Portable collapsible scaffold structure

A portable collapsible scaffold structure adapted to be supported in use and transported by a self-powered ground vehicle, said scaffold structure comprising first extensible support means adapted to be mounted on the associated vehicle, two spaced-apart parallel extensible boom members releasably attachable to said support means for support thereby in an inclined use configuration with the upper ends thereof being spaced a substantial distance horizontally away from the vehicle, second extensible support means adapted to be supported on the ground and pivotally secured at the upper end thereof to said boom members outboard of said first support means, drive means coupled to said first and second means for extension and retraction thereof to change the angle of inclination of said boom members with respect to the ground, a work platform extending in use between said boom members and removably pivotally secured thereto adjacent to the upper ends thereof, and control means coupled to said boom members and to said platform and operative when the angle of inclination of said boom members changes to effect a corresponding change in the angle between said boom members and said platform for maintaining said platform substantially horizontal, said support means and said boom members and said platform and said drive means and said control means all being dimensioned so that when disassembled from one another they may be readily stored on the associated vehicle for transportation thereby.

A portable collapsible scaffold structure adapted to be supported in use and transported by a self-powered ground vehicle, said scaffold structure comprising first extensible support means adapted to be mounted on the associated vehicle, two spaced-apart parallel extensible boom members releasably attachable to said support structure for support thereby in an inclined use configuration with the upper ends thereof being spaced a substantial distance horizontally away from the vehicle, second extensible support means adapted to be supported on the ground and pivotally secured at the upper end thereof to said boom members outboard of said first support means, extensible coupling means connected between said second support means and the lower ends of said boom members, drive means coupled to said first and second support means and to said coupling means for extension and retraction thereof to change the angle of inclination of said boom members with respect to the ground and to effect corresponding variations in the spacing between said second support means and the lower ends of said boom members, a work platform extending in use between said boom members and removably pivotally secured thereto adjacent to the upper ends thereof, and control means coupled to said boom members and to said platform and operative when the angle of inclination of said boom members changes to effect a corresponding change in the angle between said boom members and said platform for maintaining said plaftform substantially horizontal, said support means and said boom members and said coupling means and said platform and said drive means and said control means all being dimensioned so that when disassembled from one another they may be readily stored on the associated vehicle for transportation thereby.

A portable collapsible scaffold structure adapted to be supported in use and transported by a self-powered ground vehicle, said scaffold structure comprising first extensible support means adapted to be mounted on the associated vehicle, two spaced-apart parallel extensible boom members releasably attachable to said support structure for support thereby in an inclined use configuration with the upper ends thereof being spaced a substantial distance horizontally away from the vehicle, second extensible support means adapted to be supported on the ground and pivotally secured at the upper end thereof to said boom members outboard of said first support means, carriage means disposed in rolling engagement with the ground and releasably pivotally coupled to the lower end of each of said boom members and extending forwardly therefrom, third extensible support means interconnecting the forward end of said carriage means and points on said boom members intermediate the lower ends thereof and the points of connection thereto of said second support means, extensible coupling means interconnecting said second and third support means, drive means coupled to said first and second and third extensible support means and to said extensible carriage means and to said extensible coupling means for effecting extension and retraction thereof to change the angle of inclination of said boom members with respect to the ground, the extension and retraction of said coupling means serving to effect movement of the lower ends of said boom members toward and away from the lower end of said second support means to facilitate positioning of said boom members, the extension and retraction of said carriage means and said coupling means serving to facilitate folding of said second and third support means against said boom members for storage and transportation thereof, a work platform extending in use between said boom members and removably pivotally secured thereto adjacent to the upper ends thereof, and control means coupled to said boom members and to said platform and operative when the angle of inclination of said boom members changes to effect a corresponding change in the angle between said boom members and said platform for maintaining said platform substantially horizontal, said support means and said boom members and said carriage means and said coupling means and said platform and said drive means and said control means all being dimensioned so that when disassembled from one another they may be readily stored on the associated vehicle for transportation thereby.