Automatic extending device
View Patent ↗The Automatic Extending Device is an internally powered controlled automatic extension and retraction device of lengths of twelve meters or more in extended length that can support up to one hundred eighty one kilograms or more positioned on the far end away from the operator. The device is comprised of: a plurality of telescoping nested sliding extensible pole segments attached to an internally powered pole extension and retraction device comprised of a one way bearing with friction clutch; a tapered push/pull strip; a high friction drive wheel; a push/pull strip friction pinch wheel assembly; a strip guide to maintain push/pull strip location/position; and a push/pull strip spool which contains the push/pull strip when not extended into the pole. The device of the present invention does not conduct electricity, so it is safe for use in, around, and with powered lines, devices, or fixtures.
1. An Extending Device for operating on objects overhead, comprising: a housing; an extendable pole; a push/pull strip connected to and between a spool assembly and a distal end of said extendable pole to change a length of the pole; a drive intermediate said spool assembly and extendable pole to push said push/pull strip toward the distal end of the extendable pole; a pinch assembly to pinch said push/pull strip against the drive to maintain the length of the extendable pole; wherein said spool assembly comprises a one-way clutch bearing inside a turntable drive is operatively attached to freewheel as said turntable drive pushes said push/pull strip out of said spool assembly toward said distal end and to engage to pull the push/pull strip away from the distal end back into said spool assembly.
2. The Extending Device according to claim 1 wherein said pinch assembly comprises a resilient actuator or spring arranged to exert a consistent force to regulate slippage of said push/pull strip on said drive.
3. The Extending Device according to claim 2 wherein said pinch assembly comprises an external grasp to adjust said force.
4. The Extending Device according to claim 1 wherein said pinch assembly comprises a pinch wheel, said push/pull strip pinched intermediate said drive and said pinch wheel.
5. The Extending Device according to claim 1 comprising a loop belt or chain connecting said drive and said spool assembly.
6. The Extending Device according to claim 5 wherein said housing has an exposed portion to manually move said turntable drive and said spool assembly to extend and to retract said extendable pole.
7. The Extending Device according to claim 1 wherein the extendable pole comprises a plurality of nested sliding extensible pole segments arranged to slide upon urging by said push/pull strip.
8. The Extending Device according to claim 7 including at least a first segment of said extendable pole is fixed to said housing.
9. The Extending Device according to claim 8 wherein said push pull-strip is fixed to said housing when said extendable pole is fully extended and the width of said push pull-strip is substantially equal to an inner diameter of said first segment.
10. The Extending Device according to claim 7 including at least a second segment of extendable pole is connected at the distal end of the extendable pole.
11. The Extending Device according to claim 7 wherein said push/pull strip is threaded through the nest of sliding extensible pole segments.
12. The Extending Device according to claim 1 wherein said push/pull strip is tapered from where it is narrowest at the distal end of the extendable pole to widen toward said spool assembly.
13. The Extending Device according to claim 1 wherein said spool assembly comprises a spool wheel turned by said one-way clutch only when turning in reverse to wind up said push/pull strip.
14. The Extending Device according to claim 1 wherein said turntable drive comprises a manual crank to push said push/pull strip toward the distal end of the extendable pole to lengthen the extendable pole and to wind said push/pull strip into said spool assembly to retract the extendable pole.
15. The Extending Device according to claim 1 wherein said spool assembly comprises a manual crank to push said push/pull strip toward the distal end of the extendable pole to lengthen the extendable pole and to wind said push/pull strip into said spool assembly to retract the extendable pole.
16. The Extending Device according to claim 1 comprising an object holder functionally attached to said distal end of said extendable pole to operate on an object overhead held by said object holder.