Drilling and chiseling tool bit

Details Drilling and chiseling tool bit Drilling and chiseling tool bit

1988-12-23

1990-02-27

Neuder, William P.

Boring or penetrating the earth

Below-ground impact members

173131, 175300, 408226, 408714, E21B 100

Patent

active

049037854

ABSTRACT:
A drilling and chiseling tool bit includes a tool bit head, an axially extending shank and an insertion end for insertion into a drilling or chiseling device. The shank extends between the tool bit head and the insertion end and is divided into individual axially aligned members. The individual shank members are held together by a retaining member which also interconnects the tool bit head and the insertion end. The tool bit head and insertion end are rotatable as a unit and are movable axially relative to one another. By dividing the shank axially, its individual members have a higher natural frequency and afford improved transmission of impact energy. As a result, preventing the excitation of natural vibrations in individual shank members, the vibration period is shorter compared to the impact transmission time period. Accordingly, the sound radiation from the tool bit is reduced.

REFERENCES:
patent: 2524707 (1950-10-01), Koeln
patent: 4004643 (1977-01-01), Newman

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