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DC powered surgical handpiece having a motor control circuit

  • US 5,136,220 A
  • Filed: 06/27/1991
  • Issued: 08/04/1992
  • Est. Priority Date: 06/27/1991
  • Status: Expired due to Term
First Claim
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1. A surgical handpiece, comprising:

  • a motor energizable for moving a tool member;

    an electrical energy supply means actuable for energizing said motor;

    manually actuable trigger means actuable for requesting motor operation;

    control means actuable by said manually actuable trigger means for energizing said motor from said electric energy supply means, said control means including a plurality of motor drive terminals actuable for providing motor drive signals suitable for full wave motor operation, said plurality comprising first half wave motor drive terminals and second half wave motor drive terminals, said first terminals being interconnected for running said motor in a half wave mode in response to actuation of said manually actuable trigger means;

    brake actuating means connected to said second half wave motor drive terminals and responsive to cessation of said motor drive signals for producing a braking signal;

    braking means responsive to said braking signal for braking said motor.

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