Rotatable tool assembly

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Rolling or rotatable-type bit mount

Reexamination Certificate

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Details

C299S110000, C411S533000

Reexamination Certificate

active

06863352

ABSTRACT:
A tool assembly includes an axially symmetric tool having a tapered forward end, a radial flange, and a cylindrical shank. A retainer is fitted around the cylindrical shank, a washer is fitted around the retainer, and an O-ring is fitted over the retainer behind the washer to retain the washer thereon. When the rotatable shank is fitted into a cylindrical mounting bore of a tool holder, the O-ring prevents the washer from rotating with the tool.

REFERENCES:
patent: 3746396 (1973-07-01), Radd
patent: 4561698 (1985-12-01), Beebe
patent: 4567990 (1986-02-01), Bellio
patent: 4818027 (1989-04-01), Simon
patent: 5098167 (1992-03-01), Latham
patent: 5415462 (1995-05-01), Massa
patent: 5692350 (1997-12-01), Murphy, Jr.
patent: 5730502 (1998-03-01), Montgomery, Jr.
patent: 5931542 (1999-08-01), Britzke
patent: 6077180 (2000-06-01), Adams, Jr.
patent: 6113195 (2000-09-01), Mercier et al.

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