Lifting and installing streetlight poles
AssigneeProgress Energy Carolinas, Inc.
InventorDavid J. Munn
Life of this patent
Estimating the term…
Abstract
Streetlight poles are lifted to a vertical position for installation in a mounting hole or on a support stand by connecting the lift cable of a boom to an elongate sling that is releasably attached to the pole.
Claims19
A method utilizing a boom and associated lifting cable, in conjunction with working personnel on the ground, to raise a streetlight pole to a substantially vertical position, and to install the streetlight pole in a mounting hole or on a support stand, said method comprising the steps of:
- providing a boom and associated lifting cable;
- releasably attaching one end of an elongate sling at a point toward the bottom of a streetlight pole, with a portion of the sling proximate the other end thereof being wrapped around the pole at a point above the balance point of the pole;
- the wrapped-around portion of the sling comprising a loop portion, and wherein the step of wrapping the sling around the pole at a point above the balance point of the pole comprises bringing an end (E) of the loop portion around the pole and then through the main portion of the loop;
- releasably attaching the wrapped-around portion of the sling to the lifting cable;
- beginning to apply a lifting force via the lifting cable to raise the upper end of the pole off the ground while the lower end of the pole continues to rest on the ground;
- and
- continuing to apply a lifting force via the lifting cable without substantial slippage of the wrapped-around portion of the sling with respect to the pole until the pole nears or reaches vertical orientation and the bottom of the pole lifts off the ground, thereby permitting working personnel on the ground to maneuver the lower end of the pole to the mounting hole or support stand.
A streetlight pole and releasably attached elongate sun for use, in conjunction with a lifting device, to raise the streetlight pole to a substantially vertical position where working personnel on the ground can safely and efficiently maneuver the lower end of the pole to a mounting hole or support stand, said sling having first and second ends and a length sufficient to span from an attachment point toward the bottom of the pole to a point above the balance point of the pole, the first end of the sling comprising a loop portion that is wrapped around the pole and then through itself at a point above the balance point of the pole for connecting to a lifting device, cooperative attachment structures located toward the bottom of the pole and at the second end of the sling releasably attaching the second end of the sling to the pole, whereby upon application of a lifting force by the lifting device slack may be eliminated in the length of the sling between the sling first and second ends to prevent slippage of the sling with respect to the pole and to permit raising of the pole to a vertical position where the working personnel on the ground can safely and efficiently maneuver the lower end of the pole to a mounting hole or support stand.
An elongate sling for use, in conjunction with a lifting device, to raise a streetlight pole to a substantially vertical position where working personnel on the ground can safely and efficiently maneuver the lower end of the pole to a mounting hole or support stand, said sling having first and second ends and a length sufficient to span from an attachment point toward the bottom of the pole to a point above the balance point of the pole, the first end of the sling having a loop portion for wrapping around a streetlight pole above the balance point of the pole and for connecting to a lifting device, and said sling further including an attachment structure at the second end of the sling for releasably attaching the second end of the sling to a cooperative attachment structure located toward the bottom of the pole, whereby upon application of a lifting force by the lifting device to the sling loop portion slack may be eliminated in the length of the sling between the sling first and second ends to prevent slippage of the sling with respect to the pole and to permit raising of the pole to a vertical position where the working personnel on the ground can safely and efficiently maneuver the lower end of the pole to a mounting hole or support stand.
Dependencies are inferred from the claim text.