Socket

Socket

  • CN 102,337,909 A
  • Filed: 07/16/2010
  • Published: 02/01/2012
  • Est. Priority Date: 07/16/2010
  • Status: Active Grant
First Claim
Patent Images

1. be used for a kind of needling on the back timber of coal mine underground hydraulic support frame, comprise the needling body, the needling end face, the device that is connected with hydraulic prop with the fixing structure of back timber, is characterized in that the end face of needling protrudes on the end face of back timber.Be used for a kind of needling on the bottom girder of the hydraulic support under the coal mine, comprise the needling body, the needling end face, the device that is connected with hydraulic prop with the fixing structure of bottom girder, is characterized in that the bottom surface of needling protrudes under the bottom surface of bottom girder.

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