fig1 shows a perspective view of an exercise device 10 including one embodiment of strap ends 100 , shown individually as strap ends 100 a and 100 b . exercise device 10 is shown for illustrative purposes only , and is not meant to limit the scope of the present invention , except as explicitly claimed . exercise device 10 , for example , includes a door mount 20 , a first inelastic strap 13 , and second and third inelastic straps 11 a and 1 b terminating in grips 17 a and 17 b , respectively . straps 11 a , 11 b , and 13 pass through mechanisms 30 , shown as mechanism 30 a and 30 b that restrain the movement of strap 13 . as is further shown in fig1 , strap 13 includes a first portion 13 a that doubles back through mechanism 30 a as a portion 15 a terminating at strap end 100 a , and a second portion 13 b that doubles back through mechanism 30 b as a portion 15 b terminating at strap end 110 b . the distance between grips 17 a and 17 b may be adjusted according to the length of portions 15 a and / or 15 b by pulling strap ends 100 a and / or 100 b away from mechanism 30 a and / or 30 b . examples of exercise device 10 may be found , for example and without limitation , in co - owned u . s . pat . nos . 7 , 044 , 896 and 7 , 762 , 932 , the contents of which are incorporated herein by reference . each strap end 100 includes a strap pull 101 and a strap restraint 103 . thus , for example , strap end 100 a has a strap pull 101 a and a strap restraint 103 a , and strap end 100 b has a strap pull 101 b and a strap restraint 103 b . as discussed subsequently , strap pull 101 provides a convenient extension of strap 13 to permit the length of the strap to be adjusted . strap restraint 103 and wraps about strap 13 to keep the strap end from moving about . fig2 is a detailed perspective view of one strap end 100 provided a first position , d 1 , as measured from mechanism 30 . strap 11 forms a loop 12 that passes through a ring 31 and a ring 33 of mechanism 30 . mechanism 30 is shown for connecting and adjusting straps 11 and 13 and may be , for example and without limitation , the device described in co - owned and pending in u . s . patent application ser . no . 13 / 194 , 522 , the contents of which are incorporated herein by reference . strap 13 passes through rings 31 and 33 , with strap portion 15 extending from mechanism 30 to strap end 100 . fig3 is a detailed perspective view of strap end 100 in another configuration . specifically , strap pull 101 of fig2 has been pulled away from mechanism 30 , as shown in by the arrow in fig3 , to a larger distance , d 2 , as shown in fig3 , thus shortening the distance between grips 17 a and 17 b . the grip - to - grip distance can be lengthened by releasing mechanism 30 and pulling on grips 17 a / 17 b . fig4 a , 4 b , 5 a , 5 b , and 5 c illustrate the construction of one embodiment of strap end 100 , where fig4 a and 4b and are front and back views , respectively , showing the first steps in the construction of the strap end of fig2 , fig5 a and 5b are front and back views , respectively , showing further steps in the construction of the strap end of fig2 , and fig5 c is a sectional view 5 c - 5 c of fig5 a . as shown in fig4 a and 4b , strap restraint 103 includes a piece of material 400 having a length l and width 3 w , where w is the width of strap portion 17 . material 400 forms a central portion 403 that , along with strap pull 101 , is attached to the end of strap portion 17 by stitching 406 . material 400 also includes with equally sized wings 401 and 405 that extend away from the strap portion . wing 401 has a fastening surface 402 on one side of material 400 , and wing 405 has a matching fastening surface 404 on the opposite side of material 400 . matching surfaces 402 and 404 may be , for example and without limitation , a pair of matching hook and loop surfaces of a set of hook - and - loop fasteners . next , as shown in fig5 a , 5 b , and 5 c , strap restraint 103 further includes a material 500 which is an elastic material sewn into a loop by stitching 501 and is attached to central portion 403 by stitching 503 . as shown in more detail in fig5 c , wings 401 and 405 may be surrounded by elastic material 500 . strap restraint 103 thus holds portion 15 against strap 13 with fasteners — that is , by wing 401 folded first , then wing 405 folded over wing 401 — and with the elastic of material 500 . fig6 a and 6b are a perspective view and a sectional view 6 b - 6 b , respectively , illustrating a method for loosening or tightening the strap restraint of fig2 . material 500 may be pulled way from strap 13 , permitting wings 401 and 405 to be moved and adjusted to control the force by which strap restraint 103 holds strap end 101 to strap 13 . in an alternative embodiment , strap restraint 103 includes wings 401 and 405 , but does not include the outer covering of material 500 . the material of strap 13 and material 400 may be , for example , a nylon webbing , such as a cordura ® webbing . in one embodiment , w is 37 mm and l is 23 mm . the material of strap pull 101 may be , in general , any cord - like material that is relatively inelastic . the material of strap pull 101 may be , for example from 1 to 10 mm in diameter , and may form a loop that extends from 1 cm to 10 cm from the end of strap portion 17 . in one embodiment , the material of strap pull 101 is a 12 cm length of a 7 mm nylon woven cord formed into a loop approximately 6 cm in size . material 500 may be , for example and without limitation , a 23 mm wide elastic band . although the invention ( s ) presented herein have been disclosed in the context of certain preferred embodiments and examples , it will be understood by those skilled in the art that the invention ( s ) extend beyond the specifically disclosed embodiments to other alternative embodiments and / or uses of the invention ( s ) and obvious modifications and equivalents thereof . thus , it is intended that the scope of the invention ( s ) herein disclosed should not be limited by the particular embodiments described above , but should be determined only by a fair reading of the claims that follow .
a strap restraint for a device having adjustable straps is disclosed . in one embodiment , a strap restraint for an adjustable device is provided . the device has a strap with an end that doubles back through a length - adjustment mechanism and over the strap . the strap restraint includes an elastic band attached to the end , where the band encircles the strap , and a pair of flexible inelastic fastening elements attached to the end . the strap restraining permits the user to select the force with which the strap restraint holds the end against the strap .