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1. EP3659759 - HAIR-CUTTING UNIT WITH CUTTER BLOCKING PREVENTION

Office European Patent Office
Application Number 18208986
Application Date 28.11.2018
Publication Number 3659759
Publication Date 03.06.2020
Publication Kind A1
IPC
B26B 19/14
BPERFORMING OPERATIONS; TRANSPORTING
26HAND CUTTING TOOLS; CUTTING; SEVERING
BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
19Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
14of the rotary-cutter type; Cutting heads therefor; Cutters therefor
CPC
B26B 19/141
BPERFORMING OPERATIONS; TRANSPORTING
26HAND CUTTING TOOLS; CUTTING; SEVERING
BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
19Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
14of the rotary-cutter type; Cutting heads therefor; Cutters therefor
141Details of inner cutters having their axes of rotation perpendicular to the cutting surface
B26B 19/143
BPERFORMING OPERATIONS; TRANSPORTING
26HAND CUTTING TOOLS; CUTTING; SEVERING
BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
19Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
14of the rotary-cutter type; Cutting heads therefor; Cutters therefor
143Details of outer cutters
Applicants KONINKLIJKE PHILIPS NV
Inventors GRASMEIJER INGMAR
VAN RAALTE MARGARITA ZWANETTE
Designated States
Priority Data 18208986 28.11.2018 EP
Title
(DE) HAARSCHNEIDEEINHEIT MIT KLINGENBLOCKIERVERHINDERUNG
(EN) HAIR-CUTTING UNIT WITH CUTTER BLOCKING PREVENTION
(FR) UNITÉ DE COUPE DE CHEVEUX DOTÉE D'UNE PRÉVENTION DU BLOCAGE DE LA LAME
Abstract
(EN)
A rotary hair-cutting unit comprises an internal cutting member (7) having cutting elements (10) with cutting edges (11), and an external cutting member (6) having hair-guiding elements (16) with counter-cutting edges (17). The co-operating edges are enclosing a shearing angle, so that during rotation a cutting edge first meets a counter-cutting edge at a radial initial-passing position. In a cross-section at said radial initial-passing position and taken perpendicularly to the radial direction, only one of the internal cutting member and the external cutting member is provided with a particular abutment geometry. Even in cases where a hair-guiding element is deeply depressed towards a rotating cutting element, the abutment geometry will be effective to push the depressed hair-guiding element and the rotating cutting element axially away from one another, so that the cutting element will pass the hair-guiding element without being blocked and without causing substantial collision damage.

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