Adjustment for rock crusher

  • US 6,032,886 A
  • Filed: 03/18/1999
  • Issued: 03/07/2000
  • Est. Priority Date: 03/18/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A rock crusher comprising:

  • a conical shaped bowl, a cone mounted for oscillating movement within the conical shaped bowl, said bowl being vertically adjustable relative to the cone for crushing rock to specific sizes;

    a frame including an annular bowl support, said bowl adjustably supported within said annular bowl support for vertical adjustment of the bowl relative to the cone;

    said vertical adjustment provided by mated screw threads on said support and said bowl, the screw threads on one of the support and bowl provided by a recessed thread form that is spaced from and in non-engaging relation with the screw threads on the other of the support and bowl, and a thread producing insert seated in said thread form, said insert projecting from the thread form and into engagement with the screw threads of the other of said support and said bowl.

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