KARATE-AND-BOXING SACK

Abstract: The karate-and-boxing sack is designed for use in different kinds of fighting arts. The new construction of the karate-and-boxing sack makes its life-time longer, renders it resisting to hard and quick hits and repeated folding. It makes it possible also to train blows with the lower limbs, to change its form and weight by hardness close to that of the human body, and to widen the scope of its application.

Description: KARATE-AND-BOXING SACK The present invention concerns a karate-and-boxing sack which is intended for the training of various fighting techniquess . A boxing sack comprising an outer sack of synthetic material and an inner sack with stuffing is known. The upper part of the inner sack is turned inwards in such a way that a cavity is formed in which a metal hoop is placed. The outer sack is slotted above the hoop and a wire rope passes through the slots, ends in a ring and is fixed to a support. The disadvantages of the known sack are as follows: Limited applicability resulting from the lack of means for lifting and lowering and large deflection of the sack after being hit. Lack of a possibility of using the sack for lower-limb training, large deformations of the sack during hitting and short life due to the friction between the wire rope and the outer sack. The purpose of the present invention is the creation of a karate-and-boxing sack characterized by a long life, small deformation, widened applicability, various sizes and shapes, increased weight, rigidness similar to that of the human body, capability for vertical displacement and reliable suspension. The problem is solved by a karate-and-boxing sack made of synthetic material in which an inner sack with stuffing is placed. At its upper end the outer sack is turned inwards in such a way that a cavity is formed in which a metal hood is placed. According to the invention the outer sack is made of a synthetic material on polymer basis having tensile strength values of 2000-7000 N in longitudinal direction and 1500- 5500 N in transversal direction. The stuffing of the inner sack is foreseen to be on the basis of natural and synthetic rubber. Plastic duprene elements and rubber elements produced through the recycling of car tyres are used. An additional layer is foreseen between the outer and inner sacks. A cover fixedly connected to the inner surface of the outer sack is placed on the upper side of the inner sack. The outer sack is slotted above the hoop and planks through which a flexible element passes are mounted to the hoop in the formed slots; the ends of said flexible element pass through a yoke and a roll mounted with displacement at a distance from the axis of the karate-and-boxing sack. Λt the lower outer side of the outer sack a ring is mounted through which another flexible element connected to a support passes . In another optional embodiment of a karate-and-boxing sack the ends of the flexible element are fixed rigidly to supports mounted lateral l} r regarding the axis of the karate- and-boxing sack making an angle a. In a third optional embodiment of the invention the karate- and-boxing sack is arranged horizontally and the outer sack is closed at both sides. On the upper part of the outer sack rings are mounted through which flexible elements suspended rigidly to supports pass. In a fourth optional embodiment of the invention the two sacks have a pear-shaped form and the outer sack is closed at both sides. On the upper and lower parts of the outer sack rings are foreseen through which flexible elements pass; the ends of said elements being fixedly connected to supports . The advantages of the karate-and-boxing sack are as follows: Long life of the karate-and-boxing sack resulting from the use of a synthetic material for the outer sack with high strength values, resistant to strong hits and multifold bending, the reliable suspension and minimal deflection when hit, the small deformabi 1 i ty of the sack because of the stuffing. Possibility of training kicks, stable connection of the flexible element to the hoop with the help of planks which eliminates the friction between the flexible element, the hoop and the outer sack. Possibility of changing the shape and weight of the sack. Possible embodiments are shown in the applied figures where: Fig. 1 is a vertical section of a cylindrical karate-and- boxing sack. The karate-and-boxing sack consists of an outer sack 1 made of synthetical material on polymer basis having tensile strength values of 2000-7000 N in longitudinal direction and 1500-5500 N in transverse direction, with folding resistance 50,000 to 90,000 times, in said sack an inner sack 3 filled with elements on the basis of natural and synthetic rubber 4 being placed. It is preferred to use plastic duprene elements and rubber elements produced through the recycling of car tyres. An additional layer 2 is foreseen between the outer sack 1 and the inner sack 3. A cover fixedly connected to the inner surface of the outer sack 1 is placed on the upper part of the inner sack 3. The outer sack 1 is slotted above the hoop 8 and planks 9 through which a flexible element 10 passes are mounted in the formed slots to the hoop 8; the ends of the flexible element passing through a yoke 11 and a roll mounted with displacement at a distance regarding the axis of the karate- and-boxing sack and being fixed to a support 12. On the lower outer part of the outer sack 1 a ring 13 is mounted through which another flexible element 14 connected with support 15 passes. In a second optional embodiment shown in Fig. 2 the ends of the flexible element 10 are rigidly connected to supports 17 mounted laterally regarding the axis of the karate-and- boxing sack making an angle a. In a third optional embodiment of the invention shown in fig 3 the karate-and-boxing sack is arranged horizontally and the outer sack 1 is closed at both sides. On the upper SUBSTITUTESHEET part of the outer sack 1 rings 18 are mounted through whic flexible elements 19 suspended rigidly to supports 20 pass. In a fourth optional embodiment of the invention shown i fig 4 the two sacks have a pear-shaped form and the oute sack 1 is closed at both sides. On the upper and lower part of the outer sack 1 rings 21 and 23 are foreseen throug which flexible elements 22 pass; the ends of said element being fixedly connected to supports 24 and 25. The operation of the karate-and-boxing sack is as follows: When training high and low hits, using the flexible-elemen 10 the sack is adjusted at the desired height; the flexibl elements 10 and 14 being lengthened or shortened and th sack being fixed to the supports 12 and 15. When the sack i fixed in this way to the supports strong and fast hits ar performed and a rigidness similar to that of the human bod is imitated due to the stuffing. In the second optiona embodiment the rotation of the sack round its axis i eliminated through the suspension. The sack of pear-shape form is used for high, fast and precise hits. With th horizontally arranged sack series of specific hits ar performed. The various forms and suspensions of the sac enable different groups of hits to be trained unde conditions similar to those in real situations. SUBSTITUTESHEET

Claims: CLAIMS OF THE INVENTION 1. A karate-and-boxing sack comprising an outer sack made of synthetic material in which an inner sack with stuffing is placed, the upper part of the outer sack being folded and turned imwards in such a way that a cavit3' is formed in which a metal hoop is mounted, and the outer sack being slotted above the hoop and through the formed slops a flexible element for suspension being foreseen, the karate- and-boxing sack being characterized by the fact that the synthetic material of which the outer sack 1 is made is on polymer basis and has tensi le strength values of 2000-7000 N (62-84 MPa) in longitudinal direction and 1500-2000 N (60-80 MPa) in transverse direction, with folding resistance 50,000 to 90,000 times, and the inner sack 3 has a stuffing on the basis of natural and synthetic rubber and between the two sacks 1 and 3 a layer 2 of felt is foreseen, a cover 6 fixedly connected to the inner side of the outer sack 1 being f reseen n the uppe si e f the inne sack , an planks 9 through which the flexible element 10 for suspension passes being mounted in the slots 5 to the hoop 8. 2. A karate-and-boxing sack in accordance with claim 1 characterized by the fact that the ends of the flexible element 10 pass through a 3-oke 11 and a rol l mounted with displacement at a distance "E" regarding the axis of the karate-and-boxing sack and re fixed to a u port 12. 3. A karate-and-boxing sack in accordance with claim 1 characterized by the fact that the ends of the flexible element 16 are mounted lateral ly regarding the axis of the karate-and-boxing sack making an angle a and are rigidl3 r connected to supports 17. 4. A kara e-and-bo ing sack in accordance with claims 1 to 3 ch acterized by the fact that a ring 1 through which a flexible element 14 for the lower suspension to support 15 is mounted on the lower part of the outer sack 1. 5. A karate-and-bo ing sack in accordance with claim 2 characterized b} r the fact that the additional layer between the outer and inner sacks 1 and 2 is made of felt. 6. A karate-and-boxing sack comprising an outer sack of synthetic material in which an inner sack with stuffing is placed; elements for suspension being foreseen for the outer sack; the said karate-and-boxing sack being characterized by the fact that the synthetic material of which the outer sack is made is on polymer basis and has tensile strength values of 2000-7000 N in longitudinal direction and 1500-5500 N in transversal direction, with folding resistance 50,000 to 90,000 times, and the inner sack 3 has a stuffing 4 on the basis of natural and synthetic rubber; to the upper part of the outer sack 1 rings 18 being foreseen through which flexible elements 19 suspended r i gid 1 * to supports 20 pass. 7. Λ karate-and-boxing sack in acc r ance with clai 6 characterized by the fact that the two sacks 1 and 3 have pea -shaped for . 9. A kar te-an -bo in sack in accordance ith clai 8 characterized by the fact that on the lower side of the outer sack 1 rings 23 ar mounted thiough which a flexible element 22 fi edly" connected to the suppor t 25 passes. 10. Λ karate-an -bo in ack in acc rdance ith claim 1 characterize b3" the fact th t the stuffing 4 consists of plastic duprene elements and rubber elements produced b3' the rec3'cling of car t3 r res

Inventors: LISHEJKOV ALEKSANDER MARINOV, LISHEJKOVA CVETELINE DIMITROVA, LISHEJKOV, ALEKSANDER, MARINOV, LISHEJKOVA, CVETELINE, DIMITROVA
Applicants: LISHEJKOV ALEKSANDER MARINOV, LISHEJKOVA CVETELINE DIMITROVA, LISHEJKOV, ALEKSANDER, MARINOV, LISHEJKOVA, CVETELINE, DIMITROVA
Application year: 1993
Main classification: A63B69
IPC codes: A63B69