Retainer device for auger, roof and the like type bits

Details Retainer device for auger, roof and the like type bits Retainer device for auger, roof and the like type bits

1981-09-16

1984-11-06

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Miscellaneous

175410, E21B 1046

Patent

active

044808747

ABSTRACT:
A retainer device of the type for securing by brazing or the like a carbide cutter element to a drill bit body of the auger and roof type. The retainer device includes a unitary, one-piece body made from a consumable, non-ferrous brazing material defined by a base portion and an integral upstanding wing portion adapted to be disposed within a correspondingly shaped recess portion formed in the head of the tool bit. The retaining device is adapted to mount a carbide cutter element such that the cutter element is secured by brazing within the recess portion with the cutter element being exposed for a majority of its area for cutting operations.

REFERENCES:
patent: 2308569 (1941-07-01), St. Clair
patent: 3434554 (1969-03-01), Bower, Jr.
patent: 3576060 (1971-04-01), Stein
patent: 3671075 (1972-06-01), Eyre et al.
patent: 4356873 (1982-11-01), Dziak

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