Tool driving or impacting – With vehicle support for drive – Drive structure moved to nonuse position for transport
Patent
1983-05-04
1985-01-29
Schran, Donald R.
Tool driving or impacting
With vehicle support for drive
Drive structure moved to nonuse position for transport
173 22, E21B 702
Patent
active
044960069
ABSTRACT:
A cylinder displaceable slide gate and power swivel for well drilling rigs and the like comprising a longitudinally extending frame having an upper end and a lower end and including a ground supported base connected to said lower end; cylinder means secured to said base and including piston means adapted for reciprocating displacement between said base and said upper end; a plurality of longitudinally extending guide means connected to said frame and substantially spanning said frame from said lower end to said upper end; said slide gate and said power swivel connected to said piston means and displaceable therewith; and, said slide gate and said power swivel associated with said guide means is disclosed herewith.
REFERENCES:
patent: 2423301 (1947-06-01), Fairchild
patent: 2617500 (1952-11-01), Cardwell et al.
patent: 2715954 (1955-08-01), Rowan
patent: 2848196 (1958-08-01), Simmonds
patent: 2852111 (1958-09-01), Fuller et al.
patent: 2956782 (1960-10-01), Mistrot
patent: 3280920 (1966-10-01), Scott
patent: 4135340 (1979-01-01), Cox et al.
patent: 4269395 (1981-05-01), Newman et al.
patent: 4290495 (1981-09-01), Elliston
Schran Donald R.
Wolfe James
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