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Drive unit for flexshaft vibrators

  • US 4,384,224 A
  • Filed: 09/21/1981
  • Issued: 05/17/1983
  • Est. Priority Date: 05/11/1979
  • Status: Expired due to Fees
First Claim
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1. A drive motor unit for an internal vibrator or like device comprising a tubular shell of non-conductive material each end of which has a separate cover element of non-conductive material, a cylindrical structure defining a field assembly having in electrically conductive connection therewith brush means and means for coupling thereto a source of power, said field assembly having a releasable slip-fit mount within and connection to an inner portion of said shell, an armature assembly within said field assembly having in electrically conductive relation thereto commutator means, to which said brush means are applied, said armature assembly having in connection therewith shaft means, said shaft means being supported and capped at one end by one of said cover elements, the other end of said shaft means having an axial extension defined by an electrically non-conductive element mounted to extend said shaft means within the other of said cover elements, said element defining an axial extension being effective on coupling of a source of power to said field assembly to block flow therethrough from said shaft means of electrical energy and said electrically non-conductive element forming an axial extension of said shaft means providing the output from said shaft means and said motor.

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