Bit assemblies for road milling, mining and trenching equipment

  • US 7,883,155 B2
  • Filed: 08/24/2006
  • Issued: 02/08/2011
  • Est. Priority Date: 02/15/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. In an assembly for use in road milling, trenching and mining equipment including a bit, bit holder and a bit block, said bit being mountable in a first bore through said bit holder and said bit holder being mountable in a second bore through said bit block, said bit holder and bit block, in combination, comprising:

  • a single piece bit holder structure including,a bit holder front portion and a generally cylindrical bit holder shank portion extending axially rearwardly from said front portion defining an annular sidewall, an elongate slot radially through said sidewall extending axially from a distal end of said shank and terminating between said distal end and said front portion defining a C-shape portion of said shank, an outer surface of said C-shape portion providing interference with said second bore on said bit block sufficient to maintain said bit holder on said bit block during use.

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