Abstract

A knife sharpener (1), comprising a first grinding drum (2), a second grinding drum (7) and a motor (13) arranged to rotationally drive either or both of the first grinding drum (2) and the second grinding drum (7). A first grinding portion (4) and a first gear (5) of the first grinding drum (2) are arranged concentrically therewith, the first grinding portion (4) having an outer diameter greater than that of the first gear (5). Correspondingly, a second grinding portion (9) and a second gear (10) of the second grinding drum (7) are arranged concentrically therewith, the second grinding portion (9) having an outer diameter greater than that of the second gear (10).

IPC Classes  ?

• B24B 3/36 - Sharpening cutting edges, e.g. of toolsAccessories therefor, e.g. for holding the tools of cutting blades
• B24B 3/54 - Sharpening cutting edges, e.g. of toolsAccessories therefor, e.g. for holding the tools of cutting blades of hand or table knives

Abstract

A grinding element (1) for a knife sharpener (7), comprising a body having a radially outwardly opening annular groove (3) extending around the whole circumference of the body (2). The annular groove (3) defines a trough (4) as a radially innermost part of the groove, and a pair of annular side surfaces (5) arranged on opposing sides of the trough (4) facing each other. Inclinations (A, B) of the side surfaces (5) with respect to a normal (N) of the central axis (AC) is less at a radially outer portion (5b) of the side surfaces (5) than at a radially inner portion (5a) of the side surfaces (5). A knife sharpener (7) having such a grinding element (1) is also concerned.

IPC Classes  ?

• B24B 3/54 - Sharpening cutting edges, e.g. of toolsAccessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
• B24B 15/08 - Machines or devices designed for grinding seat surfacesAccessories therefor for grinding co-operating seat surfaces by moving one over the other
• B24B 15/06 - Machines or devices designed for grinding seat surfacesAccessories therefor on openings of bottlesMachines or devices designed for grinding seat surfacesAccessories therefor on bottle stoppers or the like

Abstract

An electric pole pruner (1) having a spring returned cutting head (3) and equipped with a drive unit (6) comprising an electric motor (7) coupled to a drum (8) via an epicyclic gear assembly configured to reduce rotation speed and to increase torque. A string element (13) is coupled to the drum (8) of the drive unit (6), and to the cutting head (3) so as to actuate the latter. The pole pruner (1) further comprises a locking arrangement (14) configured to selectively lock or release a ring gear (11) of the gear assembly (9) so as to convert rotation of the electric motor (7) into rotation of the drum (8) when the ring gear (11) is locked, and to convert rotation of the drum (8) into rotation of the ring gear (11) when the ring gear (11) is released.

IPC Classes  ?

• B26B 15/00 - Hand-held shears with motor-driven blades
• A01G 3/037 - SecateursFlower or fruit shears having motor-driven blades the driving means being an electric motor
• A01G 3/033 - SecateursFlower or fruit shears having motor-driven blades
• B26D 5/08 - Means for actuating the cutting member to effect the cut
• F16H 1/28 - Toothed gearings for conveying rotary motion with gears having orbital motion

Abstract

22) to the second blade (21) due to a shearing force (Fi) between the second handle (22) and the second blade (21) when the shearing tool is moved from the open position towards the closed position; and due to the compressive force (Fi), the second blade (21) is driven towards the first blade (11) at the cutting edge contact point (P) for increasing the cutting capacity of the shearing tool.

IPC Classes  ?

• B26B 13/28 - Joints
• A01G 3/02 - SecateursFlower or fruit shears
• A61B 17/3201 - Scissors

Abstract

2233) driving the first blade (11) and the second blade (21) towards each other at the opposite side of the pivot (3) for increasing the cutting capacity of the shearing tool.

IPC Classes  ?

• B26B 13/28 - Joints
• A01G 3/02 - SecateursFlower or fruit shears
• A61B 17/3201 - Scissors