(19)
(11) EP 2 524 775 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.12.2016 Bulletin 2016/50

(43) Date of publication A2:
21.11.2012 Bulletin 2012/47

(21) Application number: 12168681.0

(22) Date of filing: 21.05.2012
(51) International Patent Classification (IPC): 
B25F 5/02(2006.01)
(84) Designated Contracting States:
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 States:
BA ME

(30) Priority: 19.05.2011 US 201161487864 P
18.05.2012 US 201213475002

(71) Applicant: Black & Decker Inc.
Newark, Delaware 19711 (US)

(72) Inventors:
  • Osborne, Stephen P.
    Baltimore, MD Maryland 21208 (US)
  • White, Paul S.
    Fallston, MD Maryland 21047 (US)
  • Delcamp, Jeffrey D.
    Baltimore, MD Maryland 21217 (US)
  • Forster, Michael K.
    White Hall, MD Maryland 21161 (US)
  • Leh, Jason
    Rosedale MD 21237 (US)
  • Sterling, Brian C.
    Jarrettsville, MD Maryland 21084 (US)

(74) Representative: SBD IPAdmin 
210 Bath Road
Slough, Berkshire SL1 3YD
Slough, Berkshire SL1 3YD (GB)

   


(54) Power tool with light unit


(57) A power tool includes a motor, a light unit, and a switch unit for selectively connecting the motor and the light unit to the power source. A control module includes a controller coupled to a first electronic switch to control power delivery to the motor based on a position of the switch unit, and coupled to a second electronic switch to control power delivery to the light source based on a position of the switch unit. The controller also includes a timer configured to keep the light unit illuminated for a predetermined amount of time after the switch unit has been activated or deactivated. The control module also includes a boot circuit connected to the controller. The boot circuit includes a semiconductor switch configured to continue to deliver power to the controller and to the light unit when the switch unit is deactivated subsequent to being activated, to enable the light unit to remain illuminated after the switch unit has been deactivated.







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Search report