×

Vibrator motor

  • US 5,787,587 A
  • Filed: 04/19/1996
  • Issued: 08/04/1998
  • Est. Priority Date: 04/19/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. An electric hair clipper comprisinga stationary blade fixed to a housing,a moving blade for reciprocating movement along a predetermined path adjacent said stationary blade, anda vibrator motor having a fixed magnetically permeable piece and a moving magnetically permeable piece forming a plurality of flux gap zones for substantial flux flow between said pieces, each of said flux gap zones having at least two air gaps between corresponding surfaces of said fixed and moving pieces;

  • said fixed piece being secured to said housing, said moving piece being secured to said moving blade;

    a mechanical spring system connected to said moving piece, at least one end of said mechanical spring system being secured to said housing to form a pivot point; and

    means for generating varying magnetic fields between said fixed and moving pieces,said magnetic fields passing across said air gaps within said flux gap zones, said magnetic fields and said mechanical spring system causing said moving piece to oscillate along said predetermined path such that said gap furthest from said pivot point opens further than said gaps which are closer to said pivot point;

    said flux gap zone furthest from said pivot point having at least a first primary flux pole in which a first selected surface of said fixed piece is generally perpendicular to said predetermined path, a second primary flux pole in which a second selected surface of said fixed piece is generally perpendicular to said predetermined path, and a first secondary flux pole between said first and second primary flux poles in which a third selected surface of said fixed piece is generally parallel to said predetermined path,one of said flux gap zones between said furthest gap zone and said pivot point having at least a first secondary flux pole in which a first selected surface of said fixed piece is generally parallel to said predetermined path, a second secondary flux pole in which a second selected surface of said fixed piece is generally parallel to said predetermined path, and a first primary flux pole between said first and second secondary flux poles in which a third selected surface of said fixed piece is generally perpendicular to said predetermined path, the total length of said first and second secondary flux poles of said one flux gap zone being about the same as the length of said primary flux pole.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×