Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1981-06-10
1983-02-15
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
16125, 16DIG15, H01M 210
Patent
active
043741886
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an electric storage battery.
It is well known to provide handles on the external surface of an electric storage battery so as to facilitate carriage of the battery. However, although various alternative types of battery carrying handle have been proposed, to date none of these have proved satisfactory, particularly for use on heavy duty lead-acid batteries for large earth moving equipment. For example, one of the earliest proposals was to use a synthetic resin rope for each carrying handle and glue the ends of the rope in respective recesses in the battery lid by means of an epoxy resin adhesive. However, this technique suffers from the disadvantage that the use of an epoxy resin adhesive to secure the ropes in place adds significantly to the time required to assembly the battery. Also, the strength of the epoxy resin bond is insufficient to allow this technique to be used in the heaviest batteries, where the handles must be able to withstand a load of about 90 Kg applied in any direction without adverse effect.
An alternative proposal, also employing synthetic resin ropes, is to thread the ends of each rope through respective, perforated lugs provided on a side or end wall of a battery box and then knot the ends of the rope so that they will no longer pass through the holes in the lugs. Again, however, this leads to an undesirable increase in the battery assembly time, since with the rope thicknesses required, knotting the ends of the rope is difficult. Moreover, with the heaviest batteries it is found that the lugs tend to shear in the region of the holes and the outermost edges of the lugs. Although this problem is theoretically soluble by sufficiently increasing the dimensions of these regions of the lugs, in practice this solution is precluded by the restrictions imposed on the maximum external dimensions of the battery container and the minimum internal volume required for the battery plates. Various proposals have been put forward in an attempt to overcome the problem of lug shearing such as, for example, increasing the depth of the lugs and hence the length of the holes, inclining the holes in the lugs at an angle to the walls of the battery box, and securing reinforcing metal plates to the outermost edges of the lugs. However, none of these proposals has proved entirely satisfactory.
An object of the present invention is therefore to provide an electric storage battery having carrying handles in which the above-mentioned disadvantages are alleviated or minimised.
Accordingly, the invention resides in a container element for an electric storage battery including a pair of carrying handles extending between respective pairs of spaced holes formed in projecting lugs on the container element, each handle including at least one strip of rope or similar flexible material passing through the associated pair of holes and joined at the ends to define a continuous loop.
The provision of the looped handles on the container element described in the preceding paragraph means that, when a battery including the element is lifted, a double thickness of said rope or other similar flexible material is available for gripping the handle. Using this arrangement with normal sized projecting lugs without any reinforcement, it is found that even the heaviest batteries can be lifted without the lugs being damaged, possibly because the looped handles spread the lifting force more evenly than conventional rope handles.
Preferably, the container element is a battery box.
Preferably, the portions of each loop extending between the associated pair of holes are held in juxtaposition so as to ensure that each handle is gripped by way of a double thickness of said rope or similar material.
Preferably, said portions of each loop are held in juxtaposition by a relatively rigid sleeve through which the portions pass and which, in use, is gripped when it is required to lift the battery.
Alternatively, said portions of each loop are held in juxtaposition by moulding a handle grip around the portions and prefe
REFERENCES:
patent: 971876 (1910-10-01), Apple
patent: 3167808 (1965-02-01), Lindenberg et al.
Campbell Stephen W.
Cragg Eric E.
Elwell Michael J.
Johnson Raymond A.
Lucas Industries Limited
Walton Donald L.
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