Retainer and wear sleeve for rotating mining bits

Details Retainer and wear sleeve for rotating mining bits Retainer and wear sleeve for rotating mining bits

1982-07-22

1984-11-27

Leppink, James A.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

411508, 411 15, 299 92, 175354, E21C 2538

Patent

active

044847831

ABSTRACT:
A mining bit to be mounted for rotation in a bore of a support block or on a drill steel having a retention configuration opposite the working end. A bit shank is formed with an abutment flange at the insertion end and a recess adjacent said flange to receive flexed resilient fingers of a resilient retention ring during insertion of said ring in said bore. A fulcrum land supports an unsplit end of said ring. The resilient fingers carry an annular bulge projection which engages an annular recess in a support bore. The ring can extend the length of the retention shank to serve as a wear sleeve. With a drill steel, the retention ring is mounted on an extending insert to cooperate with a female recess in a hollow bit.

REFERENCES:
patent: Re29900 (1979-02-01), Kniff
patent: 3767266 (1973-10-01), Krekeler
patent: 3820848 (1974-06-01), Kniff
patent: 4201421 (1980-05-01), Den Besten
patent: 4368789 (1983-01-01), Orr

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