Fishing lure

A fishing lure comprises a flexible lure body having a preformed cavity therein. The cavity has a leading end and a trailing end, and the lure body has an insert opening through the exterior thereof into the cavity. An insert mounted in the cavity is selectively removable therefrom through the insert opening. The insert has a leading end disposed adjacent the leading end of the cavity and a trailing end disposed adjacent the trailing end of the cavity. The insert is either preformed with or forcibly malleable to assume a configuration differing from that assumed by the cavity in a relaxed condition without said insert therein. The insertion of the insert into the cavity will thus cause deflection of the lure body in a direction from the leading end to the trailing end and alter the external configuration of the lure body.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention pertains to fishing lures. In the past, most lures 
have been made either of metal or of a rubber-like or plastic material. 
Rubber-like and/or plastic materials are preferred by many fisherman 
because of the versatility they offer in providing many different types of 
lures and lures which more nearly resemble the natural prey of various 
fish. For example, the formation of lures from plastic materials not only 
permits the use of many different colors for various lures, but also 
permits the production of individual lures having different colors on 
different parts thereof. These effects can be achieved either by properly 
coloring the plastic material from which the lure is to be formed and/or 
by painting the exterior of the lure body, but would be more difficult if 
the lure body were comprised of metal. Furthermore, because molded plastic 
bodies having intricate configurations can be produced much more cheaply 
than like bodies of metal, it becomes practicable, with the use of 
plastics, to form lure bodies whose external configurations fairly 
accurately represent those of a small fish, worm, shrimp, or other natural 
prey. By way of comparison, metal lures are more typically produced in 
fairly simple shapes, such as that commonly known as a "spoon." Likewise, 
the use of various plastics permits different lure bodies to be formed 
with varying degrees of other qualities such as translucence, 
fluorescence, etc. 
Although plastic lures have numerous advantages described above, they also 
have several drawbacks. One of these is that they are often too light in 
weight to provide the desired action as they are played in the water. 
Another is that, with the fish hook attached to one end or side of the 
lure body and the line attached to the other, the lure body may break or 
tear away in use due to the relative weakness of the material of which it 
is formed. This is particularly true of the relatively soft or flexible 
plastics or other rubber-like materials commonly used in the manufacture 
of shrimp or worm type lures. For these reasons, many fishermen continue 
to use metal lures for the sake of their greater weight and strength. 
Still another disadvantage with any conventional lure, regardless of the 
material of which it is formed, is that its weight and configuration are 
fixed. Accordingly, a fisherman wishing to have the capability of varying 
the lure weight, appearance or action must carry a relatively large 
assortment of separate lures. Additionally, since each of these lures has 
one or more hooks, they tend to become entangled. Furthermore, as 
previously mentioned, the plastic lures may be relatively light and are 
therefore limited to relatively large sizes, since a relatively small lure 
formed entirely of plastic would be unduly light in weight. Conversely, 
with many of the preferred metal materials, the lure body may be limited 
to a relatively small range of sizes, since larger lures formed of such 
metals would be entirely too heavy. 
2. Description of the Prior Art 
Various schemes have been devised for dealing with the above problems. 
However, in general, these have dealt with only one or another of the 
aforementioned disadvantages, and have failed to address others, and/or 
have introduced new problems of their own. For example, U.S. Pat. Nos. 
2,708,806 to Siebert, 2,787,075 to Baum and 3,395,480 to McPherson 
disclose lures having upper and lower layers formed of different 
materials. Such lures attempt to combine various qualities of metal and 
plastic, such materials being used in the different layers respectively. 
However, the means by which these layers are joined to each other render 
these lures relatively expensive. Furthermore, the weight, appearance, and 
action of each such lure are still fixed or unchangeable. 
U.S. Pat. No. 3,305,964 to Wieszeck discloses a plastic lure body having 
metal members embedded therein. While such a structure may have increased 
weight and/or strength, as compared with lures formed of plastic only, it 
is likewise relatively expensive to manufacture, and its features are 
fixed. 
U.S. Pat. No. 3,289,345 to Reininger et al discloses a sleeve which can be 
emplaced over a conventional spoon type lure to compensate for wearing of 
the finish on the exterior of the lure and/or to change its color. 
However, in this structure, the sleeve is a relatively thin-walled cover 
which simply parallels the general external configuration of an already 
existing lure body. Thus, such configuration, as well as the weight of the 
lure, are pre-determined and generally fixed by such existing lure. 
French Pat. No. 1,509,103 to Masson, U.S. Pat. Nos. 3,108,390 to Knight, 
4,266,360 to Smith, 3,490,165 to Thomassin, and 3,971,152 to Husson, Jr. 
all disclosed multi-part lures in which an insert or other separable part 
is interfitted with a lure body. However, all of these arrangements still 
suffer from lack of versatility in that there is no provisions for 
altering the configuration of the lure body and/or its action as it is 
played in the water. Rather, the external configuration, whether rigid or 
flexible, is essentially fixed and unalterable. 
SUMMARY OF THE INVENTION 
The present invention provides a high degree of versatility with a flexible 
lure body having a preformed cavity therein, the cavity having a leading 
end and a trailing end. An insert opening extends through the exterior of 
the lure body into the cavity. An insert is selectively mountable in and 
removable from the cavity through the insert opening, the insert--like the 
cavity--having leading and trailing ends. The insert may either be 
preformed to a configuration differing from that assumed by the cavity in 
a relaxed condition (without the insert therein) and/or may be manually 
malleable to such configuration. In any event, the presence of the insert 
in the cavity will cause deflection of the lure body in a direction from 
the leading end to the trailing end and alter the external configuration 
of the lure body. 
By utilizing various inserts, and/or by bending the inserts to various 
configurations, the user can achieve a number of different lure 
configurations with only a single lure body. This not only alters the 
external appearance of the lure, but will also alter its action in the 
water. 
Another advantage is that the present invention provides for a highly 
sophisticated or intricate lure configuration without unduly onerous or 
expensive manufacturing procedures. For example, the lure body can be 
molded from a suitable plastic or the like, and a mold part will occupy 
the space to form the cavity during the molding process. To permit easy 
removal of this mold part after molding, the cavity must, as a practical 
matter, be designed with a fairly simple geometry, and in particular, must 
be substantially straight in its major lengthwise direction. The insert, 
on the other hand, typically formed of a more rigid material than the lure 
body, which material is nevertheless malleable, e.g. a suitable metal, may 
be cheaply pre-formed or bent by the user to a non-rectilinear, i.e. 
curved or angular, configuration, along its length. Then, when the insert 
is emplaced in the lure body cavity, a fairly sophisticated configuration 
is achieved by virtue of the consequent deflection of the lure body, 
although the lure body itself and its insert may be, individually, 
relatively simple in configuration. Furthermore, by changing inserts 
and/or by bending one insert, the user may achieve any number of such 
fairly sophisticated or intricate configurations with the same basic lure 
body. 
More specifically, the lure body may include a central portion defining the 
cavity and a plurality of appendages extending from the central portion, 
with the insert serving to cause not only deflection of the central 
portion but also flexing of the appendages. 
As mentioned, the lure body is preferably formed of a suitable plastic or 
similar material. Thus, even in its relaxed condition, without the insert, 
it can be provided with a more realistic external configuration than plain 
metal lure bodies. Then, by insertion of an insert in accord with the 
present invention, the external configuration, and consequently the action 
of the lure in the water, can be even further modified and sophisticated. 
At the same time, the insert can be used to add weight to the lure as a 
whole and by utilizing inserts of different weights, the action of the 
lure in the water can be modified in still another way. Additionally, the 
insert preferably comprises a means defining an eyelet generally adjacent 
its leading end and means for carrying at least one fish hook adjacent its 
trailing end. Thus, because the line may be attached to the eyelet on the 
insert, and the fish hook is also carried by the insert, forces exerted on 
the lure in use are borne primarily by the insert, rather than by the lure 
body. The insert, or at least the portion thereof carrying the hook and 
line, is, as mentioned, preferably formed of a relatively strong material 
such as metal. Thus, there is little chance of the lure body tearing away 
in use, even though it may be formed of a relatively soft and flexible 
material. 
In addition, even if one such insert basically parallels the unflexed 
configuration of the cavity, that insert--being sufficiently rigid to 
resist deformation in normal use--will support the relatively flexible 
lure body in a desired, e.g. straight line, configuration. This can also 
help to restore a desired configuration to a lure body which has become 
deformed by crushing between other objects in the tackle box, heat, etc. 
Lures according to the present invention may be provided in kits, each kit 
including at least one lure body and a plurality of inserts. The inserts 
may be of varying configurations and/or weights in order to permit the 
lure to be altered as described above. Such a kit could also be provided 
with a plurality of lure bodies interchangeable on the various inserts. 
Where such lure bodies are provided with different appearances, e.g. 
variations in color, shape, flexibility, etc., even greater versatility is 
provided with relatively few distinct parts. 
Accordingly, it is a principal object of the present invention to provide 
an improved fishing lure. 
Another object of the present invention is to provide a flexible lure body 
with a removable insert for altering the external configuration of the 
lure body. 
Still another object of the present invention is to provide a fishing lure 
kit including a plurality of such inserts interchangeable on at least one 
lure body. 
Still other objects, features, and advantages of the present invention will 
be made apparent by the following detailed description, the drawings, and 
the claims.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring now to FIGS. 1-3, there is shown a first embodiment of the 
present invention. The lure of FIGS. 1-3 includes a lure body 10 molded of 
a relatively flexible or rubber-like resin or plastic. The outer surfaces 
of body 10 define the overall external size and general configurational 
type of the lure as a whole. In the embodiment shown, the configuration 
type thus defined by body 10 is generally that of a modified spoon. More 
specifically, when viewed in plan as in FIG. 1, such configuration 
includes a generally ovoid profile. As best seen in FIG. 2, the external 
configuration of body 10 further includes a thickened central rib portion 
10a extending along the length of body 10 and a pair of flap-like 
appendages 10b extending lengthwise along opposite sides of rib portion 
10a. Appendages 10b are directed laterally outwardly from rib 10a in 
opposite directions. Also as shown in FIG. 2, the surfaces defining 
appendages 10b are concave along the upper face of body 10, and convex and 
continuous with the adjoining surface of rib portion 10a along the lower 
face of body 10. 
Body 10 further includes inner surfaces defining a cavity 12 extending 
generally lengthwise through body 10. Cavity 12 is substantially smaller 
than the external size of body 10 and of substantially different 
configuration than the external configuration of body 10. More 
specifically, cavity 12 has a simple elliptical transverse cross-sectional 
configuration and is substantially straight in the lengthwise direction 
(in a relaxed condition without insert 18 therein). The width of cavity 
12, as shown in FIG. 1, is smoothly tapered or graduated along its length. 
As shown in FIG. 3, the depth of cavity 12 is generally uniform. 
The wide end of cavity 12 is the trailing end thereof, and the narrow end 
is its leading end. Since cavity 12 extends lengthwise through body 10, 
the leading and trailing ends of the cavity 12 correspond respectively to 
the front and rear ends of body 10. Body 10 has an insert opening 14 
extending from its exterior endwise into the trailing end of cavity 12. 
Body 10 also has a pair of aligned access openings 16 extending 
transversely into the leading end of cavity 12. 
The lure also includes an insert 18 formed of a relatively strong rigid 
metal. The insert 18 is removably mounted in cavity 12 by inserting it 
through insert opening 14. The length of insert 18 corresponds generally 
to that of cavity 12 as does its elliptical transverse cross-sectional 
configuration. The width and thickness of insert 18 are substantially 
equal to but slightly smaller than the corresponding dimensions of cavity 
12 (the width of insert 18 being tapered from one end to the other to 
correspond to the taper of the cavity) so as to permit insertion of insert 
18 into cavity 12 while still providing a relatively snug mating fit. 
However, while cavity 12, in a relaxed condition with insert 18 removed 
therefrom, would either be straight or limp when viewed from the side, 
insert 18 is slightly concave upwardly. Henceforth herein a cavity will be 
considered "straight" whether the lure body is sufficiently rigid to 
maintain a straight cavity configuration (in the absence of an insert) or 
if, while technically formed straight, it falls limp under its own weight. 
Thus, when insert 18 is inserted into cavity 12, body 10 will flex in the 
direction from leading to trailing end to allow cavity 12 to follow the 
curvature of insert 18. More specifically, not only is there deflection of 
central portion 10a but also flexing of appendages 10b (see FIG. 3). 
Accordingly, while body 10 may be easily molded with relatively simple 
apparatus, including a straight mold piece for defining cavity 12, a 
fairly sophisticated configuration is ultimately achieved through the use 
of insert 18. 
Insert 18 has a relatively narrow leading end received in the leading end 
of cavity 12. An eyelet 20 through said leading end of insert 18 is 
positioned for alignment with access openings 16 so that the fishing line 
can be passed through openings 16 and eyelet 20 for securing the lure to 
the line. Insert 18 also has an aperture 22 through its wide or trailing 
end for carrying a fishhook 26 via a small link ring 24 interconnecting 
hook 26 and aperture 22. As shown in FIG. 1, body 10 is cut away adjacent 
insert opening 14 to expose the rearmost portion of insert 18 in which 
aperture 22 is formed. This facilitates changing of hook 26 without 
disassembly of the lure. 
Insert 18 adds desired weight to the plastic body 10 in which it is mounted 
while also adding support to the relatively flexible lure body along its 
central rib portion 10a. Furthermore, since the line and hook are engaged 
with insert 18, the major portion of the forces exerted on the lure in use 
are borne by the relatively strong insert 18, rather than by the 
relatively soft flexible body 10. Thus, there is little chance of body 10 
tearing away in use. The snug fit of insert 18 in cavity 12, together with 
the mating tapers of insert 18 and cavity 12 laterally outwardly from 
their leading to their trailing ends, keeps the two members properly 
assembled as the lure is pulled through the water by its leading end. The 
two members, i.e. body 10 and insert 18, are further secured together by 
the line when it is passed through openings 16 and eyelet 20. 
Should the user desire to change the weight of the lure as a whole, this 
can be done by removing insert 18 from cavity 12 and replacing it with a 
similar insert having the same configuration but formed of lighter or 
heavier material(s) as needed. Due to the flexibility of body 10, 
interchangeable inserts can likewise be used to effect variations in the 
external configuration of the lure body. As previously mentioned, insert 
18 is slightly concave upwardly. FIG. 4 shows a similar insert 18' having 
dimensions along its length, width, and thickness, substantially equal to 
those of insert 18, but differing in configuration in that it has a 
sigmoid curvature when viewed from the side. FIG. 4 illustrates the manner 
in which body 10 would flex to accommodate such curvature when insert 18' 
is inserted in cavity 12 and the difference in external appearance which 
would be obtained thereby. Such change of external configuration will also 
change the action of the lure in the water. The external appearance could 
further be altered by inverting insert 18 or 18' with respect to body 10, 
or by replacing body 10 with a similar body having a cavity sized to mate 
with insert 18 or 18' but differing in external appearance from body 10, 
e.g. in color or general external profile. 
FIGS. 5-9 illustrate a second embodiment of the invention. FIGS. 5 and 6 
show the flexible lure body 30 which includes a central portion 30a 
extending lengthwise along the major dimension of the lure body and a pair 
of flap-like appendages 30b extending lengthwise along opposite sides of 
central portion 30a and integral therewith. As best seen in FIG. 6, 
appendages 30b are directed generally tangentially with respect to central 
portion 30a (as compared to the laterally directed appendages 10b of the 
first embodiment) and in the same general direction, i.e. upwardly as 
viewed in the drawings. Although appendages 30b are generally parallel to 
each other, they may be flared slightly away from each other as shown in 
FIG. 6. When viewed from the side, as in FIG. 5, the appendages 30b, 
together with the adjacent central portion 30a, define the general 
configuration simulating a small fish. This simulation can be enhanced 
with features such as eyes 32, gills 34 and fins 36 molded into and/or 
painted on the outer sides of the lure body. 
Lure body 30 has a cavity 38 extending lengthwise through central portion 
30a. Cavity 38 has a fairly simple geometry, being straight in the 
lengthwise direction and having a generally rectangular cross-sectional 
configuration. The depth of recess 38 (measured in the vertical direction 
as shown in the drawings) is substantially uniform, while the width of the 
recess has a slight taper, similar to that of the preceding embodiment, 
the narrower end of the recess being forwardmost. Near the forward end of 
recess 38, central portion 30a has aligned bores 40 and 42 communicating 
with cavity 38 from above and below. The rear end of recess 38 opens 
through the lure body to provide an insert opening 38a. 
FIGS. 7 and 8 show one metal insert 44 adapted for use with the lure body 
of FIGS. 5 and 6. It can be seen that the major lengthwise dimension of 
the lure body 30 corresponds to the direction from the leading to the 
trailing end of cavity 38. Insert 44 is similarly elongated and sized and 
shaped for receipt in cavity 38. More specifically, as shown in FIG. 7, 
insert 44 is of substantially uniform thickness, while as seen in FIG. 8, 
the width of insert 44 is tapered from a narrow leading end to a slightly 
wider trailing end. Insert 44 is not, however, straight in its lengthwise 
direction, as is cavity 38 in a relaxed condition, but rather is curved so 
as to be concave downwardly, as shown in FIG. 7. 
Insert 44 is formed of a metal which is more rigid than the material of 
lure body 30 so that, when insert 44 is inserted in cavity 38, the lure 
body will be deflected as shown in FIG. 9. This not only causes the fairly 
simple molded body 30 to assume a more sophisticated configuration, but 
also determines the action of the lure in the water. 
With the insert in place, a bore 46 in the leading end of insert 44 is 
aligned with bores 40 and 42 in the lure body to permit attachment of a 
fishing line to the lure. The trailing end of insert 44 has a bore 48 
therethrough, and when the insert is in place as shown in FIG. 9, the 
trailing end of the insert protrudes through insert opening 38a to at 
least partially expose bore 48. Bore 48 is used for attachment of one or 
more fish hooks to the insert and may also be used to grip the insert for 
removal. As in the preceding embodiment, with the fishing line and fish 
hook or hooks being attached to opposite ends of the insert 44, the forces 
on the lure in use are borne primarily by the metal insert 44, whereby the 
softer lure body 30 is protected from tearing or similar damage. 
FIGS. 10 and 11 show additional inserts which can be used with lure body 30 
in place of insert 44. Each of these inserts will cause the lure body to 
be deflected in the direction from the leading to the trailing end in a 
different manner from that shown in FIG. 9, thereby altering the 
configuration of the lure body. In the insert 50 shown in FIG. 10, the 
leading end is curved downwardly, with the trailing end being 
substantially straight. Bores 52 and 54 are provided through the leading 
and trailing ends respectively for attachment of the fishing line and fish 
hook. The insert 56 shown in FIG. 11 has a straignt leading end with its 
trailing end deflected angularly downwardly. Again, bores 58 and 60 are 
provided for attachment of the fishing line and fish hook respectively. 
For most fishermen, it is preferable that the various inserts for use with 
any given lure body be pre-formed to the appropriate configuration for 
determining a given type action of the lure in the water. However, some 
users prefer to be able to adjust the nature and degree of deflection on 
their own. For this purpose, one or more of the inserts can be made of a 
metal which, while significantly more rigid than the material of the lure 
body, is forcibly manually malleable, either before or after insertion 
into the lure body. Various steels and steel alloys are suitable. 
In either of the preceding embodiments, lure bodies can be formed of any 
number of resinous or plastic materials possessing sufficient flexibility. 
Examples include vinyls, acrylics, polyurethanes, thermoplastic 
elastomers, nylon, and various synthetic as well as natural rubbers. The 
choice of material for the lure body will depend upon the precise 
characteristics desired. 
Lures according to the present invention can advantageously be provided in 
kits each including a plurality of interchangeable inserts with one or 
more lure bodies. Such a kit might include body 10 and inserts 18 and 18'. 
Another might include body 30 and two or more of inserts 44, 50 and 56. 
These examples are similified, and it can be seen that the advantages in 
terms of versatility are enhanced where more bodies and/or inserts are 
provided in a given kit. For example, bodies generally of the modified 
spoon type exemplified by body 10 and the fish type exemplified by body 30 
could be adapted for use with a common set of inserts. Each kit might 
include one insert which is straight in the lengthwise direction so that 
it will support but not flex the lure body. 
Numerous modifications of the exemplary embodiments shown above are 
possible. For example, some inserts might be provided with means for 
attaching the fishing line at slightly different distances from the 
extreme leading end. More specifically, an insert could be provided with 
one or more bores such as shown at 46, spaced lengthwise along the leading 
end of the insert and/or a plurality of raised loop type eyelets extending 
upwardly from the upper surface of the insert and likewise spaced along 
its leading end. In any event, it will be understood that the 
corresponding lure body would be provided with suitable openings or 
cutaway areas to allow access to any of the eyelets desired. Attachment of 
a fishing line at slightly different points, as thus permitted, provides a 
further means of altering the action of the lure in the water. Numerous 
other changes in the precise configurations of the lure bodies and inserts 
could be made within the spirit of the invention. Accordingly, it is 
intended that the scope of the invention be limited only by the claims 
which follow.