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DUAL REPLACEABLE HOLESAW BIT

  • US 3,778,179 A
  • Filed: 09/06/1972
  • Issued: 12/11/1973
  • Est. Priority Date: 09/06/1972
  • Status: Expired due to Term
First Claim
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1. A dual replaceable saw element bit for use with a drill for cutting concentric holes of different diameters in a work piece, comprising:

  • a holder adapted to be fixedly connected to said drill, said holder including first and second elongated members which are longitudinally movable relative to one another from a first position to a second position and vice-versa, a first separately replaceable tubular hole saw connected to said first member and a second separately replaceable tubular hole saw concentrically disposed within said first saw and connected to said second member, said second saw being retracted within said first saw when said members are in said first position and second saw extending out of said first saw when said members are in said second position.

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