Open-shoe type swimming flipper

Abstract: Open-shoe type swimming flipper, to be worn on a foot wearing a boot (4), the shoe including an element of insole (2') and an element (10; 12) for holding the front of the boot (4). The element of insole (2') of the flipper is provided with a number of coupling elements (8; 8') which fit into a number of complementary coupling elements (6; 6') made in the sole of said boot (4). The element for holding the front of the foot is connected permanently at least along one side edge to one side edge of the part of the insole (2') of the flipper, whilst the other side edge may be connected by clasping devices (14; 16; 24; 26) directly to the opposite side edge of the part of insole (2') of the flipper or to the free edge of an element, which, in turn is connected to said opposite side edge of the part of insole (2') of the flipper.

Description: The subject of the present invention are swimming flipper of the open-shoe type, to be worn by a scuba diver wearing appropriate boots. In the European patent application No. 95107053.1, EP-A-685242, of the same applicant, a flipper is described of the same type as the one mentioned above and in the preamble of the appended claim 1, in which the insole of the portion of shoe presents two or more longitudinal ribs, and in which the boot to be worn together with said flipper presents a corresponding set of grooves complementary to said ribs. Owing to the said coupling together of ribs and grooves between the shoe and the boot, such a flipper affords better stability when it is worn. However, in the aforesaid flipper it is necessary in every case for the shoe to be provided with a heel strap in view of the fact that both the boot and the flipper may easily slip off during swimming, since this type of coupling prevents any movement in the transverse direction but not that in the longitudinal direction between the flipper and the foot of the user. The main purpose of the present invention is thus that of creating a swimming flipper of the shoe type open at the back, to be worn on a foot wearing a special boot, where between the insole of the flipper and the boot there are devices of firm constraint both in the longitudinal direction and in the transverse direction, such as to prevent undesirable relative movements between the boot and the flipper, with the possibility of eliminating the need for a rear heel strap. A further purpose of the present invention is a flipper of the type described above, where the shoe-like part is made so that it can be opened, at least partially, so as to enable easy insertion of the foot provided with boot into the shoe, in order to enable the said complementary devices of constraint between the insole of the shoe and the sole of the boot to slot together, there being provided on the shoe clasping devices for fastening said part of shoe over the boot so as to secure these parts firmly together. The swimming flipper according to the invention is defined in the claims. These and other characteristics of the present invention will emerge more clearly from the following description of some of its embodiments, in which reference is made to the attached drawings, where: Figure 1 is a schematic longitudinal section representation of a swimming flipper with corresponding boot according to a first embodiment of the present invention, where the shoe-like part of the flipper is made up of two half-shells which can open out and may be fastened to one another by appropriate clasping devices. Figure 2 is a side elevation of the flipper of Figure 1. Figure 3 is a cross-sectional view along the plane indicated by the line A-A of Figure 2 of the flipper-boot unit of Figures 1 and 2 with the two half-shells of the shoe part of the flipper locked in the closed position on the user's foot. Figure 4 is a top plan view of the flipper of Figures from 1 to 3, with the two half-shells in the closed position. Figure 5 is a view similar to that of Figure 3, illustrating a second embodiment of the flipper according to the invention, represented with the two half-shells of the shoe-like part of the flipper opened out to allow the user of the flipper to slide in/out his foot wearing the boot. Figure 6 is an elevation of a third embodiment of the flipper of the invention, according to which the shoe-like part includes only one shell having a basically semicircular section hinged along one of its edges to the adjacent part of the edge of the blade and which can be fastened at the other edge to the opposite part of the edge of the flipper blade by appropriate clasping devices. Finally, Figures 7 and 8 are two side elevations of a flipper according to a fourth embodiment of the present invention, in which the shoe presents a shell having a basically semicircular section, connected along one of its edges to the underlying part of the edge of the flipper blade, whilst its other edge is connected along one of its front side parts to the opposite edge of the flipper blade, whereas the rear part of said edge is separate from the edge of the flipper so that it may be raised elastically (position shown in Fig. 7) to enable the user's foot wearing the boot to slide in. The shoe is then closed, as shown in Fig. 8, by means of an appropriate clasp lever. With reference to the drawings, and with particular reference first of all to Figures from 1 to 4, the flipper according to the invention illustrated therein is of the open-shoe type and includes one part of blade 2 which extends at the rear to form the insole 2' of the shoe-like part of the flipper. The insole part 2' presents on the inside a number of recesses 8, the function of which will be described in what follows. The shoe-like part of said flipper includes two half-shells 10, 12 (see Figures 3 and 4), the side edges of which are hinged to the side edges of the part of insole 2'. At the free edges of the two half-shells 10, 12 there are provided clasping devices 14, 16 to fasten these edges together, as is better illustrated in Figures 3 and 4. The flipper is completed by a boot 4 equipped in this part of the sole with studs 6 complementary and corresponding to the recesses 8 made in the insole part 2' of the flipper. The flipper described works as follows: after putting on the boots 4, the user releases the clasps for closing 14, 16 and is thus able to open out the two half-shells 10, 12 - in this connection, see the position of these parts 10 and 12 illustrated in the embodiment of Figure 5. In this way, the user can easily introduce his foot wearing the boot 4 into the corresponding flipper, pressing the studs 6 of the boot into the recesses 8 of the flipper insole 2'. At this point the two half-shells 10, 12 are closed back onto the user's foot wearing the boot and fastened in the closed position by means of the clasps 14, 16. In this way, the foot is firmly secured to the flipper 2, 2', forming a single piece with it, so that any relative movement between the foot and the flipper is prevented, with consequent maximum efficiency in flipper action and maximum user comfort. The embodiment described above makes it possible to eliminate the heel strap, which is always present in this type of flipper, and which at times can cause a number of problems during swimming, in that the foot inevitably tends to slide backwards and forwards. In addition, with the flipper of the type described above it is possible to make the shoe-like part 10, 11 of a harder plastic material, without this causing tiredness or pain for the user's foot, in so far as the latter is firmly blocked in the shoe without any possibility of relative movements, and hence of rubbing, cramp, etc. Figure 5 shows a variant of the flipper of Figures from 1 to 4, according to which in the part 2' of the flipper insole are made studs 6' which plug into corresponding complementary grooves 8' made in the sole of the boot 4. In this figure, the two half-shells 10, 12 are represented in the opened-out position, i.e., in the position for sliding the foot wearing the boot 4 into/out of the flipper. Even though the studs 6, 6' respectively, are represented as cylindrical elements which slot into the corresponding cylindrical recesses 8, 8' respectively, it remains understood that these studs, and the recesses corresponding to them, may have any appropriate shape or profile. In the case where, as is illustrated in Figures from 1 to 4, these studs are made in the sole of the boot 4, they moreover constitute antislip elements for the scuba diver, in so far as the latter moves wearing the boots without flippers on rocks or on other wet and slippery surfaces. Figure 6 illustrates a second embodiment of the flipper according to the invention. According to this embodiment, the flipper shoe comprises a shell 20 which wraps completely round the top of the user's foot and is hinged along one side edge to one side edge of the insole part 2' of the shoe-like part of the flipper, whilst the opposite side edge is constrained in a releasable way to the opposite side edge of the insole part 2' of the shoe by means of adjustable clasps 24, 26. The operation of this embodiment of flipper will be appear evident from the following description. By releasing the clasps 24, 26, the shell 20 may be raised, thus enabling the foot wearing the boot 4 to slide into/out of the flipper. Once the foot is inserted into the flipper and the studs 6 are plugged into the recesses 8, fastening of the clasps 24, 26 secures the foot to the flipper itself. Finally, Figures 7 and 8 illustrate a further type of the flipper according to the present invention. According to this variation, the flipper shoe includes a shell 20, which wraps completely round the top and front of the user's foot and which is hinged along one of its side edges to one side edge of the insole part 2' of the shoe-like part of the flipper, in a similar way as was described for the variant of Figure 6. Its opposite side edge, instead, is constrained in an only partially releasable manner to the rear part of the opposite side edge of the insole part 2' of the shoe by means of adjustable clasps 24, 26. The operation of this embodiment of the flipper will emerge clearly from the following description. By releasing the clasps 24, 26, the rear part of the shell 20 may be raised, thus enabling the foot wearing the boot 4 to slide into/out of the flipper. Once the foot is inserted into the flipper and the studs 6 are plugged into the recesses 8, by fastening the clasps 24, 26 the foot is secured to the flipper itself. From the foregoing detailed description of the structural and functional characteristics of the swimming flipper that is the subject of the present invention, the advantages already mentioned are further highlighted. The swimming flipper according to the present invention is able to create a firm constraint between the boot and the blade, and hence between the scuba diver's foot and the blade, with elimination of any undesirable movements as a result of the combined action of the fastening on top, i.e., on the instep of the foot, of the flaps of the parts 10, 12, respectively 20, making up the top constraining part of the flipper shoe, and of the reciprocal slotting of the studs 6, respectively 6', into the complementary recesses 8, 8' respectively, made in the sole of the boot and in the insole part 2' of the flipper, respectively. In addition, the fastening devices 14, 16, 24, 26 that are present on the flaps of the shoe-like part of the flipper enable adjustment of fastening according the shape of the user's foot, thus creating conditions of perfect adherence and utmost comfort for the user during use of the flippers. Furthermore, the swimming flipper according to the invention allows the use of relatively stiff materials for the shoe-like part 10, 12, 20 of the flipper and the moulding of these parts in a single piece with the insole 2' and the blade 2 of the flipper. Even though the clasps illustrated are of the two-element type that can be fastened by means of a lever, for example like the ones used for ski boots, it is understood that such clasps may be of any type whatsoever that may be suitable for the purpose.

Claims: Swimming flipper of the open-shoe type, to be worn on feet wearing boots (4), including one part of flipper blade (2) and one shoe-like part including an element of insole (2') and a gripping element (10; 12; 20) for holding the front of the boot (4), which extends from the front of the user's foot to a region near the foot instep, said element of insole (2') of the flipper being provided with a number of slot-in constraining elements (8; 8') which fit together with a number of complementary slot-in constraining elements (6; 6') corresponding to said constraining elements (8; 8') made in the sole part of said boot (4), characterized in that the said constraining elements (6, 8; 6', 8') being formed in a such way as to constrain both in the longitudinal direction and in the transverse direction, the said gripping element (10, 12; 20) of the front of the foot being firmly connected along at least one of its side edges to one side edge of said part of insole (2') of the flipper, whilst its other free side edge, or part of it, is connected, using suitable clasping devices (14, 16; 24, 26) directly to the opposite side edge of the insole part (2') of the flipper or to the free edge of an element (12, 10) which is in turn connected to said opposite side edge of said insole part (2') of the flipper. Flipper according to Claim 1, characterized in that said gripping element for holding the front of the boot includes two opposed flaps or half-shells (10; 12) each of which is connected by means of one of their side edges to one of the two opposite side edges of the insole part (2') of the flipper, and the free edges of which join on the top of the part housing the boot (4) in the flipper, these free edges being provided with mutually clasping devices (14; 16). Flipper according to Claim 1, characterized in that that said gripping element for holding the front of the boot includes one flap or half-shell (20) connected by means of one of its side edges to one of the side edges of the insole part (2') of the flipper, and the other free side edge of which is provided with clasping devices (24) working in conjunction with complementary clasping devices (26) located on the opposite side edge of the insole part (2') of the flipper. Flipper according to Claim 1, characterized in that said gripping element for holding the front of the boot includes one flap or half-shell (20) connected via one of its side edges to one of the side edges of the insole part (2') of the flipper, and the other side edge of which is constrained in its front part to the front part of the opposite side edge of the insole part (2') of the flipper, whilst the rear part is free from said edge and is provided with clasping devices (24) which work in conjunction with complementary clasping devices (26) located at said opposed side edge of the insole part (2') of the flipper. Flipper according to any one of the preceding claims, in which said slot-in constraining elements (6, 8; 6',8') comprise a plurality of recesses (8; 8') which fit together with a plurality of complementary protrusions (6; 6'). Flipper according to claim 5, in which said recesses (8; 8') and said complementary protrusions (6; 6'), may have any shape that is suitable for the purpose, and, for example, may have the form of pins or rods and complementary holes, or of blocks and complementary slots that may be of various shapes. Flipper according to any one of the preceding claims, in which said -gripping element (10; 12; 20) for holding the front of the boot includes may be made of a relatively rigid material, and may be made of a single piece with the insole part (2') of the flipper itself. Flipper according to any one of the preceding claims, where said clasping elements may be of any type suitable for the purpose. Flipper according to Claim 8, where said clasping devices (14; 16; 24; 26) are provided with adjustable clasp levers so as to adapt to the different sizes and shapes of feet of the users.

Inventors: GAROFALO GIOVANNI, GAROFALO, GIOVANNI
Applicants: HTM SPORT SPA, HTM SPORT S.P.A.
Application year: 1998
Main classification: A63B31
IPC codes: A63B31