Resiliently mounted, pivotable steering roll, especially for dri

Details Resiliently mounted, pivotable steering roll, especially for dri Resiliently mounted, pivotable steering roll, especially for dri

1986-08-13

1988-08-16

Mitchell, David M.

Land vehicles

Wheeled

16 44, 180168, 280 4716, 280 791R, 280754, B60B 3304

Patent

active

047639105

ABSTRACT:
This device prevents individual components of a load from being thrown off during halting of a conveying vehicle at a high rate of deceleration. A blocking device for the suspension of the caster which instantly assumes a front position as viewed in the direction of travel, prevents the vehicle from forwardly and downwardly dipping about the axle of the center-mounted drive wheels. The blocking device automatically adjusts itself corresponding to the direction of motion. A sliding stop vertically displaceably mounted on a pivotable part of a caster arrangement and a stop component fixedly mounted on the vehicle body cooperate to block the suspension of this front caster when the front caster experiences a predetermined degree of suspension displacement. At the caster instantly assuming the rear position, the stop component and the sliding stop are positioned at 180.degree. to one another, thus precluding inadvertent engagement and permitting full suspension displacement. When changing direction of travel, both casters pivot automatically about a vertical axis, blocking the suspension of the front caster in the new direction of travel and permitting the rear caster to exploit its full suspension displacement range.

REFERENCES:
patent: 2707795 (1955-05-01), Skupas
patent: 2885720 (1959-05-01), Seeberger
patent: 3032805 (1962-05-01), Skupas et al.
patent: 3174176 (1965-03-01), Olson
patent: 4462138 (1984-07-01), Black
patent: 4494272 (1985-01-01), Morita
patent: 4515235 (1985-05-01), Yamamoto et al.

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