Handling: hand and hoist-line implements – Contact lens applicator
Patent
1991-09-13
1993-09-28
Cherry, Johnny D.
Handling: hand and hoist-line implements
Contact lens applicator
294 89, 410101, 403164, 248499, T16G 1508
Patent
active
052481760
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a swivel coupling device for coupling a load, e.g. by way of a chain, a wire or a strap, to a base member, e.g. a heavy object to be lifted or a lifting hook or the like, the coupling device being of the general kind stated in the preamble of claim 1.
Such a coupling device is known from U.S. Pat. No. 3,297,293, wherein the two legs of the pivotable coupling member are constituted by straight end portions, which are parallel to each other and are pivotably connectable to the central rotary member by means of separate pivot pins extending through corresponding holes in each leg end portion and attachable to the rotary member by a lock pin fitted into a vertical bore through upper and lower parts of the rotary member. Such an arrangement involves a large number of separate small parts, which have to be assembled when completing the coupling device to make it operative. Furthermore, the overall strength of the device is dependent on the strength of the relatively small lock pins holding the pivot pins in place.
A similar device is known from the German Utility Model specification G 84 28 646.6, disclosing a closed loop coupling member which is pivotably connected to a rotary member at the side thereof, i.e. laterally offset the rotary axis of the device. This will cause an additional bending moment on the device, whereby the overall strength thereof is impeded.
The object of the present invention is to provide an improved coupling device of the kind referred to initially, wherein the pivotable coupling member is pivotable at a pivot axis extending transversally through the rotary axis of the rotary member, so as to provide maximum strength and optimal operative conditions, while minimizing the number of separate parts in order to facilitate assembly of the device. Another object is to provide a coupling device enabling a large number of embodiments of the pivotable coupling member for various specific requirements of use.
These and other objects, to be discussed below, are obtained by the general features stated in the characterizing portion of claim 1.
Thus, instead of using separate pivot pins, as in above-mentioned US reference, the legs of the coupling member are bent inwards towards the other leg, so as to be pivotably journalled and lockingly received in oppositely located recesses in the rotary member. Hereby, the number of separate parts is reduced while at the same time providing a stronger pivot connection. The leg end portions can be separate from each other or integrally joined to each other (cf. claim 2).
Further advantageous features are stated in the claims 3-10.
The invention will now be described further below with reference to the appended drawings illustrating some preferred embodiments of the inventive concept.
FIG. 1 shows in a perspective view a first embodiment of the coupling device according to the invention;
FIG. 2 shows the device of FIG. 1 in a central section;
FIG. 2A shows a slightly modified form of the embodiment of FIGS. 1 and 2;
FIGS. 3-5 show in sectional side and top views a second embodiment of the coupling device;
FIG. 6 shows, in a partially sectional side view, a modified form of the second embodiment;
FIG. 7 shows in a perspective view another modification of the second embodiment;
FIGS. 8-10 show in side views alternative forms of the pivotable coupling member included in the first embodiment of the device;
FIGS. 11 and 12 illustrate, in sectional views in a larger scale, two further modifications of the first embodiment;
FIG. 13 shows, in a partially sectional side view, a further modification of the second embodiment;
FIG. 14 illustrates, in a sectional side view, a modification of the first embodiment, wherein the base member is constituted by a lifting hook; and
FIGS. 15 and 16 illustrate two further modifications of the first embodiment with the base member constituted by a lifting hook.
In the preferred, first embodiment, as illustrated in FIGS. 1 and 2, the swivel coupling device comprises three basic components, viz. an anchor
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Cherry Johnny D.
Pape Joseph D.
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