Scaffold including reversible and adjustable driving and steering unit
OwnerJohn A. Slusarenkoinventor
Life of this patent
Estimating the term…
Abstract
A simple and versatile knock-down scaffold structure is provided, complete in itself, supported on four normally inert corner wheels, and capable, through adjustment and/or substitution of parts, to be varied in length, width and/or height, is modified by the optional addition of a power driving and steering unit comprising a fifth wheel and a reversible, variable speed driving motor therefor, through which the scaffold may be driven forward or backward, being desirably steered and controlled as to speed and direction by a workman on the scaffold. The power driving and steering unit may be varied in height to accommodate whatever variations of height are available in the conventional scaffold structure. It may also be varied in ground pressure to increase the driving traction as desired.
Claims8
A scaffold including, in combinaton, a steering and driving unit which scaffold has a front end frame member that includes roller supported corner posts, cross-bars that connect the corner posts, and a vertical intermediate steering and driving bar, and said unit having, in combination,
- a. a drive wheel,
- b. a wheel and motor supporting frame on which the drive wheel is revolably mounted,
- c. carrying means for the motor supporting frame adapted for attachment to an end frame member of the scaffold,
- d. a reversible, variable speed wheel driving motor carried by said motor supporting frame,
- e. driving connections between the motor and the drive wheel, and
- f. steering means at the forward end of the scaffold conveniently accessible to an occupant of the scaffold for controlling the direction in which the drive wheel points, the drive wheel frame being carried by a drive wheel stem having supporting plural prong hangers which hang on cross-bars of the scaffold end frame member and embrace a vertical bar thereof.
A knock-down scaffold comprising, in combination,
- a. front and rear rigid end frame members, each of which includes a pair of corner posts, each post having a freely pivotal roller caster at its lower end and an offset wheel mounted on the caster, a plurality of cross-connecting bars available as platform supports at different levels, and an intermediate vertical bar,
- b. means rigidly connecting said front and rear rigid frame members to one another,
- c. a steerable driving roller mounted at one end of the scaffold together with power means for driving said roller, and
- d. a locking bar adapted for application to the rear casters for locking the rear casters in straight-ahead positions, the construction and arrangement being such that the front corner rollers will automatically assume the direction of the driving roller, but the rear corner rollers will be always compelled to point straight ahead.
Dependencies are inferred from the claim text.