Safety measures for lifting slings
AssigneeFrenolink Förvaltnings AB
InventorLars Fredriksson
Life of this patent
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Abstract
A method of providing a safety measure when lifting a load (13) by a lifting sling (10) with at least two legs (10a, 10b) connected to the load (13) at two connection points (14a, 14b). Instead of checking the inclinational angle of each sling leg, in addition to observing the working load limit (WLL), the user can check that the horizontal distance between the connection points does not exceed a Horizontal Length Limit (HLL).
Claims8
A method for providing a safety measure for lifting a load using a lifting sling coupled to a lifting device, the lifting sling having at least two sling legs connectable to a load at associated connection points and carrying the load during lifting, said method for providing the safety measure comprising the steps of:
- observing a working load limit (WLL) corresponding to a predetermined maximum value of a static force permitted for each sling leg during lifting;
- and
- observing a predetermined maximum horizontal length limit (HLL) of the horizontal distance between said connection points which will result in safe lifting of the load at or below said predetermined maximum static force which may be applied to the sling during lifting.
A lifting sling for coupling to a lifting device, said lifting sling comprising:
- at least two sling legs for connection to a load at associated connection points and carrying said load during lifting;
- and
- an associated safety indicator indicating a predetermined maximum horizontal length limit (HLL) of the horizontal distance between said connection points which for said sling will result in safe lifting of the load at or below a predetermined maximum static force which may be applied to each sling leg during lifting,
- wherein said associated safety indicator comprises a safety tag attached to said lifting sling.
- wherein said safety tag indicates said working load limit (WLL) as well as said horizontal length limit (HLL).
Dependencies are inferred from the claim text.