Ram boring machine

Details Ram boring machine Ram boring machine

1990-07-06

1992-03-17

Eley, Timothy V.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

279 19, B23B 4516

Patent

active

050959980

ABSTRACT:
In a ram boring machine that has a striking piston displaceable in a tubular housing, a displaceably mounted chisel passing through a housing tip has a collar by which it is guided in a bore in the housing that has a front and a rear stop limiting the stroke of the chisel, and has a shank that projects into the working chamber of the striking piston, rebounding blows are avoided by making the length of projection of the shank is smaller than the maximum stroke of the collar between the stops.

REFERENCES:
patent: 3625295 (1971-12-01), Gunning
patent: 4548278 (1985-10-01), Gidlund

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