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US 6,371,567 B1Granted
Bit holders and bit blocks for road milling, mining and trenching equipment
AssigneeThe Sollami Company
InventorPhillip A. Sollami
Life of this patent
Estimating the term…
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AssigneeThe Sollami Company
InventorPhillip A. Sollami
Estimating the term…
An improved bit holder with its mating bit block utilizes a slight taper in the bit block bore, and a tapered shank on the bit holder that includes a second larger diameter tapered distal segment that combines with an axially oriented slot through the side wall of the bit holder shank to allow a substantially larger interference fit between the distal tapered shank segment and the bit block bore than previously know. When inserting the bit holder in the bit block bore, the distal first tapered segment resiliently collapses to allow insertion of that segment into the bit block bore. A second shank tapered portion axially inwardly of the first distal tapered portion and separated therefrom by a shoulder provides a space between the bit block bore and the second tapered shank portion until the upper ⅛ to ½ inch of the second tapered shank portion meets and again forms an interference fit with the bit block bore at a portion of the shank above a termination of the slot therethrough. The dual tapered shank allows the insertion of the bit holder in the bit block with an interference fit that provides a secure mounting of the bit holder in the bit block. Since there is no fastener to maintain the bit holder in the bit block, it may be removed from the bit block by driving the base of the bit holder out of the bit block.
A bit holder for use in road milling, trenching and mining equipment as part of an assembly including a bit, said 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 comprising:
A bit holder for use in road milling, trenching and mining equipment as part of an assembly including a bit, said 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 comprising:
A bit holder for use in road milling, trenching and mining equipment as part of an assembly including a bit, said 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 comprising:
Dependencies are inferred from the claim text.