Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Wear shield or replaceable wear sleeve
Patent
1997-03-18
1999-08-03
Bagnell, David J.
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Wear shield or replaceable wear sleeve
299107, E21C 35197
Patent
active
059315423
ABSTRACT:
A wear prevention device for use with roadmilling or trenching machine blocks which hold rotatable cutting bits. The wear prevention device includes a substantially cylindrical retainer sleeve with a longitudinally directed slot running the length of the sleeve. The wear prevention device also includes a substantially circular wear washer with a radially inwardly directed key which is adapted to fit within the sleeve slot, thereby interlocking the sleeve and the wear washer. The retainer sleeve is adapted to receive a shank of a cutting bit and is placed within a bore in a machine block. The machine block bore may further include a keyway, or the machine block may include a boss surrounding the machine block bore with the keyway The retainer sleeve may further include a radially outwardly directed key adapted to fit within the machine block bore keyway, thereby further interlocking the retainer sleeve with the machine block.
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patent: 5415462 (1995-05-01), Massa
Britzke Robert W.
King H. Alan
Bagnell David J.
Rogers Tool Works, Inc.
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