Mobile camera crane base
AssigneeChapman/Leonard Studio Equipment, Inc.
InventorLeonard T. Chapman
Life of this patent
Estimating the term…
Abstract
A mobile base for supporting a camera crane arm includes a chassis having front and rear pairs of wheels. Front and rear steering angle compensators are linked respectively to the front and rear wheel pairs. The compensators are pivotally mounted to the chassis. Ground wheels and bogey track wheels are mounted on a kingpin/axle housing at each corner of the mobile base. Kingpins threaded into the kingpins/axle housings act as jacking posts. The mobile base may be steered by one or two operators in various steering modes.
Claims19
A mobile camera crane base comprising:
- a chassis having a front beam and a rear beam;
- a pair of front wheels pivotally supported on the front beam;
- a pair of rear wheels pivotally supported on the rear beam;
- a from wheel steering angle compensator linked to the pair of front wheels;
- a rear wheel steering angle compensator linked to the pair of rear wheels;
- and
- the front and rear wheel steering angle compensators including means for shifting between a corrective steering mode and a crab steering mode.
A steerable camera crane base comprising:
- a rectangular chassis having four comers, with a king pin block at each corner;
- a king pin/axle housing pivotally mounted in each king pin block and having a king pin bore and a wheel axle bore;
- a wheel having an axle extending into the wheel axle bore;
- and
- a jackscrew extending through the king pin bore, perpendicular to the wheel axle and having a screw thread engagement between the jackscrew and the king pin/axle housing.
A mobile camera crane base comprising:
- a chassis having a front beam and a rear beam;
- a pair of front wheels pivotally supported on the front beam;
- a pair of rear wheels pivotally supported on the rear beam;
- a front wheel steering angle compensator linked to the pair of front wheels;
- and
- a rear wheel steering angle compensator linked to the pair of rear wheels, with at least one of the steering angle compensators including a top plate, a center plate, and a bottom plate, and a center hole and left and right crab steering holes extending through the plates.
A steerable camera crane base comprising:
- a rectangular chassis having four corners, with a king pin block at each corner;
- a king pin axle housing pivotally mounted in each king pin block and having a king pin bore and a wheel axle bore;
- a wheel having an axle extending into the wheel axle bore;
- and
- a jackscrew extending through the king pin bore, perpendicular to the wheel axle, and also extending through a hole or slot in the wheel axle.
Dependencies are inferred from the claim text.