Material or article handling – Well pipe or rod racking mechanism – With slope change
Reexamination Certificate
2011-05-24
2011-05-24
Adams, Gregory W (Department: 3652)
Material or article handling
Well pipe or rod racking mechanism
With slope change
C166S077520, C254S030000
Reexamination Certificate
active
07946795
ABSTRACT:
A pipe handling apparatus has a base, a main rotating structural member pivotally connected to the base, a pipe handler connected to the main rotating structural member for moving a pipe from a generally horizontal orientation to a vertical orientation, and a jack connected to the pipe handler. The jack exerts a downward force in generally parallel relation to the pipe when the pipe is in the vertical orientation. The pipe handler has a gripping structure for gripping an outer surface of the pipe. The gripping structure has a stab frame. The jack is affixed to the stab frame. The jack has a piston-and-cylinder assembly positioned relative to the stab frame, and a hydraulic actuator connected to the piston-and-cylinder assembly. The hydraulic actuator is suitable for passing hydraulic fluid to the piston-and-cylinder assembly so as to move the piston-and-cylinder assembly from a retracted position to an extended position.
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Adams Gregory W
Fischer, Esq. John G.
Scheef & Stone, L.L.P.
T & T Engineering Services, Inc.
LandOfFree
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