Shaftless helical blade

Shaftless helical blade

CN
  • CN 201,553,467 U
  • Filed: 12/03/2009
  • Issued: 08/18/2010
  • Est. Priority Date: 12/03/2009
  • Status: Active Grant
First Claim
Patent Images

1. Shaftless spiral blade, one side of described Shaftless spiral blade is an acting face, opposite side is the back side, acting face links to each other with the inboard side in the back side and forms inner ring surface, the distolateral formation outer ring surface that links to each other outside acting face and the back side, it is characterized in that:

  • the thickness of inner anchor ring one side of described acting face passes through auxiliary transition face transition greater than the thickness of outer anchor ring one side between inner ring surface limit eaves and outer ring surface limit eaves.

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