Ripping tool driving apparatus

Details Ripping tool driving apparatus Ripping tool driving apparatus

1979-03-30

1981-02-24

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Floor-working

37DIG18, 172 40, 173 49, 299 14, A01B 3500

Patent

active

042523761

ABSTRACT:
A ripping tool positioned below the earth's surface is driven by the output of a vibrating, preferably, resonant, force transmitting beam which has lateral dimensions smaller than those of the ripping tool and is positioned below the earth's surface. The beam is configured to have a single resonant node when restrained from vibrating at such node and is supported so that the single node is above the earth's surface and restrained from vibrating. The output of the beam is enlarged in thickness to form a hammer.

REFERENCES:
patent: 3367716 (1968-02-01), Bodine
patent: 3633683 (1972-01-01), Shatto
patent: 3770322 (1973-11-01), Cobb et al.
patent: 3857609 (1974-12-01), Felix
patent: 3897975 (1975-08-01), Cobb et al.
patent: 4003603 (1977-01-01), Stemler et al.

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