid traction bars, or resilient members may be employed. Deployment and retraction power may be manual or provided by springs preloadable utilizing the rotational energy of the wheel, by fluid means, i.e. hydraulic vacuum and pneumatic, or by electric power, with the deployment and retraction being powered by a common means, or with the two movements or portions thereof being powered by a combination of power means.