Cutlery
Patent
1980-01-09
1981-10-27
Footland, Lenard A.
Cutlery
166241, F16C 2902
Patent
active
042969735
ABSTRACT:
A segmented hardfaced collar for tool joints is disclosed. In the preferred and illustrated embodiment, a wear resistant tool joint suitably dressed for use is disclosed. It is formed at externally upset box tool joints. The apparatus comprises, in the preferred embodiment, a pair of semicircular segments which fully encircle and are joined to the lower portions of the box tool joint. The segments are perforated with a plurality of holes, and cylindrical inserts are pressed into them made of hard material to extend the life of the tool joint. The several inserts are distributed around the semicircular segments and are held in position by means of a friction fit or brazing material applied to the joint.
REFERENCES:
patent: 3978933 (1976-09-01), Olson et al.
patent: 3993368 (1976-11-01), Jurgens et al.
patent: 4043611 (1977-08-01), Wallace
patent: 4081203 (1978-03-01), Fuller
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