Bit arrangement for a cutting tool

Details Bit arrangement for a cutting tool Bit arrangement for a cutting tool

1979-04-17

1981-01-27

Purser, Ernest R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

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

175227, 175354, 299 92, E21C 3518

Patent

active

042471508

ABSTRACT:
The rotary-shaft bit (7) inserted in a bushing (3) fixedly mounted, encloses by means of a hollow-cylindrical extension (9) an annular extension (5) of the bushing (3) and projecting in axial direction of said bushing (3), and in this manner is supported closer to the tip of the bit (8) in order to absorb transverse forces, noting that the front surface (14) of the hollow-cylindrical extension (9) of the bit (7) can be supported on the flange (4) of the bushing (3) (FIG. 1).

REFERENCES:
patent: 1792604 (1931-02-01), Reed
patent: 3820848 (1974-06-01), Kniff
patent: 3833265 (1974-09-01), Elders
patent: 3841707 (1974-10-01), Kniff et al.

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