Retainer device for drill bit

Details Retainer device for drill bit Retainer device for drill bit

1981-04-02

1987-12-15

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

76108A, 175418, E21B 1058, E21B 1062

Patent

active

047126264

ABSTRACT:
A retainer device of the type for securing by brazing or the like a carbide cutting element to a drill bit body of the type including head portion having a transverse slot formed therein to receive the carbide element, the retainer device including a unitary, one-piece body made from a consumable, non-ferrous brazing metal defined by a base portion and a pair of integral, oppositely disposed main portions extending upwardly therefrom and adapted to receive the carbide element therebetween. A pair of integral tab portions extend upwardly from the base portion adapted to prevent lateral shifting movement of the carbide element, and a pair of flange portions are made integral with and extend outwardly from opposed ends of the wing portions adapted to prevent lateral shifting movement of the container device when disposed in the slot in the head portion.

REFERENCES:
patent: 3415332 (1968-12-01), Bower, Jr.
patent: 3434553 (1969-03-01), Weller
patent: 3434554 (1969-03-01), Bower, Jr.
patent: 4099585 (1978-07-01), Emmerich
patent: 4356873 (1982-11-01), Dziak

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