EP0747616A1 - Valve pour un coussin gonflable - Google Patents

Valve pour un coussin gonflable Download PDF

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Publication number
EP0747616A1
EP0747616A1 EP96109080A EP96109080A EP0747616A1 EP 0747616 A1 EP0747616 A1 EP 0747616A1 EP 96109080 A EP96109080 A EP 96109080A EP 96109080 A EP96109080 A EP 96109080A EP 0747616 A1 EP0747616 A1 EP 0747616A1
Authority
EP
European Patent Office
Prior art keywords
valve part
passage
opening
valve
casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96109080A
Other languages
German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19521008A external-priority patent/DE19521008A1/de
Application filed by WL Gore and Associates Inc filed Critical WL Gore and Associates Inc
Publication of EP0747616A1 publication Critical patent/EP0747616A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
    • A61G7/05738—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with fluid-like particles, e.g. sand, mud, seeds, gel, beads
    • A61G7/05753—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with fluid-like particles, e.g. sand, mud, seeds, gel, beads air-evacuated, e.g. in order to adapt to the form of the patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/05—Parts, details or accessories of beds
    • A61G7/065—Rests specially adapted therefor
    • A61G7/075—Rests specially adapted therefor for the limbs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S5/00—Beds
    • Y10S5/911—Bead containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S5/00—Beds
    • Y10S5/911—Bead containing
    • Y10S5/913—Bead containing with suction means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/3584—Inflatable article [e.g., tire filling chuck and/or stem]

Definitions

  • the invention relates to a valve for an inflatable gas-tight casing and a casing equipped therewith, a method for its production and a positioning aid having such a casing.
  • a conventional cover for example for a pillow, is produced by sewing two cover parts together on their inner sides and then turning them inside out. The edges are therefore within the envelope. The still open side is closed by a zipper or the like. However, this is not possible with a gas-tight envelope.
  • Conventional inflatable gas-tight casings are produced by welding two layers of a gas-tight plastic film, for example two PVC layers, on their outer sides after one of the two casing layers has been provided with a casing inflation hole and a valve for inflating and deflating. Since such casings cannot have a closure such as a zipper, they cannot be turned inside out after the two layers of casing have been welded together. The welded edges that remain outside are disruptive from an aesthetic point of view. In addition, dirt can collect in it, which is undesirable from a hygienic point of view.
  • the two shell layers of the shell can initially be welded all around on their circumference, while the later inside of the shell is on the outside thereof located.
  • the hole perforating the sleeve is made and the inner valve part is attached to the later inside of the sleeve that is still on the outside.
  • the sheath is then slipped through the through opening of the inner valve part such that the actual inside of the sheath, the welding edges and the inner valve part are located inside the sheath.
  • the envelope can be inflated with the aid of the valve having the inner valve part and the outer valve part and, if necessary, can be emptied again.
  • a cushion using a valve according to the invention is set out in claim 12 and a method for its production is set out in claim 13.
  • Magnetic resonance tomographs are increasingly being used today in the context of modern medical diagnostic technology.
  • Measuring coils which are in the form of ring coils, surface flex coils or the like, are used to examine extremities such as arms and legs. be pushed onto a body part to be examined, for example an arm or a leg, or placed on a body part to be examined, for example the trunk, shoulder or neck.
  • the body part to be examined should not move relative to the measuring coil during the measuring process. This is quite difficult since the scanning or measuring time of an MRI scanner is usually in the range of 30 to 45 minutes. During this long period, the body part to be measured must be kept free of blurring so that a sufficiently good and thus diagnosable representation of the body part to be examined is achieved.
  • Such a tripod device works well because it allows the body part to be examined to be kept very calm even over a long period of time.
  • the solution consists in a positioning aid according to claim 14, which can be developed according to claims 15 to 18.
  • This positioning aid comprises an envelope according to the invention which is partially filled with particles and which is coated on the outside with waterproof, water vapor-permeable material or consists of such material. In the latter case, material is used that is gas-tight despite permeability to water vapor. Microporous polytetrafluoroethylene (PTFE) is a particularly suitable material for this.
  • the waterproof, water vapor-permeable material can be provided on the outside with a knitted textile, which increases the comfort when using the positioning aid and protects the material from the outside.
  • the volume of the shell constructed with gas-tight material and coated with waterproof, water-vapor-permeable material or consisting of such material can be changed by more or less large gas inclusion, namely by supplying or suctioning gas into the shell or from the envelope over the valve of the envelope.
  • the envelope is up to a particle fill volume, which is a predetermined fraction of the maximum inflation volume of the envelope, with small particles filled. These are of such a small size that they allow the at least partial, form-fitting immersion of the body part to be stored when they are lying loosely against one another. Their surfaces have such a surface friction factor that, when the casing is evacuated to approximately the particle filling volume, they essentially retain their positions which were assumed before the evacuation.
  • the particles preferably consist of small plastic spheres.
  • the patient places the body part to be examined on the outside of the envelope. Since the particles are easily movable relative to one another with this degree of filling of the shell, the body part to be examined sinks at least partially into the cushion, similar to if the body part to be examined were placed in a pile of sand.
  • the casing is then connected to a suction device via the valve and evacuated down to approximately the particle filling volume. Because of this evacuation, the particles are pressed together by the shell, similar to how they would be pressed together by means of a shrink film.
  • the particles Due to their surface friction and this shell pressure, the particles essentially retain those positions which they have assumed after the body part to be examined has been placed on the shell which has not yet been evacuated. The previous state is frozen by the evacuation.
  • the evacuable sheath thus acts practically like a shrink film, the state of shrinkage of which can be removed by later gas inlet into the sheath.
  • this positioning aid corresponding to the contour of the body part to be examined is also retained.
  • the body part to be examined can therefore remain in this immersion form for a long time, which is optimally adapted to the outer contour of this body part. this leads to to the fact that this part of the body can be held immovably on this positioning aid for a period of time as required for measurement by means of an MRI scanner.
  • a positioning aid for magnetic resonance imaging body parts has thus been made available, which ensures that the body part to be examined is securely immobilized for a relatively long time, is inexpensive to produce, does not need to be arranged firmly on the patient table and does not require any modification the use of differently dimensioned measuring coils. Since a substantial part of the body part to be examined can rest on this positioning aid and since sweat liquid can be drained off with waterproof, water vapor-permeable material due to the covering or structure of the covering of the positioning aid, this represents a particularly comfortable positioning aid. Because of this material, this positioning aid can also be used wash easily and keep clean.
  • PTFE Microporous stretched polytetrafluoroethylene
  • stretched PTFE provided with hydrophilic impregnating agents and / or layers as described in US Pat. No. 4,194,041
  • breathable polyurethane layers or elastomers such as copolyether esters and their laminates as described in U.S. Patents 4,725,481 and 4,493,870.
  • This positioning aid can not only be used for the temporary positioning of parts of the body to be measured, for example in connection with magnetic resonance imaging, but also as a permanent positioning aid for patient positioning.
  • the storage aid in the non-evacuated, ie malleable Condition a molded part with a shape corresponding to the wound site is placed and its shape impression is saved by evacuation in the positioning aid. After the molded part has been removed, the patient can be positioned on the positioning aid in such a way that his wound site is positioned over the position of the shape impression of the positioning aid. This prevents lying on the wound or wound site.
  • This positioning aid can also be used successfully in the operation area.
  • the position of the patient to be operated on can be fixed at will and according to changing requirements by means of the positioning aid without many different pillows, in particular wedge pillows, being required for this.
  • FIG. 1 shows a casing 13 according to the invention as part of a positioning aid 11.
  • This positioning aid has a gas-tight casing 13 covered with micro-porous PTFE, within which there are a large number of small parts, in particular plastic balls 15. These plastic beads 15 are only filled up to a fraction of the maximum inflation volume of the envelope 13.
  • the casing 13 is provided with a valve 17 according to the invention, by means of which gas can be sucked out of the casing or gas can be let into the casing.
  • the valve 17 prevents gas flow through the valve 17 as long as the valve 17 is closed.
  • An arm and a hand 19 of a patient to be examined are shown placed on the positioning aid 11 and partially immersed.
  • the positioning aid 11 is shown in FIG.
  • the plastic spheres 15 fill the casing 13 roughly, which in the state shown has been evacuated to approximately the particle filling volume and, in this evacuation state, acts like a shrink casing.
  • the plastic spheres 15 are therefore "frozen” in their position taken in the casing 13 during the evacuation state and retain this position until gas can flow into the casing 13 again through the mouthpiece 17 and the freeze state or shrink casing state is canceled again.
  • a measuring coil (not shown) of a magnetic resonance tomograph can be placed around the associated upper arm, for example, in order to carry out a nuclear sprint tomographic measurement on the upper arm.
  • FIGS. 2 and 3 show an inner valve part 21 and an outer valve part 23 of a valve, as is preferably used for the casing 13 according to the invention.
  • the inner valve part 21 comprises a cylinder 25 open at both ends, at the lower end of which a cylinder flange 27 is provided in FIG.
  • the casing 13, which is only indicated in FIG. 2, has a perforating hole (not shown) with a diameter which is approximately as large as the inside diameter of the cylinder 25. By means of the cylinder flange 27, the inner valve part 21 is welded gas-tight onto the inside edge of this hole.
  • a hose passage opening 31 is introduced, into which a hose can be inserted, through which air or another gas can be let into the casing 13, for example pumped into it, or can be suctioned out of the casing 13.
  • the entire casing 13 can be turned inside out through the cylinder opening 29 in such a way that the outside of the casing 13 is then outside at all points and all the welding edges of the casing 13 are now on the inside of the casing.
  • the cylinder 25 and the cylinder flange 27 are also on the inside of the sleeve 13.
  • the outer valve part 23 has the shape of a cylinder, on the lower end of which in FIG. 3 an outer valve part flange 35 is provided.
  • the outer valve part flange 35 By means of the outer valve part flange 35, after turning the cushion inside out, the outer valve part 23 is welded in a gas-tight manner onto the outer edge of the hole perforating the casing 13 in such a way that an inner opening 37 of a passage passage 39 passing through the outer valve part 23 is aligned with the through opening 33 of the inner valve part 21.
  • the Passage passage 39 preferably has approximately the same diameter as the cylinder 25 of the inner valve part 21.
  • the small parts, preferably plastic balls 15, which are arranged inside the casing 13 of the positioning aid 11, can be introduced through the through opening 33 of the inner valve part 21. After the cover 13 has been turned inside out, they are filled in through the passage opening 33.
  • the outer valve part 35 is welded onto the outside of the cover 13. Via the passage passage 39 of the outer valve part 35 and the passage opening 33 of the inner valve part 21, there is a ventilation duct from the outside into the interior of the casing 13.
  • a tube 43 is passed through the passage passage 39 and the passage opening 33 and has an inner end 45 opening into the interior of the casing 13 and an outer end 47 protruding from the outer opening 41 of the outer valve part 35.
  • the outer end can be connected permanently or temporarily to a pump / suction device (not shown) in order to bring the positioning aid 11 into the formable state or the state with a fixed shape, as desired.
  • the positioning aid 11 In applications in which the positioning aid 11 is used in a constant place of use, it can be advantageous to permanently connect the hose 43 to a pump / suction device. In this way, the ventilation processes and the evacuation processes can each be carried out very quickly, which is advantageous in the case of a rapid change of patients. In addition, the permanent connection of the hose 43 to the pump / suction device a vacuum loss can be compensated for, which can arise due to imperfect tightness of the casing 13.
  • the inner end 45 of the hose 43 is inserted into the hose passage opening 31 and is held by the side walls. This ensures a relatively firm hold of the inner end 45 of the hose 43.
  • FIG. 5 shows an embodiment in which a closing valve 49 is arranged in the passage 39. This can be opened by inserting a hose (not shown in FIG. 5) through the outer opening 41 into the passage 39 through the closing valve 49 constructed with closing lamellae, so that the positioning aid 11 can be vented or evacuated.
  • a closing valve 49 is arranged in the passage 39. This can be opened by inserting a hose (not shown in FIG. 5) through the outer opening 41 into the passage 39 through the closing valve 49 constructed with closing lamellae, so that the positioning aid 11 can be vented or evacuated.
  • the passage opening 33 of the inner valve part 21 and / or the passage passage 39 of the outer valve part 23 can be provided with a sieve-like grille (not shown). This can be arranged, for example, at the location of the closing valve 49 or, if this is not required, in its place.
  • the outer opening 41 of the outer valve part 35 can also be provided with an extension piece which can be connected to a conventional pump, such as is used for example for inflating bicycle tires, air mattresses or the like.
  • a conventional pump such as is used for example for inflating bicycle tires, air mattresses or the like.
  • the positioning aid 11 can be ventilated or evacuated by means of such a pump.
  • the outer opening 41 can also be closed with a closure element (not shown in FIG. 5), for example in the form of a plug which fits into the outer opening 41.
  • FIG. 6 shows an embodiment in which a closure element in the form of a cap part 51 is used.
  • This points the Form of a cylinder, which has an inner blind hole 53, the inner dimensions of which correspond to the outer dimensions of the outer valve part 23.
  • the cylinder height of the cap part 51 is chosen so high that it completely engages over the outer opening 41 when it is completely fitted onto the outer valve part 35.
  • the inner blind hole 53 is preferably dimensioned such that the cap part 51 sits in a gas-tight press fit on the outside of the outer valve part 35.
  • the cap part 51 can either be used instead of the closing valve 49 or in addition to it. In the latter case, a particularly good valve closing effect is obtained.
  • an (essentially) gas-tight gluing can also be carried out.
  • the cylinder parts of the two valve parts 21 and 23 extend to opposite sides of the envelope region located between their cylinder flanges 27 and 35.
  • the cylinder flange 27 of the inner valve part 21 has been fastened to the inside of the sleeve 13 which is turned outwards, not only the sleeve 13 is turned back through the through opening 33 of the inner valve part 21 but also the cylinder 25 of the inner valve part 21 is thereby Cylinder flange 27 slipped through, after which the cylinder is on the other side of the cylinder flange 27 than before.
  • FIG. 2 shows the outside of the turned-back sleeve 13, the cylinder flange 27 located after the turning back on the inside of the sleeve 13 and the cylinder 25 of the inner valve part 21 protruding from the outside of the turned-back sleeve 13 and thus from the outside of the positioning aid
  • This cylinder 25 of the inner valve part 21, which protrudes from the outside of the casing 13, is then plugged onto the outer valve part 23, specifically in the orientation as shown in FIG it is shown in Figure 3 with respect to Figure 2. That is, for the plugging of the outer valve part 23 onto the cylinder 25 of the inner valve part 21, the two figures 2 and 3 can be imagined as a single figure.
  • the cylinder area of the outer valve part 23 can consist of solid material into which the passage 39 is incorporated, e.g. in the course of an injection molding process.
  • the cylinder area of the outer valve part 23 can be made hollow like a cylinder hat and the passage 39 can be formed in the interior thereof with the aid of a tube or hose.
  • the outer diameter of the cylinder 25 of the inner valve part 21 and the inner diameter of the passage passage 39 of the outer valve part 23 are preferably matched to one another in such a way that the passage passage 39 receives the cylinder 25 in a snug fit or even in a press fit.
  • passage opening 33 receives the passage passage 39, it is possible to provide a correspondingly opposite reciprocal dimensioning of the passage opening inner diameter and the passage passage outer diameter.
  • the hose passage opening 31 in the cylinder wall of the inner valve part 21 can be used to receive a part of the outer circumference of the part of the passage 39 which is horizontal in FIG. As a result, the overall height of the valve assembly having the inner valve part 21 and the outer valve part 23 is reduced.
  • the casing 13 of the positioning aid 11 can additionally be provided with a foam covering on its outside. This results in a better pressure distribution, for example when the head of a patient is supported on the positioning aid 11. In this way, an optimal head adjustment can be achieved in comparison with a foam cushion made entirely of foam material and uncomfortable pressure is exerted on it a head side, as can occur with a foam pillow, avoided.
  • the positioning aid according to the invention can therefore also advantageously be used as an (orthopedic) pillow, not only for sick people but also for healthy people who want to achieve optimal support for their head and cervical vertebrae while lying down.

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  • Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Check Valves (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
EP96109080A 1995-06-08 1996-06-05 Valve pour un coussin gonflable Withdrawn EP0747616A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19521008 1995-06-08
DE19521008A DE19521008A1 (de) 1994-11-25 1995-06-08 Lagerungshilfe zur Lagerung von Patientenkörperteilen

Publications (1)

Publication Number Publication Date
EP0747616A1 true EP0747616A1 (fr) 1996-12-11

Family

ID=7763972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109080A Withdrawn EP0747616A1 (fr) 1995-06-08 1996-06-05 Valve pour un coussin gonflable

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US (1) US5971006A (fr)
EP (1) EP0747616A1 (fr)

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US6226820B1 (en) * 1999-07-12 2001-05-08 Polymer Concepts, Inc. Gel pad with integral shape retainer
US20090000625A1 (en) * 2007-06-29 2009-01-01 Alfery David D Patient Arm Pad
US8128559B2 (en) 2007-11-26 2012-03-06 Ethicon Endo-Surgery, Inc. Tissue retractors
US10531859B2 (en) 2008-01-02 2020-01-14 Arcscan, Inc. Components for a precision ultrasonic scanning apparatus for body parts
US8758252B2 (en) 2008-01-02 2014-06-24 Arcscan, Inc. Innovative components for an ultrasonic arc scanning apparatus
WO2009124271A1 (fr) * 2008-04-03 2009-10-08 Arcscan, Inc. Procédures pour un appareil ultrasonore à balayage arc
EP2299912A4 (fr) * 2008-05-29 2013-01-23 Arcscan Inc Tête de balayage composée pour un appareil d'échographie
US9149254B2 (en) 2008-12-15 2015-10-06 Arcscan, Inc. Alignment and imaging of an eye with an ultrasonic scanner
US8510883B2 (en) 2009-10-30 2013-08-20 Arcscan, Inc. Method of positioning a patient for medical procedures
US9597059B2 (en) 2012-05-17 2017-03-21 Arcscan, Inc. Correcting for unintended motion for ultrasonic eye scans
US9320427B2 (en) 2012-07-09 2016-04-26 Arcscan, Inc. Combination optical and ultrasonic imaging of an eye
US9456943B2 (en) 2013-08-22 2016-10-04 Prs Medical Technologies, Inc. Conformable support system
CA2977756A1 (fr) 2014-02-24 2015-08-27 Arcscan, Inc. Systeme d'oculaire jetable pour appareil de balayage oculaire a ultrasons
US20150336227A1 (en) * 2014-05-20 2015-11-26 GM Global Technology Operations LLC Reconfigurable fixture for sheet metal parts and method
US10226551B2 (en) * 2014-11-25 2019-03-12 Cassemco, Inc. Apparatus and methods for foam positioner manufacture
US10888301B2 (en) 2015-10-13 2021-01-12 Arcscan, Inc. Ultrasonic scanning apparatus
US11426611B2 (en) 2015-10-13 2022-08-30 Arcscan, Inc. Ultrasound therapeutic and scanning apparatus
JP6649744B2 (ja) 2015-10-29 2020-02-19 エンジニアリングシステム株式会社 医療用体位保持具

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US1513523A (en) * 1923-11-26 1924-10-28 Rothhirsch Michael Valve for inflatable bags for footballs
US2062248A (en) * 1934-04-13 1936-11-24 Collette Mfg Company Process of making bladders for footballs and the like
US3070479A (en) * 1957-12-13 1962-12-25 Meyer Horst Inflatable balls
DE1550186A1 (de) * 1965-06-08 1969-07-17 Dunlop Rubber Co Aufblasventil fuer ein Rettungsfloss
US3762404A (en) * 1969-08-21 1973-10-02 Olympic Surgical Co Inc Positioning aid
DE2504232A1 (de) * 1975-02-01 1976-08-05 Willi Schmidt Kissen, insbesondere zur schienung und lagerung von kranken gliedmassen und anderen koerperteilen des menschen
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Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1513523A (en) * 1923-11-26 1924-10-28 Rothhirsch Michael Valve for inflatable bags for footballs
US2062248A (en) * 1934-04-13 1936-11-24 Collette Mfg Company Process of making bladders for footballs and the like
US3070479A (en) * 1957-12-13 1962-12-25 Meyer Horst Inflatable balls
DE1550186A1 (de) * 1965-06-08 1969-07-17 Dunlop Rubber Co Aufblasventil fuer ein Rettungsfloss
US3762404A (en) * 1969-08-21 1973-10-02 Olympic Surgical Co Inc Positioning aid
DE2504232A1 (de) * 1975-02-01 1976-08-05 Willi Schmidt Kissen, insbesondere zur schienung und lagerung von kranken gliedmassen und anderen koerperteilen des menschen
GB1591024A (en) * 1977-09-20 1981-06-10 Burnett J S Support device

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Publication number Publication date
US5971006A (en) 1999-10-26

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