Motor vehicles – Additional traction wheel
Patent
1979-02-08
1980-03-18
Skaggs, H. Grant
Motor vehicles
Additional traction wheel
301 49, B60B 1500
Patent
active
041934660
ABSTRACT:
A traction-enhancing device for use with a drive wheel of an automotive vehicle comprises an annular disc mounted on the drive wheel axle inboard of the wheel for rotation therewith, at least one traction element rockably mounted on the inboard face of the disc and normally biased to a rest position, and an actuator mounted on the underside of the vehicle and remotely controlled from the vehicle instrument panel to enable an abutment member connected therewith to be selectively protracted into or retracted from the nadir of the path of revolving movement of a cam portion of the traction element with the disc. When the vehicle is trapped on a slippery surface, such as mud, snow or ice, and the drive wheels can only spin helplessly, the abutment member may be temporarily protracted toward the rotating annular disc, so that once during each full revolution of the wheel the cam portion of the traction element comes into engagement with and is drawn past the abutment member. This causes the element to be rocked in one sense or the other, depending on the direction of rotation of the wheel, into a working position in which a foot portion of the element engages the ground or the mud, snow or ice thereon and acts to inhibit the spinning of the wheel, so as to provide a temporary increase in traction to the wheel and also to impart a small degree of momentum to the vehicle to start the same rolling.
REFERENCES:
patent: 2094425 (1937-09-01), Cook
patent: 3036649 (1962-05-01), Truitt
patent: 3239277 (1966-03-01), Beck
Holler Norbert P.
Skaggs H. Grant
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