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Toothbrush with a brush head moved by an electromotive drive means

  • US 5,214,819 A
  • Filed: 10/04/1991
  • Issued: 06/01/1993
  • Est. Priority Date: 04/07/1989
  • Status: Expired due to Fees
First Claim
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1. A toothbrush comprisingelectromotive drive structure,brush head structure,drive structure between said electromotive drive structure and said brush head structure for coupling said electromotive drive structure to said brush head structure in driving relation, said drive structure including mechanical torque limiting structure that comprises a first coupling half with annular inner peripheral wall surface structure of elliptical configuration, anda second coupling half cooperating with said first coupling half and including cam follower structure, and spring structure for biasing said cam follower structure against said annular inner peripheral wall surface structure of said first coupling half for limiting transmission of torque by said drive structure to said brush head structure.

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