LIFTING DEVICE FOR NUCLEAR ENGINEERING

Patent · Wed Oct 12 04:00:00 EDT 1960

OSTI ID:4821703

A totally mechanical lifting device comprising a grab organ is described. This grab organ has a number of gripping elements situated at different places in its periphery, each having a forward position for engaging with the body to be lifted and a retracted position for releasing it. Means are provided for constraining these elements in the retracted or in the forward position. Preferably, the body to be lifted has a male cone-shaped handling head which during the let-down movement of the grab enters a tube mounted in the center of said grab, the tube having a funnel shaped lower extremity. The said gripping elements are suitably constituted by balls that rest in lateral openings of the tube and can be pushed in centripetal direction. These elements are held in the retracted position by a poiston sliding in the tube, the piston being moved back aginst spring action by the handling head of the body as it enters the tube. On the said tube a further tube slides, the lower extremity of which has a female cone-shaped surface so that the axial thrust imposed on this outcr tube is trans formed into the centripetal thrust imposed on the balls when this surface abuts against them; in this way the balls are made to engage in an annular recess in the handling head. In the forward position of the balls, this latter tube slides over the openings in which the balls rest to lock the balls in the forward position. (NPO)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-005454
• OSTI ID: 4821703
• Report Number(s): FR 1233492
• Country of Publication: France
• Language: English

Related Subjects

CONTROL SYSTEMS
ENGINEERING AND EQUIPMENT
JOINTS
MECHANICS
NUCLEAR PHYSICS
SERVOMECHANISMS
SURFACES
TRANSPORT
TUBES