Drill bit end protectors

Details Drill bit end protectors Drill bit end protectors

1979-06-15

1982-04-20

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

408241R, 279 1A, 279 1S, B23B 3110, B23B 3900, B23B 522

Patent

active

043256619

ABSTRACT:
A cutting end protector is used in securing one of the cutting ends of a double ended drill bit in a drill chuck. The cutting end protector comprises a body portion contoured to mate with the inner surface of the drill chuck and adapted to receive the drill chuck pin. The body portion has a cutting end receiving face provided with a central recess for receiving the point of the cutting end and a pair of chamfered face portions diverging outwardly and forwardly from the body portion, one on either side of the central recess. The chamfered face portions are slanted in opposing directions for fitting flushly with the cutting edge trailing surfaces of the cutting end.

REFERENCES:
patent: 1079520 (1913-11-01), Shreve
patent: 1964030 (1934-06-01), Brush
patent: 3041078 (1962-06-01), Lawall et al.
patent: 3136561 (1964-06-01), McAuliffe et al.

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