EP 2892317 A1 20150715 - POWER TOOLS HAVING AT LEAST ONE RECIPROCATING BLADE
Title (en)
POWER TOOLS HAVING AT LEAST ONE RECIPROCATING BLADE
Title (de)
ELEKTROWERKZEUGE MIT MINDESTENS EINER HIN- UND HERGEHENDEN KLINGE
Title (fr)
OUTILS ÉLECTRIQUES COMPORTANT AU MOINS UNE LAME À MOUVEMENT ALTERNATIF
Publication
Application
Priority
- SE 2012050938 W 20120904
- SE 2013051025 W 20130903
Abstract (en)
[origin: WO2014038987A1] A power tool, such as a hedgetrimmer, comprising a motor (5), typically electric, a blade set (2, 3) comprising at least one blade (2, 3) driven for reciprocating motion by the motor (5) and a drive train (6) connecting the motor (5) to the blade set (2, 3), the drive train (6) having a coupled state in which motion of the motor (5) is coupled to the blade set (2, 3) and an uncoupled state in which motion of the motor (5) is not coupled to the blade set (2, 3), the drive train (6) being capable of sudden transition from the uncoupled state to the coupled state so as to transfer angular momentum built up in the motor (5) or the drive train (6) to the blade set (2, 3). This allows for a hammer action to be provided to the blades, so that a strong impulse, larger than the force normally exerted by the blade set can be transmitted to the blade set for particularly stubborn obstacles. The drive train may comprise a centrifugal clutch (10), arranged to engage suddenly once the rotational speed of an output shaft (7) of the motor (5) increases above a first threshold and to disengage once the rotational speed of the output shaft (7) drops below a second threshold.
IPC 8 full level
A01G 3/053 (2006.01); A01G 3/06 (2006.01); B25F 5/00 (2006.01); B26B 15/00 (2006.01); F02B 63/02 (2006.01); F16D 43/16 (2006.01)
CPC (source: CN EP)
A01G 3/053 (2013.01 - CN EP); A01G 3/062 (2013.01 - CN EP); F16D 43/16 (2013.01 - CN EP); F02B 63/02 (2013.01 - CN EP); F16D 2043/145 (2013.01 - CN EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014038987 A1 20140313; CN 104602510 A 20150506; EP 2892317 A1 20150715; EP 2892317 A4 20160525; WO 2014038998 A1 20140313
DOCDB simple family (application)
SE 2012050938 W 20120904; CN 201380046009 A 20130903; EP 13835051 A 20130903; SE 2013051025 W 20130903