Patent Publication Number: US-6336894-B1

Title: Convergent vector resistance device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     Not applicable 
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT 
     Not applicable 
     BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     This invention relates to a method of resisting, human motion with two or more vectors of resistance converging upon a common unit of attachment, as well as equipment used to resist movement of the users muscular-skeletal system, particularly such equipment utilizing convergent force vectors. 
     BACKGROUND OF THE INVENTION 
     2. Description of Prior Art 
     Home and commercial gyms, fitness studios, wellness centers, athletic facilities, corporate health facilities rehabilitation and occupational facilities commonly supply resistance training equipment or more commonly called exercise equipment. This equipment, regardless of its location or structure, is generally used to oppose muscular contraction or rather provide resistance to a users movement whereby placing stress on the skeletal muscular system. 
     Therefore, muscles are stressed by moving body parts in contact with the resistance equipment having a magnitude selected by the user. This movement through a given range of motion usually follows a cycle often referred to as a exercise cycle that is repeated a number of times composing a set. 
     This equipment comes in many forms, shapes, and compositions. The following are examples of the most commonly encountered, or conventional equipment: Barbells, Dumbbells, plastic Tubing, Coiled Springs, Selectable-Weight-Stack Cable-Pulley-Systems, Cam-Regulated Selectable-Weight-Stack Cable-Pulley-Systems (also called variable resistance equipment), Hydraulic, and electronic Isokinetic equipment. These pieces of equipment have unique characteristics pertaining to their composition, shape, and function, but all of the above provide only one (1) vector of resistance to be manipulated. 
     The utilization of conventional equipment is limited to one vector of resistance or one action line and magnitude of resistance. Most equipment offers the option of altering, the magnitude of resistance but not the action line or vector of that resistance and therefore is limited in ability to function as a tool for resisting human motion. This may contribute to the reason users of the conventional equipment prefer to utilize a combination of equipment when applying force against muscular contraction. Unknowing to most, the reason for this is mainly attributed to the fact that using various exercise instruments will position body segments differently or otherwise varying equipment with different force vectors can challenge the body segments, further or in a safer manner, when in the presence of an injury. 
     Generally, users of this equipment rarely take the time to learn the fundamental characteristics of each piece of equipment, therefor unknowingly use equipment in a haphazard or contraindicated manner. Accompanying the ignorance of conventional resistance training, as related to skeletal and muscular adaptations, is an overall lack of understanding or misunderstanding how resisted motion affects the human body. Especially, on how body structures and articulations are impacted when introduced to force vectors, particularly the direction or action line and magnitude of such vectors. Moreover, many users learn vicariously or just imitated what is viewed causing a “monkey see monkey do phenomenon”. Most often the monkey being viewed or demonstrating a particular exercise has little, if any, sound education in the body of knowledge pertaining to exercise, fitness, therapy, sports conditioning etc. Thus, the perpetual use of conventional equipment by users uneducated in a body of knowledge concerning resistance applied to human motion has numerous consequences. Due to the physiological responses of resistance training and potential side effects of improper positioning of resistance force vectors, understanding and education is as crucial here as it would be for a medical professional prescribing medications unknowing of the drugs origin or mechanism of action. 
     Further describing as an exercise cycle is performed through a range of motion (ROM) the magnitude of force placed in opposition to a specified muscle group, particularly its action line is unique to each type of equipment listed above. With this in mind, it can be understood that with one vector of resistance, the user will have to produce a specific sequence of events involving an array of structures specific to the direction of force or action line of resistance imposed by the equipment. Because of this, as muscles perform motion against each of the conventional forms of resistance, a unique bio-mechanical and physiological response occurs when presented with this exercise stimulus. In theory, with respect to utilization of above equipment for various purposes such as therapy, fitness, health and sports conditioning etc. each piece is limited in use by its specific nature and therefor able to elicit only a select few, if more than one, bio-mechanical and physiological responses. The response or change will depend upon how the user manipulates the equipment such as in the form or path of motion (POM) and the magnitude of resistance. Additionally, the response or change will depend on the users ROM and speed of movement (inertia), usually in terms of degrees per second in which movement occurs, as well as the total time force is applied against movement. Ultimately, each exercise instrument by its own is very specific thus having limitations in use. With this in mind, it becomes apparent that the internal stabilizing structures of specific movements will also be bound to the specific exercises performed and the limitations of conventional equipment. 
     It is believed that the magnitude of a force vector placed on a given muscle at a given time changes between and among equipment within the users prescribed ROM can be dangerous or counterproductive. This occurs when a given muscle&#39;s ability to create force is exorbitantly disproportionate to the opposing force vectors magnitude. The deleterious effects of over powering (resisting) muscular contraction can lead to serious injury of the involved musculature, joint, and bones or those stabilizing or supporting the primary action. Additionally, during the exercise cycle the muscles are capable of resistance force differently at various joint angles. Typically, at the joint angle, were the moment arm and resistance is greatest within a ROM, the largest number of motor units will be active. Generally speaking, with the previous particulars, cross bridging of the muscles filaments will also be greatest at the joint angle when the most number of motor units are active. 
     Furthermore, due to improper exercise intensities the use of conventional equipment often imposes counterproductive trauma upon involved articulations or joints and their respective bony levers. Moreover, this can be partially owed to the fact that to increase the potential likely-hood of enhanced physiological response most often the magnitude of resistance is increased in an effort to improve the stimulus to the muscular skeletal system. Typically this occurs when the muscle groups involved at specific points within the ROM feel unchallenged or conditioning levels have hit a plateau whereby the exerciser, desiring greater conditioning levels, increases the magnitude of resistance. This exemplifies the limitations of conventional equipment, particularly the absence of additional force vectors. In this situation at specific points within the ROM of an exercise cycle the resistance fails to challenge the muscle(s) of interest therefor the user, using equipment with only one force vector to manipulate, has to increases the magnitude of resistance in order to further challenge the muscular-skeletal system. As a result, the increased magnitude of force at certain positions throughout the range of motion can cause temporary or permanent damage to the structure or tissue of and around a given articulation, whether having a preexisting injury or being of sound structure prior to the exercise. Conversely, health, fitness, therapy, and human performance progress may be impeded if the magnitude of force, at any given point within the ROM, is inadequate in resisting movement of the user. This occurs when the resistance doesn&#39;t challenge the user and results in hindrance of progression and an undesired physiological response to the resistance training, conditioning, or therapy modality 
     An example of conventional equipment is the barbell, dumbbell, or more generally speaking a free-weight. Free-weights have one (1) vector of resistance with the resulting action line directed straight toward earth, dictated by the earth&#39;s gravitational pull on all objects. Free-weights come in a plurality of magnitudes and the user has to choose the one that best fits the exercise and goal of the user. The most apparent disadvantage is that the vector of resistance regardless of magnitude will direct any free-weight toward the earth, thus following the action line of gravity. As this free-weight is used, only a few specific positions in the ROM provide enough resistance in opposition to a given muscles force vector or it&#39;s action line throughout the exercise cycle. This can cause serious implications when trying to match the potential force of muscles with that created by lifting free-weights especially for those compromised by a previous injury or individuals in rehabilitation not yet ready for free-weight exercise training. 
     Consequently, in a given position, as the involved bony levers of the exercise cycle decrease or increase joint angle the resistance force will contribute less to the rotation of the bony levers and more to linear distraction or compression of the involved articulation and it&#39;s elements. Additionally, free-weights maximally tax or stress muscles at specific degrees of joint angle associated with a given articulation dependent upon body position. 
     Another device of conventional equipment is tubing, which provides a single force vector that increases as one end is stretched from the other. This is, of course, owed to its elastic properties and offers an ever-changing magnitude of force until stretched beyond the elastic capabilities and plasticity is encountered. Because of the elastic properties of tubing the increasing and decreasing magnitudes of force often poorly match the capabilities of muscles opposing or controlling movement when attached to this apparatus. The magnitude of this force vector will continue to increase even when the muscles&#39; ability to create force decreases. Furthermore, as is the problem with the conventional equipment listed above and below, the vector created by stretching one end of the tubing from the other provides only one action line to be manipulated. 
     Similar in resistance characteristics to tubing is spring resistance, which also behaves in a manner by which one end of the spring is repositioned a greater distance from the other causing an increase in resistance to movement in that direction. The magnitude of the force vectors created using spring resistance behaves similar to the above mentioned tubing. This equipment also suffers from many other disadvantages such as its limited capabilities, bulkiness, makeshift construction, and overall misconception of operation. 
     Cable-pulley equipment with selectable weight stack provides only one vector force, respective to its attachment on the body and where the cable intermingles with the last pulley in the series of pulleys starting at the weighted stack. In many exercise positions, the resistance magnitude of this equipment poorly matches that which can be created in opposition by muscle force. This disproportion like that found when using free-weights can have numerous deleterious effects on structures of the musculo-skeletal system, and articulations and therefor has limited uses. 
     Cam-regulated pulley equipment, being an extension of the cable pulley systems, is very expensive to manufacture and places a enormous demand on the resources used for its&#39; construction. Furthermore, respective to above mentioned sentence the equipment is too expensive to purchase for most individuals. This type of exercise equipment requires much space and is specifically designed to oppose muscular contraction of only one or two muscle groups, thus limited in useful possibilities. Additionally, this equipment is very heavy and therefor hard to move or reposition. 
     Another device used to challenge the muscular skeletal system is hydraulic exercise equipment, which in the general sense is similar to Isokinetic Equipment in that the apparatus typically moves, when manipulated by the user, at a given speed though it&#39;s range of motion. In addition to being bulky, expensive, and single-use equipment provisions of resistance occurs only to the concentric contraction of the involved muscles, therefor being completely inadequate for achieving certain physiological responses. 
     Last of all, Isokinetic Equipment, which has several barriers to proper use. First and foremost, this equipment is, generally speaking, the most expensive per unit. Further restricting is the space required to store and use Isokinetic Equipment. In addition to these unfavorable conditions, the equipment generally requires some sort of power source for its&#39; operation. It is further limited by the skill one needs to operate this equipment Its most apparent use is testing and measuring specific force capabilities of involved musculature at various speeds of movement. 
     Equipment made available for use thus far does not make available more than one force vector to be manipulated and as such is at a distinct disadvantage. New equipment developed recently provides more than one vector of resistance but completely overlooks the significance of various directions of these force vectors as exemplified in U.S. Pat. No. 5,891,004 to Berry (1999) that offers a crude yet feasible example of coupling two vectors of resistance. Berry specifically addresses the attachment of tubing to a Olympic bar for the purpose of adding greater magnitudes of force to the equipment thus increasing resistance as the end of tubing attached to equipment is repositioned further from the other end. This invention adds a vector of resistance, matching the same direction as the vector of the bar, further promoting concerns and problems associated with overloading the skeletal and muscular systems. 
     Similar equipment from the last decade, and referred to in above patent to Berry, which makes variable resistance available by adding another vector of resistance is U.S. Pat. No. 5,029,849 to Nurkowski (1991) are very complicated and involve multiple steps for production and assembly. Additionally, this equipment is interconnected in makeshift fashion that creates a burden for changing equipment between exercise cycles and among individuals. Nevertheless, all equipment used to resist human motion heretofore known suffer from a number of disadvantages: 
     (a) Conventional equipment is bulky, therefore making most of the equipment hard to reposition for use with numerous muscle groups, and makeshift construction, of some equipment, burdens the user when changing equipment to match the needs of various muscle groups. 
     (b) The connection and disconnection of resistance equipment, having a force vector, to other equipment with force vector qualities is tedious, time-consuming, and restricting. 
     (c) If one uses a hydraulic type of equipment, resistance will oppose only concentric contractions of the skeletal muscular system. Which doesn&#39;t challenge or benefit muscles contracting eccentrically. 
     (d) Recently developed equipment requiring the specific use of tubing for one of the two force vectors opposing muscular contraction utilize a common linear direction of resistance or, in other words, both resistance vectors follow the same action line. Conversely, the action line of the involved muscle(s) as well as the muscle(s) strength capabilities is often mismatched in this situation. 
     (e) Conventional equipment having a singular vector of resistance offers only one change option (weight change) for providing resistance in opposition to muscular contraction. Because there is only one vector of resistance, the user has only one choice when challenging the muscular skeletal system. 
     (f) If one uses a selectorized weight machine, typically that machine supporting the user in many directions will dictate the path of motion the applied body-part will follow. This requires less effort from the stabilizing musculature when compared to exercises performed absent from rigid supporting structure and thus requiring the skeletal muscles to contract in an effort to brace the skeletal structure. Ultimately, specific internal stabilizing mechanisms would not have to work as hard if external structures are present and capable of supporting the body segments in a given position. 
     (g) Much of the equipment used today is excessively large for easy and convenient storage. 
     (h) Generally much of the equipment used to resist human movement is very expensive therefor being, confined for only those having the finances to purchase or gain access to this equipment. 
     (i) The equipment of present is limited to use for strength and conditioning purpose for which single direction vector resistance is applied in opposition of user motion. 
     (j) Equipment available to the general public rarely provides any, much less accurate, information about the risks, benefits, or procedures of utilizing such equipment. 
     (k) Some equipment requires electrical power to function properly, causing another expense and barrier to use. 
     (l) Conventional equipment provides therapeutic capabilities limited to that provided by a single action line having a limited number of uses. 
     (m) Some limitations that further obstruct usage are the complexity encountered when changing equipment among exercises in order to conditioning other muscle groups. 
     SUMMARY 
     In accordance with the present invention a method and a device for use with dumbbells, barbells, handles, or bars to provide a common connection of a plurality of force-vectors. The device comprising an object of predetermined size and weight having an attachment process for a handle, and an attachment process for an exercise instrument or articles of equipment having force vectors. 
     OBJECTS AND ADVANTAGES 
     Accordingly, besides the objects and advantages of the equipment described in my above patent, several objects and advantages of the present invention are: 
     (a) to provide a device which can be repositioned so that numerous exercises can be performed. 
     (b) to provide a device that can be easily attached and detached to different handles, dumbbells, barbells, or bars of various weights so that magnitudes of convergent force vectors can be changed independently. 
     (c) to provide a device that can be used to challenge or stress the muscular system while performing concentric, eccentric, and isometric contractions. 
     (d) to provide a device which offers the ability to change resistance load on a given muscle by the choices and positions of numerous vectors of resistance afforded by the connection of the invention to an exercise instrument such as a cable-pulley system or elastic tubing. 
     (e) to provide a device that is less restrained to any particular path of motion, therefore facilitating involvement of stabilizing musculature when moved throughout an exercise cycle. 
     (f) to provide a device which is compact and easy to store after use. 
     (g) to provide a device which is inexpensive to manufacture. 
     (h) to provide a device and method which can be used for numerous strength and conditioning protocols. 
     (i) to provide a device which can be utilized in, an educational format, to promote and enhance knowledge pertaining to human movement against resistance. 
     (j) to provide a method of resisting human movement without requiring an electrical power source. 
     (k) to provide a device which can be used as a therapeutic modality and having a therapeutic purpose. 
     (l) to provide a device which affords simple application of other force vectors when exercising various muscle groups. 
     Further objects and advantages are to provide an economical device that can be used by individuals, which places forces on the muscular-skeletal system, by providing a common place of attachment for a plurality of force vectors. Thus providing numerous options for the method and device to be used for therapy, sports conditioning, and general exercise use. Still further objects and advantages will become apparent from a consideration of the ensuing description and drawings. 
    
    
     DRAWING FIGURES 
     In the drawings, closely related figures have the same number but differ in alphabetic suffixes. 
     FIGS. 1A to  1 D shows various aspects of a device, having a handle with threads, and further depicting parts unconnected, also illustrating attachment to exercise instruments by half circles fixed to plates. 
     FIGS. 2A to  2 D shows various aspects of a device, where a socket heat screw is used to connect the device together. 
     FIGS. 3A to  3 D shows multiple aspects of a device utilizing an eyebolt for the connection of the device and the attachment to other exercise instruments. 
     FIGS. 4A to  4 B shows a similar device with an eyebolt providing connection of individual parts and containing a cutout of the plate for which the lanyard can pass by and secure to the eyebolt. 
     FIGS. 5A to  5 D shows a device with hexagonal plates that are threaded onto the handle following the insertion of a swivel socket into the plate, which will provide a source of connection to other exercise equipment. 
     FIGS. 6A to  6 D shows a similar device with the alteration consisting of the connection method between plate and handle which is depicted by a bridgeable threaded rod that screws into the handle and the plate. 
     FIGS. 7A to  7 D shows a device that connects plates to handle by a socket head screw also having a hole in the plates for which a lanyard can pass through and be secured to the device. 
     FIGS. 8A to  8 B shows a device in a solid casting version. 
     FIGS. 9A to  9 C shows a apparatus that is made out of rigid material and is placed on to conventional equipment, in this case a hexagonal dumbbell. 
     FIG. 10 shows a apparatus that is made out of flexible material and is fastened to a handle of conventional equipment such as in this figure a conventional hexagonal plated dumbbell. 
     FIG. 11 shows a isometric animation of a human body holding the device shown in FIGS. 1A-1D with the method of utilizing the device in a exercise cycle having the bottom (dashed) and top (solid) position of a arm curl exercise. 
    
    
     REFERENCE NUMERALS IN DRAWINGS 
     
       
         
           
               
               
             
               
                   
               
             
            
               
                 20 
                 knurled handle 
               
               
                 22 
                 smooth handle bulkhead 
               
               
                 24 
                 smooth spindle 
               
               
                 26 
                 small external threaded end 
               
               
                 28 
                 small threaded hole 
               
               
                 30 
                 large external threaded end 
               
               
                 32 
                 large threaded hole 
               
               
                 34 
                 handle-side exterior threaded rod 
               
               
                 36 
                 lockdown nut 
               
               
                 38 
                 plate-side exterior threaded rod 
               
               
                 40 
                 plastic washer 
               
               
                 42 
                 plastic thin washer 
               
               
                 44 
                 metal thin washer 
               
               
                 46 
                 round plate center through hoie 
               
               
                 48 
                 hexagonal plate threaded hole 
               
               
                 50 
                 hexagonal swivel socket foramen 
               
               
                 52 
                 round plate 
               
               
                 54 
                 round plate with edge through hole 
               
            
           
           
               
            
               
                 Convergent Vector Resistance Device and Method 
               
            
           
           
               
               
            
               
                 56 
                 hexagonal plate with cutout 
               
               
                 58 
                 hexagonal plate 
               
               
                 60 
                 hexagonal plate with top opening 
               
               
                 62 
                 counter-bore 
               
               
                 64 
                 hexagonal plate foramen 
               
               
                 66 
                 plastic washer 
               
               
                 68 
                 metal washer 
               
               
                 70 
                 socket head cap 
               
               
                 72 
                 socket head screw exterior thread 
               
               
                 74 
                 shaft 
               
               
                 76 
                 socket head screw 
               
               
                 78 
                 eyebolt external threads 
               
               
                 80 
                 eyebolt 
               
               
                 82 
                 half-ring 
               
               
                 84 
                 diagonal though hole 
               
               
                 86 
                 swivel socket 
               
               
                 88 
                 threaded-hole of swivel socket 
               
               
                 90 
                 lanyard and swivel socket connected 
               
               
                 92 
                 hexagonal plate though hole 
               
               
                 94 
                 spring clip 
               
               
                 96 
                 crimped threaded link 
               
               
                 98 
                 metal-ball 
               
               
                 100 
                 crimped ring connector 
               
               
                 102 
                 common lanyard crimped ring connector 
               
               
                 104 
                 lanyard 
               
               
                 106 
                 common lanyard crimp 
               
               
                 108 
                 solid casting 
               
               
                 110 
                 top half-ring 
               
               
                 112 
                 bottom half-ring 
               
               
                 114 
                 top half-ring through hole 
               
               
                 116 
                 bottom half-ring threaded hole 
               
               
                 118 
                 socket screw 
               
               
                 120 
                 standard dumbbell 
               
               
                 122 
                 dumbbell attached to apparatus 
               
               
                 124 
                 cable-pulley apparatus 
               
               
                 126 
                 human animation 
               
               
                 128 
                 flexible strapping 
               
               
                 130 
                 large D-ring 
               
               
                 132 
                 small D-ring 
               
               
                   
               
            
           
         
       
     
     DESCRIPTION—FIGS 
     Preferred Embodiment 
     FIG. 1A is a exploded isometric view of my invention. The device having a knurled handle  20  with surface sufficient for gripping that has on its ends a smooth handle bulkhead  22  which serves as a bulkhead for parts placed adjacent to it. A smooth spindle  24  protruding longitudinally from handle FIG.  20  and having a small external threaded end  26  which has a plastic washer  40  that is passed over and positioned against  22 . Additionally, the device has a round plate  52  including a half ring  82 , and a round plate center through hole  46  which is positioned onto  24  and placed adjacent to washer  40 . Plate  52  has a counter-bore  62 , which accommodates a plastic washer  66  at its adjacent surfaces. Furthermore, a metal washer  68  is positioned over  26  and  24  and adjacent to  66 , also having a socket head cap  70  attached to  26  and positioned adjacent to  68  securing the assembly of the device. Ultimately, elements of the preferred embodiment are made of rigid material such as steel. However, the elements can be made of any material such as plastic, rubber, metal, and other common or exotic materials so that shape will not be distorted when external force is applied to it or the underlying intention of the invention is not sacrificed. 
     FIGS. 1B and 1C are views showing the device and individual parts connected together. FIG. 1B shows an end view while FIG. 1C is a partial cross-sectional view of the device 
     FIG. 1D is perspective view detailing an intermediary attachment device that will connect the invention to an exercise instrument. This apparatus includes a spring clip  94  connecting  82  to a crimped ring connector  100  on a lanyard  104 . 
     This lanyard is attached to the other lanyard arising from the other round plate by a common lanyard crimp  106 . From this lanyard crimp arises a common lanyard crimped ring connector  102  which ultimately end in a connection by another quick link to an exercise instrument such as a cable-pulley machine or resistance tubing. 
     FIGS.  2 - 9 —Additional Embodiments 
     Additional embodiments are shown in FIGS.  2 , 3 , 4 , 5 , 6 , 7 , and  8  wherein each case the device is shown connected and disconnected in its elements with a multitude of parts in a variety of shapes and sizes. In FIG. 2A the handle contains a small threaded hole  28  through which is exposed at smooth handle bulkhead  22 . Following in reverse order of connection as the preferred embodiment excluding entirely parts  24  and  26 , a socket head screw  76  having a shaft  74 , and a socket head screw exterior thread  72  is placed though  68 , 66 , 52 , 40 , and screwed into  28 . 
     FIGS. 2 b  and FIG. 2 c  are perspective views showing the device and individual parts connected together. FIG. 2B shows an end view while FIG. 2C is a cross-sectional view of the device. FIG. 2 d  is a perspective view of the assembled and connected version of the additional embodiment similar to view  1   d  of the preferred embodiment. 
     FIG. 3A is an embodiment similar to that found in FIGS. 1 a - 1   d  as well as the previous. Alterations include a eyebolt  80  having a eyebolt external threads  78  that passes centrally through a round plate with edge through hole  54  an diagonal through hole  84 . The connection of the device is the same as the previous embodiment with the exchange of the socket screw for the eyebolt. The through-hole allows the lanyard to pass through the plate and attach to the eyebolt by spring clip  94  device described in the preferred embodiment and shown in FIG. 1 d . FIG. 3 b  is an end view, while FIG. 3 c  is a cross-sectional view with the lanyards attached to the eyebolts. FIG. 3 d  is a perspective view of the attachment. 
     FIG. 4A is a perspective view of an exploded assembly similar to the previous embodiment. This embodiment has a hexagonal plate with cutout  56  and is connected to the handle by the eyebolt just like the previous embodiment. FIG. 4B is a perspective view of the device connected together and attached to the lanyards by the spring clips. 
     FIG. 5A is the exploded assembly view of an additional embodiment consisting of handle  20  and a hexagonal plate  58  with a hexagonal swivel socket foramen which houses a swivel socket  86  having a threaded hole of swivel socket  88 . The handle having a large external threaded end  30  is secured to hexagon plate  58  by screwing it into a hexagonal plate threaded hole  48 . Frictional wear of handle and plate is hindered by a plastic thin washer  42  that is adjacent to the handle, and a metal thin washer  44  which can be placed adjacent to the plate. The device utilizes an intermediary for connection and is attached to another exercise instrument by a crimped threaded link  96 , which is attached to lanyard  104 . FIG. 5B is a perspective view of the invention connected by the individual parts. FIG. 5C is an end view showing a lanyard and swivel socket connection  90  and FIG. 5D being the partial cross-sectional view of  5 C, illustrating the internal components and the connection of individual parts. 
     FIG. 6A depicts an embodiment similar to that shown in views  5 A- 5 D. However, this embodiment details a large threaded hole  32  in the handle. Connecting hexagonal plate  58  to handle  20  is a plate-side exterior threaded rod  38  and a handle-side exterior threaded rod  34  separated and connecting the two together in the middle by a lockdown nut  36 . The remaining parts being the same as those in the previous embodiment. FIG. 6B is shown as an assembled perspective view followed by FIG.  6 C and FIG. 6D of an end view and cross-sectional view respectively. 
     An additional embodiment is displayed in FIG. 7A, which is in exploded assembly view This device has a small threaded hole  28  in the handle that accepts socket head screw exterior thread  72  of socket head screw  76 . This socket head screw has shaft  74  that is placed through metal washer  68  and then through plastic washer  66  which is then adjacent to the previous washer as well as a hexagonal plate with top opening  60 . In hexagonal plate with top opening  60  there is a hexagonal plate foramen  64 , through which the socket head screw can pass, and once through the plate can pass through plastic washer  40  and screw into the handle thereby connecting the plate to the handle. Plate  60  has a hole  92  that allows lanyard  104  to be passed through it and into the space created by hexagonal plate foramen  64 . From here a metal ball  98  is screwed onto crimped threaded link  96  whereby attaching the lanyard to the device. FIG. 7B is a perspective view of the connected version illustrating the lanyards fixed into the holes. FIG.  7 C and FIG. 7D are end and cross-sectional views respectively. 
     FIG. 8A is a perspective view of an additional embodiment pertaining to a solid casting  108  of the device. FIG. 8B is a perspective view of this device attached to lanyards that will ultimately be connected to another exercise instrument. 
     FIGS.  9 - 10 —Alternative Embodiments 
     There are numerous possibilities with regard to relative disposition and shape of the apparatus and its parts, as illustrated in FIGS. 9 and 10, which presents perspective exploded, cross-sectional, and assembled views. 
     FIG. 9A is an exploded assembly view of an alternative embodiment. This apparatus utilizes the lanyard as an intermediary by passing it through a top half-ring  110  thereafter being secured by metal ball  98  that is positioned onto the lanyard as described in previous FIGS. 7A-7D. Adjacent to top half-ring  110  a bottom half-ring  112  is positioned and secured to it by passing a socket screw  118  by a top half-ring through hole  114  and tightening the socket screw into a bottom half-ring threaded hole  116  in bottom half-ring  112  is a perspective view showing a dumbbell attached to apparatus  122  and the lanyard for the eventual connection to an exercise instrument. FIG. 9C is a cross-sectional view of the apparatus held together by the socket screws with the lanyard secured to the top half ring by the metal ball. 
     FIG. 10 is a perspective view of the apparatus taking the form of a flexible strapping  128  with a large D-ring  130  on one end and a small D-ring  132  on the other. In this figure it can be seen that the flexible material meshes with the handle on the dumbbell. A secure fit is obtained when the handle is wrapped with the sheath portion of the apparatus and the small D-ring is passed through the large D-ring. The small D-ring provides the connection site for the spring-clip to the exercise instrument of choice. 
     FIG.  11 —Method of connection and utilization 
     FIG. 11 is a perspective isometric view of an animated exercise cycle having a human animation  126  performing a biceps curl with the preferred embodiment attached to the exercise instrument of choice, in this case a cable pulley apparatus  124 . Here the biceps curl is shown with a bottom and top position with a solid line depicting one position in tile movement and a dashed line indicating another. 
     Advantages 
     From the description above, a number of advantages of my multiple vector resistance device become evident: 
     (a) The device can be repositioned so that numerous exercises can be performed. 
     (b) The device can be easily attached and detached to different handles, dumbbells, barbells, or bars of various weights so that magnitudes of convergent force vectors can be changed independently and easily. 
     (c) The device can be used to challenge or stress the body by providing resistance to isometric, concentric and eccentric muscle contractions 
     (d) The device offers the ability to change resistance load on a given muscle by opting to change either the magnitude or angles of the vectors of resistance together or independently, therefore increasing the users options for resistance training as compared to conventional equipment. 
     (e) Additional benefits can be found when utilizing the device in a unrestrained matter particularly without an external support structure which may dictated the path of motion and range of motion thereby decreasing the involvement of stabilizing musculature. 
     (f) The device is compact and easy to store after use resulting in minimal space consumption. 
     (g) The device being inexpensive to manufacture when compared to its numerous uses. 
     (h) A multitude of strength and conditioning protocols can be extracted from the device and its method of use. 
     (i) The device can be utilized, in a educational format, to promote and enhance knowledge pertaining to human movement against resistance including injury prevention and management. 
     (j) The device and method of resisting human movement does not require any electrical power source. 
     (k) The device can be used as a therapeutic modality and having a therapeutic purpose, which may provide numerous advantages to those injured or suffering ailments. 
     (l) The device affords simple application of other force vectors when exercising various muscle-groups so that the user can efficiently exercise without wasting time and energy between exercise cycles. 
     Operation—FIG. 11 
     The manner of using the convergent vector resistance equipment is not unlike the use of free-weights, elastic tubing, or selectable-cable-pulley equipment when used independently. The uniqueness being born from the connection of these devices and then ultimately manipulated by the user either for human performance, rehabilitation, health, or fitness purposes. Thus, the combination of multiple resistance vectors facilitates numerous options for the user, and when used in opposition of movement will promote various physiological changes, and supply a variety of possibilities for the user and intended use. The invention makes possible the connection for these exercise instruments onto the common unit of attachment also referred to as handle  20  shown in all figures with the “A” suffix. Once assembled as shown in FIGS. 1-10 detailing the individual pieces of each embodiment the device must then be connected to lanyard  104  by spring clip  94  or some quick link fastener (shown in previous figures with “D” suffix). Manipulation by user during the exercise cycle is shown by human animation  126  depicting an exercise known as the biceps curl detailing movement through a range of motion between the solid and dashed lines about the elbow axis. 
     The attachment of the device is made possible by assembling the preferred embodiment. Once the device is secure an intermediary connection between the device and the chosen exercise instrument, shown in this figure to be cable-pulley-system  124 . This intermediary apparatus comprises the lanyard connected at both ends by a spring clip but could also consist of any attachment that would enable a secure connection between the device and exercise instrument. 
     From this figure it can be understood how the invention provides the opportunity to place resistance against human motion in numerous manners. For example, using the aforementioned figure imagine that the dumbbell being held in the hand of the user is b  10  lbs., and the magnitude of the exercise instrument connected and pulling on the dumbbell is also 10 lbs. If the action lines of these two vectors is at 45° from each other the resulting action line of the combined vectors or convergent vectors would lye directly between or 22.5° from each. Furthermore, if the magnitude of the equipment is unequal, or the angles of the vectors are changed the resistance forces will change and the result will require a different response from the users muscular-skeletal system when moving the resistance. 
     Conclusion, Ramifications, and Scope 
     Accordingly, the reader will see that the device of the invention facilitating a common place of attachment for multiple vectors offorce will provide numerous possibilities to the user of such equipment. Many of such possibilities will become apparent when the device is used methodically for physical rehabilitation, sports medicine, injury prevention, and health/fitness exercise. 
     It can be repositioned so that numerous exercises can be performed. 
     It can be easily attached and detached to different handles, dumbbells, barbells, or bars of various weights so convergent force vectors can be changed independently and easily. 
     It can be used to challenge or stress the body by providing resistance to isometric, concentric and eccentric muscle contractions 
     It offers the ability to change resistance load on a given muscle by the magnitudes and various positions of the resistance vectors thereby reducing the limitations of use imposed by conventional equipment. 
     It offers additional physiological benefits when the user utilizes equipment in an unsupported matter or without external support structure that directs the path and range of motion whereby decreasing involvement of stabilizing musculature. 
     It is compact and easy to store after use resulting in minimal space consumption. 
     It is relatively inexpensive to manufacture when compared to its counterpart when considering its numerous uses. 
     It provides a forum from which a multitude of strength and conditioning protocols can be found. 
     It can be utilized, in an educational format whereby experts in the field of exercise, health sports medicine, and rehabilitation can promote and enhance knowledge pertaining to human movement against resistance. 
     It does not require any electrical power source for its operation. 
     It can be used in a therapeutic modality and having a therapeutic purpose, which may provide numerous advantages to those injured or suffering ailments. 
     It offers simple application of other force vectors when exercising various muscle-groups so that exercise time can be efficient. 
     While my above description contains numerous specificities, these should not be construed as limitations on the scope of the invention, but rather as an exemplification of some of the presently preferred embodiments thereof. Many other variations are possible. For example the invention could be manufactured in common and exotic materials, untested embodiments, and come in various colors, shapes, forms, and designs including substitutions of individual parts and the order in which they are interchanged. Therefor, the scope of the invention should be determined not by the embodiment(s) illustrated, but by the appended claims and their legal equivalents.