the cervical traction device 2 preferably includes a series of inflatable regions indicated as 4 , 6 and 8 . these inflatable regions expand and contract by manipulation of the air pump 20 in combination with the open / close valve 22 . the traction device 2 includes front fasteners 12 and 14 for applying the device about the neck of a user essentially in a non - inflated state and the device is then inflated to apply an upward force and extension of the cervical portion of the neck . air conduit 24 effectively connects to the inflatable bladders 4 a , 6 a and 8 a , shown in fig3 . these inflatable bladders are interconnected by the connecting tubes 44 . other arrangements including a manifold can be used for inflating the bladders . as shown in fig3 , 4 , 5 and 6 , the inflatable bladder 6 a is of a smaller size on the interior surface 11 of the cervical traction device 2 . this reduction in size forms a recessed pocket 34 that is sized for receiving the replaceable cold pack 30 . this cold pack can be taken from the freezer and inserted into the recessed pocket 34 and heat is removed from the neck surface of the user adjacent the spinal column . this will reduce swelling in the region and the cervical traction device when inflated causes expansion of the particular joints . although a cold pack 30 is described , other therapeutic packs can be used including a gel heat applying pack or other known therapeutic packs typically for applying or removing heat with or without a moisture component . as shown in fig5 and 6 , the inflatable bladder 6 a is of a reduced width and as such each of the inflatable bladders 4 a and 8 a extend to the position as generally shown by bladder 8 a in the figures . when the cervical traction device 2 is inflated as shown in fig6 , the recessed pocket 34 reduces in size , however there still is substantial space to retain the cold pack 30 that is less compressible . the cold pack is then pressed by the inflated bladder against the user &# 39 ; s neck and is pressed either side of the spine . the user can vary the inflation of the device to achieve a desired extension of the cervical spine in combination with a pressure force pushing the cold pack against the neck of the user . preferably , as shown in fig7 , a removable cover 40 is attached either side of the central inflatable region 6 and this cover separates the outer surface of the cold pack from the skin of the user . the cover is removable to allow for convenient cleaning thereof and to also allow convenient insertion of the cold pack into the recess 34 . as shown in fig3 and 4 , the inflatable regions 4 , 6 and 8 include a sewn cover 50 which includes essentially three sleeves for receiving the inflatable bladders 4 a , 6 a and 8 a , in the cervical traction device and the user does not have access to these bladders . the recessed pocket 34 is exterior to the cover 50 that is also shaped to conform with the configuration of the smaller inflatable bladder 6 a . as seen in fig7 and 8 the cover 50 is shaped to closely fit the bladder 6 and define the recessed pocket 34 . in fig8 the bladder 6 is further reduced in size to increase the size of the recessed pocket 34 . it has been found that this particular cervical traction device that is able to apply heat or cold to the neck region of the user during the expansion of the neck , is advantageous and beneficial . the provision of adapting the central inflatable bladder to define a recessed region between the upper inflatable bladder and a lower inflatable bladder applies heat or cold to the user at a central region and effectively cools or heats a somewhat larger area . the therapeutic pack located between upper and lower bladders 4 a and 8 a is somewhat isolated by the bladders and concentrates the treatment to a desired region . as can be appreciated , if the user does not wish to apply heat or cold in a particular session the cold pack can remain in place if it is effectively at room temperature which would be close to the skin temperature of the user . even if the cold pack is removed the central inflatable bladder 6 a will partially expand into the recessed area and upwardly to provide the desired traction . recessing of the therapeutic pack provides the same fit or comfort of the traction device . the pressure exerted by the therapeutic pack on the neck of the user is similar to the pressure exerted by adjacent bladders . the recessing in the middle bladder is preferably quite substantial ( 40 to 60 % of the depth of the upper or lower bladders ). with this recessed arrangement the recessed bladder and therapeutic pack cooperate to provide traction , temperature therapy and generally consistent pressure ( for comfort to the user ). without the recess , the traction device does not sit in the preferred position and the therapeutic pack provides an excessive pressure point or ridge rendering the traction device less effective . in a modified embodiment both the intermediate bladder 6 a and the lower bladder 4 a are recessed to receive a therapeutic pack . the upper bladder remains without a recess to provide effective engagement of the head to provide traction . the lower bladder 4 a preferably is not recessed in the area where the bladder engages the shoulders of a user . one or more therapeutic packs can be used and the shape thereof will provide an appropriate fit in the recessed pockets . it is preferable that the lower bladder when inflated engages the neck of the user beneath the therapeutic pack . with the present structure a series of bladders and covers cooperate to releasably receive a therapeutic pack on an interior surface for thermal contact with the neck of a user when the bladders are inflated . the preferred structure uses 3 bladders with a center bladder at the interior surface of a reduced depth to define a pocket or cavity for the therapeutic pack . other arrangements are possible to desirably position and return the therapeutic pack or packs at the desired position will still providing the traction device to operate in its intended manner . in the alternate traction 2 a of fig9 the inflatable regions 4 a , 6 a and 8 a extend forwardly beneath a user &# 39 ; s chin as generally shown . as in the earlier embodiment the inflatable region 6 a is of reduced size . in the embodiment shown , region 6 a beneath the chin of a user has a gap relative to the inside edges of upper region 8 a and lower region 4 a . this additional space exerts less pressure on the wearer &# 39 ; s neck at the adam &# 39 ; s apple region . the reduction in size and offsetting still allows effective traction while being more comfortable to use . a further feature of the traction device is the accommodation of the thermal pads 30 a and the concentration thereof adjacent to the inflatable region 6 a . this arrangement provides additional thermal mass in the center region of the inflatable regions for cooling or heating of a user &# 39 ; s neck . with this arrangement the desired cooling or heating effect will remain effective for an additional time and be applied to the desired area . the upper and lower regions when inflated assist in limiting the flow of the gel material upwardly or downwardly . a number of embodiments of the present invention have been described herein in detail , however it will be appreciated by those skilled in the art , that further variations are possible that utilize the principles disclosed herein .
a cervical traction device advantageously includes a therapeutic pack that can be separately heated or chilled for use with the device . the most common application is a cold pack insertable in a recessed pocket of the device to provide cold therapy as the device is inflated during cervical decompression . the structure preferably includes a series of bladders that cooperate to define a cavity for accepting the therapeutic pack on an inside surface for thermal exchange with the neck of a user .