Anchor bolt

Anchor bolt

  • CN 101,694,226 A
  • Filed: 09/25/2009
  • Published: 04/14/2010
  • Est. Priority Date: 05/14/2009
  • Status: Active Grant
First Claim
Patent Images

1. a crab-bolt is made up of nut, screw rod and expansion piece;

  • The outer end of screw rod has thread section and the inner end has bolt head;

    It is characterized in that;

    expansion piece in a tubular form, tube wall radially have an inflation port that plurality of rows guiding expansion piece expands distortion, form intumescent sheet between every row'"'"'s the adjacent inflation port, expansion piece is nested with on screw rod, and the inner end is against on the bolt head;

    Nut driving and is against on the outer end of expansion piece on thread section.

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