Anchor bolt

Anchor bolt

  • CN 101,694,226 B
  • Filed: 09/25/2009
  • Issued: 08/07/2013
  • 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, some rows that radially have of tube wall guide the inflation port that 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;

    The inner end of expansion piece is extended and is also formed positioning strip, and positioning strip is bent to form location hook, and this location hook colludes on the bolt head of screw rod;

    Positioning strip and the location hook of corresponding expansion piece have locating slot on the bolt head sidewall of screw rod, and positioning strip and location hook are in the locating slot.

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