Tool driving or impacting – Advance causing or controlling means
Patent
1993-03-19
1994-10-18
Smith, Scott A.
Tool driving or impacting
Advance causing or controlling means
173147, 173148, E21C 506
Patent
active
053559657
ABSTRACT:
A mounting apparatus for a rotational drive unit. The rotational drive unit includes a socket portion which receives a truck or carrier. Opposing engagement surfaces of the carrier are separated by a distance greater than the length of the socket. The resulting lost motion connection allows for a range of free movement of the rotational head on the carrier.
REFERENCES:
patent: 2338625 (1944-01-01), Curtis
patent: 2868508 (1959-01-01), Cowan
patent: 3684035 (1972-08-01), Wills
patent: 3692123 (1972-09-01), Gyongyosi
patent: 3721305 (1973-03-01), Mayer et al.
Herink Kent A.
Laurenzo Brian J.
Smith Scott A.
Trout Brett J.
Vermeer Manufacturing Company
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