Mining tool

Details Mining tool Mining tool

1976-01-06

1977-05-31

Purser, Ernest R.

Mining or in situ disintegration of hard material

Miscellaneous

285DIG7, 285303, 285317, 85 5B, 403108, 403328, 175354, 175374, E21C 1300

Patent

active

040266052

ABSTRACT:
An improvement in mining tools of the rotary and replaceable type which includes a retainer in the form of a double ball spring detent to provide axial retention, easy removability, and to permit ready rotation of the tool in a collet while preventing the build up and impaction of dust which will inhibit rotation or removal.

REFERENCES:
patent: 1234455 (1917-07-01), Fox
patent: 1422067 (1922-07-01), Abegg
patent: 1572142 (1926-02-01), Hood
patent: 2583786 (1952-01-01), Marzucco
patent: 2758625 (1956-08-01), Poupitch
patent: 2851295 (1958-09-01), Chaffee
patent: 3499685 (1970-03-01), Kniff

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