Handling: hand and hoist-line implements – Hook – hoistline – or grab type – Cable and hook tackle
Patent
1983-12-05
1985-12-03
Marbert, James B.
Handling: hand and hoist-line implements
Hook, hoistline, or grab type
Cable and hook tackle
59 93, B66C 112
Patent
active
045562466
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
This invention relates to chain components and, more particularly, to a chain sling assembly.
Such chain sling assemblies include a main link to which is attached a plurality of secondary links and shackles carrying lengths of chain furnished with hook or similar components appropriate to a load to be slung.
Hitherto, it has been the practice to position the secondary links on the main links during the forming process prior to welding up either the main or the secondary link.
According to the present invention there is provided a chain sling assembly having a main link and, as secondary links, separable connector links, each connector link carrying two shackles providing connections for lengths of sling chain.
The invention will now be described, by way of example, with reference to the accompanying partly diagrammatic, drawings of the components of a chain sling assembly in which:
FIG. 1 is a portion of an elongate main link symmetric both about major and minor axes, the cross-sections at those axes being indicated;
FIG. 2 is a front elevation of a separable connector link;
FIG. 3 is a side elevation of the separable connector link;
FIG. 4 is a front elevation of a shackle;
FIG. 5 is a sectional elevation of the shackle taken on the line V--V of FIG. 4;
FIG. 6 is a front elevation of a shortening clutch;
FIG. 7 is a sectional elevation of the shortening clutch taken on the line VII--VII of FIG. 6,
FIG. 8 is a sectional plan view of the shortening clutch taken on the line corresponding to the line VIII--VIII in FIG. 7;
FIG. 9 is a front elevation of an alternative form of shortening clutch;
FIG. 10 is a sectional elevation of the alternative form of shortening clutch taken on the line X--X of FIG. 9;
FIGS. 11 and 12 are sectional plan views respectively taken on the lines corresponding to the lines XI--XI and XII--XII in FIG. 10; and
FIG. 13 is an elevation of the components connected together to form a chain sling assembly, one of connector link and associated components being omitted for the sake of clarity.
As shown in FIG. 1, the elongate main link 2 has crown portions 4 (part only of one of which is shown) of generally semi-circular form connected by parallel extending side portions 6 (part only of one of which is shown). The crown portions 4 are formed with inner and outer, circumferentially extending, flanges 8 and 10 connected by a web 12 extending parallel to a diametrical plane lying centrally of the crown portions 4 as described in our co-pending application Ser. No. PCT/GB 82/00287.
As shown in FIGS. 2 and 3, each connector link 14 includes two half-link portions 16, 18 connected together by means of a pin 20. Each half-link portion 16, 18 includes a crown portion 22, 24 respectively formed with an inner and an outer circumferentially extending flange 26, 28 and 30, 32 connected by a web 34, 36 extending parallel to a diametrical plane lying centrally of the crown portions 22, 24 and parallel side limbs 38, 40 extending from the crown. The side limbs 38, 40 have a thickness equal to that of the webs 34, 36 of the crown portions 22, 24 and progressively increase in width in the diametrical plane lying centrally of the crown portions toward hubs 42, 44 which are bored to receive the connecting pin 20. The hubs 42, 44 are of stepped form, the hubs 42 on the half-link portion 16 being cut away over an inner portion to accommodate the hubs 44 on the other half-link portion 18 which are cut away over an outer portion, thereby permitting the bores to be aligned to receive the connecting pins 20. A retaining clip 46 is positioned on the pin 20 intermediate the inner faces of the hubs 44 to retain the pin in position.
The half-link portion 16 is profiled to seat on the main link 2 with the inner surface of the half-link portion making a close fit with the main link, whilst the other half-link portion 18 is profiled to receive crown portions of two shackles 50, one of which is shown in FIGS. 4 and 5.
Each shackle 50 is formed with a pair of side limbs 52 extending from the crown portions 48
REFERENCES:
patent: 4062088 (1977-12-01), Fredriksson
patent: 4171841 (1979-10-01), Rehbein
patent: 4264097 (1981-04-01), Rehbein
patent: 4398387 (1983-08-01), Bary
patent: 4429526 (1984-02-01), Rehbein
Marbert James B.
Parsons Controls Limited
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