Patent · US Active

Electric pole pruner

US11723313B2 · kind B2 · utility

0Cited by

6References

13Claims

0Family size

Assignee

Fiskars Finland Oy Ab · FI

Inventors

Olavi Linden · Karis, FI
Jan Lindén · Helsinki, FI

Key dates

Filing date	Aug 20, 2020
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Aug 20, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB26B29/063
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An electric pole pruner having a spring returned cutting head and equipped with a drive unit having an electric motor coupled to a drum via an epicyclic gear assembly is configured to reduce rotation speed and to increase torque. A string element is coupled to the drum of the drive unit, and to the cutting head so as to actuate the cutting head. The pole pruner further includes a locking arrangement to selectively lock or release a ring gear of the gear assembly so as to convert rotation of the electric motor into rotation of the drum when the ring gear is locked, and to convert rotation of the drum into rotation of the ring gear when the ring gear is released.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.