Material or article handling – Vertically swinging load support – Grab
Reexamination Certificate
2005-09-27
2005-09-27
Lillis, Eileen D. (Department: 3652)
Material or article handling
Vertically swinging load support
Grab
C414S739000, C414S917000, C294S082230, C294S106000
Reexamination Certificate
active
06948904
ABSTRACT:
A casing slip lifter includes a frame, upper and lower lift arm assemblies, at least one air cylinder connected to a pipe that rotates to pivot the arm assemblies, and a wrap arm to which the slips are attached and which is coupled to the arm assemblies by a hinge. The arm assemblies include mutually pivotable plates, one of which may be latched to enable the arm assemblies to be raised into one of two raised positions, depending on which the lower arm assembly is locked. The higher position permits the casing lifter to be used when centralizers are installed on the casing.
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Bunn Jack
Hooper Bob
Bacon & Thomas PLLC
Chin Paul T.
Lillis Eileen D.
LandOfFree
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