in the figures herein , unique features receive unique reference numerals , while features that are the same in more than one drawing receive the same reference numerals throughout . further , certain terms of orientation may be used , such as “ forward ,” “ rear ,” “ inner ,” “ outer ,” “ top ,” “ bottom ,” “ left ,” and “ right .” these terms are generally for convenience of reference , and should be so understood unless a particular embodiment requires otherwise . the scope of the invention is not intended to be limited by materials listed herein , but may be carried out using any materials that allow construction and operation . materials and dimensions depend on the particular application . in general the materials of the components may be metal , and selectively may be plastic , such as , in hard plastic components , lexan ® brand polycarbonate resin , all as known by one of ordinary skill in the art ( lexan is a registered trademark of general electric company corporation ). referring now to the drawings , an embodiment of a fishing lure 30 according to the present invention is shown in fig1 and fig2 . the lure 30 includes a head 32 and a rear portion 34 . the head 32 may be cylindrical and may be split 35 into two or more parts 36 , 38 longitudinally along the cylinder . a fishing line or leader 40 , in this case a metal leader , passes through the lure 30 , and specifically through an opening 42 in the head 32 . the opening 42 in the head 32 is formed by opposing recesses or grooves 44 in opposing surfaces ( only surface 46 is shown ) of the head parts 36 , 38 . although the surfaces 46 of the opposing head parts 36 , 38 are shown as flat , they could have other profiles or be hollow so long as there are some opposing surfaces that meet to cause grooves to oppose and form an opening 42 . the assembled head 32 has opposing threaded male half - cylinders 48 , 50 at the rear end ( towards a hook 52 ), which when placed together form a threaded male end . except for the threaded male end , the head 32 need not have a cylindrical outer surface , but could be any shape as selected by one of ordinary skill in the art . one or more sockets 54 may be provided in the opposing surface 46 of a head part 38 to receive one or more tabs ( not visible ) in the opposing head part 36 . the sockets 54 and tabs serve to maintain alignment of the head parts 36 , 38 . the head 32 shown may be referred to as an angled head because of the angled surface at the front of the head . a recess 56 may be provided to place a decorative eye . adhesive - backed decorative designs may also be used on the lure 30 . the rear portion 34 includes a skirt 60 , or streamers , and a skirt collar 62 . the skirt 60 includes a skirt neck 64 and a skirt body 66 . the skirt body 66 may be longitudinally split elastomeric material , as shown , or other material as known by one of ordinary skill in the art . the skirt collar 62 may be cylindrical and has a threaded female opening , or threaded bore 68 . further , the skirt collar may instead be a sleeve to which a lure body , or tail ( not shown ), for example , shaped like bait fish , may be attached . the skirt neck 64 and skirt collar 62 may have a longitudinal slit 70 through them as shown , or alternatively the slit 70 may be omitted such that the circumferences of the skirt collar and skirt neck are continuous . the skirt neck 64 is mounted to the skirt collar 62 using the resiliency of the skirt if the skirt neck is continuous , adhesive , both the resiliency and adhesive , or other means or combinations as known to one of ordinary skill in the art . this mounting may be done with the skirt 60 and skirt collar 62 off of the line or leader 40 . more than one skirt 60 may be mounted to the skirt collar 62 . to assemble the lure 30 , the assembled rear portion 34 may be placed around the fishing line or leader 40 . the skirt collar 62 and hook 52 may be sized such that the skirt collar 62 can fit over the hook 52 , but not through the central opening 42 in the head 32 . alternatively , where a slit 70 is provided , the rear portion 34 may be laterally placed around the leader 40 by passing the leader 40 through the slit 70 . the head parts 36 , 38 may then be assembled around the leader 40 to form the head 32 . then the threaded male end of the head and the threaded bore 62 of the skirt collar 62 may be screwed together , securing the head parts 36 , 38 in close and complementary registration , providing a substantially tight interface that may hold the leader 40 in place and in the opening 42 . fig3 shows the assembled head 32 and its cylindrical threaded male end 72 . fig4 and 5 show the head 32 disassembled . tabs 74 , to be received in sockets 54 ( fig2 ) are provided for maintaining alignment of the head parts 36 , 38 . the substantially flat surface 76 of the head part 36 may be seen . fig6 shows the assembled lure 30 in partial section view . the head 32 and skirt collar 62 are screwed together , and the skirt neck 64 is mounted to the skirt collar 62 . the skirt collar 62 may fit over the hook 52 . the hook 52 and rear end of the leader 40 ( end near the hook 52 ) do not fit through the opening 42 ( fig1 ) in the head 32 formed by the recessed areas 44 . the lure 30 is free to slide forward until it meets an obstruction , such as the forward end ( end away from the hook 52 ) of the leader 40 . if fishing line passes through the head 32 , the head 32 may be free to slide forward without obstruction , but will stay adjacent to the hook 52 as the result of being dragged through the water . fig7 and 8 show an alternative embodiment of a head 78 . the head 78 has two parts 80 , 82 that when assembled make an annular recess 84 surrounding a male threaded end 86 , also having two parts 88 , 90 . an annular extension 92 , including two parts 94 , 96 , surrounds the recess 84 . as shown in another embodiment of a lure 93 of fig9 , the annular recess 84 permits the skirt collar 62 to extend into the head 78 . the annular extension 92 ( one part 94 shown ) provides support to the skirt collar 62 , particularly when the skirt collar 62 is longitudinally slit and there may be a tendency for the collar 62 to open when force is applied . the annular extension 92 may prevent the collar 62 from opening . there is a variety of heads that may be provided in accordance with the present invention . for example , fig1 shows a flat head 100 with two parts 102 , 104 ; fig1 shows a cup - shaped head 106 with two parts 108 , 110 ; fig1 shows a bullet head 112 with two parts 114 , 116 ; and fig1 shows a rounded head 118 with two parts 120 , 122 . the heads could be further segmented into more than two parts . the interior of the heads may be hollow . further , to provide lateral directional control , ballast may be placed inside of a hollow head , as shown in fig1 and 15 . the head 140 is an angled head and includes two hollow halves 142 , 144 , a plate 146 , and a ballast insert 148 . the halves 142 , 144 are mirror images of each other , except one half 144 has tabs 74 while the other half has sockets 54 for receiving the tabs 74 . the exterior of the head 140 in this embodiment bulges outward , and is approximately oval - shaped longitudinally . the opposing surfaces 150 , 152 of the plate 146 and the ballast insert 148 include grooves 44 that receive a fishing line or leader . the plate also has pins 152 that are received in a groove 154 in the ballast insert 148 and straddle the groove 44 for the fishing line or leader . the pins 152 secure the fishing line or leader in the groove 44 ; such a pin and groove arrangement could also be provided in previously described heads . the plate 146 and ballast insert 148 are reciprocally received in their respective halves 142 , 144 . the ballast insert 148 is preferably metal , for example , lead or comparable material , but may also be plastic . the center of mass of the ballast insert 148 is offset from the longitudinal axis of the head 140 and lure . the ballast insert 148 causes there to be more weight on one half 144 of the head 140 than on the other half 142 , which is hollow behind the plate 146 , causing the half 144 with the ballast insert 148 to be below the other half 142 in the water . the angled face of the head 140 therefore is sideways in the water , resulting in lateral movement of the head 140 depending on which half of the head 140 the ballast insert 148 is located . this may be desirable so that the lure stays to one side or the other out of the back of a boat , avoiding the “ propeller wash ” that is the foamy water directly behind the boat , in which the line cannot be seen . in this embodiment of the head 140 the ballast insert 148 would direct the lure to the right when facing out the back of the boat . the sloped front surface 156 of the ballast insert 148 keeps the ballast insert in position , preventing rotation in the head 140 , because the ballast insert fits in complementary registration with the sloped interior surface 158 of the head half 144 . as an alternative to a plate 146 , the half 142 in which the plate is received could be solid plastic , so long as there is a difference in weight between the two halves 142 , 144 , which would be the case if the ballast insert 148 is metal . the head &# 39 ; s exterior front surface 160 should be angled or otherwise not symmetric to a plane perpendicular to the fishing line or leader in order for the head 140 to laterally direct the lure . a non - split lure head may also be provided with ballast . as with the split - head lures with ballast previously discussed , the center of mass is offset from the longitudinal axis of the lure . this results in the same effect as in a split head , where the lure location is directed depending on the placement of the ballast and the profile of the front face of the head . the lure may have the same appearance as , for example , the assembled split lures of fig3 and fig1 - 13 , with the split 35 omitted . alternatively , the lure could be any conventional shape with ballast included , with the ballast cast into the head , inserted into the head , or other design . the ballast could be placed at any desired location in the lure , such as in the head or the body . an alternative embodiment of a lure 170 is shown in fig1 . this embodiment 170 includes a mounting cylinder that is split ( with one part 172 shown ) and has a threaded male end 174 . the lure 170 also includes a skirt 60 or could include other artificial bait components , such as a body portion , or tail . the head includes a sleeve 178 that may be solid or slit to be laterally removable from the line or leader 40 . to assemble the lure 170 the sleeve 178 may be placed over the hook and leader . the mounting cylinder halves 172 may be assembled around the leader 40 and then the mounting cylinder and sleeve 178 may be screwed together , securing the mounting cylinder . the preferred lure type for given fish and conditions may be as determined by one of ordinary skill in the art . the interchangeable characteristic of the parts of the present invention allow replacement of all or part of the lure to achieve a desired combination while keeping the number of components lower than might be needed if using one - piece lures . for example , if there are six heads and six rear portions available , there are thirty - six possible combinations ; thirty - six one - piece lures would be required to match the same possibilities . specific embodiments of an invention are described herein . one of ordinary skill in the art of fishing will recognize that the invention has other applications in other environments . in fact , many embodiments and implementations are possible . for example , the interchangeable design could be applied to fishing apparatus other than lures , such as sinkers . the head could be made of several parts rather than just the two shown in the figures where the head is split . in addition , the recitation “ means for ” is intended to evoke a means - plus - function reading of an element in a claim , whereas , any elements that do not specifically use the recitation “ means for ,” are not intended to be read as means - plus - function elements , even if they otherwise include the word “ means .” the following claims are in no way intended to limit the scope of the invention to the specific embodiments described .
a fishing lure for removal in part or in whole while a hook , fishing line , and leader assembly may remain intact . the lure includes a first member that is split into two or more parts with recessed areas that form an opening to receive the fishing line or leader when the first member is assembled . the first member may be assembled laterally around the line or leader , without threading the line or leader through the opening in the first member , eliminating the need to have a free end of line or to tie line to the lure . a second member may include a skirt collar and skirt or another type of lure part , or may be a sleeve . the second member may have a bore that allows axial passage of a hook , a slit that allows lateral passage of the line , or a combination thereof .