Hidden fixing device for concrete door and window frame

Hidden fixing device for concrete door and window frame

  • CN 2,359,423 Y
  • Filed: 01/05/1999
  • Issued: 01/19/2000
  • Est. Priority Date: 01/05/1999
  • Status: Active Grant
First Claim
Patent Images

1. , the built-in fixing device for installing of a kind of concrete door window frame comprises doorframe and window frame (1), it is characterized in that:

  • at door and window cabinet (1) the hinge place is installed and is provided with the hole, keep nut (2) in the hole.

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