the whole body vibrator as best seen in fig1 , includes a platform 1 provided with two bearing housings 3 ( shown in the form of pillow blocks ) fixed to its underside . these bearing housings 3 support an axle shaft 4 that carries a roller 2 . the roller 2 may be either fixed in its connection to the axle shaft 4 or it may be free to rotate with respect to the shaft 4 ( see fig7 , bearing 4 a ). in the former case , such bearings are fitted into the bearing housings 3 . in the latter case , the bearing 4 a ( fig7 ) in the roller , will permit rotation between the roller and the shaft 4 . the bearing housings 3 need not incorporate true bearings but shaft 4 is fixed in the bearing housings . in either case the roller 2 is eccentrically positioned with respect to the shaft 4 and is dimensioned such that it may easily contact belt 8 of a treadmill 21 when the device is positioned thereon , as seen in fig3 . while the roller 2 is shown with a single shaft with ends protruding from each end of the roller , instead , the outer ends of the roller may be provided with two shaft ends 24 ( fig6 ). such shaft ends 24 have inner portions which are solidly embedded within the interior the roller 2 . the system for employing the vibrator further includes a linkage 6 connecting the platform 1 to the frame 10 of the treadmill 21 via support bar 11 . support bar 11 may be a simple bar as shown in fig3 , 9 and 13 , to be used in cases where the vibrator is to be installed permanently on an oem product , or it can be an adjustable combination of parts 30 and 35 etc as described in detail in fig1 , 11 and 12 . linkage 6 preferably provides longitudinal stiffness to localize the platform on the belt and restrict longitudinal movement of the platform with respect to the belt but lateral flexibility when the vibrator roller 2 is positioned on the treadmill 21 . such lateral flexibility allows the roller 2 to self - align with respect to the belt 8 . the connection point between the linkage 6 and the platform 1 . provided by connection bracket 5 should be sufficiently forward of the roller 2 so as to suppress undue lateral oscillations of the platform 1 . as shown in fig1 and 2 , linkage 6 may be in the form of a strip of a flexible but stiff material such as spring steel or durable , resilient plastic connected at one end to the platform 1 via brackets 5 and connected at its other end to the frame 10 of the treadmill 21 with a bolt ( shown in detail in fig1 , 11 and 12 ) passing through hole 7 and a second set of brackets 39 . during operation , the vibrator 20 is placed in position on the belt 8 of treadmill 21 . a user then climbs on top of platform 1 of the device while using handles 9 to maintain their balance . the user may then activate the belt 8 of the treadmill 21 just as they would if the treadmill were to be used for walking or running . the motion of the belt 8 then frictionally drives and rotates the roller 2 while any longitudinal movement of platform 20 is restricted through the linkage 6 . as the roller 2 rotates under the force of belt 8 , the eccentrically positioned roller moving eccentrically with respect to the shaft ends 4 , imparts vertical oscillatory motion to the ends of the platform 1 as well as a limited horizontal oscillatory movement . the speed of the belt 8 determines the frequency of the oscillation and the user , standing atop the platform 1 , is vibrated within this frequency . the user may continue to use handles 9 to maintain balance and may adjust the speed of belt 8 to produce a desired frequency of vibration . in other words , because of the eccentricity of the shaft through the roller , or the protruding shaft ends 24 , the motion of platform 1 also has partial horizontal rotary motion as well as up and down motion . the position of the user &# 39 ; s feet on the platform determines the amplitude of oscillation experienced by the user . the further apart the user &# 39 ; s feet are , the larger the amplitude of oscillation . the whole body vibrator 20 may be provided with a means to display useful information such as the frequency of vibration , the rate of rotation of the roller 2 , or other such information to a user . this information may be measured with the arrangement shown in fig4 . here a magnet 13 fixed to the roller 2 rotates with the roller 2 and , through its magnetic flux , induces a signal in a magnetic sensor 14 positioned either on the platform 1 or bearing housing 3 . every time the roller 2 completes a rotation , the sensor 14 produces an electrical signal and delivers it to decoder 16 . the decoder 16 then processes the input and provides a display 15 with a signal such that relevant information such as frequency , rotational speed , or the duration of vibration may be displayed to the user . other optical or contact based tachometers may be alternatively used to make similar measurements and provide a signal to the display 15 . another possible modification includes cladding the roller 2 with a resilient layer , such as a sleeve 23 , as shown in fig5 . the resilient sleeve 23 acts as a cushion to minimize noise and to distribute the load more evenly on the belt 8 and the belt substrate of the treadmill 21 . it also serves to increase the friction present between the roller 2 and the belt 8 and reduce slipping while the belt 8 drives the roller 2 . another arrangement is shown in fig8 . for better loading pressure on the belt , we can use two rollers coupled together on a single shaft . the two rollers are fixed together on shaft 4 and they are arranged so that shaft 4 enters the center of roller 2 a and comes out at the other end off center . the same holds for roller 2 b . the two rollers are fixed to shaft 4 so that their eccentricity is 180 degrees out of phase , thus simulating the same arrangement as if they were one long roller as before . a central bearing support 3 a may extend between the lower side of the platform 1 and the center of shaft 4 as shown in fig8 . fig9 shows the treadmill of fig3 with the addition of a bracket 37 . this bracket is used for stowing away the platform 20 when the treadmill is used for walking or running . ( bracket 37 and the mechanism which the bracket and linkage 6 is described further in fig1 , 11 and 12 ). fig1 shows the same drawing as that of fig9 with the platform shown in stowaway position . to understand the stowaway mechanism and the adjustable support bar see fig1 , fig1 and fig1 . in fig1 , parts 35 and 30 make up the expandable support bar . the expandable support bar is used instead of the fixed support bar 11 when the vibrator is made to fit different treadmills that may have different spacing between the treadmill arms 10 tubing 35 are square cross - section tubes that fit into square cross - section tube 30 and form a telescopic arrangement of which the overall length can be adjusted . flanges 32 are flat members which are attached to the ends of members 35 . the function of flange members 32 is to enable attachment of the expandable support bar to the members 10 of a treadmill via clamps 47 . as shown in fig1 , fig1 and fig1 , these drawings show more clearly the mechanism a by which link 6 is free to swing upwards and at the same time , support member 37 can be adjusted at any angle with respect to the vertical position depending on the treadmill &# 39 ; s angle of members 10 ( fig9 ). the stowaway mechanism works as follows . referring to fig1 , 11 and 12 , bracket 37 features two prongs which at one end have holes 44 . holes 44 have clearance for bolt 42 to go through . the same is true for holes 45 on brackets 39 . brackets 39 are spaced apart so that bar 6 can fit between them . item 40 is a sleeve which has an outside diameter so that it fits with clearance through hole 46 on linkage 6 . the length of sleeve 40 is the same as the distance between brackets 39 . sleeve 40 does not pass through holes 45 on brackets 39 . referring to fig1 showing the stowaway mechanism when assembled , bolt 42 goes through one side of bracket 37 , through lock washer 41 , through one side of bracket 39 , and through sleeve 40 which is fitted in hole 46 of linkage 6 . bolt 42 then goes through the other side of bracket 45 , through the other lock washer 41 , through the other hole of bracket 37 and , finally , is attached to nut 43 . by tightening nut 43 on bolt 42 , bracket 37 is squeezed against brackets 39 and lock washers 41 provide friction so that bracket 37 becomes fixed at any position but , at the same time , linkage 6 is free to rotate around sleeve 40 . fig1 a shows the complete bracket 37 . item 38 is a bridge connecting the two prongs of part 37 together . item 38 also provides a resting spot for linkage 6 when in stowed position . in operation , bracket 37 is set to an angle past the vertical position so that when the platform 1 is in stowed position , it will stay up due to gravity . see fig1 . fig1 shows the treadmill - vibrator combination of fig9 with the addition of safety panels 50 and 52 . the purpose of these panels is to prevent a user on the belt while he or she is operating the vibrator . the front panel 50 is tethered on the support bar 11 ( or the equivalent tube 30 ) via flexible straps 51 . the rear panel 52 may be just placed in position and removably fixed by some means like clamps or screws ( not shown ). bars 52 a attached to rear panel 52 prevent the panel from drifting out of place . both of the panels are lifted or held off the belt because they are supported at the ends of the treadmill which are elevated from the belt . the foregoing has constituted a description of specific embodiments showing how the invention may be applied and put into use . these embodiments are only exemplary . the invention in its broadest , and more specific aspects , is further described and defined in the claims which now follow . these claims , and the language used therein , are to be understood in terms of the variants of the invention which have been described . they are not to be restricted to such variants , but are to be read as covering the full scope of the invention as is implicit within the invention and the disclosure that has been provided herein .
this invention relates to a whole body vibrator platform which is attachable to a treadmill . the treadmill belt provides the power to move the platform , translating the horizontal , linear , belt movement into vertical oscillations through one or more eccentrically mounted rollers which support the platform . a person standing on the vibrator platform experiences a vertical vibration at frequencies established by the linear velocity of the treadmill belt .