Abstract:
A device for exercising abdominal muscles comprising a platform having an upper surface and a lower surface adapted for omni-directional motion, a pair of generally longitudinal limb supporting areas positioned on said upper surface, a pair of lateral hand grips each of said pair extending from the upper surface of the platform and disposed in opposed relation laterally and outwardly from one of said limb supporting areas, and a front hand grip extending from the upper surface of the platform and disposed generally forward of the limb supporting areas. Methods for using this device are also disclosed.

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
     The present invention relates to exercise devices and more particularly, to exercise devices which are rolled or slid across a surface by the user. Still more particularly, the present invention relates to devices for exercising the abdominal muscles. 
     2. Background Information 
     In the exercise of abdominal muscles, it has commonly been the practice to perform such exercises along the range of motion which coincides with the centerline of the exerciser&#39;s body. Conventional sit-up and crunch exercises are examples of exercises which tend to follow the centerline of the exerciser&#39;s body. A number of prior art exercise devices also restrict abdominal exercises to this plane of motion. Such exercises may have disadvantages in that they do not exercise all the major abdominal muscle groups; the transverse, the rectus, and the oblique. 
     U.S. Pat. No. 3,589,720 to Agamian, for example, discloses an exercise apparatus having a hand rail carriage, a foot slider carriage and longitudinal track guide means along with the hand rail carriage and foot slider carriage are slidable relative to one another. This apparatus may also include means for retaining an adjustable drag or resistance between the hand rail carriage and the foot rail carriage. 
     Another exercise device which restricts the user&#39;s motion generally to the plane of the centerline of the user&#39;s body is U.S. Pat. No. 5,921,901 to Palacios. This patent discloses a push-pull type of exercise device for exercising a person&#39;s abdominal muscles including a track unit formed by a track board having an upper, body supporting surface extending between front and rear ends; and elongate, track-supporting base board for extending horizontally across a floor; a knee support on the base board adjacent the rear end of the track board; and, a support member for supporting the track board pivotally connected to overlie the base board at selected elevations. A hand-grip carriage unit with a pair of hand grips and an elbow support aligned rearward of the supporting surface for reciprocal rolling movement therealong. An anchoring unit for a person&#39;s legs or hands, alternatively, is releasably mounted to the front end of the track board, when elevated. 
     Other abdominal exercise devices, while not strictly limiting the user&#39;s motion to the plane of the centerline of his/her body, are based on a wheel and axle arrangement which requires the user to grip the lateral handles with his/her hands and move the wheel back and forth. While such arrangements do not prohibit a lateral motion, they are not easily adapted to allow the user to move in a forward and rearward path which is angularly disposed to the centerline of his/her body. Furthermore, such devices generally require the user to grip handles immediately adjacent to the wheel which are collinear with the axis of the wheel. 
     An example of such a wheeled exercise device is U.S. Pat. No. 3,752,475 to Ott which discloses an exercise wheel which is rotatable about a generally central axis. A spring is operatively associated with the wheel and axle increasing resisting rotation of the wheel. 
     Another wheel and axle exercise device is disclosed in U.S. Pat. No. 6,017,296 to Tang, et al. In this device, a housing is provided with a receiving compartment, a grip rod which is put through the housing such that both longitudinal ends thereof are left out in the outerside of the housing, a main wheel rotatably mounted on the grip rod such that the main wheel is located in the receiving compartment of the housing, two auxiliary wheel sets pivoted in the housing such that they are linked with the main wheel, and at least one elastic recovery device disposed between the main wheel and the housing for providing the main wheel with a recovery force enabling the main wheel to return to its original angular position. 
     An exercise device for the abdominal muscles which appears to facilitate motion, not only along the centerline of the user&#39;s body, but along paths angularly disposed to the left and right of such centerline is disclosed in U.S. Pat. No. 3,809,393. This patent discloses an exercise device in the form of a handle supported by at least three swivel castors and adapted to be moved about the floor while supporting the upper body of the person in use. The handle defines a longitudinal axis around which the swivel castors are symmetrically disposed. While this patent appears to allow a certain degree of lateral motion, it appears to have a grip for only one hand. Two devices, therefore, appear to be required for its use. In exercising with such a device, the user forgoes the possibility of having one hand support the other. 
     A need, therefore, exists for a simple, inexpensive and easily stored device for exercising abdominal muscles which can be easily gripped by the user with two hands to allow front and back motion not only along the plane of the centerline of the user, but along directions of motions disposed angularly to the left and the right of that centerline. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a device for exercising abdominal muscles which is adapted to use both along the plane of the centerline of the user and to the left and right of such centerline to exercise all of the major abdominal muscle groups. 
     It is a further object of the present invention to provide such an exercise device which the user may grip with both hands in a mutually supporting manner. 
     It is a further object of the present invention to provide an exercise device which is adapted to a number of different exercises in a number of alternate positions so as to allow the user to exercise the full range of his/her abdominal muscle groups and other muscles and to provide him/her with a variety of enjoyable exercise routines. 
     It is another object of the present invention to provide an exercise device which may be easily and inexpensively manufactured. 
     It is still another object of the present invention to provide an exercise device which may be used in the home and easily stored in a space efficient manner when not in use and which is adapted to be easily carried when the user is traveling. 
     This and other objects and advantages of the present invention will be apparent from the present invention which is a device for exercising abdominal muscles of a user comprising a freely movable platform having an upper surface and a lower surface. The device is adapted to be moved on said lower surface, and there are handles on said upper surface for allowing the user to grip said platform with both of his/her hands. 
     Also encompassed by the present invention is a device for exercising abdominal muscles comprising a platform having an upper surface and a lower surface adapted for omni-directional motion, a pair of generally longitudinal limb supporting areas positioned on said upper surface, a pair of lateral hand grips each of said pair extending from the upper surface of the platform and disposed in opposed relation laterally and outwardly from one of said limb supporting areas, and a front hand grip extending from the upper surface of the platform and disposed generally forward of the limb supporting areas. 
     The present invention also encompasses a method for a person to exercise abdominal muscles comprising the steps of first providing a platform having an upper surface and a lower surface, wherein said upper surface has hand receiving means for both of said hands or forearm receiving means of both of said forearms of said person and said lower surface is adapted for motion on said substrate in a plurality of directions. Then the person engages the hand receiving means with both of his/her hands or engages the forearm receiving means with both of his/her forearms and positions his/her knees in a stationary position on the substrate in an arched back position. The person then moves the platform on the stationary substrate in a forward direction generally coplanar with his/her body centerline to an extended back position. The person then moves the platform on the stationary substrate in a rearward direction generally opposite from the direction traveled in step to an arched back position. The person then moves the platform on the stationary substrate in a forward direction generally opposite to said direction traveled in the previous step. The person then moves the platform on the stationary substrate in a generally forward direction which is angularly disposed to the direction traveled in the previous step and to the centerline of his/her body to an extended back position. The person then moves the platform on the stationary substrate in a rearward direction generally opposite to the direction traveled in a previous step to an arched back position. Preferably the person then moves the platform angularly forward to the opposite side of the centerline of his/her body and then rearwardly again. 
     Also encompassed by the present invention is another method for exercising abdominal muscles in which a platform having an upper surface and a lower surface and where on the upper surface has knee receiving means is provided. The person positions his/her hands or forearms on a stationary surface and positions his/her knees on the knee receiving means and assumes an arched back position. The person then moves the platform in a direction rearwardly, generally coplanar with his/her body&#39;s centerline to an extended back position. The person then moves the platform forward on the stationary substrate with his/her knees in generally an opposite direction to return to an arched back position. The person then moves the platform on the stationary substrate in a generally rearward direction which is angularly disposed to the centerline of the person&#39;s body to an extended back position. The person then moves the platform on the stationary substrate in a forward direction opposite to the angularly disposed position to an arched back position. Preferably, the person then moves the platform angularly rearwardly to the opposite side of his/her body&#39;s centerline and then forwardly again. 
     Also encompassed within the present invention is a method of exercising abdominal muscles in which a person engages the hand receiving means on the platform with both of his/her hands or engages the forearm receiving means with both of his/her forearms and positions his/her knees on knee receiving means on the second platform. From an arched back position, the first platform is extended in a forward direction and the second platform is extended in a rearward direction to a generally extended body position. The person then moves the first platform rearwardly and the second platform forwardly to again achieve an extended back position. From this position, the user moves the first platform rearwardly and the second platform forwardly to an arched back position. 
     Also encompassed within the scope of the present invention is a method in which the user positions his/her hands or forearms on the platform while the knees are positioned on the stationary substrate. The person then moves the platform laterally in one direction and then laterally in a reversed direction, preferably in an arcuate motion. 
     Also encompassed with the present invention is a method in which the person positions his/her hands or forearms on a stationary substrate and positions his/her knees on the platform. While maintaining his/her hands or forearms in a stationary position, the platform is moved laterally to one direction and then in the opposite direction, preferably in an arcuate motion. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The preferred embodiment of the invention, illustrative of the best mode in which applicant contemplated applying the principles, is set forth in the following description and is shown in the drawings and is particularly and distinctly pointed out and set forth in the appended claims. 
     FIG. 1 is a top perspective view of an exercise device which is a preferred embodiment of the present invention; 
     FIG. 2 is a top plan view of the exercise device shown in FIG. 1; 
     FIG. 3 is a bottom perspective view of the exercise device shown in FIG. 1; 
     FIG. 4 is a bottom plan view of the exercise device shown in FIG. 1; 
     FIG. 5 is a front end view of the exercise device shown in FIG. 1; 
     FIG. 6 is a cross sectional view through  6 — 6  in FIG. 2; 
     FIG. 7 is a cross sectional view through  7 — 7  in FIG. 2; 
     FIGS. 8A,  8 B and  8 C are sequential perspective views of a person using the exercise device shown in FIG. 1 which demonstrate its method of use; 
     FIGS. 9A,  9 B and  9 C are sequential perspective views of a person using the exercise device shown in FIG. 1 which demonstrate its method of use in an alternate preferred way; 
     FIGS. 10A-10C are schematic illustrations of an alternate preferred method of using the exercise device shown in FIG. 1; 
     FIGS. 11A-11C are schematic illustrations of an alternate preferred method of using the exercise device shown in FIG. 1; 
     FIGS. 12A-12C are schematic illustrations of an alternate preferred method of using the exercise device shown in FIG. 1; 
     FIGS. 13A-13C are schematic illustrations of an alternate preferred method of using the exercise device shown in FIG. 1; 
     FIG. 14 is a top plan view of an exercise device representing an alternate preferred embodiment of the present invention; 
     FIG. 15 is a bottom plan view of the exercise device shown in FIG. 14; 
     FIG. 16 is a cross sectional view through  16 — 16  in FIG. 14; and 
     FIG. 17 is a cross sectional view through  17 — 17  in FIG.  4 . 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1-7, the device shown generally at numeral  10  comprises a platform  12  having an upper surface  14  and a lower surface  16 . At the sides of the platform  12 , lateral raised sections  18  and  20  extend upwardly and outwardly. Lateral raised section  18  and  20  have respectively lateral apertures  22  and  24  which form respectively lateral hand grips  26  and  28  on the lateral raised sections  18  and  20 . Also extending upwardly and outwardly from the upper surface  14  there is a front arc  30  on which there are opposed front hand grips  32  and  34 . Adjacent the lateral raised section  18  on the upper surface there is a recessed limb support area  32  on which a limb support pad  38  is superimposed. Adjacent the lateral raised section  20  on the upper surface  14  there is a recessed limb support area  40  on which a limb support pad  42  is superimposed. On the upper surface  14  there is also a front recessed hand support area  44  on which a front hand pad  46  is superimposed. On the lower surface  16  of the platform  12  there is an attachment recess  48  on which a sliding attachment  50  is attached. 
     This sliding attachment  50  has an interior central recess  52  which has an upwardly sloped peripheral wall  54 . An inner shoulder  56  extends concentrically outwardly from the upwardly sloped peripheral wall  54 . At the outer peripheral edge of the slide attachment  50 , there is a peripheral rim  58 . The sliding attachment  50  is fixed to the platform  12  by means of plastic fasteners  60 ,  62  and  64  which extend through this peripheral rim  58 . On the lower side of the sliding attachment  50 , there is a central sliding surface  66  with a peripheral downwardly sloped surface  68  interposed between the central sliding surface  66  and the peripheral rim  58 . The entire sliding attachment rests on a recessed base surface  70  on the platform  12 . On the lower surface  16  of the platform  12 , there are also lateral ridge recesses  72 ,  74 ,  76  and  78 . There are also front recesses  80  and  82  on the lower surface  16  of the platform  12  as well as bottom base recesses  84 ,  86  and  88 . 
     It will be understood that the use of the sliding attachment  50  is optional, and that this attachment  50  may be removed by removal of the fasteners  60 ,  62  and  64 , and the device  10  used in the same way as is otherwise described. In general, there will be more resistance to movement of the device  10  by the user when the sliding attachment  50  is used and less resistance when the attachment  50  is not used. 
     Referring to FIGS. 8A-8C, a method of using the device described above is illustrated. In this method, the device  10  is positioned on a sheet polyethylene or polypropylene mat shown generally at numeral  90 . This mat  90  has a narrow base  92  with outwardly extending oblique sides  94  and  96  and a widened front side  98 . A kneepad  100  is positioned on the mat  90  adjacent the narrow base side  92 . A user  102  positions his/her forearms  104  and  106  respectively on the forearm receiving pads  36  and  38 . The user  102  is thereby able to grip hand grips  32  and  34  on the front arc  30  with his/her hands  108  and  110 , respectively. The user&#39;s knees  112  and  114  remain in a stationary position on the kneepad  100 . In the first step in the method of using the device  10 , the user moves forward generally in the direction of the centerline of his/her body as at arrow  116  in FIG.  8 A. At the completion of this step  102 , the user will have extended his/her body from the arched back position shown in FIG. 8A to the extended, nearly prone position shown in FIG.  8 B. Once having reached the extended, nearly prone position shown in FIG. 8B, the user then slides the device rearwardly in the direction of arrow  118  along the centerline of his/her body until the arched back position shown in FIG. 8C is reached. Upon reaching this arched back position, the user then extends the device laterally and forwardly to the right of the centerline of his/her body in the direction of arrow  120 A until the extended nearly prone position is again reached after which the user again slides the device  10  rearwardly in the direction of arrow  120 B to the arched back position. The user then again extends the device  10  in a forward direction along the centerline of his/her body in the direction of arrow  122 A. After the extended, nearly prone position is reached, the user then again moves the device  10  rearwardly in the direction of arrow  122 B to the arched back position. Next, the user extends the device  10  forwardly and laterally at an angle to the left of arrow  122 A in the direction of arrow  124 A. Again, when the extended nearly prone position is reached, the user moves the device rearwardly in the direction of the reverse arrow  124 B. This entire sequence may be repeated a plurality of times. 
     Referring to FIGS. 9A-9C, another method of using the device described above is illustrated. In this method, the device  10  is positioned on a sheet polyethylene or polypropylene mat shown generally at numeral  90 . A kneepad  100  is positioned on the mat  90  adjacent the narrow base side  92 . A user  102  assumes an arched back position and extends his/her forearms  104  and  106  downwardly. The user  102  is thereby able to grip hand grips  26  and  28  on lateral raised sections  18  and  20  respectively with his/her hands  108  and  110 , respectively. The user&#39;s knees  112  and  114  remain in a stationary position on the kneepad  100 . In the first step in the method of using the device  10 , the user moves forward generally in the direction of the centerline of his/her body as at arrow  126 A in FIG.  9 A. At the completion of this step, the user  102  will have extended his/her body from the arched back position shown in FIG. 9A to the extended, nearly prone position shown in FIG.  9 B. Once having reached the extended, nearly prone position shown in FIG. 9B, the user then slides the device rearwardly in the direction of arrow  126 B along the centerline of his/her body until the arched back position shown in FIG. 9C is reached. Upon reaching this arched back position, the user then extends the device laterally and forwardly to the right of arrow  126 A and the centerline of his/her body in the direction of arrow  128 A until the extended nearly prone position is again reached after which the user again slides the device  10  rearwardly in the direction of arrow  128 B to the arched back position. The user then again extends the device  10  in a forward direction along the centerline of his/her body in the direction of arrow  130 A. After the extended nearly prone position is reached, the user then again moves the device  10  rearwardly in the direction of arrow  130   b  to the arched back position. Next, the user extends the device  10  forwardly and laterally at an angle to the left of arrow  130 A and the centerline of his/her body in the direction of arrow  132 A. Again, when the extended, nearly prone position is reached, the user moves the device rearwardly in the direction of the reverse arrow  132 B. 
     Referring to FIGS. 10A-10C, still another method of using the device of the present invention to exercise abdominal muscles is illustrated. In this method, the user positions the lower part of his/her body on the device  10  so that his/her knees  112  and  114  and shins  130  and  132  are on the limb support areas  36  and  38  of the device respectively as is particularly shown in FIGS. 10A and 10B. The front part of the body of the user  102  is stationary so that, for example, his/her forearms  104  and  106  rest on a stationary surface  134 . As is shown in FIG. 10C, an alternative method for performing this exercise would be for the user to place his/her hands as at hand  108  on the surface  134 . In performing the exercise according to this method, the user would first slide the device  10  rearwardly and laterally in the direction of arrow  136 A. After the device  10  has been extended to a position where the user is in a nearly prone position, the user slides the device  10  inwardly and forwardly in the direction of arrow  136 B. The user then extends the device  10  rearwardly along the centerline of his/her body in the direction of arrow  138 A, and after the device has been extended to its rearward position, the user slides the device inwardly in the direction of arrow  138 B. After this arched back position has again been reached, the user  102  slides the device  10  rearwardly and laterally in the direction of arrow  140 A, and after the device has been extended it is slid inwardly and forwardly in the direction of arrow  140 B. This sequence of moving the device rearwardly along the centerline of the user&#39;s body, as well as to the left and right of the centerline of his/her body may be repeated a plurality of times. 
     Another method of using the device  10  is shown in FIGS. 11A-11C. Referring particularly to FIGS. 11A and 11B, a user  102  may position his/her forearms  104  and  106  on the limb support areas  32  and  38  respectively of the device  10 . The user would also grip front hand grips  32  and  34  in the way described above. In this method, the user also places the lower half of his/her body on a second device  142  which is substantially identical to device  10  so that his/her knees  112  and  114  and shins  130  and  132  would be positioned in the way described above in connection with FIGS. 10A and 10B. The user would then move from an arched back position as is shown in FIG. 11B to an extended, nearly prone position by moving device  10  in the direction of arrow  144  and device  142  in the direction of arrow  146 . After both devices have been extended, the user would then move device  10  inwardly in the direction of arrow  48  and device  142  inwardly in the direction of arrow  150  until he/she reached the arched back position shown in FIG. 11B again. It will be understood that this exercise may be repeated a plurality of times. It will also be understood that rather than resting his/her forearms  104  and  106  on the device  10  as is shown in FIGS. 11A and 11B, the user  102  may alternatively grip the device  10  with his/her hands  108  on handgrips as at handgrip  24 . 
     Another method of using the device  10  to perform an abdominal exercise is shown in FIGS. 12 a - 12   c.  Referring particularly to FIGS. 12A and 12B, the user would grip the front hand grips  32  and  34  and rest his/her forearms  104  and  106  respectively on the limb supports  36  and  40  respectively of the device  10 . The user&#39;s knees  112  and  114  and shins  130  and  132  would be stationarily positioned on surface  134 . With the front part of his/her body, the user  102  would then slide the device  10 , first laterally to the left in an arcuate path in the direction of  152 A and then laterally to the right in an arcuate path in the direction of  152 B. This motion may be repeated a plurality of times. It will also be appreciated that instead of positioning his/her forearms as at  104  and  106  on the device, the user  102  can grip the lateral hand grips as at grip  24  with his/her hands as at hand  108  on the device  10  as is shown in FIG.  12 C. The method of performing this exercise would be the same thereafter as is illustrated in FIGS. 12A and 12B. 
     Another method of performing abdominal exercises with device  10  is illustrated in FIGS. 13A-13C. In this method, the user  102  positions his/her knees  112  and  114  and shins  130  and  132  on the limb support areas  36  and  48  of the device  10  respectively as is particularly shown in FIGS. 13A and 13B. The user also positions his/her forearms  104  and  106  on the stationary surface  134  in the manner described above in connection with FIGS. 10A and 10C. After position his/her body in this way, the user uses the lower part of his/her body to move the device  10  in an arcuate path laterally to the left in the direction of arrow  154 A and then in an arcuate path laterally to the right in the direction of arrow  154 B. This exercise may be repeated a plurality of times. Further, it will be understood that rather than positioning his/her forearms  104  and  106  on stationary surface  134  it would be possible for the user to position his/her hands as at hand  108  on the stationary surface  134  as is shown in FIG.  13 C. The exercise would then be conducted in the same way as is shown in connection with FIGS. 13A and 13B. 
     Referring to FIGS. 14-17, the device shown generally at numeral  210  comprises a platform  212  having an upper surface  214  and a lower surface  216 . At the sides of the platform  212 , lateral raised sections  218  and  220  extend upwardly and outwardly. Lateral raised sections  218  and  220  have respectively lateral apertures  222  and  224  which form respectively lateral hand grips  226  and  228  on the lateral raised sections  218  and  220 . Also extending upwardly and outwardly from the upper surface  214  there is a front arc  230  on which there are opposed front hand grips  232  and  234 . Adjacent the lateral raised section  218  on the upper surface there is a recessed limb support area  232  on which a limb support pad  238  is superimposed. Adjacent the lateral raised section  220  on the upper surface  214  there is a recessed limb support area  240  on which a limb support pad  242  is superimposed. On the upper surface  214  there is also a front recessed hand support area  244  on which a front hand pad  246  is superimposed. On the lower surface  216  of the platform  212  there is an attachment recess  248  on which a roller attachment  250  is attached. 
     This roller attachment  250  has an interior central recess  252  which has an upwardly sloped peripheral wall  254 . An inner shoulder  256  extends concentrically outwardly from the upwardly sloped peripheral wall  254 . At the outer peripheral edge of the slide attachment  250 , there is a peripheral rim  258 . The sliding attachment  250  is fixed to the platform  212  by means of plastic fasteners  260 ,  262  and  264  which extend through this peripheral rim  258 . On the lower side of the sliding attachment  250 , there is a ball  265  positioned in an aperture  267  and is retained by a retention ring  269 . There is a peripheral downwardly sloped surface  268  interposed between the retention ring  269  and the peripheral rim  258 . The entire roller attachment rests on a recessed base surface  270  on the platform  212 . On the lower surface  216  of the platform  212 , there are also lateral ridge recesses  272 ,  274 ,  276  and  278 . There are also front recesses  280  and  282  on the lower surface  216  of the platform  212  as well as bottom base recesses  284 ,  286  and  288 . 
     It will be understood that the methods described above may all be practiced with the device  10 , either with or without the sliding attachment  50  or with the device  210  having the roller attachment  250  with the ball  265 . 
     It will be appreciated that there has been described an exercise device and a method for its use which is adapted to exercise abdominal muscles both along the plane of the centerline of the user&#39;s body and to the left and right of such centerline. Such range of motion will facilitate the exercise of all the major abdominal muscle groups as well as other muscle groups. 
     It will also be appreciated that the present invention provides an exercise device where the user may easily grip it a number of ways with both hands in a mutually supporting manner. 
     It will also be appreciated that the present invention is adapted to allow the user to participate in a number of different types of exercises to provide a full range of abdominal muscle exercises as well as to providing a variety in the exercise routine. 
     It will also be appreciated that the present invention is an abdominal exercise device which may be easily and inexpensively manufactured. 
     It will also be appreciated that this exercise device may be easily be used at home and it is compact and adapted to storage in a space efficient manner when not in use. 
     It will also be appreciated that the device described above is sufficiently compact so that it may be readily carried by the user to allow exercising while traveling. 
     Accordingly, the improved ABDOMINAL EXERCISE DEVICE is simplified, provides an effective, safe, inexpensive, and efficient device which achieves all the enumerated objectives, provides for eliminating difficulties encountered with prior devices, and solves problems and obtains new results in the art. 
     In the foregoing description, certain terms have been used for brevity, clearness, and understanding; but no unnecessary limitations are to be implied therefrom beyond the requirement of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed. 
     Moreover, the description and illustration of the invention is by way of example, and the scope of the invention is not limited to the exact details shown or described. 
     Having now described the features, discoveries, and principles of the invention, the manner in which the ABDOMINAL EXERCISE DEVICE is constructed and used, the characteristics of the construction, and the advantageous new and useful results obtained; the new and useful structures, devices, elements, arrangements, parts, and combinations are set forth in the appended claims.