Tool driving or impacting – Drive by means reacting to rotating eccentric mass
Patent
1975-10-24
1977-08-02
Purser, Ernest R.
Tool driving or impacting
Drive by means reacting to rotating eccentric mass
175122, 13735517, E21C 500
Patent
active
040390322
ABSTRACT:
This invention relates to conduit training means and more particularly an elongated, tensioned training means for training conduits in a predetermined path.
REFERENCES:
patent: 3162253 (1964-12-01), Curtis
patent: 3500941 (1970-03-01), Rudman
patent: 3508619 (1970-04-01), Huffman
patent: 3672395 (1972-06-01), Fuetsch
patent: 3692124 (1972-09-01), Kimber et al.
patent: 3907043 (1975-09-01), Appleman
Brams J. Stewart
Favreau Richard E.
Joy Manufacturing Company
Purser Ernest R.
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