Mine tool bit with spring loaded button retainer

Details Mine tool bit with spring loaded button retainer Mine tool bit with spring loaded button retainer

1983-04-18

1984-12-25

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...

299 92, 175354, E21B 1000

Patent

active

044899874

ABSTRACT:
A mine tool bit is retained in an open ended block with a cylindrical button insert transversely mounted in the shank of the bit, the insert having a cylindrical button extending radially outwardly from the shank and biased by a coil spring. The button must be manually depressed to insert or remove the bit from the block.

REFERENCES:
patent: 2851295 (1958-09-01), Chaffee
patent: 3331637 (1967-07-01), Krekeler
patent: 4026605 (1977-05-01), Emmerich

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