Retainer scheme for machine bit

Details Retainer scheme for machine bit Retainer scheme for machine bit

1985-11-21

1989-06-06

Bilinsky, Z. R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

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

175354, 175410, 299 92, E21C 3518

Patent

active

048366145

ABSTRACT:
A rotatable cutting tool of the type having a bored tool holder, a cutting bit comprising a shank depending from a head portion with first forward and second rearward retaining portions spaced by a recessed intermediate section includes a cylindrical split sleeve member which extends from said forward retaining portion to said rearward portion to both abut and protect the exposed peripheries of the retaining portions from wear while permitting free rotation of the tool bit within the tool holder.

REFERENCES:
patent: 3397012 (1968-08-01), Krekeler
patent: 3663063 (1972-05-01), Johnmeyer, Sr.
patent: 4084856 (1978-04-01), Emmerich et al.
patent: 4149753 (1979-04-01), Stoltz et al.
patent: 4201421 (1980-05-01), Den Besten et al.
patent: 4333687 (1982-06-01), Barnstorf
patent: 4484783 (1984-11-01), Emmerich
patent: 4561698 (1985-12-01), Beebe
patent: 4603911 (1986-08-01), Hindmarsh et al.

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