Extension handle for tree top pruners

Cutlery – Cutting tools – Plural cooperating blades

Patent

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Details

302961, 151444, 16115, B25G 300, B25G 104

Patent

active

052282023

ABSTRACT:
An extension handle for a tree pruner consisted of an inner sleeve movably retained inside a connecting socket to hold a handle tube and a shear holder tube, wherein the inner sleeve has an inward flange to stop the handle tube, a plurality of raised portions adjacent to the bottom end thereof engaged into respective recessed holes on the handle tube to hold the handle tube in place, a plurality of steel balls in respective recessed holes adjacent to the top end thereof engaged into respective recessed holes on the shear holder tube to hold the shear holder tube in place. A constraining ring is mounted on a top flange on the connecting socket and retained in place by hooks to constrain the steel balls inside the respective recessed holes on the inner sleeve. The shear holder tube has a tightening up screw for fastening a tree pruner.

REFERENCES:
patent: 2228635 (1941-01-01), Magennis
patent: 2259642 (1941-10-01), Hoyt
patent: 2932047 (1960-04-01), Johnston
patent: 4154545 (1979-05-01), Pinto et al.
patent: 4440517 (1984-04-01), Potter et al.
patent: 4524484 (1985-06-01), Graham
patent: 4654971 (1987-04-01), Fettes et al.
patent: 4916818 (1990-04-01), Panek
patent: 4922577 (1990-05-01), Unger

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