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Title: Pipe lifting hook having clamp assembly

Abstract

A pipe lifting hook is provided having a generally ''C'' shaped hook member having an elongated lower portion being insertable within the end of a joint of pipe and having an upper portion positionable above the pipe and provided with lifting connection means. The hook member is frictionally clamped to the pipe by grip shoe means that is movably supported by the upper portion of the hook member and is selectably movable from a released position out of contact with said pipe to a locked position in frictional locking engagement with the outer surface of the pipe. A ratchet mechanism couples said grip shoe means to the upper portion of the hook member and is manually positionable to lock said grip shoe means at said locked position or release said grip shoe means for movement toward said released position thereof.

Inventors:
Publication Date:
OSTI Identifier:
6506368
Patent Number(s):
US 4453758
Assignee:
EDB-84-177570
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 3 Dec 1981; Other Information: PAT-APPL-327128
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; DRILLING RIGS; MATERIALS HANDLING EQUIPMENT; DESIGN; PIPES; HOISTING; GRABS; MATERIALS HANDLING; OFFSHORE OPERATIONS; EQUIPMENT; 420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)

Citation Formats

Codner, J.A. Pipe lifting hook having clamp assembly. United States: N. p., 1984. Web.
Codner, J.A. Pipe lifting hook having clamp assembly. United States.
Codner, J.A. Tue . "Pipe lifting hook having clamp assembly". United States. doi:.
@article{osti_6506368,
title = {Pipe lifting hook having clamp assembly},
author = {Codner, J.A.},
abstractNote = {A pipe lifting hook is provided having a generally ''C'' shaped hook member having an elongated lower portion being insertable within the end of a joint of pipe and having an upper portion positionable above the pipe and provided with lifting connection means. The hook member is frictionally clamped to the pipe by grip shoe means that is movably supported by the upper portion of the hook member and is selectably movable from a released position out of contact with said pipe to a locked position in frictional locking engagement with the outer surface of the pipe. A ratchet mechanism couples said grip shoe means to the upper portion of the hook member and is manually positionable to lock said grip shoe means at said locked position or release said grip shoe means for movement toward said released position thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 12 00:00:00 EDT 1984},
month = {Tue Jun 12 00:00:00 EDT 1984}
}
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  • This patent describes a reconstitutable fuel assembly including at least one guide thimble having an upper end portion and a top nozzle subassembly having a lower adapter plate with at least one opening, and an upper hold-down plate with at least one passageway positioned above and aligned with the lower adapter plate opening. At least one hold-down spring is disposed and extends between the upper and lower plates and at least one elongated tubular hollow sleeve is disposed and extends between the upper and lower plates. The upper end portion of the guide thimble extends upwardly through the opening inmore » the lower adapter plate and has a threaded terminal end disposed above the adapter plate. The threaded terminal end of the guide thimble and an upper end extend upwardly through the passageway of the upper hold-down plate. A device is described for unfastening and lifting the top nozzle subassembly from the guide thimble of the fuel assembly, comprising: (a) at least one hollow gripper tube, the tube having an open lower end; (b) means mounting the gripper tube for vertical alignment with and insertion of its lower end portion into the elongated sleeve of the top nozzle subassembly to a position therein located above and adjacent to the threaded lower end of the sleeve; (c) force-generating means disposed within the gripper tube for rotatable movement and concurrent axial movement upwardly and downwardly within the tube and also disposed at the open lower end of the gripper tube for extension into and from the gripper tube open lower end upon axial movement upwardly and downwardly within the gripper tube.« less