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Gyratory crusher having dynamically adjustable stroke

  • US 5,718,391 A
  • Filed: 10/15/1996
  • Issued: 02/17/1998
  • Est. Priority Date: 10/15/1996
  • Status: Expired due to Fees
First Claim
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1. A gyratory crusher for crushing material, comprising:

  • (a) a frame structure;

    (b) an eccentric member having a first mounting arrangement configured to rotatably mount said eccentric member to said frame structure about a vertically oriented first axis;

    (c) a main shaft having a second mounting arrangement configured to rotatably mount said main shaft to said eccentric member about a substantially vertically oriented second axis angularly offset from said first axis;

    (d) a crusher head mounted to said main shaft;

    (e) drive means for rotating said eccentric member about said first axis; and

    (f) stroke adjusting means for selectively continuously adjusting said angular offset of said second axis relative to said first axis such that productivity of said crusher is also selectively continuously adjustable, wherein said stroke adjusting means is substantially axially fixed along said first axis.

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