Tool driving or impacting – Impacting devices
Patent
1990-06-29
1993-08-24
Rosenbaum, Mark
Tool driving or impacting
Impacting devices
173128, 173206, 405184, B25D 900
Patent
active
052380726
ABSTRACT:
In a rammer for internal ramming of pipes, having its rear end connected with the rear end (viewed in the direction of advance) of the driven pipe, the application of the driving force is improved by a mechanically simple connection.
REFERENCES:
patent: 4460050 (1984-07-01), Schmidt
patent: 4650374 (1987-03-01), Schmidt
patent: 4671703 (1987-06-01), Schmidt
Fridie Jr. Willmon
Paul Schmidt
Rosenbaum Mark
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