Articulated ring for lifting loads

Handling: hand and hoist-line implements – Contact lens applicator

Reexamination Certificate

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Details

C294S089000, C403S078000, C403S164000

Reexamination Certificate

active

06293600

ABSTRACT:

The present invention relates to an articulated ring for lifting loads, in particular through the attachment of a ring or rings to the load in such a way that the longitudinal axis of the ring and the lifting direction form an angle of between 0° and 90° between them.
Articulated lifting rings are known that comprise a ring equipped with two diametrically opposed lugs, connected to the free ends of a U-shaped ring in such a way that the ring swivels around the lugs. The ring turns around one end of a stud whose distal extremity is provided with threads with which the stem is screwed into a threaded hole in the load being lifted. The hole may be located on the upper surface of the load or on its side. These articulated rings have several disadvantages that could well be improved upon.
The object of the invention is to supply an articulated ring for lifting loads, in particular through attachment of a ring or rings to the load in such a way that the longitudinal axis of the ring and the direction of lifting form an angle of between 0° and 90°, which generally results in greater stability, fewer limitations regarding the material used for the ring, and greater ease of handling.
This object is realized by the articulated ring according to claim
1
. Preferred embodiments are described in the dependent claims.
The proposed solution reduces the overhang at the point of attack of the lifting force when the articulated ring is used on the side of the load.


REFERENCES:
patent: 2748646 (1956-06-01), Harold et al.
patent: 4570987 (1986-02-01), Wong et al.
patent: 4641986 (1987-02-01), Tsui et al.
patent: 5248176 (1993-09-01), Fredriksson
patent: 5405210 (1995-04-01), Tsui

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