Steel plate screw system with universal locking screws

Steel plate screw system with universal locking screws

  • CN 102,008,348 B
  • Filed: 01/10/2011
  • Issued: 06/05/2013
  • Est. Priority Date: 01/10/2011
  • Status: Active Grant
First Claim
Patent Images

1. steel plate screw system with universal lock screw, this system comprises steel plate (1) and at least two lock screw (3) with the taper head of a nail (3-1);

  • wherein, the hole that wears lock screw (3) on steel plate (1) has at least one to be sphere hole (1-2), be embedded with the retainer ring (2) with its coupling in each sphere hole (1-2), this retainer ring (2) is threaded with the taper head of a nail (3-1) of lock screw (3), it is characterized in that, described each retainer ring (2) upper surface is provided with 3~

    5 deep gouges by middle mind-set fringe radiation symmetrical take its axis as axis of symmetry (2-2), the degree of depth of each deep gouge (2-2) is 3/5~

    3/4 of retainer ring (2) thickness, be densely covered with projection (1-1) on the inwall of described sphere hole (1-2), this projection (1-1) is hemispherical, described retainer ring (2) is made by medical Ti-50.5Ni Nitinol marmem.

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