(19)
(11) EP 1 466 666 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.05.2005 Bulletin 2005/20

(43) Date of publication A2:
13.10.2004 Bulletin 2004/42

(21) Application number: 04252071.8

(22) Date of filing: 07.04.2004
(51) International Patent Classification (IPC)7: B02C 18/12, B02C 18/24, H02P 7/295
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 07.04.2003 GB 0308012

(71) Applicant: Robert Bosch GmbH
70442 Stuttgart (DE)

(72) Inventor:
  • Jordan, Christopher
    Stowmarket IP14 2RA (GB)

(74) Representative: Wright, Hugh Ronald 
Brookes Batchellor LLP, 102-108 Clerkenwell Road
London EC1M 5SA
London EC1M 5SA (GB)

   


(54) Garden shredder


(57) A garden shredder to shred garden material comprising a feeder for receiving said garden material, one or more blades for shredding said garden material received by said feeder, a series-type electric motor connected to move said one or more blades, and an electronic controller for controlling the electric motor, the electronic controller comprising an electronic circuit including means to sense the speed of rotation of the motor and means to control the speed of the motor to reduce the increase of the speed of rotation of the motor when the load applied to the motor by said one or more blades is reduced or removed In this way, when there is no or only a small amount of garden material fed to the blades, the increase of the speed of rotation of the blades and hence the noise generated is reduced.






Search report