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Air lock

  • US 4,259,032 A
  • Filed: 01/15/1979
  • Issued: 03/31/1981
  • Est. Priority Date: 01/18/1978
  • Status: Expired due to Term
First Claim
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1. An air lock for the discharge of solid particulate material from a vacuum-conveyed stream thereof while preventing the ingress of air to the stream, comprising:

  • a hollow enclosed housing,upper inlet means to said housing for receipt of said particulate material from said vacuum-conveyed stream, the lateral extremities of said inlet means being defined by first enlongate mounting means,lower outlet means from said housing for discharge of said particulate material therefrom, the lateral extremities of said outlet means being defined by second mounting means,rotor means mounted in said housing in fluid flow relationship with both said inlet means and said outlet means for transfer of said particulate material therebetween,said rotor means having a rotatable hub means and a plurality of radially-projecting rigid blade means mounted to said hub means comprising at least four angularly spaced blade means, the axis of rotation of said hub means extending generally parallel to said lateral extremities of said inlet means and said outlet means,arcuate wall means mounted on opposite lateral sides of said rotor means and having a center of curvature which is substantially the axis of rotation of said rotor means,said arcuate wall means being constructed of semirigid or rigid material and having curvilinear extremities,said arcuate wall means being flexibly mounted within said housing for engagement with the radial extremities of said blade means exposed to said vacuum,said flexible mounting for each said arcuate wall means being effected by a first flexible material strip joined to one of said first elongate mounting means and joined to the adjacent curvilinear extremity of said arcuate wall means and by a second flexible material strip joined to one of said second elongate mounting means and joined to the adjacent curvilinear extremity of said arcuate wall means.

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