Friction bearing assembly having a series of rings constituting

Details Friction bearing assembly having a series of rings constituting Friction bearing assembly having a series of rings constituting

1982-09-22

1985-04-30

Footland, Lenard A.

Bearings

Rotary bearing

Roller drill bit

384 95, 384273, 384292, 308DIG4, F16C 3326

Patent

active

045140979

ABSTRACT:
A friction bearing assembly for a roller cutter drill bit, comprising a first bearing member of cylindrical configuration and a second bearing member having an opening of generally circular section therein receiving the first member for enabling relative rotation of the members. A bushing is fitted between the bearing members, the bushing being of annular configuration and having an inner and an outer diameter so related to the diameter of the first bearing member and the diameter of the opening in the second bearing member as to enable the bushing to rotate relative to both members. The bushing is of width substantially greater than its thickness, and comprises a plurality of relatively thin, narrow elongate metal members, each metal member being of generally circular configuration and constituting a ring.

REFERENCES:
patent: 670382 (1901-03-01), Caldwell
patent: 1200060 (1916-10-01), Wemp
patent: 1552054 (1925-09-01), Green
patent: 3917361 (1975-11-01), Murdoch

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