Abstract:
A dive fin replacement heel strap for use on open-foot pocket dive fins having a mounting device on each side of the fin to secure the fins onto a user&#39;s foot. The strap is made of an elongate elastic material and has a predetermined width (W). It has a plurality of orifices of a predetermined opening size (D), positioned on the elongate elastic material. There is a tab on the end of the elongate elastic material. The tab has a solid flexible lip around its periphery which has a width greater than W and a height greater than D. There is an indent in the upper horizontal surface and in the lower horizontal surface of the elongate elastic material adjacent to the tab. The orifices are adapted to attached to a mounting device of a dive fin. The tab is adapted to pass through a mounting device of a dive fin and to pass through an orifice and lock in place thereat.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   This application is a continuation-in-part of my application, application Ser. No. 10/176,297 filed on Jun. 18, 2002, now abandoned. 

   STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH OR DEVELOPMENT 
   None. 
   FIELD OF THE INVENTION 
   This invention relates to a new and improved universal dive fin replacement heel strap that can be used as a replacement strap on most conventional dive fins having an open foot pocket and knobs, metal pins, or female buckling system protruding from the outer sides as a means of attachment. More particularly, the invention relates to a simple, adjustable, economical heel strap that has no buckling mechanisms, and may be kept in reserve for the occasion when the straps or buckles that are supplied with the dive fins need to be replaced. This new and unique universal dive fin heel strap could be supplied separately in many bright colors or featured on new dive fins. 
   BACKGROUND OF THE INVENTION 
   Swimming has developed far beyond just a recreational sport, expanding into various occupational and military activities. This development has created a need for improvements in the devices used in the act of swimming, with the swim fin being one of the major component advancements. Swim fins increase a swimmers capability greatly on the surface, and are a necessity in the act of deep diving using open-heel dive fins. 
   There are three basic styles of fins, the full foot pocket style forming a shoe-like [generally pre-formed] foot pocket and the fixed-heel strap style, both having a variety of propulsion blades with the heel strap, or pre-formed foot pocket, as an integral part. These styles of fins have a fixed-heel strap [or pre-formed foot pocket], and must be purchased to the size of the foot of the individual that will be using them. With this style of fin the distributors must carry a large variety of sizes along with the different styles. The full foot style of fin must be discarded when one of the heel straps break. 
   The third style of fins referred to, as open heel or strap fin is adjustable to the individual using them by the means of the heel strap usually incorporating a buckle adjustment mechanism. This style of fin also has a variety of styles of propulsion blades. Adjustments in size are most commonly accomplished by the means of a buckle on one or both sides of the open heel pocket. The majority of fins of this style have a heel strap mounting knob with an enlarged head and a shank member affixed on the outer surface of either side of the foot pocket as an integral part of the fin. The heel straps are attached to these knobs by different means of attachment that generally incorporate the buckling mechanisms for adjustment, so the heel straps can be replaced if they break or no longer will tighten properly or are inadvertently lost, which is most common at the beach. Often these straps and buckles are expensive and hard to find with most distributors preferring to sell a new pair of fins, and swimmers not having the convenience of carrying a spare set of straps for their fins. The open heel or strap style of fin is most commonly used when the swimmer wants the option of wearing or not wearing the protective booties in cold water requiring the adjustment of the fin size. Another difficulty presented by the straps after a period of time is the metal buckles will cut the rubber straps at the gripping area or the metal buckles will chafe the ankles of the swimmer; or the plastic buckles can be broken or lost. 
   Several inventors have endeavored to patent new and improved heel straps for the open heel or strap style of fins but most are complicated adding to their expense, time it takes to effect a replacement, and generally retaining some form of buckling mechanism. 
   U.S. Pat. No. 5,545,067 of Giovanni Garofalo relates to swimming fins, especially the open-shoe type of swimming fin with a heel strap secured to both sides of the foot pocket, and relates more particularly to a buckle for adjustably fastening the strap to the fin. This patent typifies the conventional style of fins using the strap and buckle system. This device does not incorporate any of the unique features of the universal fin replacement heel strap, but concentrates on the leverage features of the metal buckling system. 
   U.S. Pat. No. 5,597,336 of Robert B. Evans describes a uniquely configured fin having an open instep that is secured to the foot of the wearer by a padded securement means so as to accommodate a plurality of foot sizes. The heel strap consists of an elastic loop through a heel cushion secured to the fin by the means of a bracket. This patent dwells primarily with the unique open instep concept and the fact that the fins may be manufactured from a two-piece molding system. The heel straps, though similar do not make use of the knobs found on the most common fins and has no intention of being a universal fin replacement heel strap and in particular for open-heel dive fins. 
   U.S. Pat. No. 5,607,334 of Giovanni Garofalo teaches of a swim fin equipped with a buckle for the fastening of the heel strap. The heel strap of this swim fin attaches in a similar fashion with a buckle for length adjustments to the conventional fin knobs on the sides of the foot pockets, except that this heel strap has the unique limited rotation feature requiring a radial tooth which cooperates with an abutment element on the knob to prevent the downward rotation. 
   U.S. Pat. No. 6,247,983 of Tzong In Yeh discloses an adjusting strap structure for swim fins. Although this strap structure does not incorporate a buckling system, it is designed for a specific type of swim fins, and will not fit other manufacturers swim fins in that it does not make use of the knobs on the sides of most common swim fins. 
   U.S. Pat. No. 6,227,924 of Phillip W. Miller describes a heel strap for an open heel swim fin designed to securely hold the user&#39;s foot in the swim fin, yet minimize ankle and foot movement within the heel straps. The heel strap comprises a heel pocket and set of straps with buckles to attach to the swim fins. This device makes use of a locking receptacle or buckle to attach the heel strap to the sides of the foot pocket. 
   U.S. Pat. No. 6,341,383 of Giovanni Battista Beltrani teaches of an adjustable back strap for diving and swimming equipment. Although this patent makes use of the conventional knobs and buckling attachment mechanism, it could possibly be seen as a universal swim fin strap, but it would be difficult to store a spare set because it is comprise of several types of buckling systems along with a complicated heel supporting structure. 
   In addition, other prior-art patents to Uke [U.S. Pat. No. 5,020,191], Raasch [U.S. Pat. No. 5,683,279], Lochbaum [U.S. Pat. No. 5,960,565], Kawashima [U.S. Pat. No. 6,398,604], and to Clark [GB 762,126], although solving other problems unique to swim fins, none are specifically directed to the open-heel dive fin. Moreover, none of the prior-art patents disclose the unique features and function of the present invention for use with open-heel dive fins which features permit the diver to continue a dive by using the tab ends of the present invention to attach the strap to the dive fin by inserting the tabbed ends through an orifice on the strap and to hold it or to tie it in place thereat. The present invention accordingly comprises the features of construction, combination of elements, and arrangement of parts that will be exemplified in the construction hereinafter set forth, and the scope of the invention will be indicated in the claims. 
   SUMMARY OF THE INVENTION 
   The present invention accomplishes its desired objects by creating a device that can be manufactured easily as a single elastic unit with no additional parts and can be vacuum-wrapped on small display cards. The manufacturing materials may be of an elastromeric rubbers or a variety of thermo-plastic elastomers, urethanes, or other flexible rubber-like materials, and will conform to a variety of conventional forms of manufacturing, like injection molding and casting processes. With the size and simplicity of this product it can be manufactured in many bright and striking colors to add an additional component to its unique features. 
   The simplicity of this unique device is accomplished by several features that allow the universal replacement dive fin strap to be attached to a variety of different styles of dive fins by the means of a plurality of orifices on either side of the heel area extending to both distal ends of the strap. These orifices may be in a number of different geometric shapes, rectangular, spherical, elliptical or triangular. These orifices with their predetermined shape stretch over the existing heel strap mounting knobs enlarged head, located on the shank portion on each side of the conventional dive fins or its foot pocket. 
   These universal replacement dive fin straps will come in varying lengths with each strap accommodating a number of different sizes of feet. The elastic ability of the universal replacement dive fin strap allows it to fit comfortably on the wearer no matter what size their foot is, in a similar fashion to the fixed-heel strap style of fins. The universal replacement dive fin strap will have an enlarged heel area with a textured non-slip surface next to the heel of the wearer. The heel area may be flat with a pull tab, may have the pull tab angled away from the heel or may have a ring shaped pull to assist putting on the dive fins. The heel area may also have a curved shape matching the shape of the heel of the wearer, all while remaining within the scope of this patent. 
   Similar pull-tabs or pull rings are located at the distal ends of each side of the universal replacement dive fin strap to aide in the mounting of the straps over the knob heads on the sides of the dive fins and to facilitate grasping and pulling the strap over and onto a receiving knob on the fin or to pass the tab-lip through an orifice in the strap and, once so passed through, the tab-lip structure prevents the end of the strap from passing back out. The T-like configuration secures or “locks” itself in the orifice and may be removed by pinching or bending the tab-lip structure and easing it out of the orifice. 
   The ends of the straps of Lochbaum, Yeh, Steele, Clark, and Uke [which related to snorkels] are completely different in structure and function from that of applicant&#39;s strap and further are incapable of being firmly grabbed and, as tension mounts from pulling, are incapable of aiding the user in maintaining the user&#39;s grip on the end. Each end of these prior-art straps, except for Clark and Uke, are flat and provide no structural assistance to the user when so pulling. The lip of Clark is rather a bead outline the entire outer perimeter of the strap, and the strap of Uke is not analogous to this crowded art field. Moreover, the ends of all the prior-art straps are not adapted to pass through an orifice in the strap and secure itself thereat. Only applicant&#39;s strap has the structure and features for this purpose. 
   This feature, the tab and lip structure of the present invention, to pass through and ‘lock’ or secure into any given orifice on the strap has two additional useful purposes. One is to tuck away the loose end of the strap into a suitable orifice so that the loose end does not dangle or interfere with and possibly endanger one&#39;s dive by snagging or catching on an external object underwater. The other is to use this strap on any other type of fin which may have vertical posts or metal pins for strap connection. In this regard, both ends of the present invention may be looped with the tab-lip structure then inserted into and through any suitable orifice on the strap. The tab-lip structure “locks” itself once through that orifice and maintains a secure loop-like end which may be placed over the exposed post. The tension of the strap engaged over the posts and the heel of the user keeps the fins to which attached on the user&#39;s foot. 
   An alternate embodiment will incorporate an enlarged edge on both sides of the universal replacement dive fin strap, increasing the strength of the strap while still allowing the thinner wall of the central web area to stretch over the knob heads on the sides of the dive fins. This embodiment will incorporate the same arrangement of pull-tabs and heel configurations and still remain within the scope of this patent. 
   Another alternate embodiment of the universal replacement dive fin strap will incorporate a bungee cord forming loops to go over the heads of the heel strap mounting knobs on the sides of conventional dive fins. Each loop will have a retainer to maintain the size of the loop end of the bungee cord. There will also be a commercially available sliding adjustment device to vary the length of the bungee cord for size adjustments. 
   An additional alternate embodiment of the universal replacement dive fin strap will be comprised of plastic attachment clips and one or more sections of surgical tubing. The plastic attachment clips have an orifice with an enlarged end that fits over the heel strap mounting knob head on the sides of the dive fins and a reduced end that fits snugly on the shank section of the knobs when the fins are put on. These attachment clips have one or more prong ends allowing that when surgical tubing is slid over it will hold securely when a force is exerted to remove it. The surgical tubing will have to be cut to the size of the wearer, and can easily be replaced when it loses its elasticity or is broken. 
   The universal replacement dive fin strap and the additional embodiments endeavor to eliminate the use of the common buckling system of length adjustment and to create a device in its most simple state, along with the convenience of being able to always have a spare set whether they came on the dive fins or not. 
   Several objects of this invention include, but are not limited to:
         a. Supply the market with simple, inexpensive universal replacement dive fin straps.   b. Create a single universal replacement dive fin strap that can fit on either the right or left fin, not requiring a right foot and left foot fin strap.   c. Create a dive fin strap that is small and light weight enough that divers can always carry a spare set with them so when a strap is either lost or broken there is no problem replacing it.   d. Create a dive fin strap that mounts easily to many different manufacturers dive fins by the means of the conventional heel strap mounting knobs.   e. Create a dive fin strap that does not have the conventional buckle as a means of adjustment.   d. Create a dive fin strap that can easily be made in many bright and varying colors.   e. Create a dive fin strap that has superior flexibility for holding the strap in position on the heel of the divers foot.   f. Create a dive fin strap that makes the open heal or strap style of dive fins perform in the same manner as a fixed-heel strap style of fin with the molded integral heel strap   g. Create a dive fin strap that allows a diver to use the same pair of dive fins whether they use the booties for cold water or not.   h. Provide a quick and easy replacement for a broken dive-fin strap while a diver is on a dive without requiring the diver to interrupt the dive and surface for a new dive fin.   i. Provide for a functionality of the end tab to facilitate a “locking” of itself into place into an orifice on the strap to hold the fin onto the strap.   j. Create a universal replacement dive fin strap that can be used as a replacement on a wide variety of styles and sizes of dive fins made by many different dive fin manufactures.       

   The present invention accomplishes its desired objects by providing a new and unique universal dive fin replacement strap that will fit a variety of different manufacturers dive fins, has no buckles, is adjustable and easily attached and made in a variety of colors. These together with other-objects and advantages which will become subsequently apparent reside in the details of the construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout 

   
     BRIEF DESCRIPTION OF THE DRAWING FIGURES 
     The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principals of the invention. 
       FIG. 1  depicts a perspective view of a conventional prior-art open heel or strap style of dive fin. 
       FIG. 2A  depicts perspective view of the open heel portion of the conventional open heel or strap style dive fin with the preferred embodiment of the dive fin replacement heel strap exploded away. 
       FIG. 2B  depicts a perspective detailed view of the alternate embodiment of the pull-tabs as a ring grip, of the dive fin replacement heel strap. 
       FIG. 3  depicts a perspective view of the open heel portion of the conventional open heel or strap style dive fin with alternate embodiment as a bungee cord style of dive fin replacement heel strap. 
       FIG. 4  depicts a perspective view of the open heel portion of the conventional open heel or strap style dive fin with another alternate embodiment as a surgical tubing style of dive fin replacement heel strap. 
       FIG. 5  is a rear elevation view of the dive fin replace heel strap. 
       FIG. 6  is a plan view of dive fin replacement heel strap as taken on line  6 — 6  of  FIG. 5 . 
       FIG. 7  is the front view of the multiple-tube surgical tubing attachment clips. 
       FIG. 8  is the front view of the single-tube surgical tubing attachment clips. 
       FIG. 9  is a side view of the surgical tubing attachment clips of  FIGS. 7 and 8 . 
       FIG. 10  is a section through the heel portion of the preferred embodiment of the dive fin replacement heel strap. 
       FIG. 11  is a section through the heel portion of an alternate embodiment of the dive fin replacement heel strap with the grip member tipped away from the heel area. 
       FIG. 12  is a section through the heel portion of an additional alternate embodiment of the dive fin replacement heel strap with in a shape that will conform to the shape of the wearer&#39;s heel. 
       FIG. 13  is a side view of the left side of the universal replacement dive fin strap displaying a single square orifice with the enlarged edge. 
       FIG. 14  is a side view of the left side of the universal replacement dive fin strap displaying two octagonal orifices with the enlarged edge. 
       FIG. 15  is a side view of the left side of the universal replacement dive fin strap displaying three hexagonal orifices with the enlarged edge. 
       FIG. 16  is a side view of the left side of the universal replacement dive fin strap displaying four elongated narrow orifices without the enlarged edge. 
       FIG. 17  is a rear elevation view of the dive fin replacement heel strap with a tab-lip structure attached to a buckle of a fin and passed through an orifice on the strap. 
       FIG. 18  is a plan view of dive fin replacement heel strap as taken on line  17 — 17  of  FIG. 17  with the tab-lip structure passed through an orifice without the fin illustrated. 
       FIG. 19  is a detailed close-up view of the “locking” feature. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Referring in detail now to the drawing, wherein similar parts of the invention are identified by like reference numerals, there is seen in  FIG. 1  a perspective view of the conventional open heel or strap style of dive fin  10 . At one end is the propulsion blade  12  that has many different configurations depending upon the manufacturer. At the opposite end  16  is the open foot pocket  14 , distinguishing this style of dive fin from the full foot pocket style with the heel strap as an integral part of the fin. On the outer sides of the foot pocket  14  are the conventional heel strap mounting knobs  20  consisting of an enlarged head end  22  and a shank portion  24  used by several manufacturers of dive fins.  FIG. 2A  depicts a perspective view of the open foot pocket  14  of the open heel or strap style dive fin  10  with the universal replacement dive fin strap  28  exploded away. The universal replacement dive fin strap  28  consists of the heel area  30 A with the side elements  32  and  34  and a plurality of orifices  36 A in the rectangular shape, terminating at the distal ends  38  and  40  with pull-tabs  42  and  44 . The surface of the heel area  30 A will have a textured surface  46  to minimize sliding on the heel of the wearer. Additionally a similar pull-tab  48  is located centrally above the heel area  30 A. The outer edges  50  of the universal replacement dive fin strap  28  may be enlarged on some embodiments with the central web  52  being a thinner section allowing the stretch required to expand over the heel strap mounting knobs  20 .  FIG. 2B  depicts an alternate embodiment of the pull-tab  48  as being a ring grip  54  that can also replace the pull-tabs  42  and  44  at the distal ends of the side elements  32  and  34 . 
     FIG. 3  depicts the open heel portion  14  of the open heel of strap style dive fin  10  with an alternate embodiment as a bungee cord style of dive fin replacement strap  60 , consisting of a bungee cord  62  with loop ends  64  and  66 . Loop ends  64  and  66  are held in position by retainers  68  and  70  while a sliding adjustment device  72  allows for length adjustments. The loop ends  64  and  66  expand to go over the enlarged head  22  of the heel strap mounting knobs  20  and tighten on the shank portion  24  in a similar fashion to the way that the orifices  36 A through  36 H work on the shank portion  24 ; or just orifices  36 A,  36 B,  36 C, and  36 D work on the shank portion  24 . 
     FIG. 4  depicts the open heel portion  14  of the open heel of strap style dive fin  10  with an additional alternate embodiment as surgical tubing style of dive fin replacement strap  80  composed of one or more sections of surgical tubing  82  connected to attachment clips  84  and  86 . The surgical tubing  82  is connected to the attachment clips  84  and  86  by the conventional means of sliding the tubing over the prong end  88  and over the retainer bumps  90 . When the surgical tubing is pushed on the prong ends  88 , it expands allowing it to slide easily over the bumps  90 , but when a force is applied to remove the tubing, it shrinks and holds tightly to the bumps  90  on the prong ends  88 . The attachment clips  84  and  86  have an orifice  92  with an enlarged end  94  that fits over the enlarged head  22  of the strap mounting knobs  20 , and a reduced end  96  that fits snugly on the shank end  24  of the strap mounting knobs  20 . 
     FIG. 5  is a side view of the preferred embodiment of the universal dive fin replacement heel strap  28  displaying the heel area  30 A with the textured surface  46  that retards sliding of the wearers heel. The two side elements  32  and  34  show the plurality of orifices  36 A in a rectangular shape and the pull-tabs  42  and  44  on the distal ends  38  and  40  with the outer edges  50  shown in their enlarged state.  FIG. 6  is a top view of the universal dive fin replacement heel strap  28 . 
     FIG. 7  depicts the attachment clips  84  and  86  with two prong ends  88  with  FIG. 8  depicting one prong end  88  [with bumps  90  and combination orifice  92  having an enlarged orifice  94  and smaller orifice  96 ], but it must be understood that there can be a number of attachment clips  84  and  86  with any number of prong ends  88  [with bumps  90 , combination orifice  92  having and enlarged orifice  94  and smaller orifice  96 ] and still be within the scope of this patent. 
     FIG. 10  is a section through the heel portion  30 A with the flat configuration and the pull tab  48  straight up and the orifice  36 B in a spherical shape while  FIG. 11  shows a section through the heel portion  30 B with the pull tab  48  angled away from the wearers heel and the orifice  36 C in a elliptical shape.  FIG. 12  is a section showing the heel portion  30 C in the curved shape matching the shape of the heel of the wearer with the pull tab  48  and the orifice in a triangular shape  36 D. 
     FIGS. 13 through 16  display the left side of the universal replacement dive fin strap with four of the different configurations of orifices, the first being  FIG. 13 , showing the square orifice  36 E, located in the distal end of the strap  38  next to the pull tab  42 . The second  FIG. 14  having two octagonal orifices  36 F, located in the distal end of the strap  38  next to the pull tab  42 . The third being  FIG. 15 , showing the hexagonal orifices  36 G, located in the distal end of the strap  38  next to the pull tab  42 . The fourth  FIG. 16  being four elongated narrow orifices  36 H, located in the distal end of the strap  38  next to the pull tab  42  without the enlarged edge. 
     FIG. 17  illustrates the strap  28  engaging a dive fin  110  having an open pocket  14  and a buckle  122 . The strap [not shown] manufactured for this fin  110  threads through the buckle  122  and into and through translating buckles on the strap. This permits adjustment for size and comfort. When the strap becomes unusable for whatever reason, it must be discarded and typically a new strap of similar design replaces the old one. For a diver, on a dive, this can be a cumbersome and, oftentimes, dangerous experience; particularly if the diver does not have a similar replacement strap. 
   The present invention is suitable to serve as a replacement strap for the buckle strap and buckle fin  110 . The unique distal-end structure of the tab  42 ,  44  and lip  27  in conjunction with the indent  26  created by the diagonal design  25  and the orifices  36 A–H enable this unexpected result. Since the distal ends  38 ,  40  of the strap  28  and their respective tabs  42 ,  44  are virtually identical in structure, for administrative clarity when the term “distal end” is used, regardless of the reference character employed, it shall be deemed to refer to and incorporate the other end [i.e.,  38 ,  40  interchangeable unless otherwise indicated]; and when the term “tab” is used, regardless of the reference character employed, it shall be deemed to refer to and incorporate the other tab as well [i.e.,  42 ,  44  interchangeable unless otherwise indicated]. For illustration purposes, tab  44  is shown as the end being employed to attach the strap  28  to the fin  110  and tab  42  is shown as the tab revealing the unique structural features of the tabs. 
   At the end  38  of the strap  28  adjacent to the tab  42  is an indent  26  on the bottom and on the top of the outer edges  50 . The indent may be defined by either:
         (1) a downward angling diagonally from the top toward the tab  42  and upward diagonally from the bottom toward the tab  42  [as illustrated in  FIG. 5 ] at angles of approximately between 15° and 60° from the horizontal plane of the respective outer edges, resembling a V-like structure, up to approximately 89°]. The diagonal narrowing is represented by reference character  25  and is hereby referred to as diagonal narrowing [the cut-out or indent  26  formed by the diagonal narrowing  25  terminates at the tab  42 ]; or   (2) an approximately perpendicular cut-out downward from the top outer edge  50  and upward from the bottom outer edge, in relation to the horizontal plane of the respective outer edges and a cut-out thereafter toward the tab  42  followed by a respective cut-out toward the outer edges  50 , thereby resembling a U-like structure with squared [as illustrated in  FIG. 17 ] or curved corners.       

   The distance from the upper indent to the lower indent is approximately equal to or less than the dimension of the opening of the orifices  36 A. Where the dimension of the opening of the orifice  36 A is D, then the distance from upper indent to lower indent is D to D−n [where ‘n’ is any distance]. The tab  42  is adjacent to and distal from the indent  26  and it extends vertically above and below the respective indents. Where the height of the strap is H, the height of the tab  42  is D+n and generally H−n, though it could be H. 
   The width of the tab  42  also is greater than the width of the strap  28 . Where the width of the strap  28  is W, then the width of the tab  42  is W+n. For the locking feature, however, the width of the tab  42  generally should be substantially greater than the width of the strap such as from approximately 1.5 W to approximately 10 W. The height of the tab  42  being generally greater than the dimension of the opening of the orifice  36 A and the width of the tab  42  being greater than the width of the strap  28  is referred to as the tab-lip structure with the lip-portion bearing reference character  27 . 
   It is this tab-lip  42 ,  27  structure which, after the tab  42  is passed through an orifice  36 A which “locks” the tab  42  in place and prevents the tab  42  from retreating from the orifice  36 A. It is the structure of the indents  26  and their location [adjacent to the tab  42 ] which facilitates passage through the orifices  36 A and it is the structure of the tab  42 , in relation to the orifice  36 A, which “locks” the end of the strap thereat.  FIG. 19  illustrates this locking in close-up detail. 
   Therefore, either tab  42 ,  44  of the present invention  28  may be pushed through the opening  124  in the buckle  122  of the fin  110  [in  FIGS. 17 and 19  tab  44  is illustrated as the operative tab], and then the tab  44  is passed back toward the strap  28  and pressed through any suitable orifice  36 A. The loop  29  formed encircles the buckle&#39;s stem and holds it. The indent  26  [V-shaped or U-shaped] eases the passage of the strap&#39;s distal end through the orifice and the lip  27  around the tab  42  edges “locks” the end thereat. This type of buckle  122  may also have a vertically-disposed horizontally-sliding bar  126 . 
     FIG. 17  in combination with  FIG. 19  illustrates the strap  28  so attached to the previously strapless dive fin  110 .  FIG. 18  illustrates this attachment [without the dive fin  110 ] as viewed from above. 
   It must be made clear that any number, any geometric sizes or shapes of these orifices, for the means of attachment, may be located along any portion of either side of the universal replacement dive fin strap, and the strap may or may not have the same orifices symmetrically located on either side of the strap and still be within the scope of this patent.