US 5,492,353 A · Wheel suspension for a camera dolly

Abstract

A camera dolly has a steering compensator including offset shaft sections and drive members rotationally displaceable from each other. The steering compensator provides steering angle correction in conventional steering wherein the front wheels of the dolly remain fixed straight ahead and the rear wheels steer. A crab-conventional camera dolly steering shift mechanism uses shift plates and sprockets on a vertical axle to shift between crab and conventional steering modes. An electronic shifter, provided as an accessory, automatically shifts between crab and conventional steering modes. A rocker suspension for the wheels of the camera dolly reduces undesired movement of the dolly, and of a camera mounted on the dolly, when the dolly wheels encounter a bump or obstruction. A bogey wheel system improves the performance of the rocker suspension by offsetting the wheels of the dolly dual wheel sets.

Claims9

Dependent claims

A suspension system for a camera dolly comprising:

a kingpin attached to the dolly and having a first side and a second side, with the first side of the kingpin and the second side of the kingpin inclined away from each other at an angle;
a first axle support plate having a first axle and a second axle support plate having a second axle with the first and second axle support plates each having a flat upper section joined at an angle to a lower section;
a pair of upper rockers and a pair of lower rockers, the upper and lower rockers pivotally attached to the upper and lower sections of the first and second axle support plates, respectively, at spaced apart upper and lower attachment points, with the upper attachment points on the upper section vertically aligned with the lower attachment points on the lower section, the upper and lower rockers attached to the kingpin with the first axle support plate adjacent to the first side of the kingpin and with the second axle support plate adjacent to the second side of the kingpin and with the spacing between the upper attachment points equal to the spacing between the lower attachment points.

Dependencies are inferred from the claim text.

Wheel suspension for a camera dolly

Life of this patent

Wheel suspension for a camera dolly

Life of this patent

Abstract

Claims9