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FLEXIBLE RAILWAY HOPPER CLOSURE OPERATING MECHANISM

  • US 3,712,249 A
  • Filed: 05/20/1970
  • Issued: 01/23/1973
  • Est. Priority Date: 05/20/1970
  • Status: Expired due to Term
First Claim
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1. An outlet arrangement for the discharge end of a hopper having a frame including vertical walls connected to said discharge end to form a discharge opening, a closure member slidably positioned on said frame for movement between a position closing said opening and an open position wherein said closure member is disposed to one side of said opening, for the improvement comprising:

  • actuating means including reel means rotatably mounted on said closure member for moving the same, flexible means connected to said frame, and said reel means, means for rotating said reel means to wind and unwind said flexible member on and off said reel means thereby moving said closure member to between open and closed positions, and means associated with said reel means for initially applying a maximum torque for opening said closure member at a certain speed, said torque decreasing and said speed increasing and said speed increasing during continued rotation of said reel means and opening movement of said closure member.

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