Material or article handling – Well pipe or rod racking mechanism – With slope change
Reexamination Certificate
2011-07-19
2011-07-19
Adams, Gregory W (Department: 3652)
Material or article handling
Well pipe or rod racking mechanism
With slope change
C414S022520, C414S783000, C414S742000, C052S148000, C052S167600
Reexamination Certificate
active
07980802
ABSTRACT:
A pipe handling apparatus has a supporting structure, an arm pivotally interconnected to the supporting structure such that the supporting structure and the arm are movable between a first position and a second position within a single degree of freedom, and a stiffener cooperative with the arm when the arm and the supporting structure are in the second position. The stiffener applies a mechanical resistance to the arm in the second position. The second position is at an end of the travel of the supporting structure and the arm. The stiffener applies a variable resistance to the arm as the arm moves from the first position to the second position. This variable resistance is at its greatest when the arm is in the second position.
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Adams Gregory W
Fischer John G.
Scheef & Stone LLP
T&T Engineering Services
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