fig1 is a perspective view showing the relation between the first embodiment heel elevator support 100 and the supplemental support 200 . the front end 210 of the supplemental support is adjacent to or touching the rear end 120 of the heel elevator support . the top surface 270 of the supplemental support is visible in fig1 . dotted lines are used to indicate the location of the bottom surface , left side , and right side of the supplemental support . fig2 is a side view of the heel elevator support 100 in use by a patient 50 . the patient and first embodiment heel elevator support are lying the upper surface of a mattress 25 . the patient &# 39 ; s legs below the knees 55 and above the achilles tendon 60 are elevated and supported by the heel elevator support . note especially that the heel 65 and foot 70 are suspended without contact with any surface . fig3 is a side view of the first embodiment heel elevator support 100 with the supplemental support 200 in use by a patient 50 . fig3 is identical to fig2 except that the patient &# 39 ; s legs from the hips 52 to the knees 55 are supported by the supplemental support 200 . fig4 is a perspective view of the ninth embodiment of the heel elevator support . the ninth embodiment is a heel elevator support in which the ramparts are bolsters and the supplemental support is integral with the heel elevator support . visible in fig4 is the rear end 620 , the sloping upper surface 670 , the upper surface 670 of the heel elevator portion , the left bolster 650 , the right bolster 660 , the end 694 of the left bolster , and the end 692 of the right bolster . fig5 is a perspective view of the tenth embodiment of the heel elevator support . the tenth embodiment is a heel elevator support in which the ramparts are palisades and the supplement support is integral with the heel elevator support . the tenth embodiment is identical to the ninth embodiment , and fig5 is identical with fig4 except that a left palisade 658 and a right palisade 668 is present instead of a left bolster and a right bolster ( 650 and 660 in fig4 respectively ). visible in fig5 is the concave surface 652 and end 696 of the left palisade 650 and the concave surface 662 and end 698 of the right palisade 660 . fig6 is a side view of the ninth and tenth embodiments of the heel elevator support . in the ninth and tenth embodiments , the supplemental support is integral with the heel elevator support . visible in fig6 is the bottom 680 of the support , the front end 610 , the rear end 620 , the sloping upper surface 670 , the right side 640 , the right rampart 690 , the outer surface 664 of the right rampart , and the end 692 of the right rampart . fig7 is a plan view of the first embodiment heel elevator support 100 . depicted in fig7 is the front end 110 , the rear end 120 , the left side 130 and the right side 140 , and the top surface 170 . the width of the support from the left side to the right side approximates the width of a bed , and is approximately 26 to 36 inches . the length from the front end to the back end approximates the length of a patient &# 39 ; s lag from knee to achilles tendon . in a preferred embodiment the length ranges from 12 to 25 inches . ramparts elevated above the surface of the support run along the left and right sides to prevent the patient &# 39 ; s legs from falling from the support . in the first embodiment the ramparts are bolsters with the upper surface rounded . a left bolster 150 is integral with the support at the left side 130 and is oriented parallel to the left side . a right bolster 160 is integral with the support at the right side 140 and is oriented parallel to the right side . the bolsters extend above the top surface of the support approximately 1 to 8 inches . a cover 190 encloses the entire cushion 125 . fig8 is a bottom view of the first embodiment heel elevator support . depicted in fig8 is the front end 110 , rear end 120 , the left side 130 , the right side 140 , and the bottom surface 180 . dotted lines indicate the position of the left bolster 150 and right bolster 160 which are not visible in fig8 . a cover 190 encloses the entire cushion 125 . a left hole 192 in the support cover 190 and right hole 194 in the support cover 190 are visible in fig8 . fig9 is an end view of the first embodiment heel elevator support from the rear end 120 . depicted in fig9 is the upper surface 170 , the left bolster 150 , left side 130 , right bolster 160 , right side 140 and bottom surface 180 . a cover 190 encloses the entire cushion 125 . fig1 is a cross section of fig7 taken at 10 — 10 . the features shown in fig1 are the same as the features shown in fig7 . also shown in fig1 is the cushion 125 and the cover 190 . fig1 is a cross section of a second embodiment heel support cushion . this embodiment is identical to the first embodiment heel elevator support except for the inclusion on the top surface 170 of the cushion 125 of two indentations which are parallel with the bolsters , a left indentation 172 and a right indentation 174 . the indentations 172 and 174 have a depth of 1 to 3 inches and run from the front end to the rear end of the cushion and run parallel to the bolsters . the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is an end view of a third embodiment heel elevator support . the third embodiment support is the same as the first embodiment except that the distance between the upper surface 170 and the bottom is approximately 1 to 3 inches less in the third embodiment than in the first embodiment . an insert of visco - elastic foam 176 covers the upper surface 170 of the third embodiment support . the insert has a thickness of 1 to 3 inches . the insert 176 is rectangular and covers the upper surface between the front end , the rear end 120 , the left bolster 150 and the right bolster 160 . the bolsters 150 and 160 extend 1 to 8 inches above the insert 176 . the insert 176 has a composition different from that of the cushion of the first embodiment heel support ( 125 in fig1 ). the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is an end view of a fourth embodiment heel elevator support . the fourth embodiment is identical to the third embodiment heel elevator support except for the inclusion on the top surface 177 of the insert of two indentations which are parallel to the bolsters , a left indentation 173 and a right indentation 175 . the indentations have a depth of 1 to 3 inches and run parallel to the bolsters from the front end to the rear end . the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is a perspective view of the fifth embodiment heel elevator support 500 . depicted in fig1 is the front end 510 , the rear end 520 , the left side 530 and the right side 540 , and the top surface 570 . the width of the fifth embodiment support from the left side to the right side is less than the width of the first embodiment and is approximately 22 to 32 inches . the length from the front end to the back end approximates the length of a patient &# 39 ; s lag from knee to achilles tendon . in a preferred embodiment the length ranges from 12 to 25 inches . in the fifth embodiment the ramparts are palisades 550 and 560 with a concave surface 552 and 562 , respectively , facing the center of the support . a left palisade 550 is integral with the support at the left side 530 and is oriented parallel to the left side . a right palisade 560 is integral with the support at the right side 540 and is oriented parallel to the right side . the left palisade 550 has a concave side 552 which rises from the top surface 570 of the support and a vertical side 554 which is an extension of the left side 530 of the support . the right palisade 560 has a concave side 562 which rises from the top surface 570 of the support and a vertical side 564 which is an extension of the right side 540 of the support . the palisades extend above the top surface 570 of the support approximately 1 to 4 inches . a cover 590 encloses the entire cushion . the bottom view of the fifth embodiment is the same as the bottom view of the first embodiment in fig8 . the fifth embodiment support differs from the first embodiment primarily in the substitution of palisades for bolsters . in addition , the fifth embodiment is narrower than the first embodiment . the fifth embodiment may be more easily packaged than the first embodiment and the fifth embodiment requires less material in manufacture . fig1 is an end view of the heel elevator support from the rear end 520 . depicted in fig1 is the upper surface 570 , the left palisade 550 comprised of the concave side 552 and vertical side 554 , left side 530 , right palisade 560 comprised of the concave side 562 and vertical side 564 , right side 540 and bottom surface 580 . the tops 551 and 561 of the palisades are preferably flat . a cover 590 encloses the entire cushion 525 . fig1 is an end view of a sixth embodiment heel support cushion . this embodiment is identical to the fifth embodiment heel elevator support except for the inclusion on the top surface 570 of the cushion 525 of two indentations which are parallel with the palisades , a left indentation 572 and a right indentation 574 . the indentations 572 and 574 have a depth of 1 to 3 inches and run from the front end to the rear end of the cushion and run parallel to the palisades . the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is an end view of a seventh embodiment heel elevator support . the seventh embodiment support is the same as the fifth embodiment except that the distance between the upper surface 570 and the bottom 580 of the cushion is approximately 1 to 3 inches less in the seventh embodiment than in the fifth embodiment . an insert of visco - elastic foam 576 covers the upper surface 570 of the fifth embodiment support . the insert has a thickness of 1 to 3 inches . the insert 576 is rectangular and covers the upper surface between the front end , the rear end 520 , the left palisade 550 and the right palisade 160 . the palisades 550 and 560 extend above the insert 576 approximately 1 to 4 inches . the insert 576 has a composition different from that of the cushion of the fifth embodiment heel support 525 in fig1 . the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is an end view of a eighth embodiment heel elevator support . the eighth embodiment is identical to the seventh embodiment heel elevator support except for the inclusion on the top surface 577 of the insert of two indentations which are parallel to the palisades , a left indentation 573 and a right indentation 575 . the indentations have a depth of 1 to 3 inches and run parallel to the palisades from the front end to the rear end . the other features shown in fig1 are the same as the corresponding features in fig1 . fig1 is a plan view of the supplemental support 200 . depicted in fig1 is the front end 210 , the rear end 220 , the left side 230 and the right side 240 and the top surface 270 . the width of the support from the left side to the right side approximates the width of a bed , and is approximately 26 to 36 inches . the length from the front end to the back end is approximately 12 - 24 inches . a cover 290 covers the entire cushion 225 . fig2 is a bottom view of the supplemental support . depicted in fig2 is the front end 210 , the rear end 220 , the left side 230 , the right side 240 , and the bottom surface 280 . a cover 290 encloses the entire cushion 225 . a left hole 292 in the support cover 290 and right hole 294 in the support cover 290 are visible in fig2 . fig2 is a cross section of the supplemental support taken at line 21 — 21 . features visible in fig2 are identical to the corresponding features shown in fig1 and 20 . also shown in fig2 is the cushion 225 and the cover 290 . also visible are the right hole 294 in the support cover 290 . fig2 is a bottom view of the first embodiment heel elevator support showing the first embodiment cover 390 . the first embodiment cover is intended for single use . the first embodiment heel elevator support using the first embodiment cover is disposable and is intended for single use . the first embodiment cover is comprised of water - resistant elastomer material . a preferred material is thermoplastic polyurethane film manufactured by j . p . stevens elastomerics of holyoke , mass . in fig2 the first embodiment cover 390 is shown with the bottom cover panel 391 , left cover panel 393 , and rear end panel 395 . also visible is the left cover hole 392 which ventilates the bottom cover panel 391 and left side panel 393 and the right cover hole 394 which ventilates the bottom cover panel 391 and the right side panel ( not visible in fig2 ). the holes in the coating allow the escape of air from the support when it is packaged , and allows return of air when the shape of the support is reconstituted when the package is opened . the holes may be covered with mesh fabric . the first embodiment cover panels are attached to each other by radio frequency ( rf ) welding shown along the seams 396 . the heel elevator support is constructed by first shaping the cushion , then applying cover panels , then welding the panels together by radio frequency welding . other suitable methods for attaching the panels together , such as sewing , heat sealing , or gluing with permanent adhesives , such as epoxy adhesives , may be used . fig2 is a bottom view of the first embodiment heel elevator support showing the second embodiment cover 490 . the second embodiment cover is intended for multiple use . the first embodiment heel elevator support using the second embodiment cover is intended for multiple use . the second embodiment cover is comprised of water - resistant coated fabric material . a preferred material is 70 denier nylon taffeta manufactured by stafford textiles of toronto , ontario , canada . other suitable fabric materials may be used , such vinyl and rayon may be used . the fabric material is coated with a suitable water - resistant polymer such as polyurethane , butyl rubber , vinyl , and thermoplastic urethane . a preferred coatings include polycast coat laminate and staph chek medical grade vinyl . staph check is a trademark owned by herculite products of emigsville , pa . in fig2 the second embodiment cover 490 is shown with the bottom cover panel 491 , left cover panel 493 , and rear end panel 495 . also visible is the left cover hole 492 which ventilates the bottom cover panel 491 and left side panel and the right cover hole 494 which ventilates the bottom cover panel 491 and the right side panel ( not visible in fig2 ). the holes in the coating allow the escape of air from the support when it is packaged , and allows return of air when the shape of the support is reconstituted when the package is opened . the holes may be covered with a mesh fabric . the second embodiment cover panels are attached to each other by sewing along the seams 496 . a zipper 497 which runs along three sides of the bottom cover panel 491 opens the cover so the cushion can be inserted and removed . the heel elevator support is constructed by first shaping the cushion , assembling the second embodiment cover by sewing together the cover panels , inserting the cushion into the cover through the opening 498 defined by the zipper 497 , and closing the opening using the zipper . other suitable methods for attaching the panels together , such as radio frequency welding , heat sealing , or gluing with permanent adhesives , such as epoxy adhesives , may be used . other suitable means for closing the hole 498 such as hook and fabric closures , buttons , and snaps may be used . the reusable water - resistant elastomer material is 70 denier nylon taffeta manufactured by stafford textiles of toronto , ontario , canada . the nylon elastomer is coated with a polycast coat laminate or with staph chek medical grade vinyl . staph check is a trademark owned by herculite products of emigsville , pa . fig2 is a bottom view of the first embodiment heel elevator support showing the third embodiment cover 590 . the third embodiment cover is identical to the first embodiment cover ( shown in fig2 ) except the central portion 592 of the bottom panel 391 has been removed leaving the bottom panel or flange 591 which extends from and is attached to the front , rear , and side panels . a large portion of the bottom of the cushion is not covered when the third embodiment cover is used . the third embodiment cover 590 is assembled as is the first embodiment cover except the third embodiment cover is assembled without including a cushion . after the third embodiment cover is assembled , the cushion is inserted into the bottom of the cover and the cover pulled over the cushion . the flange 591 serves to retain the cover on the cushion . the elasticity of the flange retains the cover in place . alternatively , an elastic cord may be added to the open edge of the flange for additional retention . although the first embodiment heel elevator support has been described with three embodiments of covers , similar covers with similar structures and compositions may be used with the supplemental support and with all embodiments of the heel elevator support . the cushion material used in all embodiments of the heel elevator support and supplemental support is any suitable foam material , such as polyurethane foam , copolymer foam , latex foam . a preferred foam is polyurethane foam . the preferred foam is available in several variations , such a 1a high resiliency ; hd high density , ve viscoelastic , which has very high density . latex foam is less preferred because of the hazard of incurring allergic reactions to the foam . in a preferred foam an antimicrobial additive is included in the foam , bio - pruf . bio - pruf is a trademark for a antimicobial additive obtainable from morton international of cincinnati , ohio . the foam density range is from 1 . 2 to 4 . 6 pounds per cubic foot . the firmness of foam is measured by indention force deflection ( ifd ). a preferred foam has an ifd of 15 to 50 . it is important that the heel elevator support and supplemental support be capable of reduction in volume during shipping , storage , and generally when not in use . the relatively large supports place severe burdens on the storage facilities of hospitals and nursing facilities when the supports are stored . this burden is especially high with cushions using the first embodiment cover , which are disposable and have high inventory requirements . the supply volume problem is alleviated by reducing the volume of packaged supports . in this process , the support is first compressed and reduced in volume to not more than 15 % of freely expanded volume and the compressed support is then packaged by tightly wrapping with a suitably strong material , such as plastic film or fabric straps . in an alternative process the compressed support is placed into a cylindrical cover which is manufactured of a suitable strong material such as plastic film or fabric . removal of the packing material or the cylindrical cover allows the supports to resume a freely expanded volume and be ready for use . in a second method of packing supports , the cushion without a cover is compressed and reduced in volume to not more than 15 % of freely expanded volume and the compressed support is then packaged by tightly wrapping with a suitably strong material , such as plastic film or fabric straps . in an alternative process the compressed support is placed into a cylindrical cover which is manufactured of a suitable strong material such as plastic film or fabric . to prepare the support for use , the packing material or cover is removed , the cushion is allowed to resume the freely expanded volume , and a third embodiment cover is placed over the cushion , thus providing a complete support . it will be apparent to those skilled in the art that the examples and embodiments described herein are by way of illustration and not of limitation , and that other examples may be used without departing from the spirit and scope of the present invention , as set forth in the appended claims .
a heel elevating foam cushion is used to relieve heel pressure ulcers in patients confined to bed . the cushion elevates the lower legs and thereby supports the feet without any contact with the feet . bolsters or palisades on either side of the cushion prevent the legs from falling from the bed , while allowing normal movement of the legs associated with cleaning of the patient , medical treatment of the limbs , etc . the surface of the cushion is covered by a waterproof covering . the cushion may be in a single use or multiple use configuration . a compression process is used to reduce the volume of the cushion by a factor of approximately eight , thereby allowing the convenient storage of cushions without the requirement for extensive storage facilities . the cushion finds application in treating persons with heel or foot pressure ulcers , in treatment of persons after orthopedic surgery , and in recovery from venous surgery for insufficient circulation in the lower limbs .