Pick holding arrangements

Details Pick holding arrangements Pick holding arrangements

1988-04-19

1990-12-18

Kisliuk, Bruce M.

Mining or in situ disintegration of hard material

Miscellaneous

299 86, E21C 3518

Patent

active

RE0334944

ABSTRACT:
A cutter pick assembly comprises a point attack cutter pick rotatably mounted in a pick box through a sleeve in a bore. In front of the sleeve a hardened metal thrust and seal ring is mounted surrounding the forward end of the pick shank. The ring has a front face which engages in a recess in a shoulder of the pick and the ring both supports the pick against rearwardly directed cutting forces and provides a sufficiently close fit with the pick and the pick box bore to limit passage into the bore of foreign matter that may interfere with rotation of the pick in use. The thrust ring is retained axially in the bore by a spring clip and a further spring clip holds the pick axially in the sleeve, the latter being trapped in the bore by the thrust ring.

REFERENCES:
patent: 1747907 (1930-02-01), Reed
patent: 1792604 (1931-02-01), Reed
patent: 3307645 (1967-03-01), Hildebrandt
patent: 3512838 (1970-05-01), Kniff
patent: 4201421 (1980-05-01), Den Besten et al.
patent: 4302053 (1981-11-01), Roepke et al.
patent: 4489986 (1984-12-01), Dziak

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