Power tool and mechanism

  • US RE37,905 E1
  • Filed: 12/22/1999
  • Issued: 11/19/2002
  • Est. Priority Date: 03/05/1993
  • Status: Expired due to Term
First Claim
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1. A power tool comprising:

  • a housing;

    a motor mounted in the housing and having an output shaft;

    an epicyclic gearbox mounted in the housing and having an input end mounted on the motor and an output end;

    an aperture in the housing, said output end of the gearbox being adjacent said aperture;

    a drive spindle and a torque control ring of the gearbox, which control ring, when held stationary relative to the gearbox, permits the gearbox to transmit torque to said drive spindle and which, when permitted to rotate in said gearbox, disables said torque transmission;

    an application mechanism including an actuator engaged with, and resiliently biassed towards, said torque control ring, and an adjustment element displaceable on said application mechanism to adjust the engagement of said actuator with said torque control ring;

    a chuck shaft driven by said drive spindle;

    a hammer mechanism engaged with said drive spindle and adapted to impart a superimposed oscillatory motion on the drive spindle and to said chuck shaft, said hammer mechanism including an engagement element, which engagement element in a first position thereof enables said hammer mechanism and in a second position thereof disables said hammer mechanism; and

    a nose ring rotatable on said housing about said aperture thereof which actuates both said adjustment element of the application mechanism and said engagement element of said hammer mechanism.

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